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Effects of spatial distribution of light on prey ingestion of Atlantic halibut larvae
Author(s) -
GULBRANDSEN J.
Publication year - 1996
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1996.tb01441.x
Subject(s) - halibut , hippoglossus hippoglossus , biology , brachionus , pleuronectidae , predation , ingestion , light intensity , population , zoology , fishery , larva , ecology , fish <actinopterygii> , flounder , endocrinology , physics , demography , sociology , optics
The hypothesis that light distribution affects prey distribution and in turn influences prey ingestion was tested on Atlantic halibut larvae Hippoglossus hippoglossus . Low intensity concentrated light produced swarms of Artemia sp., but did not affect the distribution of Brachionus plicatilis . Low intensity diffused light, however, did not create swarms with either prey. As a consequence, halibut larvae ingested more Brachionus than Artemia in concentrated light, but not in diffused light. Due to differences in dry weight between Artemia and Brachionus , ingested biomass values were indistinguishable under the two experimental regimes.The term‘ population ingestion value’ is introduced as an expression for the ingestive capability of the population as a whole.