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Effects of triploidy induction on productive traits of the Caribbean pectinid, Argopecten nucleus (Mollusca: Bivalvia)

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Abstract Argopecten nucleus is a small size pectinid, whose farming and hatchery technology have been developed at experimental and pilot scales. In order to assess the effectiveness of biotechnological tools… Click to show full abstract

Abstract Argopecten nucleus is a small size pectinid, whose farming and hatchery technology have been developed at experimental and pilot scales. In order to assess the effectiveness of biotechnological tools for the improvement of productive traits, the effects of triploidy induction on its growth and survival rates at different developmental stages were analyzed. Thus, zygotes that underwent cold-shock treatment (12 °C for 15 min) and untreated zygotes were cultured in the laboratory during their embryonic, larval and post-larval stages, while juvenile and adults were farmed in sea-based suspended systems. Ploidy condition was verified by cytofluorometry. Growth was similar in induced to triploid and untreated larvae and post-larvae. Similarly, no differences were found for shell growth and wet weight in confirmed triploid juveniles and adults, in comparison to diploid individuals. In addition, although no effects of the triploidy induction treatment was observed on the survival of larvae and post-larvae, triploid juveniles and adults exhibited a lower survival than diploids. Thus, the triploid condition did not to confer advantages in terms of growth; instead it caused a decrease on the survival of juveniles and adults, negatively impacting the biomass yield of this pectinid species.

Keywords: pectinid; triploidy induction; argopecten nucleus; effects triploidy; productive traits

Journal Title: Aquaculture
Year Published: 2020

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