Latest News

Stay on top of new developments with logger updates, research studies, online tools and more. Our monthly newsletters cover the latest.

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September 28. - 2023

Novel Procedure For Implanting Bio-Loggers In Atlantic Bluefin Tuna

Measuring heart rate using bio-loggers in free swimming fishes to detect their response to environmental impacts is a promising tool in aquaculture. It is of great value to have an insight into what drives migration in fish and the impact this could have on commercial utilization and conservation. Due to the logistic challenges that are involved, especially in the study of physiology of large pelagic fish, it has been vital to design simple, less stressful procedures. To perform an invasive surgery into the body cavity to place a bio-logger close to the heart is a difficult option on a commercial vessel with the risk of harming these large fish.
September 28. - 2023

Coastal Ecosystem of Bangladesh Mapped – Salinity and Nutrients Major Drivers of Phytoplankton

Sub-tropical coastal ecosystems are seen as a central place for species diversity. However, little is known about these regions and the lack of data is hindering informed species conservation strategies. For this reason, a study was conducted to understand and estimate the nature of spatial variability of the aquatic ecology of the coastal regions of Bangladesh. The causal relationship between environmental variables and phytoplankton species abundance was also examined.
August 29. - 2023

Changes in Milking and Feeding Routines Can Reduce Heat Stress in Dairy Cows

Free ranging dairy cows are at high risk of developing heat stress under warm weather conditions, consequently increasing the chance of severe production and welfare problems. This is especially a threat where there is little or no shade in the grazing pastures. Lactating cows are prone to heat stress due to the increased internal heat production associated with milk production and rumination. To counteract the heat stress they seek shade, increase water intake, eat less and milk production declines.
August 29. - 2023

Syrian Hamsters Show Drop in Temperature Post-Infection with H1N1

The significance of vaccine development against the influenza virus remains critical due to the constant antigenic drift that aids the influenza virus in evading the existing immunity in the human population. Consequently, the importance of annual vaccination, and vaccination being the most effective preventative action in preventing disease from the influenza virus.
August 18. - 2023

Publish Your Bio-Logging Data

Have you used bio-logging data in your fish research and want to publish it, check out these special issues: 1) Journal of Fish Biology (Advances in telemetry approaches and technologies applied to fish ecology and management) 2) Biology (Sensor Application to Study the Biology of Fish Movement)
July 27. - 2023

Heart Rate Is A Valuable Indicator of Health in Farmed Olive Flounder

Olive flounder (Paralichthys olivaceus) is a common fish farmed in aquaculture settings in South Korea. As the general public becomes more and more aware of the importance of animal welfare, and in this case, fish welfare, there is an increased demand for the development of sustainable aquaculture. A major benefit accomplished by prioritizing the welfare of farmed fish is, among other things, higher yield and superior meat quality.
July 24. - 2023

Star-Oddi at Conferences in the Autum

Star-Oddi will exhibit at the American Fisheries Society Annual Meeting on August 20-24, in Michigan, USA. We will also attend Aquaculture Europe 2023 in Vienna, Austria, 18-21 September.
June 16. - 2023

Star-Oddi team at summer conferences

We will be exhibiting our small, simple to use, physiologgers at various conferences this summer. You can meet us at SEB 2023 in Scotland, and the 13th International Mammalogical Congress in Alaska. Come for a chat, and meet our experts, and see how you can add value to your research.
June 16. - 2023

Neutralizing Antibody Response Against Five Viruses Induced After Vaccination with MOPEVACNEW Vaccine

New World arenaviruses (NWAs) are known to cause haemorrhagic fevers and can have high mortality rates. Due to endemic NWAs viruses in South America and recent re-emergence of Machupo (MACV) virus, there is considerable need to discover novel approaches to vaccine development. Neutralizing antibodies (Abs) are critical in protection and control of NWAs.
June 2. - 2023

Star-Oddi at the OCEANS conference in Ireland

Star-Oddi will be showcasing at the OCEANS conference and exposition in Limerick, Ireland, June 5-8.
March 30. - 2023

Star-Oddi at the American Physiology Summit, APS

We will be exhibiting our small, simple to use, physiologgers at the American Physiology Summit, Long Beach, California, in April. Come for a chat, and meet our experts, and see how you can add value to your research.
March 30. - 2023

Star-Oddi's data loggers in virology studies

Our data loggers have been shown to be ideal for virology and vaccination studies. The temperature and activity loggers are reliable and simple in use, and are used in all biosafety levels. We have gathered publications in this field that can be accessed here.
March 30. - 2023

Warming Summer Temperature Impact Deer Mice via Thermoregulatory Trade-offs

Increasing temperatures as a result of global warming, could pose a thermoregulatory challenge to endotherms. The impact of these changes on physiology, health and distribution of animal species is advancing. The repercussions of persistent exposure to temperatures above the thermoneutral zone (TNZ) during the day and below during the night are uncertain. Could this mean that there is thermoregulatory trade off?
March 30. - 2023

