Social control of developmental rate in the african cichlid haplochromis burtoni

Fraley, N.B.; Fernald, R.D.

Zeitschrift fuer Tierpsychologie 60(1): 66-82

1982


DOI: 10.1111/j.1439-0310.1982.tb01077.x
Accession: 006429845

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Abstract
Social regulation of developmental rate of the African cichlid fish, H. burtoni, was studied experimentally. Broods were raised under 3 different social conditions: total isolation, with no visual, physical or chemical contact with siblings; physical isolation, with no physical or chemical contact with siblings; and in social groups. Development of behavior and color patterns was observed in fish from 2-14 wk of age. Males were sacrificed at 4-wk intervals to measure growth and maturation state. Developmental rate was influenced by the social environment. Males with no territories (raised in groups) grew and matured more slowly than those in all other conditions. These males were not prevented from maturing but both the rate and phenotypic expression of maturation were inhibited.

Social control of developmental rate in the african cichlid haplochromis burtoni