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URI permanente para esta coleçãohttps://rihomolog.furg.br/handle/1/362
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- ItemHabitat selection of the pink shrimp farfantepenaeus paulensis and the blue crab callinectes sapidus in an estuary in southern Brazil: influence of salinity and submerged seagrass meadows(2014) Ruas, Vinicius Mendes; Rodrigues, Marcos Alaniz; Dumont, Luiz Felipe Cestari; D'Incao, FernandoThis study was conducted in two estuarine inlets (Saco da Mangueira and Saco do Arraial) at the Patos Lagoon estuary, southern Brazil. The changes in relative abundance and size of post-larvae and juvenile shrimp Farfantepenaeus paulensis and juvenile blue crab Callinectes sapidus were compared, considering the influence of salinity and the presence of submerged seagrass meadows. The analyses were performed using generalized linear models (GLM) for abundance variations and ANOVA for variations on the size of individuals. The pink shrimp was more abundant at Saco da Mangueira, in seagrass meadows and areas of higher salinity. The blue crab was more abundant at Saco do Arraial and in lower levels of salinity. The importance of submerged vegetation for the blue crab lies in a preference of smaller crabs of the species for the seagrass meadows. It has been shown that these species choose different habitats in the estuary, and both the salinity and the presence of submerged seagrass meadows influence the selection of habitat.
- ItemFeeding habits of the deep sea shrimp aristaeopsis edwardsiana (Johnson 1867) (DECAPODA: ARISTEIDAE) on the southeastern and southern Brazilian coast(2014) Rezende, Gabriela Amaral de; Pezzuto, Paulo Ricardo; Dumont, Luiz Felipe Cestari; D'Incao, FernandoThe purpose of this paper is to present the first data concerning the diet of Aristaeopsis edwardsiana, an abundant deep-water predator off Southeastern and Southern Brazilian coast. The diet of A. edwardsiana is composed mainly of benthic and benthopelagic organisms. Crustaceans were the most important prey item in the diet, followed by sediment, fishes, cephalopods, anthozoans, polychaetes, and echinoderms. A redundancy analysis (RDA) was used to assess the relative importance of different environmental and biological variables influencing the feeding habits of Aristaeopsis edwardsiana. Cephalopods are mostly ingested during the spring, inversely, sediment was more important during the summer. Fishes are preferentially ingested by large and sexually mature individuals, while anthozoans are preferred by small individuals. Espiríto-Santo coast presented more individuals that prefer to eat more sediment than fishes or cephalopods. The majority of the stomachs were moderately empty or moderately full and few stomachs were full or very full. Significant differences were found in the percentage of stomach fullness between sex, size and female maturation. Males, small individuals and immature females had the highest values of stomach fullness. The variation in diet appears to be related to gonad development, driving temporal changes in feeding strategy.
- ItemEvolução da pescaria industrial de camarão-rosa (Farfantepenaeus brasiliensis e F. paulensis) na costa sudeste e sul do Brasil - 1968-1989(2012) Valentini, Hélio; D'Incao, Fernando; Rodrigues, Luiz Fernando; Dumont, Luiz Felipe CestariFoi analisada a série histórica de dados referentes à frota de arrasteiros de camarão-rosa do Estado de São Paulo para o período de 1968 a 1989, obtidos pelo Instituto de Pesca/SP. Este período foi separado em quatro qüinqüênios (1968-1972; 1973-1977; 1978-1983; 1984-1989) que identificam as diversas fases que caracterizaram a evolução da pescaria com base nos trabalhos de avaliação pesqueira. Uma clara mudança no padrão da pescaria foi observada ao longo dos qüinqüênios analisados. No primeiro período, a elevada CPUE das espécies-alvo sustentava bons rendimentos para a pescaria. Durante esse período, a pesca se distribuiu homogeneamente ao longo da costa do SE/S do Brasil, apresentando esforço de pesca bem distribuído latitudinalmente e concentrado nas profundidades de maior abundância do camarão-rosa (40-80 m). A partir do segundo qüinqüênio, as capturas começam a se concentrar na região central, ainda na faixa de profundidade preferencial do camarão-rosa. Nessa fase