Flank Temperature Correlates with Core Body Temperature in Piglets

In livestock an increase in body temperature is usually the first sign of sickness and is also an indicator of stress response in the animal. Even more it shows the natural variation of responsiveness of breed and sex to stress.
March 29. - 2023

Course on sensor applications for aquatic species

Our product expert will be part of the WIAS course team of international experts, who will be giving lectures on sensor applications for aquatic species.
March 29. - 2023

ECG analysis made easy

Star-Oddi is proud to announce the official release of its ECG and heart rate analysis tool, HRT Analyzer, for users of Star-Oddi‘s heart rate loggers. With the use of the HRT Analyzer, users can process raw ECG data to further extend and improve the quality and usability of the data.
March 21. - 2023

Rechargeable tilt and compass loggers now available

Star-Oddi is proud to announce that the popular Starmon Tilt and Starmon Compass loggers are now rechargeable. The battery life on a single charge is significant and can be recharged 500 times before a battery replacement is needed.
February 16. - 2023

Star-Oddi Presence at Conferences in 2023

Star-Oddi will be exhibiting physiologgers at the American Physiology Summit, Long Beach, California, in April; and at the 13th Mammalogical Congress, held in Anchorage, Alaska, in July. Swing by and say hello to our team of experts, and get information on how our physiologgers can add value to your studies.
February 16. - 2023

Case study on Torpor and Hibernation

If you are interested in these kind of studies you can find relevant information summarized on this topic. We have gathered and made an abstract from publications using our data loggers in torpor and hibernation studies.
February 16. - 2023

Data Logger Implantation in Non Human Primates

Kasi Russell-Lodrigue, DVM, at Tulane National Primate Research Center, in collaboration with our heart rate product expert Asgeir Bjarnason worked together on a poster presented at AALAS 2022. The poster presents two different ways of implanting Star-Oddi heart rate (HR) and activity data loggers in NHP.
February 16. - 2023

A universal influenza mRNA vaccine shows promising results in ferrets

An article published in Science Advances in December of 2022 looked into the efficacy of nucleoside-modified mRNA-LNP vaccines technique. During the Covid-19 pandemic it was shown that vaccine based on this technique has great potential. Traditional influenza vaccines are limited in their ability to protect against new or mutated strains of influenza viruses.
February 16. - 2023

Human Torpor? Activating Excitatory Neurons in the Hypothalamus Induces Hypothermia in NHPs

Warm blooded animals maintain body temperature within a narrow range, and both hypothermia and hyperthermia are medical emergencies. In primates the knowledge about the thermoregulation center in the hypothalamus is limited.
December 30. - 2022

Torpor and Hibernation Studies in Focus at SICB 2023

We are soon heading to Austin, Texas in the US to attend the SICB 2023, The Society for Integrative & Comparative Biology Annual Conference. There we will be exhibiting our small, implantable physio-loggers.
December 14. - 2022

Happy Holidays!

The Star-Oddi team wishes you happy holidays and a prosperous new year! We thank you for your cooperation in 2022. During the holiday season, our offices will be closed on December 26th.
December 14. - 2022

No Difference Found Between Chemical- and Electroanesthesia in Walleyes

Stress due to handling is inevitable when exposing fish to invasive procedures during research, management, and aquaculture activities. This will induce a stress response which is important to reduce by using appropriate anesthesia and immobilization techniques. Welfare is a crucial factor when capturing, handling and releasing fish, lowering the risk of negative consequences from acute and perhaps chronic stress.
December 14. - 2022

Successful Novel Catch Limitation System for the Deep-Sea Blue Whiting Fishery

The largest commercially exploited stock of mesopelagic fish in the Northeast Atlantic Ocean is the blue whiting (Micromesistius poutassou). The multi-national fishing fleet fishing the blue whiting consists mainly of large pelagic trawlers that use fishing trawls usually larger than 2000 m in stretched circumference and vertical and horizontal mouth openings exceeding 100 m.
November 28. - 2022

See You at SICB 2023

We will be exhibiting our physiologgers, measuring heart rate, activity and temperature at SICB 2023! We are looking forward to meeting everybody! Come by our booth for a chat on how they may suit your study, or to take part in our Raffle!
November 28. - 2022

Ventrolateral Locus in the Hypothalamus Affects Sexual Behaviour and Body Temperature

One of the fundamental behaviours of mammalian species is sexual behaviour, which is crucial for the survival of the species. Sexual hormones are known to be implicated in behavioural changes during the reproductive cycle. What remains in the dark is the underlying cellular functions and connections linked to the reproductive cycle.
November 28. - 2022

Rhythm in Body Temperature During Hibernation Influenced by Snow Depth Covering the Dens

The Scandinavian brown bear (Ursus arctos) has adapted to harsh winter conditions in northern Scandinavia by going into hibernation. During hibernation, different biological rhythms in activity and temperature have been noticed which are naturally regulated by environmental factors such as daylight. Research of various rhythms in wild animals has contributed greatly to the field of ecology, but little focus has been on the physiology behind these rhythms.
October 5. - 2022

Poster on Cardiovascular Screening

Do you want to see more from SPS 22 conference? Download a poster written by our product expert, Ásgeir Bjarnason, in collaboration with Pfizer. It shows how you can use Star-Oddi's loggers for cardiovascular screening using minimally invasive and low-cost solutions.
September 30. - 2022

Is the House Shrew Novel Animal in Torpor and Hibernation Studies?

