Data/hora: 20/06/2024 11:07:46

Biblioteca(s): | Embrapa Pantanal.
Data corrente: | 10/05/1999
Data da última atualização: | 10/05/1999
Autoria: | KRAMER, D. L.
Afiliação: | Department of Biology, McGill University, Canada.
Título: | Dissolved oxygen and fish behavior.
Ano de publicação: | 1987
Fonte/Imprenta: | Environmental Biology of Fishes, v.18, n.2, p.81-92, 1987.
Idioma: | Inglês
Conteúdo: | This essay review the behavioral responses of fish to reduced levels of dissolved oxygen from the perspective of optimization theory used in contemporary behavioral ecology. A consideration of oxygen as a resource suggests that net oxygen gain per unit of energy expenditure will be the most useful currency for ecological models of breathing. In the process of oxygen uptake, fish always expend energy on perfusion, usually on ventilation and often on locomotion. These costs, and the risk of predation, will vary with oxygen availability and the type of behavioral responde shown. The principal categories of behavioral response to reduced external availability of dissolved oxygen are (1) changes in activity, (2) increased use of air breathing, (3) increased use of aquatic surface respiration, and (4) vertical or horizontal habitat changes. Fish should choose whichever combination of responses minimizes the costs of meeting their oxygen demands. A small number of studies provides qualitative support for this prediction.
Palavras-Chave: | Comportamento.
Thesagro: | Peixe.
Thesaurus Nal: | behavior; fish.
Categoria do assunto: | --
Registro original: | Embrapa Pantanal (CPAP)
Exemplares: | CPAP - (38708-1) - ADC - SP - -- - SP4939 -  - 4939 - DIS