The effects of seasonality on the foraging behavior of Tropidurus hispidus and Tropidurus semitaeniatus (Squamata: Tropiduridae) living in sympatry in the Caatinga of northeastern Brazil

Kolodiuk, Miguel Fernandes; Ribeiro, Leonardo Barros; Freire, Eliza María Xavier

doi:10.1590/s1984-46702009000300026

Cited by 11 publications

(5 citation statements)

References 24 publications

(21 reference statements)

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“…Probably the plasticity of the species is enough to change the hunting strategy according food supply, which varies throughout the year, as observed for two tropidurid lizards in Brazilian caatinga (Kolodiuk et al 2009). As shown in Fig.…”

Section: Diet Compositionmentioning

confidence: 97%

“…The Tropidurus of the torquatus group from South America (sensu Frost et al 2001) comprises mainly heliophilous species, living in open areas such as semi-arid caatingas (shr ublands), cerrados (savannas), chacos (lowlands), restingas (coastal sand dune habitats), savanna enclaves, clearings within mesic lowland forest, and rock outcrop formations (Rodrigues 1987, Vitt 1993, Vitt et al 1996, Kolodiuk et al 2009). Tropidurus torquatus (Wied 1820) is a common species which has a wide distribution in Brazil (Rodrigues 1987, Frost et al 2001.…”

Section: Introductionmentioning

confidence: 99%

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Feeding and reproduction ecology of the lizard Tropidurus torquatus (Squamata: Tropiduridae) in a rock outcrop area in southeastern Brazil

Gomides

Ribeiro

Peters

et al. 2013

Rev. chil. hist. nat.

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Feeding and reproduction ecology of the lizard Tropidurus torquatus (Squamata: Tropiduridae) in a rock outcrop area in southeastern Brazil ABSTRACTThis work evaluates the diet and the reproductive cycle of Tropidurus torquatus in relation to seasonality in a rock outcrop formations in a remaining area of Atlantic Rainforest. The data indicate that the lizards feed mainly on arthropods and plant material. The female reproductive activity varies between seasons, while males contain spermatozoids throughout the year. The minimum body size at maturity of the individuals was larger when compared to other population of the same species studied by other authors. The data obtained in the present study confi rm previous observations about the different patterns in diet composition and reproductive cycles of each population of this species in different latitude and occurrence areas, and provide the fi rst study about this theme for T. torquatus in rock outcrops in Atlantic Forest of Minas Gerais state.Key words: diet, follicular cycle, reproductive ecology, seasonal changes, testicular cycle. RESUMENEn este estudio se evalúa la dieta y el ciclo reproductivo de Tropidurus torquatus en relación con la estacionalidad en en un afl oramiento rocoso de la Mata Atlántica. Los datos recogidos indican que los lagartos se alimentan principalmente de artrópodos y materia vegetal. La actividad reproductiva de las hembras varía entre temporadas, mientras que los machos contenía esperma durante todo el año. El tamaño mínimo de ejemplares reproductivamente activos fue mayor en comparación a la encontrada por otros autores para esta especie en otras localidades. Los datos obtenidos en este estudio confi rman observaciones previas sobre los diferentes patrones en composición de dieta y ciclos reproductivos de cada población de esta especie en diferentes latitudes y áreas de ocurrencia, y proporcionan el primer estudio sobre este tema para T. torquatus en un afl oramiento rocoso de la Mata Atlántica del estado de Minas Gerais.Palabras clave: cambios estacionales, ciclo folicular, ciclo de los testículos, dieta, ecología reproductiva.

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Section: Diet Compositionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Feeding and reproduction ecology of the lizard Tropidurus torquatus (Squamata: Tropiduridae) in a rock outcrop area in southeastern Brazil

Gomides

Ribeiro

Peters

et al. 2013

Rev. chil. hist. nat.

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“…The larger total and home range size of T. torquatus during the non-reproductive season, compared to those in the reproductive season, apparently results from the lizards' activity being concentrated in larger areas, including the rock outcrop-soil interface, to find food during periods of drought (Kolodiuk et al 2009). Nevertheless, the male and female range sizes of T. torquatus found in the present study in general agree with those described for this species (Giaretta 1996), where males used larger areas than females did, and for other lizards of this genus (Van Sluys 1997) and trophic level (Rocha 1999).…”

Section: Gender and Seasonmentioning

confidence: 99%

Range structure, microhabitat use, and activity patterns of the saxicolous lizard Tropidurus torquatus (Tropiduridae) on a rock outcrop in Minas Gerais, Brazil

Ribeiro

Sousa

Gomides

2009

Rev. chil. hist. nat.

