Interannual variation of ichthyoplankton composition and abundance relations off northern Chile, 1964-83

Downloaded 163 times.

Primary tabs

Loeb, V. J., & Rojas, O. (1988). Interannual variation of ichthyoplankton composition and abundance relations off northern Chile, 1964-83. Fishery Bulletin, 86(1), 1-24.
PDF
Metadata
TitleInterannual variation of ichthyoplankton composition and abundance relations off northern Chile, 1964-83
AuthorsJ. Loeb, O. Rojas
AbstractThe 19-yr timespan included a wide variety of hydrographic conditions in the Humboldt Current area (cold years, El Nino events, and intervening transition years); it also included the decline and collapse of the anchoveta Engraulis fisheries and increases of sardine Sardinops, mackerel Scomber and jack mackerel Trachurus stocks off northern Chile and Peru. A marked shift in relative abundances of nonfished mesopelagic species in 1969-70 is associated with changes within long-term physical data bases from Chile and Peru suggesting a large-scale environmental change. Sardine stock growth began with successful larval survival of 1968-69 and later year classes. Anchoveta stock decline began in 1972 probably due to poor larval survival. Affiliation of anchoveta and coastal species larval abundance implies that they are similarly influenced by coastal processes. An atmospherically driven oceanic circulation change beginning in the late 1960s and possibly involving onshore presence of subtropical and/or oceanic waters and altered coastal processes may have been responsible for the changes in the northern Chilean fish assemblages.
JournalFishery Bulletin
Date1988
Start page1
End page24
ISSN00900656
SubjectsEl Nino, ichthyoplankton, jack mackerel, mackerel, sardine, Chile, Pacific(Southeast), Humboldt Current, Peru, Engraulis, Sardinops, Scomber, Trachurus
NoteCited By (since 1996):25

Bookmark

Bookmarks: