The Sao Paulo shelf (SE Brazil) as a nursery ground for Doryteuthis plei (Blainville, 1823) (Cephalopoda, Loliginidae) paralarvae: a Lagrangian particle-tracking Individual-Based Model approach

Autor(es)

Martins, Rodrigo Silvestre ^[1] ; de Camargo, Ricardo ^[2] ; Gasalla, Maria A. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Fisheries Ecosyst Lab LabPesq, Oceanog Inst, BR-05508900 Sao Paulo - Brazil

^[2] Univ Sao Paulo, Inst Astron Geophys & Atmospher Sci, BR-05508900 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Hydrobiologia; v. 725, n. 1, p. 57-68, MAR 2014.
• Citações Web of Science: 6

Resumo

The Sao Paulo shelf ranges from similar to 23A degrees S to 25A degrees S, comprising nearly 622 km of shoreline. This region sustains historical landings of the tropical arrow squid Doryteuthis plei. As in other coleoid cephalopods, the broodstock dies following spawning and the continuance of the population relies exclusively upon the survival of the paralarvae, which are very sensitive to oceanographic conditions. As a first step towards the understanding of paralarval transport, the shelf area was evaluated in terms of retention/dispersion potential. A Lagrangian particle-tracking Individual-Based Model was set up using a 3D Princeton Ocean Model model forced with in situ data obtained from July 2009 to July 2011. Neutrally buoyant particles were released every first day of every month in the model, and tracked for 30 days. The retention potential was high for particles released from the bottom all over the study area from the coast to the shelf break (200 m isobath). Offshore losses showed a marked seasonality. Regarding inshore losses, the percentage of particles beached was constant year round and smaller than offshore losses, being higher south of 24A degrees S. Simulation results seem to agree with present knowledge of the reproductive behaviour of the species in the region. (AU)

• Processo FAPESP: 12/14140-6 - Cephalopod International Advisory Council Symposium 2012 (CIAC '12)
• Beneficiário: Maria de Los Angeles Gasalla
• Modalidade de apoio: Auxílio Organização - Reunião Científica
• Processo FAPESP: 10/15978-8 - Modelagem do transporte larval da lula Loligo plei Blainville, 1823 explotada pela pesca no litoral do estado de São Paulo
• Beneficiário: Rodrigo Silvestre Martins
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 10/50183-6 - A lula (Cephalopoda: Loliginidae) como recurso da pesca no litoral norte do estado de São Paulo: dinâmica populacional, oceanografia pesqueira e a dimensão humana associada
• Beneficiário: Maria de Los Angeles Gasalla
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Regular