Pesca associada entre golfinhos e aves marinhas

Monteiro‐Filho, Emygdio L. A.

doi:10.1590/s0101-81751992000100005

Cited by 15 publications

(15 citation statements)

References 3 publications

(5 reference statements)

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“…The observed seabirds in the present study were previously described in interactions with S. guianensis (e.g. Monteiro-Filho, 1992;Lodi and Hetzel, 2000;Cremer et al, 2004;Domit, 2006;Santos and Rosso, 2007) and they have different foraging tactics. Our observations were similar to the ones described in the literature.…”

Section: Discussionsupporting

confidence: 62%

“…In Brazil, most reports have involved associations between Guiana dolphins, Sotalia guianensis (Van Bénèden, 1864), and seabirds (e.g. Monteiro-Filho, 1992;Lodi and Hetzel, 2000;Cremer et al, 2004;Domit, 2006;Santos and Rosso, 2007). S. guianensis is commonly found in coastal and estuarine waters of South and Central America in the Western Atlantic Ocean (Flores, 2002), which makes the species the main target for observations of such interactions in Brazilian waters.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the main objective of the present study was to describe the characteristics of the feeding associations between S. guianensis and seabirds observed in the Lagamar estuary. Two previous studies conducted in two distinct areas of the same estuary listed several seabird species, as well as described several aspects of such associations (Monteiro-Filho, 1992;Domit, 2006). However, both studies gathered data from land platforms in restricted subsets of the estuary.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Discussionsupporting

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2010

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“…Such subgroups may arrange themselves in circles, possibly to surround shoals of fish. Movements in opposite directions may also be observed ( = cross fishing by MONTEIRO-FILHO (1992) for S. guianensis). On various occasions the species can be seen fishing on the sandbanks during high tide, at depths of between 2 and 5 m.…”

Section: Resultsmentioning

confidence: 99%

The occurrence of Pontoporia blainvillei (Gervais & d'Orbigny) (Cetacea, Pontoporiidae) in an estuarine area in southern Brazil

Cremer

Simões‐Lopes

2005

Rev. Bras. Zool.

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The toninha, or franciscana, Pontoporia blainvillei (Gervais & D'Orbigny, 1844), is an endemic species of cetacean of the southwestern Atlantic Ocean. There is little information on the occurrence of this species in its natural environment due to the great difficulty in sighting it. Systematized and non-systematized observations of franciscanas were made from December 1996 through November 2001 at Babitonga Bay, on the northern coast of Santa Catarina State, southern Brazil. The observations were made from small motorboats. A total of 79 observations were made, totaling 561 individuals. Up to 59.5% of the groups consisted of over four individuals and the average group size was seven. Calves were present in 30.4% of the observations. The species was found throughout the year within the bay and preferential areas were identified. Calves were registered during all seasons. Data are presented on the behavior (feeding, traveling, aerial behavior and behavior relating to the boats) and on inter-specific interactions with terns, cormorants [Phalacrocorax brasilianus (Gmelin, 1789)] and brown boobies [Sula leucogaster (Boddaert, 1783)]. The species is sympatric with the estuarine dolphin Sotalia guianensis (P. J. Van Bénéden, 1864) in the bay, but there was no record of interaction between them. The area of the bay represents an important refuge for the franciscana species.

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“…However, foraging success by waterfowl can be influenced by environmental factors such as water depth, substrate and prey size. As a matter of fact, Brazilian cormorants can dive as deep as 20 m, what would imply on a distinct foraging strategy (Duffy et al 1986, Wilson and Wilson 1988, Monteiro-Filho 1992, Carbone and Houston 1994, Sapoznikow and Quintana 2003. Therefore, our data pertains mostly to shallow waters.…”

Section: Discussionmentioning

confidence: 94%

Foraging behavior of Brazilian cormorant, Nannopterum brasilianus (Suliformes: Phalacrocoracidae)

Gheler‐Costa¹,

Comin²,

Gilli³

et al. 2018

Zoologia

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ABSTRACT. Although the concept of optimal foraging has been extensively discussed, foraging efficiency is difficult to assess in vertebrates. In this study, we determined the foraging efficiency of the Brazilian cormorant, Nannopterum brasilianus Gmelin, 1789, by the direct, ad libitum observation of a group of four to thirteen individuals in an artificial pond at the University of São Paulo, Piracicaba, state of São Paulo, southeastern Brazil. Although this study was carried out in a highly anthropic environment, we can still conclude that the Brazilian cormorant is a relatively efficient browser and short-term diver. In anthropic environments, foraging success depends on the amount of time these birds spend diving, and stealing food is less common.Stealing occurs at relatively low rates but tends to be an efficient way to get food.

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Pesca associada entre golfinhos e aves marinhas

Cited by 15 publications

References 3 publications

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

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

The occurrence of Pontoporia blainvillei (Gervais & d'Orbigny) (Cetacea, Pontoporiidae) in an estuarine area in southern Brazil

Foraging behavior of Brazilian cormorant, Nannopterum brasilianus (Suliformes: Phalacrocoracidae)

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