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AB 1:135-139 (2007)  -  DOI:

Effects of haul duration on the physical condition of sprat larvae

A. Dänhardt1,2,*, A. Temming1

1Institute of Marine Ecosystems and Fisheries Science, University of Hamburg, Olbersweg 24, 22767 Hamburg, Germany
2Present address: Institute of Avian Research c/o Research Center Terramare, Schleusenstrasse 1, 26382 Wilhelmshaven, Germany

ABSTRACT: A BIOMOC (BIOlogical Multiple Opening Closing) plankton net was used to collect Baltic sprat Sprattus sprattus larvae at discrete depths of the Bornholm Basin, central Baltic Sea. This stratified sampling regime revealed haul-time-dependent damage of the larvae as defined by the absence/presence of eyes and guts and the overall degree of damage, resulting in significant weight differences between larvae with different degrees of damage. Additionally, long haul durations were found to compromise the retention of gut contents. Our findings suggest revision of current standard catching procedures with respect to the investigation of the feeding ecology and the nutritional condition of larval fish.

KEY WORDS: Baltic · Sprat larvae · Condition · Catch method

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Cite this article as: Dänhardt A, Temming A (2007) Effects of haul duration on the physical condition of sprat larvae. Aquat Biol 1:135-139.

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