scholarly journals A field test of the use of pop-off data storage tags in freshwater fishes

2017 ◽  
Vol 91 (6) ◽  
pp. 1623-1641 ◽  
Author(s):  
G. D. Raby ◽  
T. B. Johnson ◽  
S. T. Kessel ◽  
T. J. Stewart ◽  
A. T. Fisk
Keyword(s):  
Data Storage ◽  
Field Test ◽  
Freshwater Fishes ◽  
Data Storage Tags

A tool for analyzing information from data storage tags: the continuous wavelet transform (CWT)

2007 ◽  
Vol 18 (3) ◽  
pp. 301-312 ◽  
Author(s):  
Sam Subbey ◽  
Kathrine Michalsen ◽  
Geir Kjetil Nilsen
Keyword(s):  
Wavelet Transform ◽  
Data Storage ◽  
Continuous Wavelet Transform ◽  
Continuous Wavelet ◽  
Data Storage Tags

scholarly journals Using data storage tags to link otolith macro- structure in Baltic cod Gadus morhua with environmental conditions

2009 ◽  
Vol 378 ◽  
pp. 161-170 ◽  
Author(s):  
K Hüssy ◽  
B Nielsen ◽  
H Mosegaard ◽  
LW Clausen
Keyword(s):  
Data Storage ◽  
Environmental Conditions ◽  
Gadus Morhua ◽  
Data Storage Tags ◽  
Using Data ◽  
Baltic Cod

scholarly journals Open-ocean orientation and return migration routes of chum salmon based on temperature data from data storage tags

2001 ◽  
Vol 216 ◽  
pp. 235-252 ◽  
Author(s):  
KD Friedland ◽  
RV Walker ◽  
ND Davis ◽  
KW Myers ◽  
GW Boehlert ◽  
...  
Keyword(s):  
Data Storage ◽  
Return Migration ◽  
Chum Salmon ◽  
Temperature Data ◽  
Open Ocean ◽  
Migration Routes ◽  
Data Storage Tags

Introducing a method for extracting horizontal migration patterns from data storage tags

Hydrobiologia ◽  
2007 ◽  
Vol 582 (1) ◽  
pp. 187-197 ◽  
Author(s):  
Bjørn Ådlandsvik ◽  
Geir Huse ◽  
Kathrine Michalsen
Keyword(s):  
Data Storage ◽  
Migration Patterns ◽  
Horizontal Migration ◽  
Data Storage Tags

Spawning behavior in Atlantic cod: analysis by use of data storage tags

2014 ◽  
Vol 506 ◽  
pp. 279-290 ◽  
Author(s):  
TB Grabowski ◽  
V Thorsteinsson ◽  
G Marteinsdóttir
Keyword(s):  
Data Storage ◽  
Atlantic Cod ◽  
Spawning Behavior ◽  
Use Of Data ◽  
Data Storage Tags

scholarly journals Marine feeding areas and vertical movements of Atlantic salmon (Salmo salar) as inferred from recoveries of data storage tags

2015 ◽  
Vol 72 (7) ◽  
pp. 1087-1098 ◽  
Author(s):  
Sigurður Guðjónsson ◽  
Sigurður Már Einarsson ◽  
Ingi Rúnar Jónsson ◽  
Jóhannes Guðbrandsson
Keyword(s):  
Atlantic Salmon ◽  
Data Storage ◽  
Salmo Salar ◽  
Sea Surface ◽  
Vertical Movements ◽  
Atlantic Salmon Salmo Salar ◽  
Irminger Sea ◽  
Data Storage Tags ◽  
Solar Noon ◽  
Diurnal Behavior

We released 598 Atlantic salmon (Salmo salar) hatchery smolts in a river in Iceland in 2005 and 2006 tagged with data storage tags recording temperature and (depth) continuously. Five salmon returned in 2006 and two in 2007, all spending 1 year at sea. The complete temperature and depth profiles of the whole ocean migration were measured. The salmon stayed close to the surface most of the time and showed diurnal behavior, staying at slightly deeper waters during day. The salmon were in temperatures from 6 to 15 °C, with warmer temperatures in the summer. We compared the fish-recorded temperature with sea surface temperature from an available National Oceanic and Atmospheric Administration database to locate the fish at different times. Utilizing the diurnal behavior of the salmon, we estimated solar noon each day during winter. Sea surface temperatures and diurnal activity were used to estimate daily locations using established Hidden Markov Model for fish geolocation. The salmon in the study stayed southwest of Iceland in the Irminger Sea during the first summer months, but in the fall they moved towards the Faroes Islands and then back to the Irminger Sea where they stayed, until returning to the river. The salmon also took shorter and deeper dives (>100 m) during the latter part of their ocean migration.

