scholarly journals Trophic ecology and foraging areas of cetaceans sampled in the coastal waters of south-eastern Brazil assessed through skin δ13C and δ15N – CORRIGENDUM

2021 ◽  
pp. 1-1
Author(s):  
Victor Uber Paschoalini ◽  
Genyffer Cibele Troina ◽  
Laura Busin Campos ◽  
Marcos César de Oliveira Santos
Keyword(s):  
Coastal Waters ◽  
Trophic Ecology ◽  
Δ13c And Δ15n ◽  
South Eastern ◽  
Eastern Brazil

Trophic ecology and foraging areas of cetaceans sampled in the coastal waters of south-eastern Brazil assessed through skin δ13C and δ15N

2021 ◽  
pp. 1-10
Author(s):  
Victor Uber Paschoalini ◽  
Genyffer Cibele Troina ◽  
Laura Busin Campos ◽  
Marcos César de Oliveira Santos
Keyword(s):  
Habitat Use ◽  
Coastal Waters ◽  
Trophic Ecology ◽  
Trophic Position ◽  
Trophic Levels ◽  
Eastern Coast ◽  
Cetacean Species ◽  
Δ13c And Δ15n ◽  
South Eastern ◽  
Eastern Brazil

Abstract We investigated the habitat use and feeding ecology of 10 cetacean species encountered along the south-eastern coast of Brazil (24–26°S) using carbon (δ13C) and nitrogen (δ15N) stable isotopes. Hierarchical cluster analysis distinguished two main groups based on their isotopic patterns. One group included migratory baleen whales (Megaptera novaeangliae and Eubalaena australis) with the lowest δ13C and δ15N values, reflecting baseline isotopic values of their Subantarctic feeding grounds and consumption of lower trophic level prey. Resident species and those occasionally occurring in Brazilian coastal waters highly differed from the migratory whales in their isotopic values. In this group, Tursiops truncatus had the highest δ13C and δ15N values, indicating coastal habits and relatively higher trophic position. Similar δ13C values were observed in Sotalia guianensis, Pontoporia blainvillei, Orcinus orca and Steno bredanensis. However, the former two species had lower δ15N values than the latter two, indicating different trophic positions. The relatively lower δ13C values observed in Stenella frontalis suggest greater influence of pelagic prey in their diet. Furthermore, the lower δ13C values observed in Delphinus delphis and Balaenoptera edeni were associated with upwelling events that occur along the region, affecting the isotopic values of their main prey. Juvenile M. novaeangliae had higher δ13C and δ15N than the adults, which may indicate feeding in areas with different isoscapes and consumption of pelagic schooling fish with relatively higher trophic levels than krill. This study provides preliminary information that are useful to understand the habitat use and coexistence of cetacean species occurring in south-eastern Brazil.

Isotopic, trace element and nutrient characterization of coastal waters from Ubatuba inner shelf area, south-eastern Brazil

2008 ◽  
Vol 76 (3) ◽  
pp. 522-542 ◽  
Author(s):  
P.P. Povinec ◽  
J. de Oliveira ◽  
E.S. Braga ◽  
J.-F. Comanducci ◽  
J. Gastaud ◽  
...  
Keyword(s):  
Trace Element ◽  
Coastal Waters ◽  
Shelf Area ◽  
Inner Shelf ◽  
South Eastern ◽  
Eastern Brazil

scholarly journals Feeding habits of Guiana dolphins, Sotalia guianensis, from south-eastern Brazil: new items and a knowledge review

2012 ◽  
Vol 92 (8) ◽  
pp. 1723-1733 ◽  
Author(s):  
Xênia Moreira Lopes ◽  
Ednilson da Silva ◽  
Manuela Bassoi ◽  
Roberta Aguiar dos Santos ◽  
Marcos César de Oliveira Santos
Keyword(s):  
Fish Species ◽  
Coastal Waters ◽  
Feeding Habits ◽  
Regression Equations ◽  
Estuarine Waters ◽  
Sotalia Guianensis ◽  
South Eastern ◽  
Cephalopod Species ◽  
Eastern Brazil ◽  
Important Fish

This study presents new information on feeding habits of Guiana dolphins, Sotalia guianensis, in south-eastern Brazil, together with new regression equations to evaluate the weight and length of fish from otoliths, showing an overview on the knowledge about this species’ diet in this area. Eighteen stomach contents had been analysed and compared to 180 samples collected in another eight feeding studies. The analysed specimens were either incidentally caught in gillnets used in coastal waters by the fleet based in the Cananéia main harbour (25°00′S 47°55′W), south of São Paulo State, or found dead in inner waters of the Cananéia estuary between 2003 and 2009. Based on the index of relative importance analysis, the most important fish species were the banded croaker, Paralonchurus brasiliensis. Doryteuthis plei was the most representative cephalopod species. Stellifer rastrifer was the most important fish species observed in dolphins in inner estuarine waters and P. brasiliensis in recovered dolphins from coastal waters. Loliguncula brevis is the only cephalopod species reported from dolphins found in inner estuarine waters up to date. Doryteuthis plei was the most important cephalopod species observed in coastal dolphins. When considering other feeding studies, the most representative fish family in the diet of S. guianensis was Sciaenidae, which is mainly represented by demersal fishes. The main preys of S. guianensis are abundant in the studied areas, which may indicate an opportunistic feeding habit. The majority of them are not the most important target species by the commercial fishery in south-eastern Brazil.

