Larval distribution, abundance, and stock structure of British Columbia herring
1997; Wiley; Volume: 51; Issue: sA Linguagem: Inglês
10.1111/j.1095-8649.1997.tb06098.x
ISSN1095-8649
Autores Tópico(s)Fish Ecology and Management Studies
ResumoPacific herring Clupea pallasi spawn in shallow and intertidal areas. Larval distributions and abundance of three major and several minor stocks were examined to determine if larvae mix among different spawning locations. The surveys were short, intensive, and occurred mainly within the first 30 days of larval life. Each major stock had a discrete larval distribution with continuous larval distributions within stock boundaries. Some overlap of distributions occurred among smaller stocks. Most larvae were found in inshore waters but there were no obvious oceanographic factors, such as fronts or eddies, to explain all the distributions. Estuarine circulation in inlets could promote larval retention in some areas. The results support the present geographic definitions for local herring stocks. The results are generally consistent with the concept of discrete larval distribution, including retention areas, as the basis for herring Stock Structure.
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