Behavioral and Developmental Plasticity of Buoyancy in the Longnose, Rhinichthys cataractae, and Blacknose, R. atratulus (Cyprinidae) Dace
- 1 January 1974
- journal article
- Published by Canadian Science Publishing in Journal of the Fisheries Research Board of Canada
- Vol. 31 (1) , 35-41
- https://doi.org/10.1139/f74-005
Abstract
The hypothesis that developmental plasticity contributes to variation in swimbladder length, volume, weight of tissue, and buoyancy was examined in two species of dace. At both maximum and minimum buoyancy attained dace reared in still water to adult size possessed swimbladders of a greater length, volume, and weight of tissue than those reared in current. Such developmental plasticity affected the range over which buoyancy could be adjusted (behavioral plasticity). Those reared in still water attained a more buoyant condition than those reared in current while the latter attained a greater degree of negative buoyancy.Keywords
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