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Effects of light administration and algae on first feeding of Atlantic halibut larvae, Hippoglossus hippoglossus (L.)
Author(s) -
Gulbrandsen J,
I Lein,
Holmefjord I
Publication year - 1996
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.1996.tb00973.x
Subject(s) - hippoglossus hippoglossus , halibut , biology , algae , light intensity , tetraselmis , larva , fishery , zoology , botany , fish <actinopterygii> , physics , optics
The aim of the study was to investigate the effects of two light regimes that independently had shown positive effects on feeding and growth in cultures of Atlantic halibut, Hippoglossus hippoglossus (L.), larvae. The regimes were low‐intensity overhead light and submerged light at intermediate light intensities. Secondly, an alleged beneficial effect of algae was investigated. An experiment was designed to include four different regimes in the larval cultures: low‐intensity overhead light with and without algae ( Tetraselmis sp.), and submerged light with and without algae. The results showed that submerged light was superior to overhead light with respect to larval growth, survival and feeding incidence. It was further indicated that algae improved larval growth and survival, but no effect was shown on feeding incidence. There was, however, no interaction between the effects of algae and those of the light regime. The causal effect of the algae may be ascribed to indirect factors, such as light attenuation as well as a direct and indirect nutritional effect.