Severe population decline of marsh deer, Blastocerus dichotomus (Cetartiodactyla: Cervidae), a threatened species, caused by flooding related to a hydroelectric power plant

Andriolo, Artur; Piovezan, Ubiratan; Costa, Mateus José Rodrigues Paranhos da; Torres, Hermógenes A.; Vogliotti, Alexandre; Zerbini, Alexandre N.; Duarte, José Maurício Barbanti

doi:10.1590/s1984-46702013005000015

Cited by 12 publications

(8 citation statements)

References 21 publications

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“…The impacts of hydroelectric power plants on mammal communities were investigated by several other studies, and species loss is a common effect of reservoir filling (Cosson et al 1999, Fournier-Chambrillon et al 2000, Alho 2011, Andriolo et al 2013. Besides habitat (and area) loss, the increase of predation and competition intensity are possible as factors affecting small non-flying mammals diversity loss in this kind of environmental change (Lemos de Sá 1995, Alho 2011, Andriolo et al 2013, Passamani & Cerboncini 2013.…”

Section: Discussionmentioning

confidence: 99%

Mammal richness and diversity in Serra do Facão region, Southeastern Goiás state, central Brazil

et al. 2015

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., MARINHO FILHO, J. Mammal richness and diversity in Serra do Facão region, Southeastern Goiás state, central Brazil. http://dx.doi.org/10.1590/1676-0611- BN-2015-0033 Abstract: At least 251 mammal species are recorded for the Brazilan cerrado, which, therefore, is the third richest Brazilian biome. Most mammal surveys in Brazilian cerrado result from studies performed opportunistically and in short time periods. The aims of the present study were (1) provide a checklist for the mammalian fauna based on a five-year sampling in Serra do Facão region, Southeastern Goiás state; (2) compare small non-flying mammals diversity in open and forest areas and (3) compare species diversity before and after the flood caused by a hydroelectric reservoir filling. The data was gathered in 19 sampling periods, from May 2008 to September 2013. We sampled open and forest habitats and captured non-flying small mammals with Sherman and Tomahawk live traps and pitfalls; bats were sampled with mist-nets; large mammals were recorded with camera traps, and by direct observations and track surveys in field. We found 20 species of small non-flying mammals, 10 species of bats and 33 species of larger mammals. Species diversity was greater for forest than open habitats, and was also greater before than after the complete reservoir filling. About 10% of the recorded species are included in the Brazilian official list of threatened species. The total richness represents 25% of all cerrado mammal fauna, highlighting the importance of this area for regional mammal fauna conservation. Keywords: cerrado, mammal survey, non-flying mammals, bats, large mammals, hydroelectric reservoir. GOMES

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Section: Discussionmentioning

confidence: 99%

Mammal richness and diversity in Serra do Facão region, Southeastern Goiás state, central Brazil

et al. 2015

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“…This reduction was due to four main factors: the advancement of agricultural and urban frontiers, diseases introduced by domestic cattle, predatory hunting activities and, more recently, the construction of large hydroelectric power plants (Pinder, 1996;Duarte et al, 2012;Andriolo et al, 2013). In view of this situation, the International Union for Conservation of Nature (IUCN) Red List now lists the status of the marsh deer as Vulnerable (VU A4cde) (Duarte et al, 2016).…”

Section: Palavras-chavementioning

confidence: 99%

Accessing camera trap survey feasibility for estimating Blastocerus dichotomus (Cetartiodactyla, Cervidae) demographic parameters

Peres

Polverini

Oliveira

et al. 2017

Iheringia, Sér. Zool.

