Influência do esforço amostral na riqueza de espécies de morcegos no sudeste do Brasil

Esbérard, Carlos Eduardo Lustosa; Bergallo, Helena Godoy

doi:10.1590/s0101-81752008000100010

Cited by 25 publications

(34 citation statements)

References 12 publications

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“…However, rare species may be added at any time during the survey, and a large number of rare species could be added only with large sampling effort. Very common species, such as members of the genus Artibeus, Carollia perspicillata (Linnaeus, 1758) and Sturnira lilium (E. Geoffroy, 1810) (ESBÉRARD & BERGALLO 2008), were added during the first sampling nights. Common species such as Desmodus rotundus (E Geoffroy, 1810), Glossophaga soricina (Pallas, 1766) and Anoura caudifer (E.Geoffroy, 1818) (ESBÉRARD & BERGALLO 2008) were also added near the beginning of the sampling period.…”

Section: Discussionmentioning

confidence: 99%

“…Very common species, such as members of the genus Artibeus, Carollia perspicillata (Linnaeus, 1758) and Sturnira lilium (E. Geoffroy, 1810) (ESBÉRARD & BERGALLO 2008), were added during the first sampling nights. Common species such as Desmodus rotundus (E Geoffroy, 1810), Glossophaga soricina (Pallas, 1766) and Anoura caudifer (E.Geoffroy, 1818) (ESBÉRARD & BERGALLO 2008) were also added near the beginning of the sampling period. Species represented by one or two specimens appear randomly during the survey period and were observed on average every 4.83 sampling nights at Ilha da Gipóia and 5.25 nights at Rio das Pedras Reserve.…”

Section: Discussionmentioning

confidence: 99%

“…Sampling was conducted with up to 13 mist nets of size 9 x 2.5 m with 36 mm mesh, that were opened at ground level along forest edges, on established trails, over water bodies and close to fruiting trees (ESBÉRARD 2003, ESBÉRARD & BERGALLO 2008 and conducted throughout the night and in all moon phases. The two localities considered in this analysis were: (a) Rio das Pedras Reserve at km 55 of BR 101 road (22°59'26.4 "S and 44°06'03.2" W), with 1,361 ha and comprising areas from the coast up to 1,150 m a.s.l., including abandoned banana plantations, second-growth areas and primary forests (see ESBÉRARD & BERGALLO 2008) and (b) Ilha da Gipóia, located in the municipality of Angra dos Reis (23°02'20.36"S, 44°21'34.80"W), which is one of the largest islands of the state (13.5 km 2 ), 0.8 km far from the continent, and has approximately 80% of its area covered with late second-growth forest resulting from regeneration and reforestation, with an estimated age of 115-130 years. Part of the data from Rio das Pedras Reserve were recently published (ESBÉRARD & BERGALLO 2008 Captures at roosts were not considered and nets remained at the same place during all field work at Ilha da Gipóia and during most of the sampling (32 nights) in Rio das Pedras Reserve.…”

Section: Methodsmentioning

confidence: 99%

“…Twenty or more species have been described in surveys in the Atlantic Forest of southeastern Brazil (e.g. ESBÉRARD 2003, DIAS & PERACCHI 2008, ESBÉRARD & BERGALLO 2008. It has been difficult to analyze which inventories are well-sampled but a minimum of 1,000 captures has been recommended for the Phyllostomidae of the Atlantic Forest of southeastern Brazil (BERGALLO et al 2003).…”

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Capture sequence and relative abundance of bats during surveys

Esbérard

2009

Zoologia (Curitiba, Impr.)

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ABSTRACT. It is expected that rare species will be gradually added to biodiversity surveys over time and that complete inventories will include rare species. The objective in the present work is to test whether the capture sequence of species during a bat survey is related to species abundance. Species with capture rates lower than 0.01x10 -3 captures/hour-net were considered rare. At Ilha da Gipóia, rare species accounted for 22.22% of the total and, at Rio das Pedras Reserve, they represented 30.00%. The existence of a negative relationship between the relative abundance and the first night of capture of each species for the Ilha da Gipóia and the high significance level for the accumulation curve at both localities suggest that the documentation of a large number of rare species depends on a sustained capture effort. The common species were captured at the beginning of the field work and the remaining species were typically added to the collection according to their approximate relative abundance. However, rare or seldomly captured species were added at random.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

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Capture sequence and relative abundance of bats during surveys

Esbérard

2009

Zoologia (Curitiba, Impr.)

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“…Sampling efficiency was compared using species accumulation curves (Esbérard and Bergallo, 2008). Sampling effort (expressed as camera.h) was based and modified Srbek-Araujo and Chiarello (2005), whereas frequency of occurrence (number of captures of a species/total number of captures, expressed as percentage) followed Prado et al (2008), and relative proportion followed Tobler et al (2008).…”

Section: Methodsmentioning

confidence: 99%

Comparison of two mammalian surveys made with camera traps in southeastern Brazil, focusing the abundance of wild mammals and domestic dogs

Carvalho

Adania²,

Esbérard

2013

Braz. J. Biol.

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Sampling allows assessing the impact of human activities on mammal communities. It is also possible to assess the accuracy of different sampling methods, especially when the sampling effort is similar. The present study aimed at comparing two mammalian surveys carried out over a three-year interval, in terms of sampling effort, capture success, abundance of domestic dogs, impact of human activities, and relative biomass using camera traps, in the Serra do Japi Biological Reserve and surroundings, located in Jundiaí, state of São Paulo, southeastern Brazil. The total richness recorded was 13 species, one domestic and 12 wild mammals. Sampling effort in both surveys was similar, but capture success and number of captures differed. The abundance of wild mammals and dogs did also differ between surveys. There was a highly significant correlation between abundance of wild mammals and capture effort for the survey performed in 2006/2007, but not for the survey performed in 2009/2010. The difference between samples may be related to human disturbance, since the number of domestic mammals photographed was higher in the second survey, three years after the first survey. Despite being a reserve, the area is still under pressure from urbanization, biological invasion, environmental degradation, and hunting, which may reduce the abundance of wild mammals.Keywords: survey, diversity, domestic animals, methods, nature reserves.Comparação entre duas amostragens de mamíferos feitas com armadilhas fotográficas no sudeste do Brasil, com foco na abundância de mamíferos silvestres e cães domésticos Resumo Uma das formas de avaliar o impacto das atividades humanas nas comunidades de mamíferos e ter maior conhecimento e acurácia sobre o método utilizado é realizar amostragens, proporcionando a comparação do método, principalmente quando o esforço amostral é semelhante. O presente estudo visou a comparar dois levantamentos de mamíferos realizados na mesma área com três anos de intervalo, quanto aos seguintes aspectos: esforço amostral, sucesso de captura, abundância de cães domésticos, presença de atividades humanas e biomassa relativa das espécies. A riqueza total obtida nos dois períodos de amostragem foi de 13 espécies, sendo 12 espécies selvagens e uma de animal doméstico. O esforço de amostragem para as duas pesquisas foi semelhante, porém o sucesso de captura foi diferente, quando comparados entre si. A abundância de mamíferos selvagens e cães também mostrou diferenças entre os dois períodos. A correlação entre a abundância de mamíferos selvagens e o esforço de captura provou ser altamente significativa para a amostragem realizada em 2006/2007, mas não foi significativa para a realizada em 2009/2010. A diferença entre as amostras pode estar ligada à perturbação humana nesse ambiente, já que o número de animais domésticos fotografados foi maior após três anos de amostragem. Apesar de ser uma área de conservação, também está sujeita a pressões, como especulação imobiliária, invasões, destruição e caça, o que pode estar dim...

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