Biologia populacional e reprodutiva do camarão sete-barbas na Baía de Santos, São Paulo

Heckler, Gisele Salgado; Simões, Sabrina Morilhas; Lopes, Mateus; Zara, Fernando José; Costa, Rogério Caetano da

doi:10.20950/1678-2305.2013v39n3p283

Cited by 19 publications

(9 citation statements)

References 11 publications

(13 reference statements)

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“…The overall sex ratio of the seabob shrimp X. kroyeri found in this study did not differ from (1:1). Similar results were observed in other Brazilian localities: in the studies by Branco (2005) in the State of Santa Catarina; Fernandes et al (2011) in the State of Rio de Janeiro; Eutrópio et al (2013) in the State of Espírito Santo; Heckler et al (2013a) and Castilho et al (2015) in the State of São Paulo. This pattern agreed with the theory of sexual allocation described by Fisher (1930), who assumed that for gonochoric species, the expected sex ratio is 1:1.…”

Section: Discussionsupporting

confidence: 84%

Growth and population structure of the seabob shrimp Xiphopenaeus kroyeri (Decapoda: Penaeidae) on the continental shelf of Sergipe, Brazil

et al. 2018

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This study evaluated the population structure, growth and longevity of Xiphopenaeus kroyeri in the State of Sergipe. The obtained data were compared with other populations on a latitudinal scale in order to evaluate whether the latitudinal paradigm applies to this species. Shrimp sampling took place monthly from September 2013 to August 2014, in nine stations distributed at 5, 15 and 30 m depths, using a shrimp fishery boat equipped with a ‘double rig’ net. Sexual maturity was estimated by the logistic function y = a/(1 + b*exp(-cx)), and the sex ratio was analysed with the Chi-square test. The individual growth rate was estimated using the von Bertalanffy model, and the longevity was estimated by the inverse form of this formula. A total of 6418 (3457 females and 2961 males) was analysed. The size at onset of sexual maturity was 12 mm of carapace length (CL) for males and 12.5 mm CL for females. The total sex ratio did not differ from the expected (1:1). Males exhibited higher growth coefficients (k) and smaller asymptotic growth (CC∞ = 28.74 mm, k = 0.0081 day−1) than females (CC∞ = 30.79 mm, k = 0.0058 day−1). The estimated longevity (years) was 1.55 for males and 2.15 for females. No evident latitudinal pattern was observed regarding the size at onset of sexual maturity or the growth parameters for X. kroyeri. The information found, besides contributing to the knowledge about the biology of this shrimp, can also clarify hypotheses presented in relation to the latitudinal paradigm along the Brazilian coast.

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Section: Discussionsupporting

confidence: 84%

Growth and population structure of the seabob shrimp Xiphopenaeus kroyeri (Decapoda: Penaeidae) on the continental shelf of Sergipe, Brazil

et al. 2018

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“…The greatest reproductive intensities were registered from January to May for X. kroyeri and from September to November for F. subtilis, which is in agreement with the results from previous studies on these species in other regions of Brazil (SANTOS and IVO, 2000;SANTOS et al, 2001;CASTRO et al, 2005, SANTOS andFREITAS, 2006;ALMEIDA et al, 2012;HECKLER et al, 2013;CASTILHO et al, 2015). For L. schmitti, due the low number of reproductive females (≤ 11) and developed males (≤ 12) during all studied months, our results should be considered with caution.…”

Section: Discussionsupporting

confidence: 91%

“…Thus, we suppose that the great quantity of juveniles sampled at 5 and 15 m, in comparison to 30 m, was due to the migratory behavior of these species. Juvenile and adult individuals of X. kroyeri are expected to be found in the same area simultaneously, since juveniles of this species do not use estuaries (VALENTINI et al, 1991;BRAGA, 2000;BRANCO, 2005;HECKLER et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

Avaliação do plano de manejo de camarões peneídeos na plataforma continental de Sergipe, Brasil

