Some aspects of the reproductive biology of perch Perca fluviatilis L. Fecundity, maturation and spawning behaviour
1981; Wiley; Volume: 18; Issue: 6 Linguagem: Inglês
10.1111/j.1095-8649.1981.tb03814.x
ISSN1095-8649
Autores Tópico(s)Marine and fisheries research
ResumoFecundity of perch estimated from a regression of egg. number on fish length varied from 6711 for a fish of 14.5 cm to 77978 for a female of 34. 5 cm. Other independent variables related to egg number were age, gonad weight and somatic weight. Mean egg diameter varied from 0.94 to 1.62 mm. Males matured in their second year at a length of 6 cm and above while all females spawned at age four at a length of 15–18 cm. A proportion of females at Davan spawned one year earlier than at Kinord and were also slightly smaller on spawning. Faster growth of Davan fish may have encouraged earlier maturation. Spawning behaviour is described from film material.
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