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| Registros recuperados: 1.132 | |
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| Almeida,Paulo R. C.; Monteiro-Neto,Cassiano; Tubino,Rafael A.; Costa,Marcus R.. |
| RESUMO Os otólitos são estruturas espécie-específicas de peixes cuja análise morfológica é uma ferramenta eficiente para identificação e discriminação de estoques e/ou populações sujeitas a variações clinais. O presente trabalho buscou elucidar o grau de variação morfológica dos otólitos sagitta do dourado, Coryphaena hippurus Linnaeus, 1758 capturado ao largo da costa sudeste do Brasil pela frota pesqueira sediada no Rio de Janeiro. Os 164 pares de otólitos analisados foram obtidos a partir de amostras coletadas entre fevereiro de 2014 e outubro de 2016. A forma e o contorno dos otólitos sagitta foram caracterizados através de seis descritores (área, perímetro, circularidade, retangularidade, excentricidade e dimensão fractal) e análises de Fourier... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Morfometria geométrica; Forma do otólito; Análise de Fourier elíptica; Análise multivariada. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212020000100218 |
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| Guimarães,Lorena dall'Ara; Bastos,Rogério P.. |
| The vocalizations of H. raniceps (Cope, 1826) and their functions are described, including an analysis of the influence of temperature, weight, or SVL (snout-vent length) of males on the acoustic parameters. The vocalizations were recorded in three areas in Fazenda Lagoa Grande, Municipality of Pontalina, State of Goiás, central Brazil. Males began their vocalizations just before sunset, extending them, in some cases, to dawn of the following day. The peak of activities happened between 21h and 23h. The height of calling sites varied plenty, being the position horizontal in about 50% of them. Males defended sites in different areas during consecutive nights. Rain and strong winds interrupted the calling activities. Males emitted three vocalizations:... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anura; Hylidae; Hyla; Vocalization; Acoustic parameters. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212003000200005 |
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| Garcia,Paulo C. A.; Haddad,Célio F. B.. |
| The vocalizations of Hypsiboas ericae (Caramaschi & Cruz, 2000) are described and new information on the external morphology and osteology of the species are presented. H. ericae presents a bony spine in the prepolex and the individuals can present green or brown dorsal color, as other species of the Hypsiboas pulchellus (Duméril & Bibron, 1841) species group. The vocalizations of H. ericae are similar to the vocalizations of Hypsiboas bischoffi (Boulenger, 1887), Hypsiboas guentheri (Boulenger, 1886), and other species in the H. polytaenius (Cope, 1870 "1869") clade of the H. pulchellus species group, but some osteological aspects are different to those found in the majority of the species of this group. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hypsiboas ericae; Vocalizations; Osteology; Hypsiboas pulchellus group. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212008000100021 |
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| Moreno,Aline B.; Lagos,Adriano R.; Alves,Maria Alice S.. |
| This study aimed to evaluate the water depth selection during foraging, the efficiency in prey capture, and the food items captured by Casmerodius albus (Linnaeus, 1758) and Egretta thula (Molina, 1782). The work was conducted at an urban lagoon, Lagoa Rodrigo de Freitas, Rio de Janeiro. Four transects were made each month (two in the morning and two in the afternoon) for six months. When the birds were detected foraging, the water depth and the types of prey captured were recorded. There was no significant relationship between the foraging efficiencies of the two species. However, they differed in relation to the water depth when foraging, and also in the food items captured. Casmerodius albus captured mainly fishes while Egretta thula captured mainly... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Foraging depth; Casmerodius albus; Egretta thula; Lagoa Rodrigo de Freitas. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212005000100016 |
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| Araújo,Marina S.L.C.; Castiglioni,Daniela S.; Coelho,Petrônio A.. |
| The present contribution aims at evaluating the carapace width vs. humid weight relationship and the condition factor of Ucides cordatus (Linnaeus, 1763), in the mangrove forests of the Ariquindá and Mamucabas rivers, state of Pernambuco, Brazil. These two close areas present similar characteristics of vegetation and substrate, but exhibit different degrees of environmental conservation: the Ariquindá River is the preserved area, considered one of the last non-polluted of Pernambuco, while the Mamucabas River suffers impacts from damming, deforestation and deposition of waste. A total of 1,298 individuals of U. cordatus were collected. Males were larger and heavier than females, what is commonly observed in Brachyura. Ucides cordatus showed allometric... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allometric constant; Carapace width; Caranguejo-uçá; Growth; Humid weight. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212012000300005 |
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| Steiner,Andrea Quirino; Amaral,Fernanda Maria Duarte; Amaral,João Renato de Barros Campos do; Sassi,Roberto; Barradas,Juliana Imenis. |
| RESUMO A zonação dos ambientes recifais permite avaliar possíveis impactos antropogênicos e subsidiar futuros planos de manejo. Este estudo teve por objetivo levantar as espécies bentônicas (com ênfase nos cnidários) no topo dos recifes emersos da Área de Proteção Ambiental (APA) Costa dos Corais, bem como calcular e comparar sua porcentagem de cobertura. Foram realizados transectos em linha contínuos, em seis praias da referida APA, em três regiões da plataforma recifal e com quatro réplicas para cada região. Os resultados mostraram maior cobertura de algas em todas as praias, com exceção de Tamandaré/PE. Entre os cnidários os zoantídeos predominaram, mas se registrou, também, a ocorrência dos corais escleractíneos Siderastrea stellata e Favia gravida.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Corais; Transectos; Ambientes recifais. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212015000200184 |
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| Morais Júnior,Cláudio S. de; Diniz,Leidiane P.; Nascimento Filho,Silvano L. do; Brito,Maiara T. da Silva; Silva,Adilson de O.; Moura,Geraldo J. B. de; Melo Júnior,Mauro de. |
| ABSTRACT Assumptions about the distribution of zooplankton communities in various ecosystems are often limited by lack of data on dispersal mechanisms. Many studies on frog-mediated passive dispersal have been developed in bromeliads, but they usually focus on ostracods and annelids. We investigated the potential for external phoresy of zooplankton (rotifers, cladocerans, copepods) by treefrogs in bromeliad phytotelms. Our hypotheses are that (1) zooplankton composition on frogs’ skin and in phytotelm tanks is similar, and (2) frogs with larger body size carry more propagules of these invertebrates. We filtered phytotelm water (10 to 150 mL) using plankton net (45 µm), and fixed invertebrates with 4% formalin. Frogs were actively collected in and around... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Frog skin; Atlantic forest; Bromeliad; Dispersal; Epizoochory. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212019000100220 |
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| Registros recuperados: 1.132 | |
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