Abstract
The present study aimed to evaluate the growth and survival of Nodipecten nodosus larvae grown in a remote settlement system. Two forms of transport were tested, one in a humid/wet, environment and one submerged in seawater, with a control treatment maintained at the Laboratory of Marine Mollusks (LMM). After transport treatments, individuals were populated simultaneously inside floating boxes directly at sea and in containers under controlled conditions in the Laboratory of the Experimental Center for Mariculture (CEMAR). No statistical differences were observed in larval survival relative to the method of transport in the different experiments. However, statistical differences were observed in evaluation 1 (EVA1) for the survival and growth of larvae transported in submerged seawater and settled in the laboratory. No statistical difference was observed between the control and either wet/humid or submerged treatments in EVA2. The survival values in the control treatment in EVA3 were higher (p<0.05) in relation to the wet and submerged treatments cultivated in the laboratory. It was not possible to observe the presence of pre-seeds in treatments grown at sea. Is possible to transport larvae for 6 hours of travel to be settled in controlled conditions far from their place of origin.
Highlights
Along the Brazilian coastline, pectinids are represented by six genera and 16 species (Rios, 1994)
In order to improve the remote settlement of scallop larvae, reduce production costs in the laboratory and increase the cultivation of the species, this study evaluates the survival and growth of our model N. nodosus larvae settling at sea and in the laboratory, using different forms of transport
The temperatures inside the isothermal boxes used to transport the larvae during the journey were 23.3 ± 2.3oC, 22.1 ± 1.8oC and 24.3 ± 2.6oC for Evaluation 1 (EVA1), EVA2 and EVA3, respectively, with no differences (p>0.05) between wet or submerged transport treatments
Summary
Along the Brazilian coastline, pectinids are represented by six genera and 16 species (Rios, 1994). Nodipecten nodosus Linnaeus (1758) stands out for its zootechnical and economic potential in aquaculture (Rupp, 2009). This is the largest of the pectinids observed on the Brazilian coast (Rios, 1985), reaching 14 cm in height in wild individuals (Rupp and Parsons, 2006). They are found in small quantities surrounding Santa Catarina Island (Rupp et al, 2011). In contrast to the worldwide cultivation of some pectinids, low capture rates of natural scallop seeds make it necessary to produce them under controlled conditions (Uriarte et al, 2001).
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