scholarly journals Life under pressure: insights from electronic data-storage tags into cod swimbladder function

2007 ◽  
Vol 64 (7) ◽  
pp. 1293-1301 ◽  
Author(s):  
Jeroen van der Kooij ◽  
David Righton ◽  
Espen Strand ◽  
Kathrine Michalsen ◽  
Vilhjalmur Thorsteinsson ◽  
...  
Keyword(s):  
Data Storage ◽  
Gadus Morhua ◽  
Fish Length ◽  
Pressure Reduction ◽  
Electronic Data ◽  
Data Storage Tags ◽  
Rapid Ascent ◽  
Using Data ◽  
Electronic Tagging ◽  
Negatively Buoyant

Abstract van der Kooij, J., Righton, D., Strand, E., Michalsen, K., Thorsteinsson, V., Svedäng, H., Neat, F. C., and Neuenfeldt, S. 2007. Life under pressure: insights from electronic data-storage tags into cod swimbladder function. – ICES Journal of Marine Science. 64: 1293–1301. The behavioural response of cod (Gadus morhua) to sudden pressure reductions was investigated in a large electronic-tagging experiment using data collected from 141 cod tagged in five different areas of the Northeast Atlantic. More than 40% of cod exhibited a characteristic equilibration behaviour after a rapid pressure reduction caused either by capture before tagging, or by pressure reduction during a rapid ascent from the seabed, or when migrating to deeper water. The equilibration allowed the cod to regain demersal residence. The rate of descent averaged 10 m d−1 (ranging from 2 to 23 m d−1) over periods of less than a day to 1 month. Descent rates for cod on the Icelandic shelf were inversely related to fish length, i.e. smaller fish descended more rapidly, findings consistent with results achieved in the past under laboratory conditions. Modelling of swimbladder volume during equilibration suggested that cod were negatively buoyant for most of the time. The results imply that swimbladder functionality is retained after the probable barotrauma that would follow a large and rapid ascent, and that rates of gas exchange into the swimbladder may be naturally variable. These findings have implications for assumptions on discard mortality, the interpretation of cod behaviour, and its impact on biomass estimates obtained from acoustic surveys.

Evidence of spawning skippers in Atlantic cod from data storage tags

2014 ◽  
Vol 156 ◽  
pp. 23-25 ◽  
Author(s):  
Ingibjörg G. Jónsdóttir ◽  
Vilhjalmur Thorsteinsson ◽  
Ólafur K. Pálsson ◽  
Gunnar G. Tómasson ◽  
Christoph Pampoulie
Keyword(s):  
Data Storage ◽  
Atlantic Cod ◽  
Data Storage Tags

scholarly journals In situ tagging of deep-sea redfish: application of an underwater, fish-tagging system

2006 ◽  
Vol 63 (3) ◽  
pp. 523-531 ◽  
Author(s):  
Thorsteinn Sigurdsson ◽  
Vilhjalmur Thorsteinsson ◽  
Leifur Gústafsson
Keyword(s):  
Data Storage ◽  
Deep Sea ◽  
Medium Size ◽  
Marine Research ◽  
Video Cameras ◽  
Data Storage Tags ◽  
Fish Tagging ◽  
Device Manufacturer ◽  
And Control

Abstract We describe a tagging method using underwater-tagging equipment (UTE), developed in collaboration between the Icelandic Marine Research Institute and the marine-device manufacturer STAR–ODDI. The tagging device can be attached to a pelagic or demersal trawl, immediately in front of the codend. Fish that enter the trawl are guided through the UTE, where they enter a tagging chamber to be held, tagged, and then released. The tagging equipment is electronically controlled from the vessel by a computer with a hard-wire, sonar cable link between the ship and the device. The same cable carries signals from four video cameras in the UTE, and a researcher can view images of the fish on a computer screen and control the tagging equipment simultaneously. The motivation for this project is the need to be able to tag fish, in situ, underwater, so avoiding the problem of swimbladder expansion that for physoclists such as redfish precludes conventional tagging. The UTE has been used to tag redfish in the size range 32–52 cm. Other species, such as saithe, have also entered the equipment and have been tagged with success. The tagging equipment could therefore be an alternative for tagging any medium-size roundfish, such as cod, haddock, and saithe, as well as many deep-sea species in their natural environment without subjecting them to the hazardous journey from deep water to the surface. In all, 752 redfish were tagged with the UTE in 2003 and 2004. Of these, 29 (3.9%) have been recaptured, most with reliable information on date, position, and condition at the time of capture. The tags used in 2003 and 2004 were dummy tags identical in size and shape to the external housings of electronic data-storage tags. In 2005, real DSTs were used of the type DST-micro from STAR–ODDI. These will in future provide time-series of ambient temperature and depth.

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