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- Title
Spatial variability in rockfish (Sebastes spp.) recruitment events in the California Current System.
- Authors
Field, John C.; Ralston, Stephen
- Abstract
A general assumption regarding spatial patterns of recruitment variability is that species with similar early life history characteristics tend to covary in reproductive success over scales of 5001000 km. These assumptions are based on evaluation of recruitments from independent stocks, as few studies have assessed synchrony in recruitment within broadly dispersed stocks over finer spatial scales. We used data on age composition and landings to generate regional time series of recruitment deviations for three species of rockfish in the California Current System (Sebastes goodei, Sebastes entomelas, and Sebastes flavidus). We then used correlation analysis, principal components analysis, and other methods to evaluate the degree of synchrony among recruitment events in these regions. Results show that 51%72% of the year-to-year variability in recruitment is shared coastwide within these species, while a lesser but significant fraction of the variability is associated with finer scale geographic features.
- Subjects
CALIFORNIA; ANIMAL species; STRIPED bass; RECRUITMENT (Population biology); STATISTICAL correlation
- Publication
Canadian Journal of Fisheries & Aquatic Sciences, 2005, Vol 62, Issue 10, p2199
- ISSN
0706-652X
- Publication type
Article
- DOI
10.1139/F05-134