Intraspecific variation in competitive ability and food intake in salmonids: consequences for energy budgets and growth rates

by: NB Metcalfe

Journal of Fish Biology, Vol. 28, No. 5. (1986), pp. 525-531.

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Abstract

The interactions between dominance status, feeding rate and growth in rainbow trout, Salmo gairdneri Richardson, were analyzed using published data on experimental populations. There was a positive correlation between metabolic expenditure and food intake in both dominant and subordinate fish, but dominants obtained a greater intake for a given expenditure than did subordinates. Subordinates that adopted a high-return/high-cost foraging strategy actually expended more energy than they acquired, whereas those that minimized energy expenditure obtained a net energy gain. This led to the surprising finding that the growth rate of subordinates was negatively correlated with food intake.

@article{citeulike:2798517, abstract = {The interactions between dominance status, feeding rate and growth in rainbow trout, Salmo gairdneri Richardson, were analyzed using published data on experimental populations. There was a positive correlation between metabolic expenditure and food intake in both dominant and subordinate fish, but dominants obtained a greater intake for a given expenditure than did subordinates. Subordinates that adopted a high-return/high-cost foraging strategy actually expended more energy than they acquired, whereas those that minimized energy expenditure obtained a net energy gain. This led to the surprising finding that the growth rate of subordinates was negatively correlated with food intake.}, author = {Metcalfe, N. B. }, citeulike-article-id = {2798517}, doi = {http://dx.doi.org/10.1111/j.1095-8649.1986.tb05190.x}, journal = {Journal of Fish Biology}, keywords = {foraging, salmon, salmonid, status}, number = {5}, pages = {525--531}, posted-at = {2008-05-14 13:57:55}, priority = {2}, title = {Intraspecific variation in competitive ability and food intake in salmonids: consequences for energy budgets and growth rates}, url = {http://dx.doi.org/10.1111/j.1095-8649.1986.tb05190.x}, volume = {28}, year = {1986} }

RIS record

TY - JOUR ID - citeulike:2798517 L3 - citeulike-article-id:2798517 TI - Intraspecific variation in competitive ability and food intake in salmonids: consequences for energy budgets and growth rates JF - Journal of Fish Biology VL - 28 IS - 5 SP - 525 EP - 531 N2 - The interactions between dominance status, feeding rate and growth in rainbow trout, Salmo gairdneri Richardson, were analyzed using published data on experimental populations. There was a positive correlation between metabolic expenditure and food intake in both dominant and subordinate fish, but dominants obtained a greater intake for a given expenditure than did subordinates. Subordinates that adopted a high-return/high-cost foraging strategy actually expended more energy than they acquired, whereas those that minimized energy expenditure obtained a net energy gain. This led to the surprising finding that the growth rate of subordinates was negatively correlated with food intake. KW - foraging KW - salmon KW - salmonid KW - status AU - Metcalfe, NB PY - 1986/// UR - http://dx.doi.org/10.1111/j.1095-8649.1986.tb05190.x ER -

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