Unriddling the mechanism behind torpor and hibernation is of interest and could be medically beneficial in treating many species including humans. Mice have been used as study animals of torpor and they only enter torpor when challenged with food deprivation or a combination of cold surroundings and food deprivation. The house musk shrew (Suncus murinus) has shown intermittent low body temperature without food restriction and short light period. The purpose of a recent study was to determine if the House musk shrew could be a novel animal for these kinds of studies.
September 29. - 2022

Working Shifts Impairs Mitochondrial Functioning on Various Levels

Increased incidence of Type 2 diabetes mellitus (T2DM) in shift-workers may potentially indicate an imbalance in temporal energy supply and demand. In the current study, various methods were used to evaluate the difference between normal ad libitum (AL) feeding vs time restricted feeding using the light phase as a model for shift work.
August 31. - 2022

Diving Depth of Migrating Atlantic Salmon

The Atlantic salmon (Salmo salar L.) is an important indicator for the health of freshwater and coastal ecosystems. Contrary to the Pacific salmon (Oncorhynchus sp.) which dies after spawning, the Atlantic salmon spawns more than once in its lifetime. The success of this repeated spawning depends on the ability to migrate between fresh water and marine feeding grounds where the fish is exposed to variety of human made stressor.
August 30. - 2022

Star-Oddi at OCEANS in the US

Star-Oddi will be exhibiting at OCEANS Conference & Exposition 2022 in Hampton Road, Virginia, USA, on October 17-20, 2022.
August 29. - 2022

Wider Low Salinity Range Now Offered in Our Popular Small CTD and CT Loggers

Following the successful launch of our wide salinity range in the small size DST CTD and CT logger series last year, we now offer a wider range in our low conductivity range logger. It now covers a conductivity range from 0.1 to 6 mS/cm, allowing for fresh to slightly saline water applications.
August 25. - 2022

No Short- or Long-Term Effect of Implanting Bio Loggers in Axolotl Salamanders

In the times of climate change and other challenges in environmental temperature that impact the ecology and conservation of animals, amphibians and reptiles are extremely vulnerable to these changes. Being ectotherms, the ambient temperature affects their body temperature directly and impacts fundamental functions as metabolic rate, physiology, and behaviour. This shows in their performance and fitness.
August 25. - 2022

Influenza Vaccine Containing Homologous Neuraminidase Can Reduce Disease

There are two main antigens of influenza viruses, the hemagglutinin (HA) and the neuraminidase (NA) surface glycoprotein. In the past the NA has been disregarded or placed in the background of vaccine design. While lowering the severity of the disease, NA antibodies are infection tolerant, while HA antibodies directly neutralize the virus infection. For a number of years, when the HA component of vaccines did does not match the HA of circulation seasonal strains, the hypothesis was that an antigenically matched NA protein could make up for a lower vaccine efficacy.
June 23. - 2022

48h Recovering Time Suggested to Stabilize Heart Rate Levels Under Standard Farming Operations

Increased animal welfare is important for the aquaculture industry since the aim is to improve the health of the farmed fish and reduce stressful events that can lead to degraded product quality and, in worst case, mortality.
June 21. - 2022

Anti-biofouling Device for CTD and CT Loggers

We are happy to announce an anti-biofouling device, copper grid, for our popular DST CTD and DST CT salinity loggers. It helps decrease biofouling on the conductivity sensor to a large degree.
June 16. - 2022

Star-Oddi at SEB and ICBF in France

We are soon heading to France to attend two conferences where we will exhibiting our small, implantable, data loggers that can measure variables such as heart rate, activity, temperature and depth. If you are going, we hope to see you there.
May 27. - 2022

Timing of Birth in Primates Can Be Detected with Distinct Post-Partum Hyperthermia

The majority primate births occur during the inactive period of the day. Birthing influences the mother’s body temperature in a distinct way, marked by a drop in maternal body temperature during labor followed by a distinct increase in body temperature in the hours right after the birth.
May 27. - 2022

Canadian Lynx Lives up to Its Reputation of Being a “Lazy Cat” While Effectively Minimizing Energy Expenditure

