Two new Hyalonema species (Hyalonematidae: Amphidiscosida) from eastern and south-eastern Brazil, and further Hexactinellida (Porifera) collected from seamounts off south-eastern Brazil by the RV ‘Marion Dufresne’ MD55 expedition

2009 ◽  
Vol 89 (6) ◽  
pp. 1243-1250 ◽  
Author(s):  
Konstantin R. Tabachnick ◽  
Larisa L. Menshenina ◽  
Daniela A. Lopes ◽  
Eduardo Hajdu
Keyword(s):  
New Species ◽  
Atlantic Ocean ◽  
Rio De Janeiro ◽  
Western Atlantic ◽  
South Eastern ◽  
First Finding ◽  
Campos Basin ◽  
Eastern Brazil ◽  
Janeiro State ◽  
Hexactinellid Sponges

Descriptions of hexactinellid sponges collected by the RV ‘Marion Dufresne’ MD55 expedition on the Vitória–Trindade seamounts chain (off Espírito Santo State, south-eastern Brazil) in 1987 and stored in the MNHN (Muséum National d'Histoire Naturelle in Paris) are presented. Hyalonema (Cyliconema) conqueror sp. nov. (the first finding of this subgenus in the Atlantic Ocean) and H. (Prionema) dufresnei sp. nov. (the second record of this subgenus for the Atlantic Ocean) are described as new species. The holotype of H. (C.) conqueror sp. nov. was collected with a ROV at Campos Basin (off Rio de Janeiro State, south-eastern Brazil), while the paratypes originated from Vitória–Trindade seamounts chain and off Bahía State (eastern Brazil). Other hexactinellids reported here, Farrea sp., Sarostegia aff. oculata, Aphrocallistes aff. beatrix, Dactylocalyx aff. subglobosus and Euplectella suberea were known before to be widely distributed in the Atlantic Ocean. The total number of hexactinellid sponges known from Brazil has risen to 15 and from the south-western Atlantic to 23.

Stomach contents of the marine tucuxi dolphin (Sotalia guianensis) from Rio de Janeiro, south-eastern Brazil

2007 ◽  
Vol 87 (1) ◽  
pp. 253-254 ◽  
Author(s):  
Ana Paula Madeira Di Beneditto ◽  
Salvatore Siciliano
Keyword(s):  
Rio De Janeiro ◽  
Feeding Habits ◽  
Stomach Contents ◽  
Additional Information ◽  
Sotalia Guianensis ◽  
South Eastern ◽  
Eastern Brazil ◽  
Trichiurus Lepturus ◽  
Cynoscion Guatucupa ◽  
Janeiro State

Along the central coast of Rio de Janeiro State (22°25′S–23°00′S), south-eastern Brazil, the marine tucuxi dolphin (Sotalia guianensis) feeds on neritic prey that are distributed through the water column and are abundant all year round. The most frequently found species were the teleost fish Trichiurus lepturus, Cynoscion guatucupa, Isopisthus parvipinnis and Porichthys porossisimus. Fish species were more important than cephalopod species in the diet of the marine tucuxi. Back calculations of prey sizes indicated that they feed mainly on young specimens. The present study provided additional information on the feeding habits of the marine tucuxi dolphin.

Comparative analysis of rocky reef fish community structure in coastal islands of south-eastern Brazil

2008 ◽  
Vol 89 (3) ◽  
pp. 609-619 ◽  
Author(s):  
Laís de Carvalho Teixeira Chaves ◽  
Cassiano Monteiro-Neto
Keyword(s):  
Reef Fish ◽  
Rio De Janeiro ◽  
Fish Community ◽  
Fish Distribution ◽  
Rocky Reef ◽  
Total Density ◽  
Western Atlantic ◽  
South Eastern ◽  
Eastern Brazil ◽  
Reef Fish Community

Reef fish community structures at three sites in the state of Rio de Janeiro (Pedra Vermelha (PV), Cabo Frio Island—Arraial do Cabo; Mãe Island (MI), Itaipu—Niterói; Comprida Island (CI), Cagarras Archipelago—Rio de Janeiro) were investigated to assess differences in fish species composition, density and distribution of trophic groups, between sites, correlating the observed patterns of fish distribution with environmental factors. Thirty-six visual strip-transects yielded 67 species of 34 families. Studied locations shared at least 40% of all species, mostly of western Atlantic distribution. The three sites presented significant differences on diversity, density and species dominance. CI presented the highest values, except for total density, which was higher at PV, probably due to its partial degree of protection. MI showed the lowest values, suggesting possible impacts from the proximity to the shore. The main trophic categories were omnivores followed by mobile invertebrate feeders, in similarity to what was previously observed for south-eastern Brazil. Inherent habitat features of each location regarding depth, declivity, visibility and rugosity resulted in different species distribution and dominance patterns.

