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K. Sankar - One of the best experts on this subject based on the ideXlab platform.
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Prey abundance and Prey Selection by tigers panthera tigris in a semi arid dry deciduous forest in western india
Journal of Zoology, 2003Co-Authors: S. Bagchi, S. P. Goyal, K. SankarAbstract:Food habits of tigers Panthera tigris in terms of Prey abundance were studied in the semi-arid deciduous forests of Ranthambhore National Park, western India, between November 2000 and April 2001. Wild Prey availability was assessed by line transects (n = 8) and Prey Selection by the tigers was determined from analysis of scats (n = 109). Compared to some other parts of the country, Prey abundance was found to be high at 96.65 animals km − 2 . Chital Axis axis wa st he most abundant wild Prey in the study area, followed by common langur Presbytis entellus, sambar Cervus unicolor ,n ilgai Boselaphus tragocamelus, wild pig Sus scrofa and chinkara Gazella bennetti. Chital (c. 31%) and sambar (c. 47%) constituted the bulk of the tigers’ diet and were preferred Prey. Nilgai and chinkara contributed minimally to the tigers’ diet (c. 5–7% and < 1%, respectively) and were used less than their availability. Domestic livestock made up 10–12% of the tigers’ diet. The average weight of an animal consumed was between 107 and 114 kg reflecting a preference for large Prey. The analysis reveals that parts of Ranthambhore have high Prey abundance, thus making it important for long-term tiger conservation. Despite the high Prey abundance, tigers were still considerably dependent on domestic livestock, posing challenges for the park management to resolve potential areas of conflict.
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Prey Abundance and Prey Selection by Tigers (Panthera tigris) in a Semi-arid, Dry Deciduous Forest in Western India
2002Co-Authors: S. Bagchi, S. P. Goyal, K. SankarAbstract:Food habits of tigers Panthera tigris in terms of Prey abundance were studied in the semi-arid deciduous forests of Ranthambhore National Park, western India, between November 2000 and April 2001. Wild Prey availability was assessed by line transects (n = 8) and Prey Selection by the tigers was determined from analysis of scats (n = 109). Compared to some other parts of the country, Prey abundance was found to be high at 96.65 animals km − 2. Chital Axis axis was the most abundant wild Prey in the study area, followed by common langur Presbytis entellus, sambarCervus unicolor, nilgai Boselaphus tragocamelus, wild pig Sus scrofa and chinkaraGazella bennetti. Chital (c. 31%) and sambar (c. 47%) constituted the bulk of the tigers ’ diet and were preferred Prey. Nilgai and chinkara contributed minimally to the tigers ’ diet (c. 5–7 % and< 1%, respectively) and were used less than their availability. Domestic livestock made up 10–12 % of the tigers ’ diet. The average weight of an animal consumed was between 107 and 114 kg reflecting a preference for large Prey. The analysis reveals that parts of Ranthambhore have high Prey abundance, thus making it important for long-term tiger conservation. Despite the high Prey abundance, tigers were still considerably dependent on domestic livestock, posing challenges for the park management to resolve potential areas of conflict. Key words: food habits, line transect, Panthera tigris, tiger, Prey Selection, scat analysi
S. Bagchi - One of the best experts on this subject based on the ideXlab platform.
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Prey abundance and Prey Selection by tigers panthera tigris in a semi arid dry deciduous forest in western india
Journal of Zoology, 2003Co-Authors: S. Bagchi, S. P. Goyal, K. SankarAbstract:Food habits of tigers Panthera tigris in terms of Prey abundance were studied in the semi-arid deciduous forests of Ranthambhore National Park, western India, between November 2000 and April 2001. Wild Prey availability was assessed by line transects (n = 8) and Prey Selection by the tigers was determined from analysis of scats (n = 109). Compared to some other parts of the country, Prey abundance was found to be high at 96.65 animals km − 2 . Chital Axis axis wa st he most abundant wild Prey in the study area, followed by common langur Presbytis entellus, sambar Cervus unicolor ,n ilgai Boselaphus tragocamelus, wild pig Sus scrofa and chinkara Gazella bennetti. Chital (c. 31%) and sambar (c. 47%) constituted the bulk of the tigers’ diet and were preferred Prey. Nilgai and chinkara contributed minimally to the tigers’ diet (c. 5–7% and < 1%, respectively) and were used less than their availability. Domestic livestock made up 10–12% of the tigers’ diet. The average weight of an animal consumed was between 107 and 114 kg reflecting a preference for large Prey. The analysis reveals that parts of Ranthambhore have high Prey abundance, thus making it important for long-term tiger conservation. Despite the high Prey abundance, tigers were still considerably dependent on domestic livestock, posing challenges for the park management to resolve potential areas of conflict.
