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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Martins, Rodrigo Silvestre [1] ; de Camargo, Ricardo [2] ; Gasalla, Maria A. [3]
Total Authors: 3
[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
Total Affiliations: 3
Document type: Journal article
Source: Fisheries Research; v. 224, APR 2020.
Web of Science Citations: 0

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)

FAPESP's process: 10/15978-8 - Modelling the larval transport of the squid Loligo plei Blainville, 1823 exploited by comercial fishing of São Paulo state coast
Grantee:Rodrigo Silvestre Martins
Support type: Scholarships in Brazil - Post-Doctorate