Movements of the rough-toothed dolphin (Steno bredanensis) in Rio de Janeiro State, south-eastern Brazil

2012 ◽  
Vol 5 ◽  
Author(s):  
Liliane Lodi ◽  
Rodrigo Hipolito Tardin Oliveira ◽  
Luciana Duarte Figueiredo ◽  
Sheila Marino Simão
Keyword(s):  
Rio De Janeiro ◽  
South Eastern ◽  
Eastern Brazil ◽  
Steno Bredanensis ◽  
Janeiro State

A new species of Latrunculia (Biannulata) (Porifera: Demospongiae) from Rio de Janeiro, south-eastern Brazil

2012 ◽  
Vol 43 (2) ◽  
pp. 105-111
Author(s):  
Caroline Cordonis ◽  
Fernando Moraes ◽  
Guilherme Muricy
Keyword(s):  
New Species ◽  
Rio De Janeiro ◽  
South Eastern ◽  
Eastern Brazil ◽  
A New Species

Amorphinopsis (Halichondrida: Demospongiae) from the Atlantic Ocean, with the description of a new species

2004 ◽  
Vol 84 (5) ◽  
pp. 925-930 ◽  
Author(s):  
Mariana de S. Carvalho ◽  
Eduardo Hajdu ◽  
Beatriz Mothes ◽  
Rob W.M. van Soest
Keyword(s):  
New Species ◽  
Atlantic Ocean ◽  
Rio De Janeiro ◽  
The Other ◽  
Exposed Surface ◽  
Paulo State ◽  
First Time ◽  
A New Species ◽  
Janeiro State ◽  
Northern Sector

A species of the genus Amorphinopsis is described for the first time for the Atlantic Ocean. The new species was described based on the study of 25 specimens, collected in the area of the São Sebastião Channel and its environs (northern sector of São Paulo State coastline) and in the Cabo Frio region (Rio de Janeiro State). The form is massive cushion-shaped, lobate, occasionally encrusting. The megascleres are styles [160–260 (N=20)/5–10 (N=10) μm; length/thickness] and oxeas [150–900 (N=100)/5–18 (N=20) μm]. Amorphinopsis atlantica sp. nov. differs from the other species of Amorphinopsis by its colour, dark-greyish-green with or without yellow tinges on the exposed surface, and the smaller size of its oxeas. Amorphinopsis excavans is the closest species to the Brazilian material, but can still be set apart by a series of smaller traits, such as oxeas and styles never overlapping (the smaller oxea is always larger than the larger style).

Deep seaYoldiella(Pelecypoda: Protobranchia: Yoldiidae) from Campos Basin, Rio de Janeiro, Brazil

2010 ◽  
Vol 91 (2) ◽  
pp. 513-529 ◽  
Author(s):  
Natalia Pereira Benaim ◽  
Ricardo Silva Absalão
Keyword(s):  
Atlantic Ocean ◽  
Deep Sea ◽  
Rio De Janeiro ◽  
First Record ◽  
Brazilian Coast ◽  
Southern Brazil ◽  
Western Atlantic ◽  
Lack Of Information ◽  
Campos Basin ◽  
Unknown Species

Despite the increasing number of reports on the deep-sea molluscs from the south-western Atlantic, we know very little about the protobranchs. The lack of information on the protobranch Pelecypoda off southern Brazil is reflected in the genusYoldiella. This contribution is part of an effort to increase the knowledge about this group off the Brazilian coast. Eight species ofYoldiellaare recognized here. ForYoldiella biguttata, previously reported from Brazil, the known distribution is extended southwards to the Campos Basin. ForYoldiella similisthis is the first record in the western Atlantic Ocean. ForYoldiella extensaandYoldiellaaff.jeffreysithis is the first record for Brazil. Four previously unknown species are described,Yoldiella lapernoisp. nov.,Yoldiella paranapuaensissp. nov.,Yoldiella arariboiasp. nov. andYoldiella curupirasp. nov. Considering only conchological features for the Atlantic species we could propose some clusters of species ofYoldiella.

