ISSN:
1573-5133
Schlagwort(e):
Fish
;
Parental cost
;
Biparental care
;
Convict cichlid
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Biologie
Notizen:
Synopsis Parental investment is the cost of providing parental care. The short-term cost of parental care was measured in the biparental substrate nesting cichlid,Cichlasoma nigrofasciatum, by comparing the expected future survival (measured indirectly as energy content of the body), time taken to breed again and, among females, the number of eggs produced at a subsequent spawning of parental and non-parental pairs. In comparison with non-parental pairs, parental pairs took significantly longer to respawn. Body condition and female fecundity were unaffected after a single parental cycle. The effect on parental cost and expenditure of factors likely to stress the parental fish was also investigated. Removing the male parent had no effect on female parental cost. Exposing pairs to potential predators of offspring increased the time taken by pairs to respawn. In parental males, reducing the level of feeding gave rise to a reduction in some care behaviours.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00004923
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