SOME ASPECTS OF THE BIOLOGY OF Parachanna obscura IN ITAPAJI DAM, EKITI STATE, NIGERIA.
DOI:
https://doi.org/10.33003/jaat.2024.1003.04Keywords:
Parachanna obscura,, Itapaji dam,, Gonado-somatic index,, Hepato-somatic indexAbstract
Some aspects of the biology of Parachanna obscura were studied in Itapaji dam in Ekiti State Nigeria. Fish specimens were collected monthly from the dam’s landing site from March to August 2021. The Standard Length (SL), Total Length (TL), and Body Weight (BW) were measured respectively. The sex ratio was determined and did not depart from the 1:1 population of the stock. The condition factor (K) calculated was less than 1 which indicated P. obscura is not in a good physiological state. The length-weight relationship (b-values) for combined sexes was 2.96 and indicated a negative allometric growth pattern in Itapaji reservoir. The frequency of occurrence of food items consumed showed that 13% had detritus and fish, 18.8% had earthworms and fish, 6.5% had prawns and fish, 5% had prawns, fish and snail shells, and 4% had earthworms and fish. Food items of primary importance were fishes, prawns, nematodes, and detritus. The minimum and maximum Gonado-somatic indexes were 0.18% and 0.79% respectively while the minimum and maximum hepato-somatic indexes were 0.22% and 0.62% respectively.
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