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Laboratory & Wildlife Newsletter                                              October 2016
New Release
Measure Long-term Acceleration Derived Activity 

We are happy to announce the newest additions to Star-Oddi‘s DST family: the DST centi-ACT, ac
tivity and temperature logger, and DST centi-HRT ACTcombined activity, heart rate and temperature logger.

The new loggers give researchers the opportunity to measure acceleration derived activity and identify correlation between temperature and heart rate.

Overview of changes in animal activity over time
The logger makes it possible to view overall changes in the study animals‘ activity over time. It is suitable for use in behavior and stress response studies, in the fields of laboratory, wildlife and animal welfare science.

Suitable for long term studies
The activity loggers have a battery life of over 3 years (at 1 minute sampling intervals), for the DST centi-ACT, and 19 months (with sampling interval of 10 min), for the DST centi-HRT ACT. The loggers are especially useful when a comprehensive data set throughout the research with no disturbance to the animal is needed.
 
From the Lab
H7N9 Vaccine Shows Promising Results In Ferrets

Avian influenza viruses have gained a lot of attention in recent years due to their potential public health risk as they continue to cross the species barrier. An example of this is the H7N9 strain of the virus that emerged in China in 2013 which has lead to 657 cases and 261 deaths. Because of its potential to transmit among humans potential vaccines are in development through the WHO's Global Action Plan.

In one study, published in Molecular Therapy, researchers developed an intranasal H7N9 live attenuated vaccine and tested it in ferrets with induced acute severe viral pneumonia.

Monitoring Core Body Temperature
To monitor core body temperature during the study Star-Oddi‘s DST micro-T temperature logger was implanted intra-abdominally in each ferret and programmed to record temperature at 30 minute intervals. This made it possible to monitor core body temperature for each animal throughout the study. Average body temperature was found to be ~1.2°C above normal with the highest fever being 3°C above baseline.

A Potential Vaccine
The vaccine was shown to be safe and protected the ferrets against fever, weight loss, severe pneumonia and death. Due to the positive results the vaccine will be clinically evaluated to assess its potential use in humans.
From Nature
Measuring Body Temperature in Overwintering Box Turtles

Normally turtles are not equated with freezing temperatures. There is however one species, the Eastern Box Turtle (Terrapene carolina), that can tolerate subzero temperatures while overwintering, and in laboratory settings the species has been found to be able to withstand up to 58% of their body water freezing.

In a recent study this adaption was tested systematically under field conditions for the first time using Star-Oddi's micro sized logger to record internal body temperature.

Subcutaneous Implantation
The leadless logger was implanted subcutaneously in the anterior cervical region at the thoracic inlet of a wild adult male living near Brookhaven, NY. Temperature data was collected every 15 minutes for approximately three months (November-January) and removed the following summer.

A Super-Cooled Turtle
During the winter months body temperature ranged from -0.8°C to 13.7°C. One subzero event was identified lasting 31.5 hours in mid January. During this time the turtles‘ body temperature was recorded as -0.8°C for 2.5 hours. 

This is the first time that researchers have been able to identify duration of subzero temperature events. From the data the researchers were able to conclude that the turtle most likely did not freeze during the winter months but rather super-cooled close to its limit.

The paper can be accessed
here.
 
Star-Oddi at The Wildlife Society‘s 2016 Annual Conference

We are currently in North Carolina exhibititing our miniature loggers at The Wildlife Society’s 2016 Annual Conference in Raleigh (October 15th-19th).

If you are attending come and say hi!

Fun Fact: 10th Century Viking Sword discovered by goose hunters

A group of goose hunters recently stumbled upon a valuable find while hunting in Skaftarhreppur in the south of Iceland. What they found was a very well preserved viking sword. One of the hunters posted a picture of the sword on his Facebook page and received a call from the the Cultural Heritage Agency of Iceland just a few minutes later.

Experts at the agency estimate that the sword is about 950 to 1000 years old; only 22 swords of this kind have been found in Iceland until now so this is an extremely valuable find. They also suggest that the sword is part of a pagan burial ground, called "Kuml" in Icelandic, but people were often buried with their most prized possessions in the pagan ritual. It is believed that the sword was brought to the surface by a recent glacial outburst flood in the area.

Data Storage Tags-DSTs

Star-Oddi has been manufacturing and developing DSTs since 1993. The data loggers are used for various animal research studies. You can find our whole product range here. The following sensors are available:

Copyright © 2016 Star-Oddi, All rights reserved.


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