Abstract
Abstract This paper discusses the effects of deep water renewal, and stagnation on the demography of a stock of Pandalus borealis in Gullmarsfjorden, a fjord with shallow sill on the Swedish west coast. It is based on data extracted from a four year series (1984-1987) of trawl samples obtained at approximately monthly intervals. During deep water stagnation the fjord contains true, albeit shortlived (8-12 months) populations/demes of P. borealis. Differences in catch per unit effort, and length frequency distributions after deep-water renewal in the fjord indicate that new demographic patterns were created by immigration of older shrimp and by varying recruitment of new year classes. Immigration is most likely facilitated by strong advective flows over the sill area during water renewal coinciding with the winter-spring onshore migration of shrimp in the Skagerrak. The well defined nature of the stagnation populations suggests that the fjord system may be well suited for the study of population processes ...
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.