Influence of the type of collector and collector preparation periods on the settling rate of the scallop Nodipecten nodosus L. in the laboratory

Authors: Zanette, Guilherme Búrigo¹; Ferreira, Jaime Fernando¹; da Silva, Francisco Carlos¹; Pereira, Adriana²; de Melo, Cláudio Manoel Rodrigues¹

Source: Aquaculture Research, Volume 40, Number 13, September 2009 , pp. 1451-1458(8)

Publisher: Blackwell Publishing

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Abstract:

We analysed the settling rate of Nodipecten nodosus L. scallop spats during winter and spring, testing different types of collectors and collector preparation periods. Larval rearing was conducted with water exchange every 48 h, density at 2 larvae mL⁻¹ and feeding between 0.5 and 2 × 10⁴ microalgae cellsmL⁻¹. The recovery larvae based on D-larvae produced were 31.6% (Winter Trial) and 47.2% (Spring Trial), without any antibacterial additives. The mean settling rates obtained in Winter Trial were from 0.04% to 0.79% withstand in Spring Trial were 24.99-48.65%. In the Winter Trial, there was no statistical difference between the settling rate of collectors prepared for 6 or 12 days. The settling rates of the netlon collectors with pine leaves were up to 19 times higher than those of the other types of collectors. In the Spring Trial, there was no statistical difference between the settling rates of the netlon and plastic net fruit collectors. Collectors with pine leaves produced a yield of spats up to 48.65%, more than those without pine leaves (P<0.01). The efficiency of larval rearing and settling obtained in spring, pine leaves and low-cost local material indicate the feasibility to improve and facilitate regular production of N. nodosus spats for promotion of the growth of scallop culture in Brazil.

Keywords: Nodipecten nodosus L; settling; collectors; larval rearing; scallop

Document Type: Research article

DOI: 10.1111/j.1365-2109.2008.02157.x

Affiliations: 1: Laboratory of Marine Mollusks, Aquaculture Department, Federal University of Santa Catarina (LMM-UFSC), Beco dos Coroas s/n, Barra da Lagoa, Florianópolis, SC, Brasil 2: Centre for Development of Aquaculture and Fisheries (EPAGRI/CEDAP), Santa Catarina State Institution for Agricultural Research and Rural Extension, Rodovia Admar Gonzaga km 03, Itacorubi, Florianópolis, SC, Brasil