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Although Tropidurus is a widely distributed lizard genus in South America and the Galapagos Islands, studies on space use and spatial distribution are scarce. We studied the home range structure of the saxicolous lizard Tropidurus torquatus based on the inland population of a rock outcrop in Minas Gerais State, southeastern Brazil. Lizards were individually marked and observed during reproductive and non-reproductive seasons. Using the minimum convex polygon method, we found that average total range size of males during the reproductive season was larger than that of females, and that both had similar total range sizes in the nonreproductive season. The harmonic mean method showed that males have a larger home range size than that of females during both seasons. As expected for a polygynous species, the average number of males whose total ranges overlapped those of females tended to be higher in the reproductive season than in the nonreproductive season. Intrasexually, the number of females whose total ranges were associated with those of other females was also higher in the reproductive season than in the non-reproductive season. For males, this number remained low in both seasons, suggesting that males use more exclusive areas, whereas the smaller total ranges of females apparently sustain a higher density of individuals during the reproductive season. Frequency of microhabitat use in relation to vegetation increased in the non-reproductive season and the activity patterns of lizards shifted from bimodal in the reproductive season (rainy period) to unimodal in the non-reproductive season (dry period). Thus, the range structure, microhabitat use, and activity patterns of the T. torquatus observed here were all influenced by the time frame affecting their spatial ecology.

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“…In this work, we evaluate how helminth parasitism in the generalist lizard Tropidurus hispidus Spix, 1825 is affected by agricultural land use. Tropidurus hispidus (Tropiduridae) feeds predominantly on insects (Ribeiro & Freire 2011) and has sit-and-wait behavior as its main foraging strategy (Kolodiuk et al 2009). These lizards can be found both in natural environments and in anthropic areas (they even seem to benefit from urbanization, Andrade et al 2019), being good models to test the effect of agricultural land use on parasite communities.…”

Section: Introductionmentioning

confidence: 99%

How agricultural land use affects the abundance and prevalence of monoxenous and heteroxenous helminths in the generalist lizardTropidurus hispidus

Brasileiro

Carvalho

2023

J. Helminthol.

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Among the forms of anthropogenic disturbance, agricultural land use is one of the main threats to biodiversity. Understanding how interactions between parasites and hosts are affected by agricultural land use allows predictions of how these anthropogenic impacts affect parasites. Although parasitism patterns are affected by agricultural land use, it is noteworthy that different groups of parasites can respond differently to these environmental alterations. While heteroxenous species need more than one host to complete their life cycle and tend to be more harmed by anthropization, monoxenous species, which need only one host to complete their life cycle, tend to be less harmed. In this work, we evaluate how agricultural land use affects the abundance and prevalence of parasitism for monoxenous and heteroxenous helminths in the generalist lizard Tropidurus hispidus in Caatinga Domain, Brazil. We recorded differences in abundance and prevalence of heteroxeneous (higher in conserved areas) and monoxenous helminths (higher in agricultural areas). Heteroxenous helminths that have lizards as definitive hosts are mainly obtained through diet. Tropidurus hispidus predominantly consumes insects, so it is possible that the lower abundance and prevalence of heteroxenous parasites in agricultural areas, beyond habitat simplification, is related to the decrease in the insect population. As monoxenous species do not need an intermediate host, it is possible that this aspect has influenced their greater success in anthropogenic environments than heteroxenous species. This contrasting result reinforces the need for a separate assessment between these groups when evaluating effects of land use.

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The effects of seasonality on the foraging behavior of Tropidurus hispidus and Tropidurus semitaeniatus (Squamata: Tropiduridae) living in sympatry in the Caatinga of northeastern Brazil

Cited by 11 publications

References 24 publications

Feeding and reproduction ecology of the lizard Tropidurus torquatus (Squamata: Tropiduridae) in a rock outcrop area in southeastern Brazil

Feeding and reproduction ecology of the lizard Tropidurus torquatus (Squamata: Tropiduridae) in a rock outcrop area in southeastern Brazil

Range structure, microhabitat use, and activity patterns of the saxicolous lizard Tropidurus torquatus (Tropiduridae) on a rock outcrop in Minas Gerais, Brazil

How agricultural land use affects the abundance and prevalence of monoxenous and heteroxenous helminths in the generalist lizardTropidurus hispidus

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