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ABSTRACT. Demographic information is the basis for evaluating and planning conservation strategies for an endangered species. However, in numerous situations there are methodological or financial limitations to obtain such information for some species. The marsh deer, an endangered Neotropical cervid, is a challenging species to obtain biological information. To help achieve such aims, the study evaluated the applicability of camera traps to obtain demographic information on the marsh deer compared to the traditional aerial census method. Fourteen camera traps were installed for three months on the Capão da Cruz floodplain, in state of São Paulo, and ten helicopter flyovers were made along a 13-kilometer trajectory to detect resident marsh deer. In addition to counting deer, the study aimed to identify the sex, age group and individual identification of the antlered males recorded. Population estimates were performed using the capture-mark-recapture method with the camera trap data and by the distance sampling method for aerial observation data. The costs and field efforts expended for both methodologies were calculated and compared. Twenty independent photographic records and 42 sightings were obtained and generated estimates of 0.98 and 1.06 ind/km², respectively. In contrast to the aerial census, camera traps allowed us to individually identify branch-antlered males, determine the sex ratio and detect fawns in the population. The cost of camera traps was 78% lower but required 20 times more field effort. Our analysis indicates that camera traps present a superior cost-benefit ratio compared to aerial surveys, since they are more informative, cheaper and offer simpler logistics. Their application extends the possibilities of studying a greater number of populations in a long-term monitoring.KEYWORDS. Aerial survey, capture-recapture, distance sampling, population estimate, sex ratio.RESUMO. Avaliação da viabilidade do uso de armadilhas fotográficas para estimar parâmetros demográficos de Blastocerus dichotomus (Cetartiodactyla, Cervidae). Informações demográficas constituem a base para a avaliação e planejamento de estratégias de conservação de uma espécie ameaçada. No entanto, em muitas situações existem limitações metodológicas ou financeiras para a obtenção de tais informações para algumas espécies. O cervo-do-pantanal, um cervídeo neotropical ameaçado de extinção, é uma espécie desafiadora para obtenção de informações biológicas. Para suprir essa demanda, o presente trabalho avaliou a aplicabilidade das armadilhas fotográficas para obtenção de informações demográficas de cervo-do-pantanal em comparação com o tradicional método de censo aéreo. Na várzea Capão da Cruz, Estado de São Paulo, foram instaladas 14 armadilhas fotográficas durante três meses e realizados dez sobrevoos de helicóptero num trajeto de 13 km para detecção dos cervos-do-pantanal ali residentes. Além da contagem dos animais, objetivou-se identificar o sexo, a faixa etária e a identificação individual dos machos galhados registrados. As es...

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“…In the Peixe River, the geomorphological stability of the channel may represent a significant factor because a decrease in cutoffs would affect lakes and wetlands, which maintain an ecosystem with rich biodiversity (SMAESP, 2010). A decrease in cutoffs would also affect the habitats of species in the Peixe River with the highest risk of extinction, e.g., the largest deer in South America (Mauro et al, 1995;Pinder, 1996;SMAESP, 2010;Andriolo et al, 2013). On the other hand, the marked mobility of the channel can be exemplified by their effect on engineering works, such as the structure of the power transmission network that was affected by fluvial dynamics (Fig.…”

Section: Consequences Of Fluvial Adjustmentmentioning

confidence: 99%

Spatiotemporal variations in channel changes caused by cumulative factors in a meandering river: The lower Peixe River, Brazil

Morais¹,

Rocha²,

Hooke

2016

Geomorphology

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Channel changes in meandering rivers naturally exhibit complex behaviour, and understanding the river dynamics can be challenging in environments also subject to cumulative human impacts. Planform changes were analysed on four reaches of the lower course of the Peixe River, Brazil, at decadal scales over the period 1962-2008 from aerial photographs and satellite imagery, complemented by a historical map from 1907. Analysis of the spatial and temporal patterns of channel change mechanisms and morphometry of bends and of the sinuosity and morphodynamic variations of the reaches demonstrates major changes in planform characteristics. Sinuosity in all reaches decreased from~2.6 to~1.7, average wavelength of bends has increased from~200 to~500 m, and the planform has become much simpler. Changes have been progressive from downstream to upstream, with higher intensities of processes, particularly cutoffs first in downstream reaches then more recently in upstream reaches. It is suggested that channel changes represent a morphological adjustment to human interventions, such as reservoir construction and land use. However, evidence of the autogenic behaviour of meanders is highlighted in which the existence of compound meanders reveals control over the spatial variation in the reaches. The results suggest that geomorphic thresholds associated with the compound meander formation and the bend evolution should be considered, even in impacted meandering rivers, because they exert primary controls on the spatial-temporal adjustment of channels.

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Severe population decline of marsh deer, Blastocerus dichotomus (Cetartiodactyla: Cervidae), a threatened species, caused by flooding related to a hydroelectric power plant

Cited by 12 publications

References 21 publications

Mammal richness and diversity in Serra do Facão region, Southeastern Goiás state, central Brazil

Mammal richness and diversity in Serra do Facão region, Southeastern Goiás state, central Brazil

Accessing camera trap survey feasibility for estimating Blastocerus dichotomus (Cetartiodactyla, Cervidae) demographic parameters

Spatiotemporal variations in channel changes caused by cumulative factors in a meandering river: The lower Peixe River, Brazil

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