Reproductive activity of the tropical arrow squid Doryteuthis plei around São Sebastião Island (SE Brazil) based on a 10-year fisheries monitoring

Postuma, Felippe Aldert; Gasalla, Maria A.

doi:10.1016/j.fishres.2013.12.011

Cited by 9 publications

(7 citation statements)

References 24 publications

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“…The greatest abundance of D. plei paralarvae around São Sebastião Island (SSI) during the summer months may be linked to spawning aggregations near shore, as reported by Postuma & Gasalla (), when the mature squid population becomes vulnerable to artisanal fishery. These aggregations were observed in shallow waters (5 to 20 m isobaths) in the north/northeast and south/southeast during the summer months, with peaks between February and March, and were associated with the warm SST (Postuma & Gasalla, ). During summer in the SSI, a strong vertical thermal stratification is observed that is caused by the intrusion of the SACW, which is responsible for local enrichment and stability in the water column (Castro et al., ).…”

Section: Discussionmentioning

confidence: 83%

“…Although paralarvae occurred throughout the study area, they were found especially near the shore, a pattern observed among several species of Loliginidae ( Doryteuthis pealeii Vecchione, ; L. brevis Vecchione, ; Doryteuthis gahi Rodhouse, Symon, & Hatfield, ; Doryteuthis opalescens Zeidberg & Hamner, ; Loligo vulgaris Piatkowski, ; González et al., ; Moreno et al., ; D. plei Martins & Perez, ; Loligo forbesi Piatkowski, ; D. sanpaulensis Vidal et al., ). Distribution patterns can be related to the distribution of adults because mature individuals move to shallow areas for reproduction and spawning (Rodrigues & Gasalla, ), when they are usually the target of fisheries (Postuma & Gasalla, , ). According to Lipiński (), the concentration of mature cephalopods determines the distribution and abundance of paralarvae.…”

Section: Discussionmentioning

confidence: 99%

“…Doryteuthis spp. have been caught by industrial (shrimp‐trawling) and coastal small‐scale fisheries (hand‐jigging) (Gasalla, Postuma, & Tomás, ; Perez, ; Perez, Aguiar, & Oliveira, ; Postuma & Gasalla, , ; Rodrigues & Gasalla, ). In contrast, L. brevis is caught as an incidental bycatch by shrimp fisheries, but has no commercial value (Zaleski, , ).…”

Section: Introductionmentioning

confidence: 99%

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Distribution patterns of loliginid squid paralarvae in relation to the oceanographic features off the South Brazil Bight (22°–25°S)

Araújo

Gasalla

2017

Fisheries Oceanography

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Loliginid squids constitute marine resources of increasing importance in shelf ecosystems off the coast of South Brazil. However, the existing information and knowledge about the occurrence of early-life stages and causes of distributional patterns are insufficient. Here, we have revisited Brazilian historical plankton samples waters and upwelling events, D. plei occurred primarily in the southern region of the study area and in warmer waters, and L. brevis was found in shallow and low salinity waters in the estuarine region off the coast of Santos. Overall, the highest abundance of paralarvae occurred in the nearshore, northernmost areas during summer, and this can be associated with the observed retention mechanisms caused by local circulation, seasonal upwelling, the intrusion of nutrient-rich waters, and spawning peaks. The present study provides new information and evidence for loliginid patterns in the area that may potentially be useful for better understanding the recruitment patterns and fishery assessments of squid populations. K E Y W O R D Scephalopods, early-life stages, historical marine archives, Loliginidae, oceanographic surveys

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Section: Discussionmentioning

confidence: 83%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Distribution patterns of loliginid squid paralarvae in relation to the oceanographic features off the South Brazil Bight (22°–25°S)

Araújo

Gasalla

2017

Fisheries Oceanography

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“…A maior parte dos estudos tem se focado no recurso biológico em si, avaliando principalmente a dinâmica populacional da lula, características ambientais que influenciam as populações, posição da lula na cadeia alimentar e transporte larval da D. plei e D. sanpaulensis (MARTINS, 2014;GASALLA et al, 2010POSTUMA e GASALLA, 2010POSTUMA, 210;POSTUMA e GASALLA, 2014). Foi mencionado que tais características são importantes para um manejo desse recurso (GASALLA et al, 2010;POSTUMA, 2010;RODRIGUES e GASALLA, 2008).…”

Section: Figura 1-zangarilho Usado Para Pesca Da Lulaunclassified

Análise socioambiental dos pescadores de lulas (Mollusca: Cephalopoda) na região de São Sebastião, Estado de São Paulo

