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Rearing peled [ Coregonus peled Gmel.] larvae in illuminated cages with supplemental utilization of artificial feed

100%

Mamcarz A. , Kozlowski J.

Polskie Archiwum Hydrobiologii

1992

tom 39

nr 3-4

Effect of extreme temperature on egg development larval and adult survival of Chordodes nobilii Camerano, 1901 [Gordiida, Nematomorpha]

84%

Achiorno C. L. , Ferrari L. , De Villalobos C.

Acta Parasitologica

2008

tom 53

nr 4

On the basis of experimental studies we analyzed the effect of extreme temperatures on the aquatic free-living phases of the life cycle of Chordodes nobilii (Gordiida, Nematomorpha). Bioassays were performed with eggs, larvae, and adults. Eggs and larvae were exposed to 3°C below zero and 40.5°C; adults were exposed to 3°C below zero and to 38.5°C and 40.5°C. The results showed that egg development was inhibited in both tests. Exposed larvae showed a decrease in their infective capacity, which resulted almost null at 40.5°C. Adults exposed to 38.5°C showed mortality ≤10%, at 40.5°C the mortality was 100% and the adult’s mortality at 3°C below zero was 89%. Results indicate that free living stages of Chordodes nobilii are susceptible to extreme temperatures.

Fecundity of the mushroom sciarid, Lycoriella solani Winn., females developed from larvae which survived treatment with microbial insecticide, Vectobac 12AS

84%

Lewandowski M. , Ignatowicz S.

Pestycydy

1998

nr 2-3

Effects of copper and cadmium on growth and yolk utilization in barbel [Barbus barbus L.] larvae

67%

Witeska M. , Bilska K. , Sarnowski P.

tom 19

nr 1

227-230

Barbel eggs and fry were exposed from fertilization until 14 days after hatching to 100 μg/l of copper or cadmium. Cadmium, but not copper, significantly reduced larvae survival. Both metals significantly decreased larval growth. The differences in fish body size between the controls and metal-exposed groups increased in time, and were more pronounced in Cd-intoxicated fish. Copper-exposed larvae started exogenous feeding 1 day later than the control. Cadmium-exposed larvae started feeding 4 days after the controls. Both metals reduced yolk utilization rate. The results demonstrated that cadmium was more toxic to barbel larvae than copper.