Food and feeding habits and length“weight relationship of Parachanna obscura from Federal University of Agriculture Reservoir Abeokuta Ogun State Nigeria

Adeosun Festus Idowu, . Food and feeding habits and length“weight relationship of Parachanna obscura from Federal University of Agriculture Reservoir Abeokuta Ogun State Nigeria. pp. 1139-1150. ISSN 1511-3701

Population increase indiscriminate fishing and others threatening extinction of wild fish species is a major problems in Nigeria fishery. Hence the food and feeding habits and quality of Parachanna obscura from Federal University of Agriculture Abeokuta (FUNAAB) Reservoir were investigated between the months of March and August 2015. Food materials in fish stomach were analyzed using standard methods while length and weight were obtained using standard measures. A total of 11 food categories were observed in the stomach of fish sample during the study period 2 0.28 0.09 0.32 and 29 were empty one-quarter full half full three-quarter full and full respectively. 8.33 and 5.71 vacuity was experienced in the months of July and August respectively. Total lengths of P. obscura ranged from 12 27 cm with a mean of 17.62 0.27 cm while the weights ranged from 43 198 g with a mean of 102.63 4.32 g. The highest abundance of specimens were observed in August (35) followed by July (24) with the lowest observed in March (6) April (8) May (12) and June (15). Linear regression of the analyzed data resulted in length exponent b of 2.45 while a was ‚„1.16 and r 0.88. Approximately 78 of the variance in body weights can be explained by total lengths (r2 0.78). Condition factor ranged between 0.70 and 2.49 with a mean of 1.48 0.51. The study confirms the carnivorous nature of P. obscura from this water. Also findings will assist fisheries managers in making fisheries policy regarding appropriate time for fishing of the species.

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Abstract

Population increase indiscriminate fishing and others threatening extinction of wild fish species is a major problems in Nigeria fishery. Hence the food and feeding habits and quality of Parachanna obscura from Federal University of Agriculture Abeokuta (FUNAAB) Reservoir were investigated between the months of March and August 2015. Food materials in fish stomach were analyzed using standard methods while length and weight were obtained using standard measures. A total of 11 food categories were observed in the stomach of fish sample during the study period 2 0.28 0.09 0.32 and 29 were empty one-quarter full half full three-quarter full and full respectively. 8.33 and 5.71 vacuity was experienced in the months of July and August respectively. Total lengths of P. obscura ranged from 12 27 cm with a mean of 17.62 0.27 cm while the weights ranged from 43 198 g with a mean of 102.63 4.32 g. The highest abundance of specimens were observed in August (35) followed by July (24) with the lowest observed in March (6) April (8) May (12) and June (15). Linear regression of the analyzed data resulted in length exponent b of 2.45 while a was ‚„1.16 and r 0.88. Approximately 78 of the variance in body weights can be explained by total lengths (r2 0.78). Condition factor ranged between 0.70 and 2.49 with a mean of 1.48 0.51. The study confirms the carnivorous nature of P. obscura from this water. Also findings will assist fisheries managers in making fisheries policy regarding appropriate time for fishing of the species.

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Item Type:	Article
AGROVOC Term:	Carnivorous animals
AGROVOC Term:	Fishes
AGROVOC Term:	Wildlife
AGROVOC Term:	Weight
AGROVOC Term:	Length
AGROVOC Term:	Animal feeding
AGROVOC Term:	Feeding habits
AGROVOC Term:	Diet treatment
AGROVOC Term:	Aquaculture
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:29
URI:	http://webagris.upm.edu.my/id/eprint/24806

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