Due to the many challenges scientists face when it comes to studying mesocarnivores living in extreme cold environment, like the Canadian lynx (Lynx canadensis), little is known on their energy expenditure, behaviour, and metabolic responses to the environment. In this study the scientist investigated patterns of energy expenditure especially in relation to their body size, environmental conditions, and activity.
April 28. - 2022

Stress Indicators in Atlantic Salmon Measured with Heart Rate and Swimming Activity

Aquaculture farming of Atlantic Salmon has seen a steady growth globally supplying ocean-based protein with continuously increasing scale of the operation. Bigger production systems and more exposed locations put pressure on the industry to maintain fish welfare and improve farming operations such as fish handling which is believed to be a major cause for mortality in sea cages.
April 28. - 2022

No Effect on Cardiac Performance with Impairment of Blood Flow in Male Smallmouth Bass

Little is known about the effect of angling-induced hook damage to the gills in fish. In a recent study, researchers looked at parental care behavior and reproductive fitness, as well as heart rate performance in male smallmouth bass (Micropterus dolomieu) with compromised branchial and coronary blood flow. Negative effects were expected on all three parameters, which turned out was not the case.
March 29. - 2022

Kisspeptin May Play a Key Role in Controlling the Circadian Rhythm of the Core Body Temperature

Kisspeptin is known to influence fertility and metabolism. In a study made by scientists at the School of Human Sciences in the University of Western Australia and Department of OBGYN and Reproductive Sciences at UC San Diego. They compared transgenic mice that totally lacked kisspeptin (Kiss1r-KO), with wild type (WT) mice and for the first time mice that have about 95% reduction in Kiss1 transcript levels (Kiss1-Cre).
March 29. - 2022

Daily Heterotherm Patterns Shift Into Multiday Torpor Patterns During Winter in Monitos

In a study conducted by scientists in Chile at Instituto de Ciencias Ambientales y Evolutivas, Center of Applied Ecology and Sustainability (CAPES), Millenium Institute for Integrative Biology, and Instituto de Biología, core body temperature was used to determine torpor and hibernation periods in Monito del Monte marsupials (Dromiciops gliroides) during winter. Torpor bouts were detected both in lab settings and in the field.
February 17. - 2022

Our Popular Starmon Tilt Logger Now with Twice the Memory Size

The memory size in the Starmon tilt logger has now been doubled and is 6.7 million measurements per sensor; acceleration-tilt (3-D), depth and temperature. This durable titanium logger is ideal for analysing movements of subsea gear, whether for profiling or long-term monitoring.
February 17. - 2022

Star-Oddi at Oceanology in London

We will be exhibiting at the Oceanology International in London, UK, on March 15-17, 2022. Our experts in booth #C300 will be demonstrating CTDs and multi sensors and will be happy to finally meet you in person!
February 17. - 2022

Meet Star-Oddi at AQUACULTURE 2022

Star-Oddi will be exhibiting at the AQUACULTURE 2022 in San Diego, USA, on February 28 - March 4. Visit our booth #517 and check out our world-leading heart rate, activity, depth and temperature loggers!
February 17. - 2022

Higher Heart Rate Observed in Confined Compared to Free Swimming Seabreams

The cardiovascular system plays a key role in the ability of fish to survive and thrive in their environment. In a recent study, researchers expected to demonstrate that swimming activity measured with accelerometers was a determinant of cardiac activity measured through heart rate.
January 26. - 2022

High Grazing Density Alters Circadian Rhythm of Cows

Heart rate is commonly used as an indicator for animal welfare in relation to circadian rhythm. In a study conducted by scientists at Universidad de Salamanca and Universidad de Zaragoza, it is used as an indicator for changes of the circadian rhythm of cows that were subjected to rotational grazing between low density grazing and high density grazing for a short period of time.
January 25. - 2022

Clinical Disease not Observed in Ferrets Inoculated with SARS-CoV-2

Many researchers have been investigating if ferrets are a suitable model for COVID-19 research as it is for influenza. A study carried out by researchers at Centre for Infectious Disease Control, Animal Research Centre, and Microscope Consultancy in the Netherlands investigates if there is a connection between age and inoculation route.
November 25. - 2021

Sick Vervet Monkeys Rest More, Feed Less, and are Attacked More Frequently than Healthy Monkeys

Gregarious animals can be temporarily affected by fever and other physical responses to infection. This can offer other members of the group a competitive advantage. To study the effects of illness in a group of vervet monkeys (Chlorocebus pygerythrus), social behavior and body temperature of 43 animals was monitored over an extended period of time.
November 25. - 2021

Two Animals Measured in one Deployment

Our loggers are used to measure a wide variety of animal species but scientists getting data from two animals in one deployment is a first for us. A Baltic cod (Gadus morhua) was tagged as part of the international tagging project TABACOD in 2018. The tag was one of Star-Oddi’s DST micro-TD loggers that measure temperature and depth.
October 28. - 2021