Heavy metal distribution in two cetacean species from Rio de Janeiro State, south-eastern Brazil

2008 ◽  
Vol 88 (6) ◽  
pp. 1117-1120 ◽  
Author(s):  
Carlos Eduardo Veiga de Carvalho ◽  
Ana Paula M. Di Beneditto ◽  
Cristina Maria M. Souza ◽  
Renata M.A. Ramos ◽  
Carlos Eduardo Rezende
Keyword(s):  
Rio De Janeiro ◽  
Marine Mammals ◽  
Cetacean Species ◽  
South Eastern ◽  
Eastern Brazil ◽  
The Difference ◽  
Contamination Levels ◽  
Positive Correlations ◽  
Pontoporia Blainvillei ◽  
Janeiro State

Mercury (Hg), cadmium (Cd) and zinc (Zn) concentration were analysed in muscular and liver tissues of two cetacean species, franciscana Pontoporia blainvillei and boto-cinza Sotalia guianensis, in order to compare their contamination levels in northern Rio de Janeiro State, south-eastern Brazil. The cutlassfish, Trichiurus lepturus, which is the preferential prey of the boto-cinza, have also been analysed. Liver tissue always presented higher concentrations when compared with muscle samples for all the studied metals. The boto-cinza showed higher concentrations for all metals in both tissues than in the franciscana, and the only exception was Cd. This result is probably related to the difference in size prey preference of each cetacean. Mercury was the only element that presented significant positive correlations with body length and age in both cetacean species. The cutlassfish showed rising Hg concentrations with weight and total length, suggesting a possible mercury pathway for marine mammals' contamination.

scholarly journals Isotopic niche of the catfishes Bagre bagre and Genidens barbus in a coastal area of south-eastern Brazil

2018 ◽  
Vol 18 (3) ◽  
Author(s):  
Ana Paula Madeira Di Beneditto ◽  
Maria Thereza Manhães Tavares ◽  
Leandro Rabello Monteiro
Keyword(s):  
Coastal Area ◽  
Rio De Janeiro ◽  
Niche Overlap ◽  
Isotopic Niche ◽  
Food Items ◽  
South Eastern ◽  
Eastern Brazil ◽  
Xiphopenaeus Kroyeri ◽  
The Mean ◽  
Janeiro State

Abstract: The isotopic niche of Bagre bagre and Genidens barbus target of commercial fisheries in a marine coastal area from northern Rio de Janeiro State (~21ºS), south-eastern Brazil was compared to evaluate the feeding assimilation and the trophic relationship. The mean isotopic values of the catfishes and their food items in the δ13C-δ15N space were coherent with their respective trophic positions. The relative contributions of the food items highlighted the shrimp Xiphopenaeus kroyeri as the most assimilated item in the diet of B. bagre, while for G. barbus the model highlighted the fish Porichthys porosissimus. The absence of niche overlap together with the trophic evenness point to a reduced feeding overlap between B. bagre and G. barbus in northern Rio de Janeiro State.

scholarly journals Rediscovery of the Grey-winged Cotinga Tijuca condita in south-eastern Brazil

1993 ◽  
Vol 3 (1) ◽  
pp. 1-12 ◽  
Author(s):  
D. A. Scott ◽  
M. De L. Brooke
Keyword(s):  
Rio De Janeiro ◽  
Cloud Forest ◽  
Type Locality ◽  
Single Specimen ◽  
South Eastern ◽  
Eastern Brazil ◽  
The Face ◽  
The Voice ◽  
Coastal Hill ◽  
Janeiro State

SummaryThe Grey-winged Cotinga Tijuca condita, previously known from a single specimen collected in 1942, was rediscovered near the type-locality in the coastal hill ranges of Rio de Janeiro state, south-eastern Brazil, in November 1980. Fieldwork at two sites in November/December 1980 and November 1981 revealed the presence of 10 individuals: one calling male and one female in cloud-forest at 1,320 m in the Serra do Tinguá; and six calling males, one female and one unsexed bird in cloud-forest at 1,830-2,000 m in the Serra dos Órgãos. Two females were netted, and two calling males were seen well in the field. The plumage of calling males resembled that of females, but was brighter with more grey on the face. The voice was described as an explosive sooee-wheee. The calling posture was similar to that of pihas Lipaugus, and there was no indication of any lekking behaviour. The species appears to have a very restricted distribution, but there is no indication that it is under threat at the present time.O cotingídeo Tijuca condita, previamente conhecido de um único indivíduo coletado em 1942, foi redescoberto próximo a sua localidade tipo nas montanhas da costa do estado do Rio de Janeiro, no sudeste do Brasil, em novembro de 1980. Observações no campo em duas localidades em novembro/dezembro 1980 e novembro 1981 revelaram a presença de 10 indivíduos: um macho cantando e uma fêmea em uma floresta de neblina a 1,320 m na Serra do Tinguá; seis machos, uma fêmea e um individuo de sexo não determinado em uma floresta de neblina a 1,830–2,000 m na Serra dos Órgãos. Duas fêmeas foram capturadas em rede e dois machos foram bem observados no campo. A plumagem dos machos assemelha-se a das fêmeas, contudo mais brilhante e acinzentado na face. O canto foi descrito como um explosivo sooee-wheee. A postura de canto foi semelhante à de outros cotingídeos Lipaugus e não há indícios de comportamento de leque. A espécie parece ter uma distribuição muito restrita, mas não ha indícios de que essa espécie esteja ameaçada no momento.

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