Rate of gastric digestion in the larvicidal fishesAplocheilus lineatus (Cuv. &amp; Val.) andMacropodus cupanus (Cuv. &amp; Val.)

Jacob, Sheila Susan; Nair, N. Unnikrishnan

doi:10.1007/bf03186018

Cited by 3 publications

(3 citation statements)

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“…Within species, satiation amount is dependent on stomach capacity, which in turn varies according to the size of the fish. The present study indicates that as fish size increases satiation time increases and satiation amount decreases, in agreement with earlier reports (Brett, 1971;Jacob & Nair, 1981). The percentage body weight of food consumed by the fry, fingerlings and adults was 25-2%, 5.8% and 3.85% respectively (Table 11) and this negative relationship has been reported previously in other fishes (Brett, 1971;Jacob & Nair, 1981).…”

Section: Discussionsupporting

confidence: 93%

“…Fry (0.1-1 g) consumed an average of 2 1 mosquito larvae per fish in one meal while fingerlings (1-2 g)consumedanaverageof49mosquito larvaeperfish. Thesevalues are comparable and in some cases higher than those reported for fishes recognized as predators on mosquito larvae like Macropodus cupanus (Valenciennes) (Menon & Rajagopalan, 1977;Jacob & Nair, 1981), Gambusia afJinis (Baird and Girard) (Reddy, 1973); Aplocheilus lineatus (Cuvier and Valenciennes) (Jacob & Nair,198 1) and Poecilia reticulata (Peters) (Reddy, 1973). Hence the positive role played by the young of this fish in controlling mosquito larvae seems to be as important as other larvicidal fishes.…”

Section: Discussionsupporting

confidence: 50%

“…Satiation time and satiation amount in fishes vary from species to species and with size in the same species (Ishiwata, 1968;Brett, 1971;Jacob & Nair, 1981). Within species, satiation amount is dependent on stomach capacity, which in turn varies according to the size of the fish.…”

Section: Discussionmentioning

confidence: 99%

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Influence of size and level of satiation on prey handling time in Channa striata (Bloch)

Bindoo

Aravindan

1992

Journal of Fish Biology

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Channa striala fry (100 20 mg) and fingerlings (2 & 0.2 g) were offered mosquito larvae as prey and the adults (75 _+ 5 g) small fishes. The size of the fish was directly related to satiation time and inversely related to satiation amount. The influence of satiation levels on handling time, showed an increase to almost eight-fold in fry and fingerlings and about two-fold in adults. The study also revealed the role played by the young of C. striala in mosquito control. With the increase in size of the fish the preference for mosquito larvae was seen to decrease. The air breathing habit and hence its ability to survive in polluted and oxygen-depleted waters makes it a suitable candidate as a fish for mosquito control.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionsupporting

confidence: 50%

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Influence of size and level of satiation on prey handling time in Channa striata (Bloch)

Bindoo

Aravindan

1992

Journal of Fish Biology

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Reproductive biology of the larvivorous fishMacropodus cupanus (Cuv. and Val.)

Jacob

Nair

1983

Proc Ani Sci

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Investigations on the maturity stages, pattern of distribution of ova in the ovary, growth of the ova to maturity, minimum size at first maturity, sex ratio, growth rate of the ovary, spawningfrequency, spawningseason and fish.fecundityrelationships of the larvivorous fish Macropodus cupanus indicate the extent to which breeding is geared to take maximum advantage of environmental and other factors which afford the greatest opportunity for survival and development of the new generation. The mode of development and growth of the ova reveal that the first maturation is normally delayed tiII the main period of body growth is over; further, the linear relationships derived between growth rate of the (female) gonads and fish size are a reflection of the symmetry of the gonads. Correlating data on egg size, fecundity and conditions for incubation, M. cupanus with its high fecundity and rapid development can be said to incline towards 'r~lection' on the continuum between 'k' and 'r~lection '. Investigations on spawning frequency and season reveal the protracted spawning season from April to September and the shorter one in January and February. The distinct monsoon spawning peak leading to an increase of its population during this season coincides with the peak incidence of mosquito larvae, indicating the larvivorous potential of the fish.

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Food and feeding habits of the larvivorous fish Aplocheilus lineatus (Cuv. & Val.) in its natural habitat

Jacob

Nair

1982

Journal of Fish Biology

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Results are presented of a study of the food and feeding habits of Aplocheilus lineatus under natural conditions and the manner in which dietary preferences are influenced by the habitat/environment, seasons and stage of maturity of the fish is explained, based on data from montly random samples collected for a year. A qualitative assessment of the diet reveals that it is not confined to a varied range of aquatic fauna, but also encompasses allochthonous fauna. Quantitative and qualitative analyses of the diet indicate its feeding habit which does not alter with size or seasonal changes. The range of prey consumed does not differ radically, qualitatively, as a function of size, but quantitatively exhibits five levels of discrimination and differential exploitation related mainly to prey size. Seasonal fluctuations in feeding are more qualitative than quantitative and seem dependent on the occurrence of food organisms. The lack of correlation between breeding and feeding is linked to extent of the development of the gonad in the body cavity. In conclusion, the potential ofthe fish as an effective biological control agent of mosquito larvae is indicated by the fact that dipteran larvae are a preferred item ofits diet in all size groups.

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Rate of gastric digestion in the larvicidal fishesAplocheilus lineatus (Cuv. & Val.) andMacropodus cupanus (Cuv. & Val.)

Cited by 3 publications

References 30 publications

Influence of size and level of satiation on prey handling time in Channa striata (Bloch)

Influence of size and level of satiation on prey handling time in Channa striata (Bloch)

Reproductive biology of the larvivorous fishMacropodus cupanus (Cuv. and Val.)

Food and feeding habits of the larvivorous fish Aplocheilus lineatus (Cuv. & Val.) in its natural habitat

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