Large females connect Atlantic cod spawning sites

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.