Elevated Cortisol Key Driver to Lower CTmax in Trout Exposed to Chronic Stress

It has been showed that juvenile rainbow trout (Oncorhynchus mykiss) held in pairs form dominance hierarchies in which subordinate individuals experience chronic social stress accompanied by lower thermal tolerance.
October 12. - 2021

Our CTD & CT Loggers Now with Wide Salinity Range

We are proud to announce enhanced wide salinity range in our popular DST CTD and CT logger series. The enhanced range covers conductivity ranges from 3 to 68 mS/cm, allowing a wide variety of monitoring applications. This can, for example, be beneficial in situations where salinity fluctuates from low to high salinity.
September 22. - 2021

Microsphere Vaccine Formulation Protects Macaques During SARS-CoV-2 Infection

Infection with SARS-CoV-2 can lead to a variety of clinical manifestations, from asymptomatic to fatal. While scientists are still working on understanding this variation fully, viral control is currently considered to be affected by acquired immune effectors, antibodies and CD8+ T cells.
September 22. - 2021

Unlike Other Large Ungulates, Wild Boar Heart Rate Peaks in Early Spring

In early summer, large ungulates typically show a single seasonal peak for heart rate. A recent study performed at the University of Veterinary Medicine in Vienna, Austria, demonstrates that this does not hold true for female wild boars (Sus scrofa), using heart rate as a proxy for energy expenditure.
September 1. - 2021

Unique Bio-Logging Measurements of Atlantic Salmon During Heat Wave and Mass Mortality

Water temperature is increasing and oxygen levels decreasing at sea-cage sites due to climate change. These conditions may become a challenge for the aquaculture industry as they negatively affect growth and welfare of marine sea-caged fish.
August 31. - 2021

Short-term Reverse Migration Common for Pink Salmon

Anadromous fishes like salmon hatch and spend their juvenile period in freshwater. This is followed by migration to, and maturation in the sea. Adult fish then migrate back up rivers to reproduce in freshwater habitats. A researcher at Japan Fisheries Research and Education Agency has looked closer into the reverse migration and probing behaviour of pink salmon (Oncorhynchus gorbuscha) after its return to fresh water.
July 14. - 2021

Microsphere Vaccine Formulation Protects Macaques During SARS-CoV-2 Infection

Recent studies have suggested that an accumulation of sequence variations in the SARS-CoV-2 virus’ spike genome could cause current vaccines to lose efficacy.
July 14. - 2021

New Micro-sized Activity Logger

We are pleased to announce that we have released a new activity logger in our popular micro size.
June 30. - 2021

Heart Rate Measurements During Routine Aquaculture Practices Leading up to Slaughter

Finfish aquaculture has seen a great increase in recent decades with an estimated 369 species farmed worldwide, but physiological data is lacking on many of them. In a recent study, researchers at the Swedish University of Agricultural Science and University of Gothenburg highlight the importance of performing a long-term evaluation of free swimming fish in aquaculture.
May 27. - 2021

Mice Treated with Tamoxifen Show Comparable Side Effects to Humans

Treatment with adjuvant tamoxifen has proven to increase breast cancer patient’s survival rate. However, it is not without considerable side effects. Patients on tamoxifen can, for example, experience hot flashes, changes in bone density and fatigue.
April 28. - 2021

New Enormous Deep-Sea Predator Detected in Japanese Waters

Researchers from the Japan Agency for Marine-Earth Science and Technology (JAMSTEC) have, along with nine other institutes, discovered a novel deep-sea fish species in the Suruga Bay, Japan. In a recent paper, the scientists describe the discovery of a colossal slickhead (Narcetes shonanmaruae) which was detected unintentionally during research trips investigating the faunal diversity and environment in waters below 2,000 meters.
March 24. - 2021

Ferrets a Suitable Animal Model for Ebola Studies

While most eyes are currently focused on the Covid-19 pandemic, scientists continue to try to learn more about other zoonotic diseases that have the potential to threaten public health. One of these diseases is Ebola, caused by the Ebola virus.
March 24. - 2021

Meet our Upgraded Heart Rate and Activity Loggers

We are always striving to improve our product range to meet our customer's needs. Our most recent product updates involve improvements for our smallest and largest heart rate and activity loggers.
February 4. - 2021

Upwelling Confirmed Off the Tanzanian Coast for the First Time

Upwelling is an oceanographic phenomenon that involves wind-driven motion of dense, cooler, and usually nutrient-rich water from deep water towards the ocean surface, replacing the warmer, usually nutrient-depleted surface water. Upwelling along the Tanzanian coast has long been suggested, and it is of importance as around 60 million people live within 100 km of the coastline. Many inhabitants are dependent on the ocean for employment and resource for food.
February 4. - 2021

Atlantic Salmon Implantation Recovery Time Is Four Days on Average

Biologgers are becoming increasingly popular to measure free-swimming fish. However, attaching or implanting these devices inevitably requires handling of the animals. Any handling of the study animal can lead to a stress response. To be able to interpret data correctly it is important to know how long it takes the fish to recover from handling, anaesthesia and surgery so that data from the recovery period can be excluded from the data analysis.
December 28. - 2020