da pescaria, é notável a diminuição da abundância relativa ao longo de toda área, reflexo do aumento do esforço de pesca aplicado sobre o estoque, embora os desembarques ainda tenham mantido um nível considerado alto. O terceiro e quarto períodos são caracterizados pela queda na CPUE do estoque. A partir do terceiro qüinqüênio, a frota de arrasteiros passou a buscar novos recursos demersais, ampliando a sua área de atuação para profundidades que não mais refletem a distribuição do camarão-rosa. Como conseqüência dessa mudança no padrão de pesca, outras espécies passaram a ganhar importância nos desembarques, com o esforço migrando para profundidades maiores
- ItemPrecipitação pluvial na bacia hidrográfica da Lagoa dos Patos, no período de 1964 a 2007 e suas associações com as safras de camarão-rosa(2012) Campos, Natalia Pereira de; D'Incao, FernandoA abundância de pós-larvas no estuário depende, diretamente da salinidade, que é afetada pelo vento de quadrante sul que facilita a entrada de águas marinhas no estuário, e pela vazão provocada pela precipitação pluvial, que limita a entrada de água salina. A precipitação pluvial na região da bacia hidrográfica da Lagoa dos Patos é influenciada por sistemas atmosféricos de diferentes escalas espaciais e temporais. Nesse trabalho foram analisados dados de pluviosidade da bacia hidrográfica da Lagoa dos Patos para o período de 1964 a 2007. Os 43 anos estudados foram classificados, através da Técnica dos Quantis, em: muito secos, secos, normais, chuvosos e muito chuvosos. Através da mesma técnica, as safras de camarão-rosa também foram classificadas em: muito pequenas, pequenas, normais, altas e muito altas
- ItemCompostos nitrogenados sobre o consumo alimentar de camarão-rosa Farfantepenaeus brasiliensis(2013) Campos, Bruno Ribeiro de; Furtado, Plínio Schmidt; D'Incao, Fernando; Wasielesky Junior, Wilson Francisco Britto; Poersch, Luís Henrique da SilvaOs experimentos foram realizados para investigar os efeitos da amônia, nitrito e nitrato no consumo alimentar de juvenis de Farfantepenaeus brasiliensis. Os camarões com peso médio de 4g foram aclimatados durante 28 dias em diferentes concentrações crônicas de amônia, nitrito e nitrato. Após o período de exposição de 28 dias, 20 camarões por tratamento foram individualizados em unidades experimentais de 3 L, a fim de ser analisado o consumo de ração em função da quantidade de alimento oferecido e as sobras durante um período de 24 horas. O consumo alimentar apresentou alterações significativas (P<0,05) para os camarões expostos às concentrações de nitrito e nitrato testadas, enquanto para o tratamento com amônia, os camarões não apresentaram alterações no consumo alimentar (P>0,05). Foi verificado que o nitrito e o nitrato afetam o consumo alimentar de F. brasiliensis. Contudo, a possibilidade de que isso ocorra durante longos períodos, afetando negativamente o cultivo de espécies em cativeiro, reforçam a necessidade do manejo da qualidade de água
- ItemRange extension of the mud crab Eurypanopeus depressus (Smith, 1869) (Decapoda, Panopeidae): a new record for the coastal south of Brazil(2014) Rodrigues, Marcos Alaniz; Vieira, Rony Roberto Ramos; D'Incao, FernandoThe discovery of Eurypanopeus depressus (Decapoda: Panopeidae; Smith, 1869) on the coast of Rio Grande do Sul, Brazil suggests that the species was recently introduced, possibly due to different sources of introduction, such as the ballast water of ships. E. depressus were collected using otter-trawl net in the Patos Lagoon Estuary. Discussion focuses on the fact that the primary South American distribution derives from Uruguayan shores, and later expanded to nearby places (Brazil and Argentina). This work extends the Southern Hemisphere distribution for the species, as it was previously reported only from Argentina to Uruguay
