Large scale pattern of recruitment by the labrid, Semicossyphus pulcher: causes and implications.

R. K. Cowen

Research output: Contribution to journalArticle

139 Scopus citations

Abstract

In areas with larval sources to the north and south, recruitment occurred consistently from year-to-year, but in areas where there was no larval sources 'upstream' of the typical current direction, recruitment was highly variable and dependent upon anomalous events in the current flow. These anomalous events are considered on 2 levels: low-level events, which last from days to weeks, thereby affecting recruitment of only one or a few species, and high-level events, which last from months to years (eg El Nino events), affecting recruitment of many species. A positive relationship is found between frequency of recruitment events and density of adult populations. Also, the persistence of populations is dependent upon recruitment frequency and the longevity of the individuals. The interaction between recruitment frequency, population density and persistence is considered to be important in determining the northern distribution limit of sheephead at Point Conception (also a major break for many other species). This faunal break is heavily influenced by hydrographic constraints on dispersal.-from Author

Original languageEnglish (US)
Pages (from-to)719-742
Number of pages24
JournalJournal of Marine Research
Volume43
Issue number3
DOIs
StatePublished - Jan 1 1985

ASJC Scopus subject areas

  • Oceanography

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