Diet of the amphi-Atlantic scaphopod Fissidentalium candidum in the deep waters of Campos Basin, south-eastern Brazil

2016 ◽  
Vol 97 (6) ◽  
pp. 1259-1266
Author(s):  
Renato Junqueira De Souza Dantas ◽  
Lazaro Luiz Mattos Laut ◽  
Carlos Henrique Soares Caetano
Keyword(s):  
Trophic Ecology ◽  
Inorganic Material ◽  
Dietary Diversity ◽  
Feeding Habits ◽  
High Rate ◽  
South Eastern ◽  
Deep Waters ◽  
Campos Basin ◽  
Eastern Brazil ◽  
Polymetallic Nodules

Specimens of Fissidentalium candidum collected at Campos Basin, south-eastern Brazil, had their diet investigated in order to assess its feeding habits. Benthic prey exceeded the planktonic ones as expected and Foraminifera constituted the most frequent prey taxa, comprising about 99.5% of the scaphopod diet; the remaining components included a few molluscs (gastropods, bivalves and scaphopods), a nematode, an ostracod crustacean, fish otoliths, unknown partial organisms and inorganic material (e.g. sediment grains and polymetallic nodules). Amongst the species previously studied, F. candidum stood out by presenting the highest dietary diversity (H = 3.35) and species richness (N = 118). Predator and prey dimensions were not correlated and no spatial variation was observed in the diet amongst the three collection sites in the mid-slope of Campos Basin. Generalism, high rate of rare or unimportant species and high contribution of within-phenotype component to the niche width were important features of the trophic ecology of F. candidum. Inhabiting the deep water of Campos Basin, this dentaliid obtained most of its energy from the benthic microfauna, being a specialized foram predator with moderate preference for, and moderate selection against, several species.

The trophic ecology of marine catfishes in south-eastern Brazil

2020 ◽  
Vol 100 (1) ◽  
pp. 133-142
Author(s):  
Pedro V. Gatts ◽  
Marcos A. L. Franco ◽  
Marcelo G. Almeida ◽  
Ilana R. Zalmon ◽  
Ana Paula M. Di Beneditto ◽  
...  
Keyword(s):  
Total Mass ◽  
Total Mercury ◽  
Trophic Ecology ◽  
Niche Overlap ◽  
Mercury Content ◽  
Isotopic Niche ◽  
South Eastern ◽  
Eastern Brazil ◽  
Janeiro State ◽  
Prey Items

AbstractThe stable isotope ratios of carbon (δ13C) and nitrogen (δ15N) and total mercury concentrations (THg) of the three marine catfish species Aspistor luniscutis, Bagre bagre and Genidens genidens were evaluated to understand their trophic relationship in northern Rio de Janeiro state, south-eastern Brazil. The δ13C was similar among the three marine catfishes, whereas δ15N was similar in A. luniscutis and B. bagre and lower in G. genidens. THg was higher in G. genidens and lower in B. bagre. The greater assimilation of Sciaenidae fishes and squids by A. luniscutis and B. bagre resulted in smaller isotopic niche areas and trophic diversity but higher isotopic niche overlap, trophic redundancy and evenness. For G. genidens, the similar assimilation of all prey items resulted in the broadest isotopic niche among the marine catfishes. The higher mercury content in G. genidens is consistent with an increased important contribution of prey with a higher Hg burden. The bioaccumulation process was indicated by significant correlations of δ15N and THg with total length and total mass. Additionally, a significant correlation between THg and δ15N reflected the biomagnification process through the food web.

Strandings and feeding records of Bryde's whales (Balaenoptera edeni) in south-eastern Brazil

2004 ◽  
Vol 84 (4) ◽  
pp. 857-859 ◽  
Author(s):  
Salvatore Siciliano ◽  
Marcos César de Oliveira Santos ◽  
André F.C. Vicente ◽  
Fernando S. Alvarenga ◽  
Émerson Zampirolli ◽  
...  
Keyword(s):  
Coastal Waters ◽  
East Coast ◽  
Bottlenose Dolphins ◽  
South Eastern ◽  
Coryphaena Hippurus ◽  
Eastern Brazil ◽  
Sula Leucogaster ◽  
Feeding Activities ◽  
Marine Vertebrates ◽  
Janeiro State

Information on Balaenoptera edeni strandings along the Brazilian south-east coast and feeding associations with other marine vertebrates are reported. A total of 19 strandings were observed from 1972 to 2003 along ≈1200 km of coast. Strandings were evenly distributed among seasons with no distinguishable peaks. Besides the stranding data, opportunistic observations on Bryde's whales engaged in feeding activities were reported from nine cruises along São Paulo and Rio de Janeiro State coasts (22–24°S). Bryde's whales were observed preying on Brazilian sardines (Sardinella brasiliensis) in at least three events, and possibly two others. Associations with other marine vertebrates were observed, and included dolphin fish (Coryphaena hippurus), little tunny (Euthynnus alletteratus), unidentified sharks, terns (Sterna hirundinacea, Sterna spp.), brown boobies (Sula leucogaster), frigate birds (Fregata magnificens), parasitic jaeger (Stercorarius cf. parasiticus), albatrosses (Thalassarche spp.), and bottlenose dolphins (Tursiops truncatus). Stranding data and on-board observations support the hypothesis that Bryde's whales are common in coastal waters of south-eastern Brazil.

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