Effects of some environmental factors on the fecundity of Tilapia species (Family Cichlidae) in Kigera Reservoir, New Bussa

Issa, E.A. and Olufeagba, S.O. and Raji, A. (2005) Effects of some environmental factors on the fecundity of Tilapia species (Family Cichlidae) in Kigera Reservoir, New Bussa. In: 19th Annual Conference of the Fisheries Society of Nigeria (FISON) , 29 Nov - 03 Dec 2004 ,Ilorin, Nigeria, pp. 861-868.

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Abstract

The effects of some environmental factors on the fecundity of Tilapia species (Family Cichilidae) was carried out at the Kigera dam. Four Tilapia species caught were Tilapia zilli, Hemichromis fasciatus, Sarotherodon galilaeus and Oreochromis niloticus while the environmental factors considered were water temperature, Dissolved Oxygen, pH value, level of rainfall and rate of sunshine and range of time. 43 fish comprising of 25 male with (58.1%) and 18 females having (41.9%) were studied with 74.42% been sexually matured. Both high levels of rainfall and dissolved oxygen favoured fecundity. The spawning peak occurred in (July), environmental factors monitored indicated that dissolved oxygen ranges from 3.7 to 4.45mg/lit rainfall ranges from (34.90mm to 237.80mm) sunshine ranges from (5hrs-8hrs) and pH ranges from (7.35-7.45). The spawning of these species in their natural or hatchery condition is therefore best achieved during the peak of raining season

Item Type: Conference or Workshop Item
Title: Effects of some environmental factors on the fecundity of Tilapia species (Family Cichlidae) in Kigera Reservoir, New Bussa
Personal Creator/Author:
CreatorsEmail
Issa, E.A.
Olufeagba, S.O.
Raji, A.
Page Range: pp. 861-868
Date: 2005
Event Title: 19th Annual Conference of the Fisheries Society of Nigeria (FISON)
Event Type: Conference
Event Location: Ilorin, Nigeria
Event Dates: 29 Nov - 03 Dec 2004
Issuing Agency: Fisheries Society of Nigeria
Uncontrolled Keywords: Nigeria, Lake Kainji; dissolved oxygen; environmental factors; fecundity; freshwater fish; rainfall; sexual reproduction; solar radiation; spawning; temperature effects; Cichlidae; Hemichromis fasciatus; Oreochromis; Sarotherodon; Tilapia
Subjects: Fisheries
Biology
Environment
Item ID: 4130
Depositing User: Ms Maria Kalentsits
Date Deposited: 31 Aug 2010 13:08
Last Modified: 29 Sep 2011 16:24
URI: http://aquaticcommons.org/id/eprint/4130

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