African Green Monkeys Established as Suitable Model for Covid-19

A large part of gaining a better understanding of the SARS-CoV-2 virus that causes Covid-19 is finding the most suitable animal models to study the effects of the disease. As primates are our closest relatives in the animal kingdom they have been one of the animal groups used to study the pathogenesis of the disease.
December 22. - 2020

Unnatural Light at Night Has no Effect on Heart Rate or Activity in Caribbean Spiny Lobster

Research has been carried out investigating how artificial light at night impacts the ecosystem and its inhabitants, but the effects on aquatic invertebrates specifically are poorly understood. Light pollution is a fast-increasing threat to terrestrial and aquatic biodiversity and has, for example, been proven to disrupt diel cycle.
December 18. - 2020

Core Body Temperature Cannot be Approximated with Infrared Thermography in Wild Primates

Measuring body temperature in animals is one method of measuring their response to changing environments. One of the methods used in the field is infrared thermography which measures the temperature on the body’s surface noninvasively, but it remains unclear whether these measurements reflect core body temperature accurately.
November 19. - 2020

Lack of Teeth and Gill Rakers May Indicate a Relationship to Spawning

In 2016, two adult barracudina (Arctozenus risso) were caught off the Flemish Cap, Newfoundland, Canada. These specimens were special since they showed unusual attributes including loss of gill rakers and teeth and fragile jaw bones. Moreover, both fish also had ripening ovaries and testes, which confirms simultaneous hermaphroditism.
November 17. - 2020

Heart Rate Loggers do not Compromise Swimming Performance During a Critical Swim Speed Test in Atlantic Salmon

Extensive research has been carried out on exercise physiology of fish, especially on swimming abilities, metabolic rate, heart function and acid-base balance of salmonids. It is widely known that increased oxygen uptake rates and cardiac output support the aerobic metabolic need of exercising muscles until the maximum capacity of the cardiorespiratory system is reached.
October 7. - 2020

Heart Rate and Swimming Activity Used to Measure Stress Response in Atlantic Salmon

Aquaculture farming of Atlantic Salmon has seen a steady growth globally. Bigger production systems and more exposed locations put pressure on the industry to maintain fish welfare and improve farming operations. This includes methods used for fish handling, which is believed to be a major cause of mortality in sea pens.
October 2. - 2020

High Hydrocarbon Concentrations in Fish in the Gulf of Mexico

The marine oil and gas industry has been present in the Gulf of Mexico (GoM) since 1938. By 2018, it covered over 5.3 million hectares in U.S. waters alone, with more than 10,000 platforms and active rigs and 27,000 abandoned wells. In the southern GoM there are more than 2,000 offshore wells and thousands of miles of pipelines.
October 5. - 2020

Snowshoe Hares and North America Red Squirrels Show Different Responses to Environmental Changes

How animals handle changes in the environment differs from species to species. Different species sharing the same habitat can even show different responses to environmental changes.
September 30. - 2020

First Publication Using Star-Oddi Loggers in Covid-19 Research

Since early in the Covid-19 pandemic Star-Oddi has been supplying researchers with loggers for use in research on this novel virus. We are proud to be able to provide research tools for research on Covid-19 and place the highest priority on delivering them as quickly as possible.
July 20. - 2020

Air Exposure Most Critical Factor for Survival of Discarded Fish

The Common Fisheries Policy (CFP) is a set of rules for managing European fishing fleets and for conserving fish stocks. The landing obligation, meaning that you must bring all caught fish to land, of the new CFP has a “high survival”-exemption. This implies that it is permitted to discard fish with scientifically high chances of surviving both capture, handling and release.
July 16. - 2020

Cardiac Performance not Linked to Reproductive Behaviours in Wild Sockeye Salmon

Dominance is a strategy commonly used to improve an individual’s chances of reproductive success. It has been suggested that dominance may be related to physiological performance. However, so far there has been little research to back this up.
July 9. - 2020

Research opportunities due to COVID-19

Due to the COVID-19 pandemic, many research projects have been interrupted because scientists cannot access their equipment or workspace. However, a study published in Science shows that lockdown in India provides a unique opportunity to collect data that would otherwise be impossible to obtain.
July 7. - 2020

Shift Workers at Risk of Disruption to Physiological Rhythms

Modern societies rely increasingly on shift work. Meanwhile, studies have shown that this sort of work can potentially negatively affect our health. It has, therefore, become increasingly important to understand whether shift work has a long-last effect on human health.
June 30. - 2020

Female Moose Demonstrate Hypometabolism During Winter

Understanding how animals living at high latitudes respond to changes in their environment has long interested researchers. In a recent study, scientists at the Inland Norway University of Applied Sciences and the Swedish University of Agricultural Sciences looked at seasonal differences in temperature and heart rate in female moose in Scandinavia.
June 1. - 2020

