Navegando por Assunto "Neotropical region"

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Acesso aberto (Open Access)
Abundância, composição e diversidade de Arctiinae (Lepidoptera, Arctiidae) em um fragmento de floresta na Amazônia Oriental em Altamira, PA, Brasil
(Instituto Nacional de Pesquisas da Amazônia, 2012-03) TESTON, José Augusto; NOVAES, Jessé Bucioli; ALMEIDA JÚNIOR, José Otávio Barros
This study evaluated the Arctiinae fauna in a fragment of primary forest in Altamira, Pará, Eastern Amazonia, Brazil. The moths were sampled during two years (from August 2007 to July 2009) with a light trap. The following parameters were measured: richness, abundance, constancy, diversity and evenness indices (Shannon H ‘and E') and Brillouin (H and E), and dominance index of Berger-Parker (BP). The richness estimatives were made by nonparametric procedures, Bootstrap, Chao 1, Chao 2, Jackknife 1, Jackknife2 and Michaelis-Mentem. Four hundred and sixty-six individuals of 78 species of Arctiinae were captured, of which twelve are new records for Pará State. Values of parameters analyzed for the entire period were: H ‘= 3.08, E' = 0.708, H = 2.86, E = 0.705, and Sp = 0.294. Communities of the less rainy months were more diverse. Estimators predicted an increase between 17 to 253 in species richness.
Acesso aberto (Open Access)
Diversidade de Arctiinae (Lepidoptera, Arctiidae) em área alterada em Altamira, Amazônia Oriental, Pará, Brasil
(Instituto Nacional de Pesquisas da Amazônia, 2010) TESTON, José Augusto; DELFINA, Márcia Cristina
This work evaluates the Arctiinae fauna in Altamira, Pará, in an area with strong human pressure, using light-traps during two nights at each stage of the new moon each month, from December 2007 to November 2008. The evaluation parameters were: richness, abundance, constancy, diversity index and evenness (Shannon H ‘and E’) and Brillouin (H and E), dominance of Berger-Parker (BP). The richness estimatives were made by means of non-parametric procedures, Bootstrap, Chao 1, Chao 2, Jackknife 1, Jackknife 2 and Michaelis-Mentem. We captured 420 specimens belonging to 64 species of Arctiinae, and 19 species recorded for the first time in the state of Pará. The values of the parameters analyzed for the total period were: H ‘= 4.69; E’ = 0.781; H = 4.37; E = 0.732 and BP = 0.183. During the less rainy season (June-November) we found the most significant values for all parameters. In the rain season (December to May) we found the most significant percentage of similarity. Richness estimators predicted the gathering of more than 18.7% to 60.9% of species.