Geolocation of free-ranging fish on the European continental shelf as determined from environmental variables

Hunter, Ewan; Aldridge, John; Metcalfe, Julian D.; Arnold, G. P.

doi:10.1007/s00227-002-0984-5

Cited by 71 publications

(99 citation statements)

References 30 publications

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“…Estimates of tidal range and time of high water were filtered to obtain the most accurate daily estimate (based on least sum of squares). These data were then used in the tidal location method (TLM: Hunter et al 2003 …”

Section: Methodsmentioning

confidence: 99%

“…pressure), tidal signals and temperature (e.g. Hunter et al 2003), the migratory movements of individual fish can be mapped from retrieved tags. The purpose of our study was to examine -using observational data on migratory behaviour -the following 2 hypotheses: (1) that the cod population in the eastern North Sea region comprises a mixture of resident and migratory stocks (Munk et al 1999, Knutsen et al 2004, Svedäng & Svenson 2006; (2) that if natal homing is a part of the behavioural repertoire of cod, recorded movements should be directional and related to spawning locations.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Migratory behaviour of Atlantic cod Gadus morhua: natal homing is the prime stock-separating mechanism

Svedäng¹,

Righton²,

Jönsson³

2007

Mar. Ecol. Prog. Ser.

143

118

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Migratory behaviour of Atlantic cod Gadus morhua: natal homing is the prime stock-separating mechanism

Svedäng¹,

Righton²,

Jönsson³

2007

Mar. Ecol. Prog. Ser.

143

118

View full text Add to dashboard Cite

show abstract

“…crepuscular diving, preference for turbid water, or non-migratory behaviour). It has, however, been possible to use TDR data, alongside environmental data, to reconstruct the migratory routes of freeranging fish species (Metcalfe & Arnold 1997, Hunter et al 2003, Hunter et al 2006, Righton & Mills 2008.…”

Section: Open Pen Access Ccessmentioning

confidence: 99%

Inferring vertical and horizontal movements of juvenile marine turtles from time-depth recorders

Witt¹,

McGowan²,

Blumenthal³

et al. 2010

Aquat. Biol.

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“…Tidal cycle information has also previously been used for estimating geolocations. Hunter et al (2003Hunter et al ( , 2004Hunter et al ( , 2006 used depth data recorded by demersal fish to determine the tidal phase and compared the tidal database to identify possible geolocations. For non-demersal fish, cyclic salinity phase might be a good candidate for determining tidal phase.…”

Section: Discussionmentioning

confidence: 99%

Salinity measurements from pop-up archival transmitting (PAT) tags and their application to geolocation estimation for Atlantic tarpon

Luo

Ault²,

Larkin

et al. 2008

Mar. Ecol. Prog. Ser.

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A new wet/dry sensor was developed by the satellite-based pop-up archival transmitting (PAT) tag manufacturer to determine the wet and dry status of a tag, designed to indicate whether or not to initiate uplink transmissions to overhead satellites to extend tag battery life. We discovered that the wet/dry sensor can also be used to measure the salinity of coastal waters after we recovered a PAT tag showing oscillating readings of wet/dry sensor values that mimicked tidal cycles. We conducted a calibration experiment on 6 PAT tags to evaluate the stability, resolution, and accuracy of the sensor to obtain salinity measurements. Our results indicated that the wet/dry sensor was stable, and the resolution and accuracy of the sensor were good at low salinities (< 20 psu), but relatively poor at high salinities. We then provide an example showing how the salinity information can be used to improve geolocation estimation for a large coastal marine fish, the Atlantic tarpon Megalops atlanticus. KEY WORDS: Salinity · PAT tags · Wet/dry sensor · Geolocation · Atlantic tarpon Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 357: [101][102][103][104][105][106][107][108][109] 2008 poor, due to the relatively high turbidity of coastal ocean waters. In 2006, we initiated use of a new generation of MK-10 PAT tags, manufactured by Wildlife Computers (www.wildlifecomputers.com) and equipped with a wet/dry sensor. In the course of our studies, we noted some interesting features of the recorded wet/dry sensor values that we obtained from a recovered PAT tag (Fig. 1b). We suspected that the variations of wet/dry sensor values were related to the salinity of the coastal ocean environment that the tarpon experienced during movements and migrations. Therefore, we conducted an experiment to calibrate empirical wet/dry sensor values recorded by the tag and compared these to precise salinity measurements obtained from a CTD instrument. In this article, we present the results from those experiments and discuss the potential usefulness of the salinity measurements in both refining light-level geolocation estimates and defining habitat utilization patterns for coastal fishes. MATERIALS AND METHODS Pop-up archival transmitting (PAT) tag.The PAT tag is designed to be attached to a study animal via a tether (Fig. 2). It collects data during the deployment period, and then at a pre-set date and time it pops up (releases from the study animal) and transmits archived data via the Argos satellite system. The PAT tag used in the present study is a new product (MK10) from Wildlife Computers with a new wet/dry sensor, and detailed technical specifications for the tag can be found at www. wildlifecomputers.com. The new wet/dry sensor located at the base of the antenna provides 8-bit analogto-digital conversion for measuring resistance between the sensor and the base metal ring positioned below the float, which determines the wet and/or dry (i.e. in/out of water) status of the tag. Outputs rel...

show abstract

Geolocation of free-ranging fish on the European continental shelf as determined from environmental variables

Cited by 71 publications

References 30 publications

Migratory behaviour of Atlantic cod Gadus morhua: natal homing is the prime stock-separating mechanism

Migratory behaviour of Atlantic cod Gadus morhua: natal homing is the prime stock-separating mechanism

Inferring vertical and horizontal movements of juvenile marine turtles from time-depth recorders

Salinity measurements from pop-up archival transmitting (PAT) tags and their application to geolocation estimation for Atlantic tarpon

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