Dieta de Sula leucogaster Boddaert (Sulidae, Aves), nas Ilhas Moleques do Sul, Florianópolis, Santa Catarina, Brasil

Branco, Joaquim Olinto; Fracasso, Hélio Augusto Alves; Machado, Irecê Farina; Bovendorp, Marcos S.; Verani, José Roberto

doi:10.1590/s0101-81752005000400033

Cited by 22 publications

(17 citation statements)

References 10 publications

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“…The family Sciaenidae contributed with the highest number of species analyzed, as also reported in other studies (BRANCO et al, 2006;SILVA-COSTA;BUGONI, 2013) which recognize the importance of this family in the composition of the diet of seabirds in southern Brazil. A great representativeness of the family Sciaenidae in discards and consequently in the pellets reflects the structure of the fish community of the southeast-south region of Brazil, where this family is dominant both in number of species and biomass .…”

Section: Discussionsupporting

confidence: 82%

Does the closed fishing season influence the ichthyofauna consumed by Larus dominicanus?

2017

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Does the closed fishing season influence the ichthyofauna consumed by Larus dominicanus?Fish that are incidentally caught by shrimp trawling represent a predictable and abundant resource for feeding several bird species, especially for the gull Larus dominicanus. This fishing activity is subject to disruptions throughout the year during closed fishing seasons, when other fishing modalities are exercised, which can alter the composition, abundance and size of the fish bycatch. This study evaluated the influence of the restriction of fishing period of shrimp (closed season) on the diet of L. dominicanus, on the Paraná State coast. From December 2013 to August 2014, 10 pellets were collected per month in two distinct areas that have shrimp trawl fishery as the main economic activity: one continental and another in an estuarine island. In total, 920 fish were identified, divided into four families and 15 species, especially the family Sciaenidae with 11 species. There were differences in abundance and biomass of species between areas and between seasons of pre-closure, closure and post-closure. Differences for the mean total length of the species were only detected between the pre-closed and closed seasons in one area. This study evidenced the strong relationship between L. dominicanus and the shrimp trawl fishery, the species composition identified in the pellets and their respective morphometric measurements follow the same pattern of the literature for fish discarded in trawling activities. As capturas incidentais de peixes no arrasto do camarão representam um recurso abundante para a alimentação de muitas aves, sobretudo para a gaivota Larus dominicanus. O presente estudo avaliou a influência do defeso da pesca de arrasto do camarão sobre a dieta de L. dominicanus no litoral do estado do Paraná. Entre dezembro de 2013 e agosto de 2014 foram coletados 10 pellets alimentares por mês em duas áreas distintas, em períodos sem e com a influência do defeso do camarão sete-barbas. Ao todo, foram identificados 920 peixes, divididos em quatro famílias e 15 espécies, com destaque para a família Sciaenidae, com 11 espécies. Foram identificadas diferenças na abundância e biomassa das espécies entre as áreas e entre os períodos de pré-defeso, defeso e pós-defeso. Diferenças em relação ao comprimento total médio das espécies só foram encontradas entre o pré-defeso e defeso em uma das áreas. Com este trabalho, foi possível observar a forte relação entre L. dominicanus e a pesca de arrasto do camarão, a composição das espé-cies identificadas nos pellets e as estimativas de comprimento seguem o mesmo padrão do que a literatura traz para os peixes descartados nas atividades de arrasto. resumo Descritores: Descarte de pesca, Pesca do camarão, Defeso, Aves marinhas, Brasil. AbstrAct

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Section: Discussionsupporting

confidence: 82%

Does the closed fishing season influence the ichthyofauna consumed by Larus dominicanus?

2017

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“…Several studies on seabird feeding habits in closer areas (see Krul, 2004;Branco et al, 2005;Barquete et al, 2008) showed that they feed on almost the same abundant estuarine fishes reported to be preyed by S. guianensis. The mean prey size observed for brown boobies, Neotropic cormorants and Guiana dolphins, ranging from 9 to 13 cm in length, were approximately the same (see Santos et al, 2002;Krul, 2004;Branco et al, 2005;Barquete et al, 2008). Therefore, based on the described scenario, S. guianensis aggregations engaged in foraging and feeding activities may act as visual sign to seabirds.…”

