Comparative trophodynamics of anchovy Engraulis encrasicolus and sardine Sardinops sagax in the southern Benguela: are species alternations between small pelagic fish trophodynamically mediated?

The results of detailed morphological, experimental, field and modelling studies on various aspects of the trophic ecology of sardine Sardinops sagax and anchovy Engraulis encrasicolus in the Benguela ecosystem are synthesised, and differences in the trophodynamics of these two species are highlight...

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Bibliographic Details
Published in:African journal of marine science 2006-11, Vol.28 (3-4), p.465-477
Main Authors: van der Lingen, CD, Hutchings, L, Field, JG
Format: Article
Language:English
Subjects:
ANCHOVY
Engraulis encrasicolus
Marine
SARDINE
Sardinops sagax
SOUTHERN BENGUELA
SPECIES ALTERNATIONS
TROPHODYNAMICS
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Summary:The results of detailed morphological, experimental, field and modelling studies on various aspects of the trophic ecology of sardine Sardinops sagax and anchovy Engraulis encrasicolus in the Benguela ecosystem are synthesised, and differences in the trophodynamics of these two species are highlighted. Anchovy possess a relatively coarse branchial apparatus; feed predominantly by particulate-feeding and maximise their net energetic gain by using this feeding mode; show higher weight-standardised clearance rates than do sardine for prey >580µm; are most efficient at assimilating nitrogen from zooplankton and excrete
ISSN:1814-232X
1814-2338
DOI:10.2989/18142320609504199