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Growth of Juvenile Lake Sturgeon Reared in Tanks at Three Densities
Author(s) -
Fajfer Steve,
Meyers Lee,
Willman Guy,
Carpenter Terry,
Hansen Michael J.
Publication year - 1999
Publication title -
north american journal of aquaculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.432
H-Index - 41
eISSN - 1548-8454
pISSN - 1522-2055
DOI - 10.1577/1548-8454(1999)061<0331:gojlsr>2.0.co;2
Subject(s) - lake sturgeon , biology , juvenile , brine shrimp , acipenser , zoology , stocking , fishery , body weight , shrimp , juvenile fish , larva , sturgeon , weight gain , fish <actinopterygii> , ecology , endocrinology
Juvenile (106‐d‐old) lake sturgeon Acipenser fulvescens were reared at three densities, 150, 300, and 450 fish/m 2 (1.35, 2.5, and 3.75 kg/m 2 ), for 5 weeks to determine if rearing density affected growth. Feeding rates of fish fed on chironomid larvae (72%, wet weight), brine shrimp Artemia sp. (8%), and euphausiids (krill, 20%) ranged from 15% to 34% body weight per day and varied with water temperature and diet. Food conversion (weight of food fed/weight gained) averaged 7.2 during the 5 weeks. Juvenile lake sturgeon increased in mean length from 127 to 169 mm (33%) and in mean weight from 8.5 to 21.1 g (147%). However, changes in length and weight did not differ significantly among the three rearing densities, and patterns of change in length and weight were consistent among the three rearing densities. We conclude that rearing densities of 150‐450 fish/m 2 (1.35‐3.75 kg/m 2 ) are equally acceptable for rearing lake sturgeon for stocking.