Barely any COVID-19 in Iceland

Iceland is now in a unique position compared to other countries with regards to the spread of COVID-19. The country has had extremely few deaths and nearly COVID-19 free, as no new cases of the virus have been reported for several days.
May 29. - 2020

Video Available for Star-Oddi’s Heart Rate Webinar

Our webinar Heart Rate Measurements in Fish: Methods, Surgery, and Experimental Design on May 7th was a great success. Nearly 90 participants listened to and interacted with the presenters during the webinar.
June 4. - 2020

Surgical Experience Provides Clearer Benefits for Post-surgical Recovery than Antibiotic Use

Bio-logging has proven to be a unique way to gather information on free ranging animals over short and long periods of time. However, many bio-logging devices required surgical interventions often followed by post-surgical prophylactic treatments. One of the treatments commonly used after surgical procedures in fish is the antibiotic enrofloxacin.
May 29. - 2020

First Mussel Invasion Due to Climate Change Discovered in Antarctica

Climate change affects global biodiversity in many ways. Biodiversity is both declining and distributed differently across the globe, and the last untouched region may be the Antarctic. Researchers from Chile, Canada and USA recently reported findings of the first settlement of the Chilean blue mussel (Mytilus cf. platensis) in a shallow subtidal habitat of the South Shetland Islands in the Antarctic. This indicates a potential for coming invasions of the Antarctic ecosystem.
April 30. - 2020

Webinar on Heart Rate Measurements in Fish: Methods, Surgery, and Experimental Design

On May 7, 2020, Star-Oddi will host a webinar on heart rate measurements in fish. The webinar will focus on methods, surgery, and experimental design when working with heart rate loggers in fish. The workshop will take place through Zoom at 20:00-21:30 CEST/13:00-14:30 ET and is open to current users as well as anyone interested in heart rate measurements in fish.
April 30. - 2020

New Data Logger Release: Starmon Compass, with Heading-Tilt-Depth Sensors

Star-Oddi is proud to announce Starmon compass, a new compass heading data logger with high accuracy and a large memory. This robust logger is ideal for analysing heading direction and tilt movements on subsea gear and robotics.
March 25. - 2020

Heart Rate Loggers a Reliable Way to Determine Cardiac Breaking Points

As global warming increases it is becoming more and more important to understand how higher temperatures will affect both aquatic and terrestrial animals. A recent study, published by a research group from Rhodes University and the South African Institute for Aquatic Biodiversity.
March 23. - 2020

Star-Oddi Loggers Used in Virology Research for Over 15 Years

Since Star-Oddi launched the first data loggers in 1993 our loggers have been used in a wide variety of research. After the release of our first implantable temperature sensor in 2003, one of the most prominent fields of research has been in the field of virology, including vaccine development.
March 23. - 2020

Business as Usual at Star-Oddi

While the Covid-19 pandemic has created uncertainty for people around the world we want to assure our customers that services at Star-Oddi remain the same.
March 4. - 2020

Star-Oddi CTDs and multi sensors at Oceanology in London

Star-Oddi will be showcasing at the OI Oceanology International exhibition in London, December 1-3, 2020. If you are planning on going, then please be sure to visit us at stand C750.
December 30. - 2019

Coliform Mastitis Vaccines Show a Decline in Effectiveness During the Lactation Period in Cows

Coliform mastitis is a common issue in dairy cows that can affect both the wellbeing of the animal as well as the amount of milk it produces. A research group including scientists from Virginia Tech and DairyNZ Ltd. recently compared the effect of two commercially available J5 bacterin vaccines.
December 23. - 2019

Star-Oddi Supports the Big Blue Ocean Cleanup

Star-Oddi recently became a member of the Ocean Protection Project run by the Big Blue Ocean Cleanup.
December 19. - 2019

New, Smaller Activity Loggers

We recently released a smaller version of our popular activity loggers. Our activity loggers now come in two different sizes, milli and centi, and are suitable for a wide range of animal sizes.
December 9. - 2019

Varying Salinity Levels Affects Clam’s Activity and Behaviour

When trying to understand the effects of physiological stress on organisms living within the sediment, it is of great importance to recognize the relationship between the behaviour of these organisms and the fluctuating stressors, such as salinity in the surrounding waters. This is difficult to study and quantify, especially as these organisms, i.e. clams, are living deep in the sediments.
December 6. - 2019

Product News: Titanium Housing and Extended Depth Ranges for Starmon Loggers

To better meet the needs of a durable and robust device in demanding ocean environments, we now offer the Starmon TD (temp-depth) and Starmon tilt (acceleration-tilt-temp-depth) in titanium housing.
November 4. - 2019

