Hábitos alimentares de Enyalius perditus (Squamata, Leiosauridae) no Parque Estadual do Ibitipoca, Minas Gerais, Brasil

Abstract

ABSTRACT. Feeding habits of Enyalius perditus (Squamata, Leiosauridae) from the Parque Estadual do Ibitipoca, Minas Gerais, Brazil. The present study was carried out to describe the diet, and its variations according to food availability, in Enyalius perditus Jackson, 1978 from Parque Estadual do Ibitipoca, State of Minas Gerais, Brazil. Three areas were chosen in the forest fragments; pit falls and glue traps were used to capture lizards and their preys. Lizards (n=55) were dissected in order to analyze the stomach content. The Electivity Index showed that insect larvae were volumetrically important in the diet of E. perditus, while ants and woodlices where numerically important. The quantity of diet items have differed significantly between males and females, perhaps, as a consequence of the higher quantity of ants ingested by female lizards and larvae ingested by males lizards. Based upon alimentary behavior, the male lizards resemble the active forragers and the females sit and wait forragers. KEYWORDS.Leiosauridae, Enyalius perditus, ecology, behavior, diet. RESUMO.No presente estudo foi analisado a dieta de Enyalius perditus Jackson, 1978 e suas variações de acordo com disponibilidade de alimento no Parque Estadual do Ibitipoca, Minas Gerais, Brasil. Três áreas de matas foram amostradas, utilizando-se armadilhas de queda e adesivas para captura dos lagartos e itens-presa disponíveis. Os lagartos (n= 55) foram dissecados e o conteúdo estomacal analisado. O Índice de eletividade mostrou que larvas foram importantes volumetricamente na dieta de E. perditus, enquanto que formigas e isópodos foram importantes numericamente. A quantidade de itens nas dietas de machos e fêmeas diferiram estatisticamente, talvez como uma conseqüência da maior quantidade de formigas ingeridas pelas fêmeas e isópodos e larvas pelos machos. Baseado no comportamento alimentar, os machos são mais semelhantes aos forrageadores ativos e as fêmeas, aos predadores senta-e-espera.

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

“…Diets are therefore an important and dynamic component of the interaction of a lizard with its environment and with other co-existing species (duffield & bull, 1998). Lizard species may differ in their diets as competition-reducing mechanisms (dunHam, 1983;, as a result of morphological differences (colli et al, 1992; mesquita et al, 2006), as well as related to different availability of food types (stamPs et al, 1981;duRtscHe, 1995;sousa & cRuZ, 2008). An additional source of variation in diet may result from different foraging behaviors, especially among phylogenetically related species (magnusson et al, 1985; duffield & bull, 1998).…”

The nematode community in the Atlantic rainforest lizard Enyalius perditus Jackson, from south-eastern Brazil

“…The genus Enyalius Wied, 1821 is comprised of nine species (Sociedade Brasileira de Herpetologia, 2010) of diurnal, insectivorous lizards (Sousa & Cruz, 2008;Barreto-Lima, 2009) well distributed throughout different biomes in Brazil, such as the Atlantic rainforest (Etheridge, 1969;Vanzolini, 1972Vanzolini, , 1974Jackson, 1978), Amazon (Á vila-Pires, 1995;Vitt et al, 1996), Caatinga (semi-arid brush) and Cerrado (savanna-like vegetation) (Bertolotto et al, 2002;Rodrigues et al, 2006). Despite the wide distribution of Enyalius, few studies have addressed its helminth fauna and parasite ecology (Vicente et al, 1993;Durette-Desset et al, 2006;Sousa et al, 2007;Vrcibradic et al, 2007Vrcibradic et al, , 2008.…”

Natural history of the lizard Enyalius iheringii (Squamata, Leiosauridae) in southern Brazilian Atlantic forest

“…For E. perditus the length ranged from 1.25 to 32.3 mm (SOUSA & CRUZ, 2008). It was found no significant relationship between the prey volume and the lizard size for E. iheringii, as well as for others species of the genus Enyalius (ZAMPROGNO et al, 2001; VAN SLUYS et al, 2004;TEIXEIRA et al, 2005).…”

“…Biological information about species of the genus Enyalius exists for E. iheringii (JACKSON, 1978;SAZIMA & HADDAD, 1992;LEMA, 1994LEMA, , 2002MARQUES & SAZIMA, 2004), E. catenatus (Wied, 1821) (VANZOLINI, 1972), E. leechii (Boulenger, 1885) (VITT et al, 1996;), E. bilineatus Duméril & Bibron, 1837(VANZOLINI, 1972JACKSON, 1978;ZAMPROGNO et al, 2001), E. perditus Jackson, 1978(SOUSA et al, 2000LIMA & SOUSA, 2006;SOUSA & CRUZ, 2008) and E. brasiliensis (Lesson, 1828) (JACKSON, 1978;LEMA, 1994LEMA, , 2002VAN SLUYS et al, 2004). Studies focusing on systematics and geographic distribution of Enyalius are those of ETHERIDGE (1969), JACKSON (1978) and RODRIGUES et al (2006).…”