Navegando por Assunto "Ecomorfologia"

Agora exibindo 1 - 5 de 5

Acesso aberto (Open Access)
Análise evolutiva da morfologia e ecologia em espécies continentais de lagartos do gênero Anolis daudin 1804 (Squamata : Polychrotidae)
(Universidade Federal do Pará, 2007-10-02) PINTO, Gabriel Silva; ÁVILA-PIRES, Teresa Cristina Sauer de; http://lattes.cnpq.br/1339618330655263
Acesso aberto (Open Access)
Distribuição e ecomorfologia de Neritina zebra (Bruguiere, 1792) (Mollusca: Gastropoda: Neritidae), em um estuário amazônico, Pará, Brasil
(Universidade Federal do Pará, 2012-05-25) CUNHA, Cristiane Vieira da; SANTOS, Franklin Noel dos; http://lattes.cnpq.br/2437036625902034; LEE, James Tony; http://lattes.cnpq.br/1693070833836566
The present study evaluates the vertical distribution of Neritina zebra in rocky outcrops in the lower and middle intertidal, intertidal as well as the horizontal distribution between rocky and clay substratas of an estuary in the Brazilian Amazon. The sampling areas are located in an oligohaline area in Icoaraci, Mosqueiro and Colares, at the coast of the State of Pará, Brasil. To evaluate the vertical distribution on orocky substrata, substratamolluscs were esampled in the lower and middle intertidal. intertidal In the lower mesolittoralmto, where clay and rocky substrata occur, substrataoccursamples were collected to verify the effect of the substrata on othe distribution of the mollusc.For each substrata and intertidal zonet zone, 22 replicates were randomly sampledusing a quadrant of 25x25cm² during the rainyrainy and dry season. An Analysis of Variance was seasonAAVancewasperformed to test (1) the effect of the intertidal zone and (2) the substrata onsubstratao the density of N. zebra. Analysis Athe vertical distribution results showed that in the lower zone, ,juvenile individuals show a higher density than in the middle zone, and an oppositeand anp pattern compared with adults appear to occur.Regarding the distribution on the different substrata,on the differentsubstrata results showed higher densities ono rocky substrate than onon clay substrata for young individuals, whereas no definite pattern was detected for adultss. This variability between the substrata and intertidal zones showed the influence of the seasons and the sampling sites. Icoaraci showed theshowedlowest densities, which can be associated to the anthropic activities in that area.
Acesso aberto (Open Access)
Ecomorfologia de três espécies de Dipsas Laurenti, 1768 e Sibynomorphus Fitzinger, 1843 (Dipsadidae: Dipsadinae)
(Universidade Federal do Pará, 2013) SANTOS, Marina Meireles dos; MARTINS, Marlúcia Bonifácio; http://lattes.cnpq.br/8882047165338427; PRUDENTE, Ana Lúcia da Costa; http://lattes.cnpq.br/1008924786363328
Ecological factors such as the use of the environment and feeding habits may influence the body and cephalic morphology of an organism, however, this can also reflect the phylogenetic lineage. The subfamily Dipsadinae includes South American snakes formed by two clades, one including Geophis and Atractus and another including Dipsas, Ninia, Sibon and Sibynomorphus, which are the tribe Dipsadini. The snakes of this tribe show a high degree of modification in their body and cephalic morphology wich is related to the environment and malacophagous feeding habits. The species of Dipsas and Sibon have specializations related to the use of arboreal environment, offering a better performance in locomotion in the vegetation, while the Sibynomorphus species are mostly adapted to terrestrial environment. Regarding their feeding habits they posses, in varying degrees, a number of changes related to cranial modification and to manipulation and ingestion of gastropods such as slugs and snails. Whereas there is a direct relationship between the shape of the head and the diet, this study aims to analyze the divergences of cephalic morphology between species of diet related to Dipsas and Sibynomorphus, as well as analyze possible convergences between species of these genera and Tomodon dorsatus, species of the tribe Tachymenini, recognized as specialized in slugs. This study is structured in two parts: the first refers to the general introduction, where a broad approach on the morphological adaptations related to feeding habits of Dipsadini, as well as the advantages of the use of geometric morphometry technique in morphological studies; and the second part refers to the work itself, titled "Ecomorphology of three species of Dipsas Laurenti, 1768 and Sibynomorphus Fitzinger, 1843 (Dipsadidae: Dipsadinae)".
Acesso aberto (Open Access)
Ecomorphological patterns of the fishes inhabiting the tide pools of the Amazonian Coastal Zone, Brazil
(2013) SOARES, Bruno Eleres; RUFFEIL, Tiago Octavio Begot; MONTAG, Luciano Fogaça de Assis
The present study was based on the identification of the ecomorphological patterns that characterize the fish species found in tide pools in the Amazonian Coastal Zone (ACZ) in the Pará State, Brazil. Representatives of 19 species were collected during two field campaigns in 2011. The dominance, residence status, and trophic guild of each species were established, and morphometric data were obtained for up to 10 specimens of each species. A total of 23 ecomorphological attributes related to locomotion, position in the water column, and foraging behavior were calculated for the analysis of ecomorphological distance. Principal Component Analysis (PCA) was utilized for the evaluation of ecomorphological attributes that explained the variation among species. Mantel Test was used to correlate the taxonomic distance with species' morphological patterns and a partial Mantel Test to analyze the correlation among trophic guilds and ecomorphological patterns, controlling the effects of taxonomic distance among species. The analyses revealed two principal axes of the variation related to locomotion, correlated with the width of the caudal peduncle and the shape of the anal fin, as well as the influence of taxonomic distance on the ecomorphological characteristics of the different species. The dominant and resident species both presented a reduced capacity for continuous swimming. The two principal axes identified in relation to the position of the fish in the water column were correlated with the position of the eyes, the area of the pelvic fin, and body shape, with evidence of the influence of taxonomic distance on the morphology of the species. PCA grouped species with pelagic habits with benthonic ones. In the case of foraging behavior, the two principal axes formed by the analysis correlated with the size of the mouth, eye size, and the length of the digestive tract. Species of different guilds were grouped together, indicating a weak relationship between morphology and foraging behavior, and no relationship was found with taxonomic distance. The resident and dominant species in the tide pools of the ACZ present sedentary habits, with little evidence of the influence of taxonomic distance on the use of habitats or morphology, which was a poor indicator of foraging strategies, and showing that phylogenetically distant species could present similar ecomorphological patterns.
Acesso aberto (Open Access)
Padrão de distribuição de Odonata (Insecta) em sistemas aquáticos com exploração de madeira na Amazônia Oriental: seleção de microhabitat e características morfológicas das libélulas
(Universidade Federal do Pará, 2017-01-06) CALVÃO , Lenize Batista; JUEN, Leandro; http://lattes.cnpq.br/1369357248133029; LOPES, Maria Aparecida; http://lattes.cnpq.br/3377799793942627