Age-specific natural mortality rates of adult Pacific herring (Clupea pallasi) from southern British Columbia

Authors
Tanasichuk, RW
Citation
Rw. Tanasichuk, Age-specific natural mortality rates of adult Pacific herring (Clupea pallasi) from southern British Columbia, CAN J FISH, 57(11), 2000, pp. 2258-2266
Citations number
27
Categorie Soggetti
Aquatic Sciences
Journal title
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
ISSN journal
0706652X → ACNP
Volume
57
Issue
11
Year of publication
2000
Pages
2258 - 2266
Database
ISI
SICI code
0706-652X(200011)57:11<2258:ANMROA>2.0.ZU;2-X
Abstract
I used data for over 665 000 Pacific herring (Clupea pallasi) seined or gil lnetted in southern British Columbia between 1951 and 1998 to estimate age- and year-specific adult natural mortality rates. Apparent sampling bias pr ecluded using data collected before 1980. The instantaneous natural mortali ty rate is an increasing exponential function of age. Surplus energy requir ements for gonad recrudescence appear to cause the death of adult herring.