Large females connect Atlantic cod spawning sites

• Main Authors: Olsen, Esben, Karlsen, Orjan, Skjæraasen, Jon
• Format: Software
• Language: unknown
• Published: 2023
• Subjects: Atlantic cod; acoustic telemetry; movement behaviour; Body size; atlantic cod; Gadus morhua
• Online Access: https://zenodo.org/record/8400789; https://doi.org/10.5281/zenodo.8400789

In this study, we used acoustic telemetry to monitor the movements of mature Atlantic cod (Gadus morhua) during the winter spawining season. The fish were captured in traps with the help of a local fisher, and released near their point of capture after tagging and body size measurements. Fish detection data were downloaded from the moored receivers twice per year, before and after the spawning season. The acoustic receivers were distributed among several known inshore spawning grounds, and we used network analyses to quantify how individual cod moved at a finer and broader scale among these sites. Movement traits representing connectivity were used as response variables in the statistical analyses, while body size measurements, residency (time spent within the array), tagging location and year, were tried as predictors. Funding provided by: Norges ForskningsrådCrossref Funder Registry ID: http://dx.doi.org/10.13039/501100005416Award Number: 294926Funding provided by: Fiskeri - og havbruksnæringens forskningsfondCrossref Funder Registry ID: http://dx.doi.org/10.13039/501100010197Award Number: 901230 The data sets were collected east of the Smøla archipelago in mid-Norway during 2017 - 2019. Details for each dataset are provided in the README file. Data sets included: 1) Atlantic cod captures in traps · Individual tags used · Body size measurements of tagged cod · Information about sex, maturity stage, location and year of capture and release 2) Acoustic telemetry receiver array · Position and depth of deployed acoustic receivers 3) Individual cod detection files · Time stamp and location (receiver) for each detection · Sensor values (depth) for each detection 4) Cod movement data · Summary of network analyses conducted on individual cod detection data 5) Map data · Coastline coordinates needed for mapping fish movements. Missing values are denoted by empty cells. Additional details are available in the README file.