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Aquatic & Fisheries Newsletter                                              September 2017
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BLS6 heart rate workshop: Guest speakers confirmed

In our May newsletter we announced an upcoming workshop on using our leadless implantable heart rate loggers to measure heart rate in mammals, fish and birds at the 6th International Bio-logging Symposium in Konstanz, Germany, on September 25-29.

The workshop will take place on Wednesday September 27 at 9AM-4PM. Registration will be possible at the conference.

Joining us for the workshop are some experienced users who will present how they have used the loggers in various animal models.

The speakers are, in order of appearance:

Implantation of heart rate loggers in large mammals; bears, reindeer and moose
Alina Evans, Inland Norway University of Applied Science
Validating heart rate measurements in domestic sheep
Boris Fuchs, Inland Norway University of Applied Science

Heart rate measurements in Blackbirds
Nils Linek, Max Planck Institute of Ornithology
Heart rate measurements in sockeye salmon and smallmouth bass
Tanya Prystay, Fish Ecology and Conservation Physiology Lab, Carleton University

Heart rate measurements in Rainbow trout, Arctic char and Atlantic Cod
Albin Gräns, Swedish University of Agricultural Sciences

For more information on the workshop please see the symposium program or contact us.
Photo: Daiju Azuma

Increased Distribution of Juvenile Pacific Herring in Shallow and Fresh Water

Sean Lewandoski and Mary Anne Bishop at the Prince William Sound Science Center have recently published a paper outlining their research on juvenile Pacific herring distribution and its environmental and geospatial factors. Up until now there has been little research on the subject. 

Data sampled at different locations
The research was conducted at Prince William Sound which is located on the south coast of Alaska. There the juvenile Pacific herring was sampled at nine different locations during November 2013, 2014 and 2015. In addition, herring was sampled during a 7 month period at Simpson Bay. All the samplings took place during night-time

The herring was caught using a midwater trawl. Star-Oddi's DST CTD was fitted on the trawl head rope to collect data on depth, temperature and salinity. Once onboard, the fish was measured to determine its age. Herring shorter than 105mm was classed as age-0 (in its first year of life) and fish measuring between 106-150mm was classed as age-1.

Juvenile herring keeps at fresh and shallow water in proximity to eelgrass beds
The study revealed that there was a close link between the distribution of age-0 Pacific herring and the presence of eelgrass beds. The herring preferred to stay in shallow water, below 35.4m, and its distribution was greater in fresher water. The long term study at Simpson Bay also revealed that while age-1 Pacific herring moved to the outer bay in the spring months, the age-0 herring preferred to stay in the inner bay.

To learn more about the research please click here.
Published Research Using our Sensors

You can view an extensive collection of scientific papers and posters using our sensors in various types of aquatic and fisheries research which can be found on our website. To view the research, please click on the following link.

If you have a story or research to share with us, please contact us.
Star-Oddi at the 6th International Bio-logging Symposium

We are heading to Germany this month to showcase our leadless implantable loggers at the 6th International Bio-logging Symposium on September 25-29 in Konstanz, Germany.

If you are attending we invite you to visit our booth as well as attend our workshop on using our leadless heart rate loggers in free ranging animals.

More information on the workshop can be found in the article to the left.
Photo: Sigurður Atlason

Icelandic Raven in Danger of Becoming Extinct?

It was reported recently that the Icelandic raven is in danger of becoming extinct. Ornithologists lay the blame on the lax hunting regulations around the birds as it is allowed to hunt them all year round.

It is estimated that around 3000 ravens are hunted each year, mainly because of their danger to other bird species and crops.

The raven has featured prominently in the Icelandic sagas and folklore. The Norse god Odin had two ravens, Huginn and Munin, and the first Norseman who set out to find Iceland, Hrafna-Floki, brought with him three ravens.   

In folklore he is often seen as an omen of both good and evil, often depending on the direction from which he is spotted.

The raven is attracted to shiny things and a bit of a kleptomaniac as many Icelanders who have happened to store food outside their houses have undoubtedly experienced.
Data Storage Tags - DSTs

Star-Oddi has 25 years of experience making small, high performing loggers for oceanographic, fish and marine animal studies, as well as for wild and lab animals.

You can find our whole product range here.
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