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April 17, 2013



Reproductive Behavior of Wild-Caught and Pond-Reared Penaeus monodon Broodstock



From Abstract: Ongoing problems exist with the commercial-scale domestication of Penaeus monodon.  Using time-lapse video observations, this study looked at mating success by comparing the mating behavior of pond-reared (domesticated) and wild-caught P. monodon broodstock.


Mating success of the pond-reared shrimp was found to be low relative to wild-caught shrimp.  It was determined that both male and female shrimp contributed to this low mating rate suggesting both genders were impacted negatively by the domestication process.  The causative factors for the low mating success are yet to be determined; however, external physical abnormalities and lack of sexual maturity did not appear to play a role.  The most notable behavioral difference between wild-caught and domesticated shrimp was a reduced level of pursuit behavior by domesticated males.  This, and other behavioral differences are discussed in relation to an increasing body of evidence that male prawns respond to sex pheromones produced by receptive females and that males detect these chemical signals in part via their second antennal flagella.  Accordingly we hypothesize that pond-reared females may have a reduced ability to produce or release sex pheromones and males, a reduced ability to detect them when compared to their wild-caught counterparts.


Source: Aquaculture.  Reproductive Behavioural Differences Between Wild-Caught and Pond-Reared Penaeus Monodon Prawn Broodstock.  Gay Marsden (Kimberley Training Institute, P.O. Box 1380, Broome Western Australia 6725, Australia) Neil Richardson, Peter Mather and Wayne Knibb.  In Press, Accepted Manuscript.  Available Online, April 6, 2013.



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