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Contributions to the biology of Sarotherodon melanotheron [ Ruppell, 1851 ] [ Perciformes, Cichlidae ] in the New Calabar River [ Nigeria ]

100%

Nwadiaro C. S., Ayodele R. O. O.

Acta Hydrobiologica

1992

tom 34

nr 3

287-300

Sarotherodon melanotheron had length/weight coefficients of 2.84 (male) and 3.13 (female), suggesting that the allometric and isometric growth condition factors (1.46-2.27) were relatively low. Sex ratio (1:1.9) was just in favour of females. There were five maturity stages with maturity sizes of 10.1 cm (male) and 10.5 cm (female). Fecundity (88-651) increased with weight and cube of length. Egg sizes (1.35-3.45 mm) increased with fecundity, gonad size, and body size. Benthic and phytoplankton feeding are shown.

Ograniczanie wyników

1 Acta Hydrobiologica

1 Ayodele R. O. O.

1 Nwadiaro C. S.

1 1992

Wyniki wyszukiwania

Contributions to the biology of Sarotherodon melanotheron [ Ruppell, 1851 ] [ Perciformes, Cichlidae ] in the New Calabar River [ Nigeria ]