Reproduction, Body Size, and Diet of Polychrus acutirostris (Squamata: Polychrotidae) in Two Contrasting Environments in Brazil

Garda, Adrian Antonio; Costa, Gabriel C.; França, Frederico Gustavo Rodrigues; Giugliano, Lilian G.; Leite, Giselle S.; Mesquita, Daniel Oliveira; Nogueira, Cristiano de Campos; Tavares-Bastos, L.; Vasconcellos, Mariana M.; Vieira, Gustavo H. C.; Vitt, Laurie J.; Werneck, Fernanda P.; Wiederhecker, Helga C.; Colli, Guarino R.

doi:10.1670/10-288

Cited by 31 publications

(20 citation statements)

References 40 publications

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“…These characteristics place the species in the small-bodied, early-maturing, small-clutched, and multiple-brooded category of lizard life histories (Tinkle et al, 1970;Dunham et al, 1988). Sympatric species of Cerrado lizards exhibit a variety of reproductive tactics, with most reproducing primarily during the rainy season, including Ameiva ameiva (Linnaeus 1758) (Colli, 1991), Mabuya frenata (Cope 1862) (Vrcibradic and Rocha, 1998), Polychrus acutirostris Spix 1825 (Garda et al, 2012), Tropidurus itambere Rodrigues 1987(Van Sluys, 1993, and T. torquatus (Wied-Neuwied 1820) (Wiederhecker et al, 2002), whereas others breed in the dry season, such as Cnemidophorus ocellifer (Spix 1825) (Mesquita and Colli, 2003) and Gymnodactylus amarali Barbour 1925. This variation likely results from the interaction between phylogenetic conservatism and fluctuating environmental conditions (e.g., water and temperature) and resources (e.g., food availability) (Colli et al, 1997).…”

Section: Parametermentioning

confidence: 99%

Fire Regimes and the Demography of the LizardMicrablepharus atticolus(Squamata, Gymnophthalmidae) in a Biodiversity Hotspot

Sousa

Soares

Costa

et al. 2015

South American Journal of Herpetology

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Disturbance caused by anthropogenic fires are increasingly affecting the biodiversity of fire-prone ecosystems worldwide. The Cerrado biodiversity hotspot suffers higher deforestation rates than Amazonia and concentrates most of the burned areas in South America. To support adequate fire-management decisions in Cerrado, knowledge on the effects of altered fire regimes upon its animal populations is necessary. Based on a long-term, large-scale fire experiment, we investigated the effects of different fire regimes on the demography of the gymnophthalmid Micrablepharus atticolus, an endemic lizard of the Cerrado. Because M. atticolus is more abundant in open habitats, we predicted that frequent burns should favor its populations. Over eight years, we conducted a mark-recapture study using pitfall trap arrays in five 10 ha plots of cerrado sensu stricto, subjected to prescribed burns. Using generalized linear mixed-models of time series data and an information theoretic approach to select demographic models, we describe the life history of M. atticolus and assess the response of apparent survival, detectability, and recruitment to burn regimes and climate variation. Micrablepharus atticolus has an annual life cycle, with complete annual population turnover; breeding takes place during the dry season, when activity is higher, and hatchlings appear in the wet season. Apparent survival, detectability, and recruitment increased in the short-run after the passage of fire in all experimental plots. In the long run, however, both fire-suppression and more severe fire regimes were seemingly detrimental, presumably by affecting microclimatic conditions and food availability. Short-term studies may not adequately describe the effects of fire on the demography of lizard populations. Adequate fire management is warranted for biodiversity conservation in Cerrado, both inside and outside protected areas, including a reduction in the frequency and severity of burns in open physiognomies and controlled, patch mosaic fires to prevent excessive fuel accumulation in denser physiognomies. Fire Regimes and the Demography of the Lizard Micrablepharus atticolus (Squamata, Gymnophthalmidae) in a . 2012. Adaptive responses and disruptive effects: how major wildfire influences kinship-based social interactions in a forest marsupial. Molecular Ecology 21:673-684. : Multi-model inference. Available from: http://CRAN.R-project.org/package=MuMIn. Bates D., Maechler M., Bolker B., Walker S. 2014. lme4: Linear mixed-effects models using Eigen and S4. Available from: http:// CRAN.R-project.org/package=lme4.

