Ictiofauna acompanhante da pesca de arrasto para embarcações acima de 45 hp no litoral do Paraná, Brasil

Santos, Lilyane de Oliveira; Cattani, André Pereira; Spach, Henry Louis

doi:10.20950/1678-2305.2016v42n4p816

Cited by 8 publications

(8 citation statements)

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“…The majority of fish species eaten by local franciscana dolphins are discarded by the shrimp trawl fishery or used as a by-product (e.g. fishmeal, bait) (Coelho et al ., 1986; Fischer et al ., 2011; Santos et al ., 2016).…”

Section: Discussionmentioning

confidence: 99%

Feeding habits of the franciscana dolphin (Pontoporia blainvillei) in south-eastern Brazil

et al. 2020

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This study evaluated the feeding habits of the franciscana dolphin (Pontoporia blainvillei) in south-eastern Brazil. Stomach contents were collected from a total of 145 dead specimens found incidentally caught by fishing vessels or stranded between 2005 and 2015. Fish otoliths, cephalopod beaks and whole non-digested prey were used for prey species identification. A total of 9337 prey items were identified, including 26 species of teleost fishes and three species of cephalopods. The most important prey families were Sciaenidae among fish and Loliginidae among cephalopods. Franciscana dolphins tended to feed on small fish (mean = 5.25 cm) and cephalopods (mean = 8.57 cm). The index of relative importance (IRI) showed that Pellona harroweri and Doryteuthis plei were the most important prey for both males and females. The PERMANOVA test confirmed that there is no significant difference between the feeding habits of different sexes, but detected a significant difference among seasons. Overall, our results show that franciscana dolphins are predominantly ichthyophagous and non-selective in relation to the type of prey, feeding on pelagic, demersal and pelagic-demersal prey.

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Section: Discussionmentioning

confidence: 99%

Feeding habits of the franciscana dolphin (Pontoporia blainvillei) in south-eastern Brazil

et al. 2020

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“…The species within the Ariidae family are of high commercial value in the South-western Atlantic (Freire & Pauly, 2005), Madmango sea catfish Cathorops spixii (Spix & Agassiz, 1829) being one of the most important. This is a benthic species widely distributed in estuaries and continental shelf between latitudes 13°N and 25°S (Dantas et al ., 2013; Denadai et al ., 2013; Santos et al ., 2016) and it has been characterized as a K-strategist fish with parental care and oral incubation of eggs and juveniles (Lima et al ., 2012). The artisanal fishery's mean annual catch of C. spixii in Brazil (1995–2000) was 2000 tons (Freire & Pauly, 2005), also being by-catch fauna of the shrimp fishery (Graça Lopes et al ., 2002; Cattani et al ., 2011).…”

Section: Introductionmentioning

confidence: 99%

Spatial environmental variability of natural markers and habitat use ofCathorops spixiiin a neotropical estuary from otolith chemistry

et al. 2020

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The goal of this study was to study the distribution of potential habitat markers (Sr/Ca, Ba/Ca, Mn/Ca and Li/Ca) in water from the Paranaguá Estuarine Complex (Brazil) and to study habitat use patterns of Cathorops spixii through ontogeny employing otolith microchemistry. Fish were caught from three sampling sites while water samples were collected at eight stations covering a salinity range from 4.5–33. Elemental concentrations in otolith and water were determined by LA-ICP-MS and ICP-MS, respectively. When the relationship between salinity and elements or ratios in water was studied, significant positive relationships were found for Sr, Li, Ca, Sr/Ca, and negative for Ba, Mn, Ba/Ca and Mn/Ca (P < 0.05). No relationship was observed between water Li/Ca and salinity. A significant positive correlation was found between otolith edge Sr/Ca and salinity (r = 0.63; P < 0.05), positioning this ratio as the best natural tag for reconstructing environmental histories of C. spixii. Change point analysis (CPA) based on otolith Sr/Ca signature through ontogeny revealed potential migrations between environments with different salinity. According to CPA, the number of displacements among different salinities ranged from 3–9 (6.1 ± 1.9), suggesting high plasticity in the migratory patterns. Ba/Ca, Li/Ca and Mn/Ca peaks were observed on the outer margin of the primordium, and could be influenced by physiological, environmental and maternal factors.

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“…Among the variables, transparency presented greater heterogeneity in the monthly mean values, with larger variations in the dry season between the two areas, and lower values in the Northern area; the lowest values can be related to the presence of barrier coast that facilitate the resuspension of sediments towards the interior of the Paranaguá Bay in periods of high frequency of cold fronts, in addition to the continental water inflow that contains high concentrations of suspended matter (Veiga et al, 2004). Studies developed on the continental shelf of the Paraná State indicate that fish community structure is characterized by the presence of key species, with remarkable dominance in number and weight of species of the family Sciaenidae (Cattani et al, 2011;Santos et al, 2016). Key species are those that make up the community base and, when absent, result in a substantially different community (Mahon and Smith, 1989).…”

Section: Discussionmentioning

confidence: 99%

Ichthyofauna in the Inner Continental Shelf Next to the Paranaguá Estuarine Complex, Southern Brazil

Santos¹,

Schwarz²,

Pichler³

et al. 2021

Bol. Inst. Pesca

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The composition and structure of fish assemblages in the inner continental shelf of the Paraná State are affected by cold fronts and the rainfall regime. Data from fishing activities in this region, as well as the analysis of environmental characteristics, are the main tools available for understanding fish dynamics, under influence of increasing human activities. In order to better understand patterns and temporal variations in fish assemblages in the inner continental shelf of the Paraná State, a total of 24 double trawls were performed with an otter trawl between August 2000 and July 2001, in two sampling areas, the North area in front of the northern mouth of the Paranaguá Estuary Complex, and the South area, in front of the Leste beach. A total of 45,277 fish specimens belonging to 35 families and 97 species were caught. Sciaenidae was the most abundant family, with 37.1% of the total number of individuals caught, and with the highest richness (18 species). Statistical analyses evidenced significant differences in environmental characteristics and in fish fauna, and that both areas disturbances were observed in the fish assemblages during the dry and wet season, being more intense in the Southern area, disturbances that would be related to the shrimp fishing present in the two areas sampled in this study.

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Ictiofauna acompanhante da pesca de arrasto para embarcações acima de 45 hp no litoral do Paraná, Brasil

Cited by 8 publications

References 0 publications

Feeding habits of the franciscana dolphin (Pontoporia blainvillei) in south-eastern Brazil

Feeding habits of the franciscana dolphin (Pontoporia blainvillei) in south-eastern Brazil

Spatial environmental variability of natural markers and habitat use ofCathorops spixiiin a neotropical estuary from otolith chemistry

Ichthyofauna in the Inner Continental Shelf Next to the Paranaguá Estuarine Complex, Southern Brazil

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