Mercado¹

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Mãos calejadas pelos remos. Braços enrijecidos pelo movimento De lançar a rede e recolhê-la. Pele ressequida pelo sol candente E o balanço da jangada Na onda rasa do mar Hércules,1981 AGRADECIMENTOS À Profa. Dra. Maria de los Angeles Gasalla pela orientação, pela oportunidade oferecida, incentivo, ensinamentos e a paciência durante a realização da tese. Muito obrigada! Aos pescadores, pois sem eles este trabalho não seria possível e especialmente ao Chico, Geovanne, Silvio, Márcio Silvestre, Délio Margarido e Alberto Ribeiro. Agradeço sobretudo à Wanda, funcionária do Instituto de Pesca. Sou grata pelo carinho que eu recebi durante minha ida ao campo. Fiz muitas amizades que vou levar para sempre. Também pelas conversas incríveis que tive com cada um deles. Aprendi muito! Agradeço ao Instituto Oceanográfico pela oportunidade de conviver com pesquisadores e presenciar o desenvolvimento das pesquisas que ali ocorrem. À Biblioteca Prof. Dr. Gelso Vazzoler e aos funcionários Wagner, Cidinha, Marta e Daniel, sempre muito atenciosos e prestativos. Ao Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) pela bolsa concedida durante a realização da dissertação. Ao Programa de Aperfeiçoamento de Ensino (PAE), ao Professor Rubens Lopes e à Professora Mary pela oportunidade de presenciar e acompanhar de perto o processo de preparar aulas e ensinar na graduação.

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“…In counterpart, cephalopods are consumed by small squid starting at 142 mm and going up to 213 mm, with a peak at 172 mm. According to research into the reproductive activity, of this species in the study area performed by (Postuma and Gasalla, 2014), the size-atmaturity of females occurs from 131 mm up to 175 mm ML.…”

Section: Dietary Ontogenetic Shiftsmentioning

confidence: 99%

Population biology and behavioural aspects of the squid <i>Doryteuthis plei</i> (Blainville, 1823) in the northern coast of São Paulo, with emphasis on reproduction and feeding

Postuma¹

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This PhD thesis addresses several aspects of the biology and ecology of the squid Doryteuthis plei in the coast of São Paulo, SE Brazil, at both the population and individual levels. On the population structure of the exploited stock, it includes the patterns of reproductive activity, size-at-maturity, and biometrics of reproductive organs associated with squid size, as well as feeding habits and ontogenetic, sexual, and spatial-temporal shifts. Generalized Additive Models for Location, Scale, and Shape (GAMLSS) were used to identify such population patterns and spatial and temporal factors based on the particular small-scale fishery that targets the species around the São Sebastião Island. At the individual level, the study focused on behavioural traits in two periods of the life-cycle: (1) the reproductive phase, where the body patterns were described, generating a comprehensive ethogram for the species, and (2) the paralarval phase, where the development of swimming and predatory behaviours was detailed. Size-at-maturity was found to be 151-175 mm of mantle length (ML) for females, and 187-190 mm ML for males, that also showed the co-occurrence of two distinct maturation groups (Chapter 1). A significant peak of females gonad weight occurs in February and March especially in the island's South and Southeastern areas, and of males in March. An ethogram analysis showed 19 chromatic, 5 locomotor, and 12 postural components and behavioural sequences for the species, including agonistic, courtship, and mating behaviour (Chapter 2). Light chromatic components (clear and iridophore splotches) showed a longer duration than dark chromatic components, especially those associated with calm behaviour, more frequent in females. Males appeared more dedicated to disputes over resources and used fast miscellaneous visual signalling. In respect to feeding habits (Chapter 3), prey composition differed among sexes, size, maturity, and spatio-temporal pattern. Females do not stop feeding during sexual maturation and the amount of food increases with size. Cephalopods were significant preys for mature females, as well as fish and crustaceans to the largest females, while pelagic polychaetes were dominant prey for largest males. Observations and filming of D. plei paralarvae (Chapter 4) show a complex predatory behaviour on live preys, with different hunting types differing in speed and position. Aggressive intra-specific behaviour was found in the absence of prey when paralarvae show both a pursuit strategy and a rapid backward escape after attack. These findings contribute to better understand the population biology and behavior of the species and also in the future definition and guidance of fisheries management plans.

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Reproductive activity of the tropical arrow squid Doryteuthis plei around São Sebastião Island (SE Brazil) based on a 10-year fisheries monitoring

Cited by 9 publications

References 24 publications

Distribution patterns of loliginid squid paralarvae in relation to the oceanographic features off the South Brazil Bight (22°–25°S)

Distribution patterns of loliginid squid paralarvae in relation to the oceanographic features off the South Brazil Bight (22°–25°S)

Análise socioambiental dos pescadores de lulas (Mollusca: Cephalopoda) na região de São Sebastião, Estado de São Paulo

Population biology and behavioural aspects of the squid <i>Doryteuthis plei</i> (Blainville, 1823) in the northern coast of São Paulo, with emphasis on reproduction and feeding

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