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Section: Parametermentioning

confidence: 99%

Fire Regimes and the Demography of the LizardMicrablepharus atticolus(Squamata, Gymnophthalmidae) in a Biodiversity Hotspot

Sousa

Soares

Costa

et al. 2015

South American Journal of Herpetology

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“…The lizard Polychrus acutirostris Spix, 1825 (Squamata, Polychrotidae) is widely distributed throughout the Caatinga and Cerrado (Garda et al., ), and represents a good model organism to test diversification hypotheses for this region. In this study, we use mitochondrial and nuclear datasets to characterize the genetic diversity of P. acutirostris and specifically test three hypotheses: (1) Major divergence events within P. acutirostris took place during the Neogene; (2) The geomorphological compartmentalization of the Cerrado landscape increased landscape heterogeneity favouring intraspecific structure between ancient plateaus and younger valleys; and (3) The environmental gradient between Caatinga and Cerrado produced a genetic break within P. acutirostris , due to contrasting environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

Diversification with gene flow and niche divergence in a lizard species along the South American “diagonal of open formations”

Fonseca

Gehara

Werneck

et al. 2018

Journal of Biogeography

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Aim: To assess the effects of historical events on the tempo and mode of diversification of the lizard Polychrus acutirostris along the South American diagonal of open formations (DOF).Location: Caatinga and Cerrado biomes in Brazil. Methods:We sequenced fragments of one mtDNA and three nuDNA genes of 68 individuals from 33 localities. We used population assignment methods to access genetic structure and estimate lineage boundaries. Next, we estimated lineage relationships, intraspecific diversity, environmental niche similarity and demographic history. Finally, we tested 12 diversification scenarios using an approximate Bayesian computation (ABC) approach. Results:We recovered three non-overlapping, geographically structured lineages corresponding to Caatinga, north-east Cerrado and south-west Cerrado, with the major divergence event dating to the Late Neogene. We also recovered a complex scenario of divergence associated with gene flow and niche divergence. Main conclusions:We show a complex history of diversification along the South American DOF. Our findings support the role of environmental features as the likely drivers of P. acutirostris intraspecific diversification during the Late Neogene. K E Y W O R D Sapproximate Bayesian computation, Caatinga, Cerrado, phylogeography, Polychrus acutirostris,

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“…However, all these studies in the neotropics did not consider or fail to find infundibular sperm storage in these species. Considering that recent findings show that squamates display interspecific and intraspecific variation in reproductive tactics (Mesquita and Colli 2003;Carretero 2006;Ribeiro et al 2010;Garda et al 2012;Barros et al 2012Barros et al , 2014a and that environmental conditions are highly different between temperate and tropical regions, would sperm storage patterns also differ among species from the temperate and tropical regions? Would the pattern and function of oviductal secretions show differences among different lineages of snakes?…”

Section: Introductionmentioning

confidence: 99%

Sperm storage and morphofunctional bases of the female reproductive tract of the snake Philodryas patagoniensis from southeastern Brazil

2015

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Macroscopic and microscopic examination of the female reproductive tract of Philodryas patagoniensis was conducted in order to observe sperm storage structures and determine morphological changes throughout the reproductive cycle. The oviduct of P. patagoniensis is composed of the infundibulum (anterior and posterior), uterus, utero-vaginal junction, and vagina. The uterine epithelium showed constant secretory activity throughout the reproductive cycle, although increased production of secretory granules was observed in secondary vitellogenic females. Sperm storage occurs in the posterior infundibulum and utero-vaginal junction in pregnant, primary (postpartum), and secondary vitellogenic females. These data suggest that P. patagoniensis may be able to produce several clutches from a single mating. Sperm storage in the posterior infundibulum occurs in sperm receptacles, while in the utero-vaginal junction sperm is stored in crypts. Histochemical tests by periodic acid-Schiff revealed that both sperm storage sites increase the production of neutral carbohydrate-rich granules in the presence of sperm, similar to snakes from temperate regions. This is the first report of sperm storage in the posterior infundibulum of a neotropical snake.

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Reproduction, Body Size, and Diet of Polychrus acutirostris (Squamata: Polychrotidae) in Two Contrasting Environments in Brazil

Cited by 31 publications

References 40 publications

Fire Regimes and the Demography of the LizardMicrablepharus atticolus(Squamata, Gymnophthalmidae) in a Biodiversity Hotspot

Fire Regimes and the Demography of the LizardMicrablepharus atticolus(Squamata, Gymnophthalmidae) in a Biodiversity Hotspot

Diversification with gene flow and niche divergence in a lizard species along the South American “diagonal of open formations”

Sperm storage and morphofunctional bases of the female reproductive tract of the snake Philodryas patagoniensis from southeastern Brazil

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