Santos¹,

Silva²,

Costa

et al. 2017

Bol. Inst. Pesca

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RESUMOEste estudo avaliou se a reprodução e o recrutamento temporal e espacial das principais espécies de camarões marinhos explotados no Estado de Sergipe (Xiphopenaeus kroyeri, Farfantepenaeus subtilis e Litopenaeus schmitti) estão sendo protegidos, em comparação com normativa MMA nº 14, de 14 de outubro de 2004. As coletas foram realizadas de setembro/2013 a agosto/2014 na plataforma continental de Sergipe, em nove transectos, distribuídos nas profundidades de 5, 15 e 30m, utilizando um barco camaroeiro equipado com rede de arrasto de portas. Após as coletas os indivíduos foram identificados ao nível específico, subamostrados, sexados, mensurados quanto ao comprimento da carapaça e classificados quanto à morfologia gonadal. O recrutamento e a reprodução das três espécies ocorreram continuamente ao longo do ano, apresentando picos de intensidade. Indivíduos reprodutivos e juvenis foram mais abundantes nos 30m para F. subtilis, enquanto para X. kroyeri e L. schmitti foram mais abundantes nos 5m e 15m. A atual instrução normativa protege parcialmente as categorias reprodutivas e juvenis dessas espécies, principalmente F. subtilis. Portanto, sugere-se a adequação dos períodos de defeso para as épocas de reprodução e recrutamento de F. subtilis, uma vez que a área estipulada pelo IBAMA já protege as demais espécies ao longo do ano.Palavras chave: Xiphopenaeus; Farfantepenaeus; Litopenaeus; recrutamento; período reprodutivo; pesca. ABSTRACTThis study evaluated if the temporal and spatial reproduction and recruitment of the main species of marine shrimps exploited in the state of Sergipe (Xiphopenaeus kroyeri, Farfantepenaeus subtilis, and Litopenaeus schmitti) are being protected, in relation to the closed season based on the normative instruction MMA n° 14, of October 14 th 2004. The samples were collected monthly from September 2013 to August 2014 at the continental shelf of Sergipe, in nine transects, distributed in the depths of 5, 15, and 30 m using a shrimping boat equipped with double ring nets. After sampling, we identified shrimps to the species level; subsampled, sexed them, measured carapace length, and observed the gonads. Recruitment and reproduction in the three species occur continuously, albeit with intensity peaks. Regarding space, reproductive individuals and recruits were more abundant at 30 m in the case of F. subtilis, while for X. kroyeri and L. schmitti, higher abundances were found at 5 and 15 m. The current normative instruction partially protects the reproductive and juveniles categories of these species, mainly F. subtilis. Thus, we suggest closed seasons at breeding and recruitment seasons of F. subtilis, since the area set by IBAMA already protects other species throughout the year.

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“…Therefore, the time frame currently stipulated by the legislation is also controversial since the current closing period was developed for another shrimp stock with different behavior and population patterns. In fact, Heckler et al (2013) show the existence of two main periods of female maturation, suggesting that closure for the seabob-shrimp should be brought forward if protection of the spawning season is desired. In terms of the recruitment period, Severino Rodrigues et al (1992) reported that recruitment of the seabob-shrimp starts as of the species' 20 th or 30 th month of life and fishery catches contain a considerable amount of young individuals.…”

Section: Fisheries Assessment Overview: the Seabob Shrimp Stock And Imentioning

confidence: 99%

The loss of fishing territories in coastal areas: the case of seabob-shrimp small-scale fisheries in São Paulo, Brazil

Gasalla

Gandini²

2016

Maritime Studies

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Knowledge of the difficulties, costs, and territorial issues surrounding fishing communities seems crucial to achieve sustainable development goals in marine and coastal zones. However, such knowledge is not always available, sufficient, or even identifiable. The seabob-shrimp small-scale fisheries in the shallow waters of the State of São Paulo, in Southeastern Brazil, plays an important role in coastal livelihoods, providing social and economic benefits for a number of local communities and a premium source of regional seafood. Around 4000 fish-workers produce supplies for restaurants, fishmongers and supermarkets in coastal towns with about 2 million inhabitants. Nevertheless, harbor and naval mooring, the construction of pipelines, sewage disposal, controversial seasonal closures, and marine spatial zoning have all restricted the activity. A territorial approach is here proposed to examine the timeline of vertically implemented laws/regulations that may have resulted in a decrease of territories formerly available to that fisheries, accompanied by a comprehensive outlook of the overall policy context. The shrinkage of fishing territories has been evidenced and the kind of territorial loss detected does not seem to be implicit in cost analysis of fisheries, ecosystem services, or compensation. Top-down policies and a misunderstanding of environmental mitigation programs appear to have been contributing to increasing conflicts, mining multi-stakeholder processes and social justice in contrast to the ascendant economic growth of both the oil and gas and port industries. While economic and political pressures seem to shape current fishing territories, the recognition of the diversity of interests and power asymmetries in coastal zones directs our attention to a vital, often ignored, dimension of social reality. Institutional challenges and recommendations, such as territorial use rights and legal innovations are discussed, adding value to the self-organization of local communities for an effective process of balanced power both within and outside legal marine protected areas.

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Biologia populacional e reprodutiva do camarão sete-barbas na Baía de Santos, São Paulo

Cited by 19 publications

References 11 publications

Growth and population structure of the seabob shrimp Xiphopenaeus kroyeri (Decapoda: Penaeidae) on the continental shelf of Sergipe, Brazil

Growth and population structure of the seabob shrimp Xiphopenaeus kroyeri (Decapoda: Penaeidae) on the continental shelf of Sergipe, Brazil

Avaliação do plano de manejo de camarões peneídeos na plataforma continental de Sergipe, Brasil

The loss of fishing territories in coastal areas: the case of seabob-shrimp small-scale fisheries in São Paulo, Brazil

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Biologia populacional e reprodutiva do camarão sete-barbas na Baía de Santos, São Paulo

Cited by 19 publications

References 11 publications

Growth and population structure of the seabob shrimp Xiphopenaeus kroyeri (Decapoda: Penaeidae) on the continental shelf of Sergipe, Brazil

Growth and population structure of the seabob shrimp Xiphopenaeus kroyeri (Decapoda: Penaeidae) on the continental shelf of Sergipe, Brazil

Avaliação do plano de manejo de camarões peneí­­deos na plataforma continental de Sergipe, Brasil

The loss of fishing territories in coastal areas: the case of seabob-shrimp small-scale fisheries in São Paulo, Brazil

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Avaliação do plano de manejo de camarões peneídeos na plataforma continental de Sergipe, Brasil