Heart Rate Appears to be Unrelated to Nesting Behaviour in Male Smallmouth Bass

Cardiac function has been found to be a limiting factor when it comes to animals’ ability to cope with physiological challenges. Parental care is one such challenge which has not been widely assessed in wild animals.
October 31. - 2019

Majority of Atlantic Halibut is not Swimming Long Distances

Atlantic halibut (Hippoglossus hippoglossus) is widely distributed from the United States to Norway but is considered a “Species of Concern” in US waters. Not much is known about their movements and population, and in some years the abundance has been close to being below the detectability levels, according to NOAA Northeast Fisheries Science Center.
October 17. - 2019

Star-Oddi at OCEANS in Seattle

Star-Oddi will be showcasing at the OCEANS Conference in Seattle, October 28-30 2019. If you are going, then please be sure to visit us at booth #715.
October 11. - 2019

Better Understanding Sleep Homeostasis

Sleep is an essential part of our life and the longer we stay awake, the greater the urge to sleep becomes. Research has shown that following sleep deprivation we experience sleep that is longer and deeper than normal.
October 9. - 2019

Thermophysiology of Flying Squirrels

The Star-Oddi loggers are used in a variety of studies, including MSc projects. In one such project, Vanessa Hensley, a MSc student at The University of Maine, studied changes in body temperature of North American southern flying squirrels (Glaucomys volans).
October 7. - 2019

Preventing Logger Migration in the Abdominal Cavity

Data loggers can provide valuable information to many types of animal studies. As with anything else, though, the quality of the results is dependant on the correct use of the devices.
September 24. - 2019

Observing Hooking of Other Fish Does not Result in Avoidance of Future Hooking in Rainbow Trout

Recreational fishing has long been a popular pastime in industrial countries. In recent years more focus has been put on reducing the impacts of recreational fishing on fish populations.
September 20. - 2019

Water Temperature Affects Shark’s Reproduction Pattern

A study, carried out in Argentina, shows correlation between seawater temperature variations and changes in the plasma levels of three sex steroid hormones, related to reproduction of the narrownose smooth-hound shark (Mustelus schmitti).
July 5. - 2019

Star-Oddi at EOUC in Romania

On August 26-30, we will be exhibiting our loggers at the 12th European Ornithologists' Union Congress in Cluj-Napoca, Romania...
July 3. - 2019

Heart Rate Loggers Offer a Novel Way to Evaluate Stress Response and Welfare of Fish

Heart rate loggers offer a novel way to record physiological changes in various animal species. To date, Star-Oddi's leadless heart rate loggers have been used successfully in at least 20 fish species...
July 1. - 2019

Seasonal Changes in Wolverine Body Temperature and Activity Identified

Wolverines (Gulo gulo) are well adapted to the extreme conditions of their northern habitat. To learn more about the species’ ecophysiology researchers at Inland Norway University of Applied Sciences, Stockholm University...
June 21. - 2019

Multiple Stressors Can Lead to Increased Mortality for Farmed Fish

Welfare of fish in aquaculture is an important concern, as it is estimated to impact between 37 and 120 billion individuals every year, and is a growing concern for consumers, producers, interest groups and authorities...
June 19. - 2019

Meet Us at SEB in Sevilla in July

Star-Oddi will be exhibiting at the Society for Experimental Biology’s annual meeting 2019 in Sevilla, Spain on July 2-5...
June 17. - 2019

Sound Exposure Does Not Affect Long-term Behaviour and Physiology in Fish

Oil and gas industries using airguns for offshore seismic exploration add to globally increasing anthropogenic noise levels in the marine environment...
March 29. - 2019

Heart Rate Sensors Help with Analysis of Energy Expenditure

Wild animal activities and their internal processes are energetically costly. The amount of energy they can obtain and use is inevitably limited, which means they need to make compromises...
March 27. - 2019

Heart Rate and Temperature Loggers Used in Lumpfish

Star-Oddi's leadless heart rate and temperature loggers are being used to record valuable physiological data in lumpfish...
March 25. - 2019

A Visit from Outer Space

We at Star-Oddi got the honor of having Bjarni Tryggvason, the only Icelander who has traveled to outer space, come visit us a few weeks ago...
March 8. - 2019

Improved Heart Rate Loggers Allow Better Measurements of Slow Heart Rates

We have released an updated version of our DST milli-HRT and DST centi-HRT, leadless heart rate, and temperature loggers...
March 6. - 2019

Needle-free DNA Influenza Vaccine Shows Promising Results in Rhesus Macaques

Unlike conventional influenza vaccines, DNA vaccines can be produced rapidly for global coverage. This is a clear benefit should we be faced with an emerging influenza pandemic in the future...
March 4. - 2019

Japanese Black Bears Demonstrate Higher Heart Rate than Scandinavian Brown Bears During Hyperphagia

Hibernating bears go through hyperphagia each year to gain fat reserves before hibernation. In a recent study, heart rate measurements were used to compare the metabolic rate between two bear species...