- ItemComposition and abundance of invertebrate benthic fauna in Farfantepenaeus paulensis culture pens (Patos Lagoon estuary, southern Brazil)(2004) Soares, Roberta Borda; Peixoto, Silvio Ricardo Maurano; Bemvenuti, Carlos Emílio; Wasielesky Junior, Wilson Francisco Britto; D'Incao, Fernando; Murcia, Nícolas Pereira; Suita, SabrinaAnnual Farfantepenaeus paulensis landings in Patos Lagoon are highly variable, and pen culture in shallow estuarine areas has been developed as an alternative for artisanal fishermen. However, there is a concern about the impact of this system in the natural environment. This study was conducted to evaluate macrobenthos occurrence and variation in relation to rearing cycle and production characteristics of pen culture in Patos Lagoon estuary. Macrobenthic invertebrates, organic matter and mud content were sampled inside and outside pens (control). Six major groups (Polychaeta, Tanaidacea, Isopoda, Gastropoda, Amphipoda and Bivalvia) were observed and 11 species were identified. After 21 days of culture, benthos abundance inside pens dropped by around 86%, but no differences between the stocking densities were detected. Benthic species showed different responses to the shrimp culture, and the impact (predation and/or disturbance) on abundance of the macrobenthic invertebrate community was noted. Mud and organic matter content did not differ across sampled areas during culture period. Shrimp attained higher average weight in lowest stocking density. Although the impact of the pen culture is apparently limited to the fenced area and restricted to a short period (3–4 months), the expansion of this method of culture in the shallow waters areas of the Patos Lagoon must be monitored to ensure that greater than expected impacts do not occur
- ItemFirst record of Lepidoptera in southern brazilian salt marshes(2013) Gantes, Marcel Lucas; Carrasco, Daiane Silveira; D'Incao, FernandoSalt marshes are highly productive environments and economic importance, however, little attention is given to insects in this ecosystem, and its entomofauna unknown in Brazil. Thus, it is the first record for lepidopteran Southern Brazilian coastal marshes (32°01’S; 052°06’W)
- ItemMolecular phylogeny of western atlantic Farfantepenaeus and Litopenaeus shrimp based on mitochondrial 16s partial sequences(2001) Maggioni, Rodrigo; Rogers, Alex David; Maclean, Norman; D'Incao, FernandoPartial sequences for the 16S rRNA mitochondrial gene were obtained from 10 penaeid shrimp species: Farfantepenaeus paulensis, F. brasiliensis, F. subtilis, F. duorarum, F. aztecus, Litopenaeus schmitti, L. setiferus, and Xiphopenaeus kroyeri from the western Atlantic and L. vannamei and L. stylirostris from the eastern Pacific. Sequences were also obtained from an undescribed morphotype of pink shrimp (morphotype II) usually identified as F. subtilis. The phylogeny resulting from the 16S partial sequences showed that these species form two well-supported monophyletic clades consistent with the two genera proposed in a recent systematic review of the suborder Dendrobranchiata. This contrasted with conclusions drawn from recent molecular phylogenetic work on penaeid shrimps based on partial sequences of the mitochondrial COI region that failed to support recent revisions of the Dendrobranchiata based on morphological analysis. Consistent differences observed in the sequences for morphotype II, coupled with previous allozyme data, support the conclusion that this is a previously undescribed species of Farfantepenaeus
- ItemThe pink-shrimp trawling bycatch in the northern coast of São Paulo, Brazil, with emphasis on crustaceans(2007) Keunecke, Karina Annes; Vianna, Marcelo; Fonseca, Duane Barros da; D'Incao, FernandoThe pink shrimp trawling fishery (Farfantepenaeus brasiliensis and F. paulensis) in the Ubatuba region acts intensely on the populations of some benthic species. The impact of fisheries on herbenthic community is unknown. Samples of herbenthic community were obtained monthly from July/1995 to August/1996. The last haul from a commercial trawler operating on the northern coast of São Paulo State and the southern coast of Rio de Janeiro State was preserved (from being discarded) and identified at the species level. 29 species of crustaceans were found, but only Hepatus pudibundus, Callinectes ornatus, Dardanus insignis, Libinia spinosa, Sicyonia tipica, Portunus spinimanus, Portunus spinicarpus, and Persephona mediterranea had high occurrence and frequency values. Such species were the main crustacean itens in the bycatch of the pink shrimp fisheries in Ubatuba for the period of study. The total bycatch was about 1502 tons, composed by 119 tons of incidental catch and 1383 tons of discarded catch. Considering the study area, these values were quite high demonstrating that some species may have been overfished