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Prey Abundance and Prey Selection by Tigers (Panthera tigris) in a Semi-arid, Dry Deciduous Forest in Western India
2002Co-Authors: S. Bagchi, S. P. Goyal, K. SankarAbstract:Food habits of tigers Panthera tigris in terms of Prey abundance were studied in the semi-arid deciduous forests of Ranthambhore National Park, western India, between November 2000 and April 2001. Wild Prey availability was assessed by line transects (n = 8) and Prey Selection by the tigers was determined from analysis of scats (n = 109). Compared to some other parts of the country, Prey abundance was found to be high at 96.65 animals km − 2. Chital Axis axis was the most abundant wild Prey in the study area, followed by common langur Presbytis entellus, sambarCervus unicolor, nilgai Boselaphus tragocamelus, wild pig Sus scrofa and chinkaraGazella bennetti. Chital (c. 31%) and sambar (c. 47%) constituted the bulk of the tigers ’ diet and were preferred Prey. Nilgai and chinkara contributed minimally to the tigers ’ diet (c. 5–7 % and< 1%, respectively) and were used less than their availability. Domestic livestock made up 10–12 % of the tigers ’ diet. The average weight of an animal consumed was between 107 and 114 kg reflecting a preference for large Prey. The analysis reveals that parts of Ranthambhore have high Prey abundance, thus making it important for long-term tiger conservation. Despite the high Prey abundance, tigers were still considerably dependent on domestic livestock, posing challenges for the park management to resolve potential areas of conflict. Key words: food habits, line transect, Panthera tigris, tiger, Prey Selection, scat analysi
S. P. Goyal - One of the best experts on this subject based on the ideXlab platform.
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Prey abundance and Prey Selection by tigers panthera tigris in a semi arid dry deciduous forest in western india
Journal of Zoology, 2003Co-Authors: S. Bagchi, S. P. Goyal, K. SankarAbstract:Food habits of tigers Panthera tigris in terms of Prey abundance were studied in the semi-arid deciduous forests of Ranthambhore National Park, western India, between November 2000 and April 2001. Wild Prey availability was assessed by line transects (n = 8) and Prey Selection by the tigers was determined from analysis of scats (n = 109). Compared to some other parts of the country, Prey abundance was found to be high at 96.65 animals km − 2 . Chital Axis axis wa st he most abundant wild Prey in the study area, followed by common langur Presbytis entellus, sambar Cervus unicolor ,n ilgai Boselaphus tragocamelus, wild pig Sus scrofa and chinkara Gazella bennetti. Chital (c. 31%) and sambar (c. 47%) constituted the bulk of the tigers’ diet and were preferred Prey. Nilgai and chinkara contributed minimally to the tigers’ diet (c. 5–7% and < 1%, respectively) and were used less than their availability. Domestic livestock made up 10–12% of the tigers’ diet. The average weight of an animal consumed was between 107 and 114 kg reflecting a preference for large Prey. The analysis reveals that parts of Ranthambhore have high Prey abundance, thus making it important for long-term tiger conservation. Despite the high Prey abundance, tigers were still considerably dependent on domestic livestock, posing challenges for the park management to resolve potential areas of conflict.
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Prey Abundance and Prey Selection by Tigers (Panthera tigris) in a Semi-arid, Dry Deciduous Forest in Western India
2002Co-Authors: S. Bagchi, S. P. Goyal, K. SankarAbstract:Food habits of tigers Panthera tigris in terms of Prey abundance were studied in the semi-arid deciduous forests of Ranthambhore National Park, western India, between November 2000 and April 2001. Wild Prey availability was assessed by line transects (n = 8) and Prey Selection by the tigers was determined from analysis of scats (n = 109). Compared to some other parts of the country, Prey abundance was found to be high at 96.65 animals km − 2. Chital Axis axis was the most abundant wild Prey in the study area, followed by common langur Presbytis entellus, sambarCervus unicolor, nilgai Boselaphus tragocamelus, wild pig Sus scrofa and chinkaraGazella bennetti. Chital (c. 31%) and sambar (c. 47%) constituted the bulk of the tigers ’ diet and were preferred Prey. Nilgai and chinkara contributed minimally to the tigers ’ diet (c. 5–7 % and< 1%, respectively) and were used less than their availability. Domestic livestock made up 10–12 % of the tigers ’ diet. The average weight of an animal consumed was between 107 and 114 kg reflecting a preference for large Prey. The analysis reveals that parts of Ranthambhore have high Prey abundance, thus making it important for long-term tiger conservation. Despite the high Prey abundance, tigers were still considerably dependent on domestic livestock, posing challenges for the park management to resolve potential areas of conflict. Key words: food habits, line transect, Panthera tigris, tiger, Prey Selection, scat analysi
A C Smaal - One of the best experts on this subject based on the ideXlab platform.
