BEHAVIOURAL RESPONSES OF AFRICAN CATFISH ( Clarias gariepinus BURCHELL, 1822) JUVENILES EXPOSED TO ACUTE CONCENTRATIONS OF BUTACHLOR (HERBICIDE)

Autor:	A. B. Dauda, A. M. Salim, M. A. Yusuf
Rok vydání:	2021
Předmět:	Clarias gariepinus chemistry.chemical_compound Animal science biology chemistry Breathing Jerky movements Fish biology.organism_classification Butachlor Catfish
Zdroj:	FUDMA JOURNAL OF SCIENCES. 5:472-476
ISSN:	2616-1370 2645-2944
DOI:	10.33003/fjs-2021-0501-592
Popis:	This study examined the behavioral changes induced by butachlor to the juveniles of Clarias gariepinus. The experiment consists of five treatments (0.6, 0.7, 0.8, 0.9 and 1.0 mg/l) and a control. Ten fishes were allotted in each test tank in duplicates. Observations on behavioral responses were made at 0, 12, 24, 48, 72 and 96 hours post-exposure. The opercular movement and tail fin beat rates were observed as counts per minute using a stopwatch. The behavioral patterns of the fish in the control group were normal, whereas in the exposed groups the fish tend to lose equilibrium and swim erratically with vigorous jerky movements. At the 12th and 24th hours the fish in the exposed groups showed hyper-active movement, but became hypoactive at the 48th hour. The mean values of the tail fin beat of the exposed groups were significantly higher (p
Databáze:	OpenAIRE
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