Acute toxicity of water extracts of bark of the neem plant, Azadirachta indica [Lodd] to the cichlid, Tilapia zilli [Gervais]

• Autorzy: Omoregie E , Okpanachi M.A.
• Języki publikacji: EN

Abstrakty

EN

The effects of the extract on the mortality rate, opercular ventilation rate and some behavioural responses of T. zilli were investigated under laboratory conditions, over a 96 h exposure period. The 96 h LC50 was determined as 6.03 mg L-1. The extract led to an initial increase in the opercular ventilation rates which then decreased significantly (P<0.05). Prior to death, darkening of the exposed fish, erratic swimming, and respiratory distress were observed. The implication of these findings in relation to environmental pollution is discussed.

PL

W warunkach laboratoryjnych badano wpływ ekstraktu na poziom śmiertelności, tempo ruchów oddechowych i zachowanie T. zilli w czasie 96 h ekspozycji. Określono 96 h LC50 na 6.03 mg L-1. Działanie ekstraktu spowodowało początkowy wzrost tempa wentylacji, które następnie zmniejszyło się istotnie (P<0.05). Śmierć poprzedzało ciemnienie ubarwienia eksponowanych ryb, chaotyczne ruchy i upośledzenie oddychania. Uzyskane wyniki omówiono w kontekście skażenia środowiska.

Słowa kluczowe

EN

environment pollution; neem plant; toxicity; Tilapia zilli; acute toxicity; bark; cichlid; pollutant; aquatic environment; Azadirachta indica; water extract

• Wydawca: -
• Czasopismo: Acta Hydrobiologica
• Rocznik: 1997
• Tom: 39
• Numer: 1-2
• Opis fizyczny: p.47-51,ref.

Twórcy

autor

Omoregie E

• University of Jos, P.M.B. 2084, Jos, Nigeria

autor

Okpanachi M.A.

Bibliografia

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