Section: Discussionmentioning

confidence: 99%

Feeding associations between Guiana dolphins, Sotalia guianensis (Van Bénèden, 1864) and seabirds in the Lagamar estuary, Brazil

et al. 2010

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The main objective of the present study was to describe the characteristics regarding interactions between Guiana dolphins, Sotalia guianensis and seabirds in feeding associations in two distinct areas of the Lagamar estuary, Brazil. Boat-based surveys directed towards photo-identification studies of S. guianensis were conducted in the Cananéia Estuary (CE) (25° 01' S and 47° 55' W) from July 2004 to March 2008, as well as in the Paranaguá Estuarine Complex (PEC) (25° 24' S and 48° 24' W) from April 2006 to February 2008. On all occasions when seabirds were observed engaging in multi-species feeding associations with S. guianensis, data on species involved and their numbers were gathered. From 435 observed groups of S. guianensis in the CE, 38 (8.7%) involved interactions with seabirds. In the PEC, from the 286 observed groups, 32 (11.2%) involved the mentioned interactions. The following seabirds were observed in feeding associations with S. guianensis: Fregata magnificens, Sula leucogaster, Phalacrocorax brasilianus, and Sterna sp. In the CE, S. leucogaster was more commonly observed in feeding associations with Guiana dolphins (χ² = 22.84; d.f. = 3, p < 0.05), while in the PEC no differences were reported when comparing seabird species (χ² = 5.78; d.f.=3, p = 0.1223). In the CE, feeding associations were significantly more frequent in inner waters (subset A0; χ² = 9.52; d.f. = 2, p < 0.05), and in winter (χ² = 12.46; d.f. = 1, p < 0.05). Within these events, 44.7% of the association groups were composed by more than one seabird species. Seasonality in feeding associations was also observed in the PEC (χ² = 4.76; d.f. = 1, p < 0.05), with same patterns observed in the CE. Interactions were more frequent in inner waters of the Laranjeiras bay, PEC (χ² = 11.65; d.f. = 2, p < 0.05). Within these events, 74.2% of the association groups were composed by more than one seabird species. Water transparency, prey and seabird abundance and distribution, cetacean group size, and the life cycle of prey and seabirds are listed as the main factors addressing multi-species feeding associations in the Lagamar estuary.Keywords: Cetacea, feeding associations, Sotalia guianensis, seabirds, multi-species interactions. Associações de alimentação entre o boto-cinza (Sotalia guianensis) (Van Bénèden, 1864) e aves marinhas no estuário do Lagamar, BrasilResumo O objetivo principal do presente estudo foi de descrever as características a respeito das associações de alimentação entre o boto-cinza, Sotalia guianensis, e aves marinhas em duas áreas distintas do estuário do Lagamar, Brasil. Investigações efetuadas a partir de embarcação e direcionadas a estudos de foto-identificação de S. guianensis foram conduzidas (χ² = 5,78; g.l. = 3, p = 0,1223). No EC, associações de alimentação foram significativamente mais freqüentes em águas internas (χ² = 9,52; g.l. = 2, p < 0,05) e no inverno Santos, MCO. et al.

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“…The two studied species feed on epipelagic flying fish (Exocoetidae) and flying squids (Ommastrephidae) (Diamond & Schreiber, 2002;Schreiber & Norton, 2002), or opportunistically on demersal fish from fisheries discards (Calixto-Albarrán & Osorno, 2000;Branco et al, 2005Branco et al, , 2007. Nevertheless, their feeding strategies are markedly different (Schreiber & Clapp, 1987).…”

Section: Discussionmentioning

confidence: 99%

Osteology of the feeding apparatus of Magnificent Frigatebird Fregata magnificens and Brown Booby Sula leucogaster (Aves: Suliformes)

2017

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Dieta de Sula leucogaster Boddaert (Sulidae, Aves), nas Ilhas Moleques do Sul, Florianópolis, Santa Catarina, Brasil

Cited by 22 publications

References 10 publications

Does the closed fishing season influence the ichthyofauna consumed by Larus dominicanus?

Does the closed fishing season influence the ichthyofauna consumed by Larus dominicanus?

Feeding associations between Guiana dolphins, Sotalia guianensis (Van Bénèden, 1864) and seabirds in the Lagamar estuary, Brazil

Osteology of the feeding apparatus of Magnificent Frigatebird Fregata magnificens and Brown Booby Sula leucogaster (Aves: Suliformes)

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