História natural de Tropidurus oreadicus em uma área de cerrado rupestre do Brasil Central

Abstract

Ecological aspects and of the reproductive biology of Tropidurus oreadicus was investigated in a rocky cerrado area in Central Brazil. It was studied the morphometry, the microhabitat use, the activity pattern, the diet and the characteristics of the reproductive biology of T. oreadicus in Cocalzinho-GO, from April to September/2003. They are sexually dimorphic animals, with adult males larger than females. The preferential microhabitat used by the species was the surface of the rocks (saxicolous habit). The species shows a unimodal activity pattern. It was frequently observed resting and exposed to the sun between 9:00 and 10:59 hours. This T. oreadicus population feed upon ants, larvae of insects and beetles. Besides it presented ontogenetics shift and intersexual differences in the diet. Probably these differences were associated with the differentiated allocation of the resources for the growth or production of gamete. The reproduction is probably seasonal occurring mainly during the months of higher rainfall.Keywords Aspectos ecológicos e da biologia reprodutiva de Tropidurus oreadicus foram investigados em uma área de cerrado rupestre do Brasil Central. Foram estudados a morfometria, o uso do microhábitat, o padrão de atividade, a dieta e características da biologia reprodutiva de T. oreadicus em Cocalzinho -GO, de abril a setembro/2003. São animais sexualmente dimórficos, com os machos adultos maiores que as fêmeas. O microhábitat preferencial utilizado pela espécie foi a superfície das rochas (hábito saxícola). A espécie mostrou padrão de atividade unimodal. Foram frequentemente observados parados e expostos ao sol entre 9:00 e 10:59 horas. A alimentação desta população de T. oreadicus é baseada em formigas, larvas de inseto e besouros. Além disso, apresentaram mudanças ontogenéticas e diferenças intersexuais na dieta. Provavelmente essas diferenças estejam associadas à alocação diferenciada dos recursos para o crescimento ou produção dos gametas. A reprodução é provavelmente sazonal ocorrendo principalmente nos meses de maior pluviosidade.Palavras-chave: nicho, dieta, atividade, ecologia, Tropidurus.

Trophic ecology and foraging behavior of Tropidurus hispidus and Tropidurus semitaeniatus (Squamata, Tropiduridae) in a caatinga area of northeastern Brazil

“…This diet composition is similar to that of other Tropidurids (colli et al, 1992;Van sluys, 1993;teixeiRa & gioVanelli, 1999;fialHo et al, 2000;faRia & aRaújo, 2004;meiRa et al, 2007). Nevertheless, seasonal variations in diet are expected in species that live in habitats in which local productivity is subject to humidity (janZen & scHoeneR, 1968;ballingeR & ballingeR, 1979) and rainfall cycles (RocHa, 1994;Van sluys, 1995) like the Caatingas (ab'sábeR, 1974).…”

Germinative cells and spermatogenesis of the lizard Tropidurus torquatus (Tropiduridae) from a urban area in the cerrado biome of the brazilian midwest

“…However, the relationship between the types of germinative cells and the size of seminiferous tubules showed differences of spermatogenic activity, with all types of germinative cells present, but with regression during February to April (FERREIRA et al, 2009). For T. oreadicus from the Cerrado Biome, spermatogenesis was more intense during the months of June to September, during the dry season (MEIRA et al, 2007;FERREIRA et al, 2011). Another species of the Cerrado, T. montanus, presented reproductive males throughout the year, but in greater proportion from September to January ( VAN SLUYS et al, 2002).…”

Molecular Identification of Food Sources in Triatomines in the Brazilian Northeast: Roles of Goats and Rodents in Chagas Disease Epidemiology

“…The determination of Tropidurus oreadicus, a lizard from central region of Brazil, is probably feeding on Tropidurus semitaeniatus, which is widely distributed in the study region, 18 without cytb sequences in the GeneBank though. Some authors 16,19,20 had already evidenced this triatomine behavior, stating that the presence of lizards may help to keep infestations, especially in the absence of warmblooded animals.…”