RELATIONSHIP BETWEEN FECUNDITY AND BIOMETRIC INDICES OF THE SILVER CATFISH Chrysichthys nigrodigitatus (Lacepede) IN THE CROSS RIVER ESTUARY, NIGERIA

The effects of Brazilian tea (Stachytarpheta jamaicensis) and Bitter kola (Garcinia kola) seed meal on the growth and gonad development of the African catfish Clarias gariepinus (Burchell, 1822)

“…Each specimen was cut-opened through the anus. Eggs were removed and washed in distilled water and weighed using Metlar-2000D electronic weighing balance to the nearest 0.1 g (Eyo et al 2013). The eggs were fixed in Gilson fluid (17 ml, Nitric acid, 4 ml Glacial acetic acid, 20 g mercuric chloride, 95 % ethanol and 900 ml distilled water) in order to harden the egg and loosen the tissues surrounding the eggs.…”

“…The diameters of 30 eggs per fish were measured according to Eyo et al (2013) using a stereo microscope with a micrometer ocular eye piece.…”

“…Also, its affordability and richness in nutrients required for good health and growth such as omega-3-fatty acid, phosphorus, thiamine, riboflavin, vitamins A and D, calcium, and iron increases its consumption rate in Nigeria (Eyo and Ekanem, 2011;Eyo et al 2013). Among fish species cultured in Nigeria, C. gariepinus remains the most cultivated species which is ascribed to several favorable characteristics exhibited by this species.…”

Fecundity and Egg Size of Clarias Gariepinus in Pandam Lake, Quan-Pan L.G.A.Plateau State, Nigeria

“…Under controlled conditions, attempts are made to obtain the highest possible numbers of good quality hatchlings (Brzuska, 2003). Fecundity is an index which measures the number of eggs carried by a gravid female fish or shrimp (Eyo et al, 2013). Knowledge of the fecundity of fishes is important for the comprehension of their life history (King, 1997).…”

Fecundity studies of the African catfish Clarias gariepinus (Burchell, 1822) fed Coppens feed and Unical aqua feed in circular concrete tanks

“…This has led to the search for alternative and cheaper fish feed that will supply all the nutrients required by fish for optimal growth. Fecundity is an index which measures the number of eggs carried by a gravid female fish or shrimp [3]. During selection of species for aquaculture, fecundity is one of the important characteristics considered by scientists [4].…”