Can artificial diets be a feasible alternative for the gonadal growth and maturation of the sea urchin Paracentrotus lividus (Lamarck, 1816)?

Santos, Pedro M.; Ferreira, Susana M. F.; Albano, Pedro; Raposo, Andreia; Costa, José L.; Pombo, Ana

http://hdl.handle.net/10400.8/5066

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Authors

Santos, Pedro M.

Ferreira, Susana M. F.

Abstract(s)

Paracentrotus lividus (Lamarck 1816) has high-value reddishorange gonads that are regarded as a delicacy. In this study, three jellified diets have been tested for 90 days to assess the effect of different diets on P. lividus somatic and gonadal growth, gonad color, and reproductive state. All diets contained agar as a gelling agent and consisted of: maize and spinach (A); maize, spinach, and macroalga Laminaria digitata (B); and maize, spinach, and pumpkin Cucurbita maxima (C). Diet B was the most successful in promoting somatic growth with regard to test diameter (1.2 mm month−1) and total wet weight (79.9 mg ind−1 day−1). The individuals from Diet A presented a higher final gonadosomatic index (9.07 ± 2.39%) where all sea urchins initially presented with an index of 3.33 ± 0.02%. Diets A and C led to a marked advance (p < .05) in the gametogenic cycle (66.7% and 46.7% of the individuals with mature gametes, respectively), while Diet B resulted in less-developed gonadal stages, which are more appropriate for commercial purposes in terms of sensorial characteristics appreciated by the consumers. The gonad color analyses confirmed a redder roe in females and also the suitability of C. maxima as a potential gonad color enhancer for P. lividus.

Description

This project was supported financially by the Operational Programme MAR2020 through the project 16-02-01-FMP-0004: Ouriceira Aqua: Aquaculture and Enhancement of Gonad Production in the Sea Urchin (Paracentrotus lividus). This study was also supported by Fundaç~ao para a Ciência e Tecnologia (FCT) through the strategic project UID/MAR/04292/2019 granted to MARE—Marine and Environmental Sciences Centre.

Keywords

Gonad maturation Histology Nutrition Reproductive cycle

URI

http://hdl.handle.net/10400.8/5066

Citation

Santos, P.M., Ferreira, S., Albano, P., Raposo, A., Costa, J.L., & Pombo, Ana. (2019). Can artificial diets be a feasible alternative for gonadal growth and maturation of the sea urchin Paracentrotus lividus (Lamarck, 1816)?. Journal of the World Aquaculture Society. DOI: 10.1111/jwas.12656