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Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.

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Reproductive performance of Macrobrachium rosenbergii females in captivity Cavalli, R.O.; Lavens, P.; Sorgeloos, P. (2001). Reproductive performance of Macrobrachium rosenbergii females in captivity. J. World Aquacult. Soc. 32(1): 60-67. dx.doi.org/10.1111/j.1749-7345.2001.tb00922.x In: Journal of the World Aquaculture Society. World Aquaculture Society: Baton Rouge, La.. ISSN 0893-8849; e-ISSN 1749-7345, meer

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Beschikbaar in	Auteurs
VLIZ: Open Marine Archive 98603 [ download pdf ]

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Trefwoorden

Aquaculture systems > Recirculating systems Biological phenomena > Metamorphosis > Moulting Cultures > Shellfish culture > Crustacean culture > Prawn culture Properties > Biological properties > Fecundity Rearing Reproductive cycle Macrobrachium rosenbergii (De Man, 1879) [WoRMS] Brak water; Zoet water

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Auteurs		Top
Cavalli, R.O. Lavens, P., meer Sorgeloos, P., meer

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Abstract

The breeding frequency, fecundity, egg hatchability, larval output and viability of pond-reared, mature Macrobrachium rosenbergii females were individually followed up during 180 d. Sexually mature prawns were maintained under controlled laboratory conditions (28.7 C and 12-h light/d) in a 190-L freshwater recirculation system and fed a formulated diet. Ovarian development, moulting and spawning events were checked daily. At least six consecutive moults were recorded for each of the 18 females. The duration of the intermoult period averaged 27.5 d and was not affected by ovarian development or spawning, but intermoult periods followed by spawning had significantly lower growth rates. From a total of 126 moulting events recorded, egg laying successfully followed 76 (60.3%) of them. The number of eggs per spawn (NES) varied from 26,587 to 74,775 for females weighing 20.0 to 55.8 g. The relationship between NES and female size (W; in g) was found to be NES = 484 + 1454W (r2in vitro incubation, as the losses of eggs, which usually occur under in vivo incubation are prevented. The present study illustrates that under adequate and stable rearing conditions, M. rosenbergii females are able to spawn up to five times during 180 d, in comparison to three to five times per year as reported for wild prawn populations.

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