Effect of retention processes on the recruitment of tropical arrow squid (Doryteuthis pleii): An individual-based modeling case study in southeastern Brazil

Autor(es)

Martins, Rodrigo Silvestre ^[1] ; de Camargo, Ricardo ^[2] ; Gasalla, Maria A. ^[3]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Paulo, Inst Mar, Lab Ciencias Pesca LabPESCA, Rua Dr Carvalho de Mendonca 144, BR-1107010 Santos, SP - Brazil

^[2] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Rua Matao 1226, BR-05508090 Sao Paulo, SP - Brazil

^[3] Univ Sao Paulo, Inst Oceanog, Lab Ecossistemas Pesqueiros LabPesq, Praca Oceanog 191, BR-05508900 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Fisheries Research; v. 224, APR 2020.
• Citações Web of Science: 0

Resumo

Squid recruitment depends on paralarvae survival, as the parental stock dies following reproduction. Therefore, the biotic and abiotic environmental conditions experienced by paralarvae control recruitment strength`To benefit from the favorable environments (i.e. nursery grounds) in the dynamic pelagic domain, paralarvae rely on passive retention by currents to remain in suitable nursery habitat. To evaluate the retention conditions for tropical arrow squid (Doryteuthis pleii) paralarvae off the South Brazil Bight (SBB, 22-29 degrees S), we ran a series of particle-tracking Individual-Based Models (IBM) coupled to a 3D Princeton Ocean Model (POM). We forced the hydrodynamic model with observed satellite data obtained from January 2000 to December 2010. The IBM-POM models considered two transport scenarios: (1) passive Lagrangian transport and (2) Dial Vertical Migration (DVM). The results show a high retention on actual and putative nursery grounds that could retain paralarvae in a suitable environment for survival, growth, and ultimately to recruit to the adult population. Moreover, model outputs showed high correlation between autumn-winter retention indexes and spring-summer commercial and artisanal landings in the following year. Considering the nine-month post-hatching lifespan of the species, autumn-winter retention indexes potentially provide forthcoming adult biomass predictions. (AU)

• 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
• 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