Fecundity and Gonadal Development of the Frillfin Goby, Bathygobius soporator ( Valenciennes, 1837) from the Cross River Estuary, Nigeria
Journal Title: International Journal of Scientific Research and Management - Year 2013, Vol 1, Issue 9
Abstract
Fecundity and gonadal development of the Frillfin Goby, Bathygobius soporator from the Cross River Estuary, Nigeria was studied from July 2012 to June 2013. A total of 210 gravid female fish were examined during this period. The resu lts show that fecundity ranged between 5462 eggs for fish of Total Length (TL - cm) 12.4cm, Total Weight (TW - g) 25.0g, Gonad Weight (GW - g) 0.5g, and Mean Egg Diameter (MED - mm) 0.45mm to 63250 eggs for fish of Total Length (TL - cm) 12.9cm, Total Weight (TW - g) 45.0g, Gonad Weight (GW - g) 3.0g, and Mean Egg Diameter (MED - mm) 0.44mm. Gonadosomatic index (GSI) ranged between 1.22% for fish of Total Length (TL - cm) 14.4cm, Total Weight (TW - g) 41.0g and Gonad Weight (GW - g) 0.5g 13.48% for fish of Total Length (TL - cm) 1 2.3cm, Total Weight (TW - g) 23.0g and Gonad Weight (GW - g) 3.1g. there was a positive significant relationship between fecundity and Total length, total weight, Gonad weight and a positive non - significant relationship between fecundity and mean egg diameter as follows: F = 856.6TL 1.1654 (r = 0.2938 and r 2 = 0.0863, P<0.05), F = 4587.1TW 1.1654 (r = 0.2960 and r 2 = 0.0876, P<0.05), F = 13863MED 1.1654 (r = 0.010 and r 2 = 0.0001, P>0.05) and F = 13863MED 1.1654 (r = 0.010 and r 2 = 0.0001, P>0.05). Histological sec tions of the ovaries of B. soporator showed six stages of oocyte development (virgin, maturing virgin, developing, ripened, spawning and spent). This finding is useful in formulating management strategies for B. soporator fishery which is a valuable fish i n the Cross River estuary
Authors and Affiliations
V. O Eyo
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