Improvement in the reproductive productivity of the tropical calanoid copepod Parvocalanus crassirostris through selective breeding

Alajmi, Fahad, Zeng, Chaoshu, and Jerry, Dean R. (2014) Improvement in the reproductive productivity of the tropical calanoid copepod Parvocalanus crassirostris through selective breeding. Aquaculture, 420–421. pp. 18-23.

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Abstract

Calanoid copepods are ideal live feeds for fish larvae. However, their utilisation in aquaculture hatcheries is impeded by their lowculture productivity. Improvement in egg production is likely to lead to enhanced culture productivity. Therefore, the aimof this study was to evaluate the practicality of applying a simple selective breeding program to improve the reproductive capacity of the calanoid copepod Parvocalanus crassirostris. Using a family selection program combined with a circular mating strategy, P. crassirostris was cultured for five generations. Females were selected for their high reproductive capacity, and a control chosen by randomselection was maintained alongside. After five generations, the Select line exhibited a positive response for selection with a significant increase in total egg production of 24.5% over the female lifespan, with a calculated heritability (h2) of 0.38. Selection also resulted in a significant increase in the size of female nauplii and eggs when compared with the Control line. Our results provide the first clear evidence of the effectiveness and high potential of selective breeding in enhancing the reproductive capacity of calanoid copepods. Furthermore, our results suggest that further investigations into improvement of other life history traits can be implemented as a similar method for the improvement of culture productivity and other traits to generate suitable calanoid copepods for larval live food.

Item ID: 34847
Item Type: Article (Research - C1)
ISSN: 1873-5622
Keywords: copepod; Parvocalanus crassirostris; selective breeding; egg production; response; heritability
Funders: James Cook University (JCU), Centre for Sustainable Tropical Fisheries and Aquaculture (CSTFA), James Cook University
Projects and Grants: JCU Faculty Incentive Grant, Faculty of Science and Engineering 2012
Date Deposited: 21 Aug 2014 04:22
FoR Codes: 07 AGRICULTURAL AND VETERINARY SCIENCES > 0704 Fisheries Sciences > 070401 Aquaculture @ 100%
SEO Codes: 83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8301 Fisheries - Aquaculture > 830101 Aquaculture Crustaceans (excl. Rock Lobster and Prawns) @ 100%
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