Reproduction and diet of Imantodes cenchoa (Dipsadidae: Dipsadinae) from the Brazilian Amazon

Sousa, Kellen R. M. de; Prudente, Ana Lúcia da Costa; Maschio, Gleomar Fabiano

doi:10.1590/s1984-46702014000100002

Cited by 14 publications

(8 citation statements)

References 69 publications

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“…In the cluster analysis we used the Unweighted Pair-Group Method of Arithmetic Averages (UPGMA) or group mean (Sneath & SOkal 1973, kreBS 1989, based on the Jaccard Similarity Index (Cj). For all specimens analyzed, a longitudinal incision was made in the ventral region for observations on diet and reproduction.…”

Section: Methodsmentioning

confidence: 99%

“…Cluster analysis (manly 1994) was performed by means of the Sorensen similarity coefficient, which gives greater weight to presence than to absence (kreBS 1989), due to the lack of information for some species. In the cluster analysis we used the Unweighted Pair-Group Method of Arithmetic Averages (UPGMA) or group mean (Sneath & SOkal 1973, kreBS 1989, based on the Jaccard Similarity Index (Cj). For all specimens analyzed, a longitudinal incision was made in the ventral region for observations on diet and reproduction.…”

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confidence: 99%

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Snake assemblages of Marajó Island, Pará state, Brazil

Rodrigues

Maschio

Prudente

2016

Zoologia (Curitiba)

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ABSTRACT. We describe the diversity, natural history and structure of snake assemblages from Marajó Island, state of Pará, Brazil, after analyzing 439 specimens deposited in herpetological collections. We tested the hypothesis that snake assem- on habit and habitat. In all, 19 species were exclusive to forest areas, 10 were exclusive to open areas and 26 species were recorded in both areas. Our results revealed greater richness for forested areas, probably due to greater habitat heterogeneity.The species composition for forested area in Marajó was similar to that found in other Amazonian assemblages, while that for open areas was more similar to the Pantanal region than other open area assemblages. The general structure of the snake assemblage of Marajó was dominated by anurophagous, terrestrial and diurnal species. Terrestrial, arboreal and semi-arboreal snakes showed a seasonal offspring production pattern, while the pattern for aquatic and semi-aquatic species was aseasonal.The structure of assemblages was influenced by both historical and ecological factors. KEY WORDS. Amazon, assemblage, functional groups, herpetofauna.GM Rodrigues et al.ZOOLOGIA 33(1): e20150020 | DOI: 10.1590/S1984-4689zool-20150020 2 / 13 produced a list of 38 snake species. Subsequently, yuki & SantOS (1996) listed 52 species of snakes for these two islands using specimens deposited in the MPEG. This set of data resulted in a list of snake species for the island but did not include details about their structure and functional groups.Given that Marajó Island includes both densely forested and open areas, we test the hypothesis that their snake assemblages are distinct with regard to structure, composition and functional groups. Additionally, we compared the snake composition of forested versus open areas of Marajó with comparable assemblages in other regions of Brazil. We provided more detailed information on natural history, including diet, reproduction and species distribution throughout the island. MATERIAL AND METHODSMarajó Island, located between the Brazilian states of Amapá and Pará (0°59'39"S, 49°44'25"W), has an area of approximately 49,000 km 2 (gOulding et al. 2003), being delimited to the south by the Pará River, to the north by the Atlantic Ocean, to the east by the Marajó Bay and to the west by the mouth of the Amazon River. Three distinct ecological regions can be found on the island: dense forests predominate in the western half; successional formations or alluvial fields cover almost its entire eastern half; and Cerrado (natural grasslands) (BritO & ilkiu-BOrgeS 2013) predominates in small areas of the central-north and south eastern regions of the island (radam 1974) (Fig. 1). Our main objective was to test if there are differences between the snakes assemblages of forested and open areas of the island. To make the comparison more robust we considered both the successional formations and the Cerrado together as comprising open habitat.There is a distinct relationship between the vegetational distribution on the island...

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Section: Methodsmentioning

confidence: 99%

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confidence: 99%

Snake assemblages of Marajó Island, Pará state, Brazil

Rodrigues

Maschio

Prudente

2016

Zoologia (Curitiba)

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“…Imantodes cenchoa feeds on amphibians and lizards Oliveira 1998, Sousa et al 2014). Its litter can range from 1 to 7 eggs (Martins and Oliveira 1998, Pizzatto et al 2008, Fraga et al 2013, Sousa et al 2014.…”

Section: Family Colubridae Oppel 1811mentioning

confidence: 99%

Snakes of the Pernambuco Endemism Center, Brazil: diversity, natural history and conservation

França¹,

Morais²,

França³

et al. 2020

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The Atlantic Forest is one of the largest and richest tropical rainforests on the planet, being one of the 25 world priorities for conservation. The Atlantic Forest portion located north of the São Francisco River corresponds to the Pernambuco Endemism Center (PEC). We describe the snake composition of the PEC, providing information about the diversity, natural history and geographical distribution of the species, based on records from five scientific collections and additional information from the literature. A total of 78 species of snakes distributed in eight families was registered in the Pernambuco Endemism Center. The Caatinga is the Brazilian biome that most shares species with the PEC, followed by Cerrado. On the other hand, seven species are considered endemic of this region. Most of the snake species in the PEC have been registered in forest (94.8%), followed by “Brejos Nordestinos” (46.1%), Tabuleiros (43.5%), Restingas (14.1%) and Mangroves (5.1%). The PEC snake fauna includes mainly terrestrial species (60.2%) and cryptozoic and/or fossorial species (21.7%), but also presents a high richness of semi-arboreal and arboreal species (29.5%). Vertebrates are the main food item consumed by the species (78% of species), among the main prey are mammals, lizards, and amphibians. Most species show a strictly nocturnal activity period (50%), followed by strictly diurnal (38%). The PEC is the most degraded and least known region of the Atlantic Forest, yet it has revealed a high richness of snake species, including seven endemic species. It is emphasized that regional conservation efforts need to be intensified, because few forests in the region are formally protected, and the majority consist of small and poorly protected fragments, which means that many species in the region may be in risk of extinction.

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“…Studies dealing with the feeding ecology or just new prey records are of great importance, because they show potencies available food resources to be used, as well as the energy flow among the different taxonomic groups, on this case trophic interaction among snakes and fishes. Sousa et al (2014) describe that obtaining more detailed elements, from the studies feeding ecology how, ongenetic variation, bioenergy, predator-prey relationship or records of new prey is a key step to better understand the trophic ecology of snakes in temperate regions. Thereat, this paper aims to record for the first time the predation of Sternopygus macrurus (Gymnotiformes: Sternopygidae) by the snake Micrurus surinamensis in a natural reserve of Amazonia, Brazil.…”

Section: (With 1 Figure)mentioning

confidence: 99%