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blue mussel mytilus edulis l association with conspecifics affects mussel size Selection by the common seastar asterias rubens l
Journal of Sea Research, 2020Co-Authors: Antonio Aguera, J M Jansen, A C SmaalAbstract:Abstract Prey Selection by predators is of interest to community ecologists. By choosing some Prey over others, predators affect Prey population dynamics and the strength of food webs. According to Optimal Diet Theory (ODT), as Prey density increases predators will select more profitable Prey. Thereby, Prey population dynamics can also affect predator behaviour. Prey profitability involves the Prey energetic value, energetic costs associated to predation (time spent searching, capturing and handling Prey) and certain characteristics such as body size, abundance and behaviour. We examined the effect of the blue mussel (Mytilus edulis) association with conspecifics at different densities on Prey Selection and behaviour by the seastar Asterias rubens. Contrary to ODT prediction, when mussels were tightly clumped in high densities, the size range of the mussels consumed by A. rubens did not differ of the size range of the mussel population. Mussel association at high density caused seastars to feed locally, reducing their exposition to risks. Moreover, Preying without selecting for a specific mussel size did not result in a decrease of net profit, rather it was increased. We concluded that under certain circumstances, not selecting Prey results in an increase of net profit at Prey size. We discuss our results in the context of the mussel industry where the effect of Prey Selection on the Prey population dynamics is of importance. Mussel size Selection by seastars, as described in previous works, will impact the size distribution of mussels within cultured populations affecting growth of the population and reproductive output among others, thus increasing the impact of seastar predation beyond that of just removing mussels from the population. However, this study shows that seastars Prey upon availability at high densities, typically encountered in cultivated populations, and therefore their effect on mussel population is restricted to removal of mussels without affecting the size distribution of the population.
Jf Kamler - One of the best experts on this subject based on the ideXlab platform.
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Diet, Prey Selection, and activity of Asian golden cats and leopard cats in northern Laos
'Oxford University Press (OUP)', 2020Co-Authors: Vongkhamheng C, Inthapanya X, Jf Kamler, Rasphone A, Johnson A, Bousa A, Macdonald DAbstract:The Asian golden cat (Catopuma temminckii) occurs in small, declining, and highly fragmented populations throughout Southeast Asia, whereas the smaller leopard cat (Prionailurus bengalensis) is common and widespread. In contrast to leopard cats, little is known about the ecology of Asian golden cats, and resource partitioning between these species has not been studied. We used DNA-confirmed scats, camera-trap data, and Prey surveys, to determine the diet, Prey Selection, and activity of Asian golden cats and leopard cats in a protected area in northern Laos. The two felids had different diets: Asian golden cats consumed mostly ungulates (35% biomass consumed), murid rodents (23%), and carnivores (15%), whereas leopard cats consumed mostly murid rodents (79%). Asian golden cats were not random in their consumption of ungulates, because muntjac (Muntiacus spp.) were selectively consumed over larger ungulates, indicating muntjac were Preyed upon rather than scavenged. Dietary overlap between the two felid species was relatively low (R0 = 0.60), and the dietary niche breadth of Asian golden cats (B = 8.44) was nearly twice as high as that of leopard cats (4.54). The mean (±SD) scat diameter was greater for Asian golden cats (2.1 ± 0.3 cm) than leopard cats (1.8 ± 0.2 cm), although diameters of leopard cat scats were considerably larger than previously assumed for this species. The felid species differed in their activity patterns, as Asian golden cats were diurnal whereas leopard cats were nocturnal, although they did not differ in their use of elevation, suggesting there was no habitat segregation. Overall, leopard cats appeared to coexist with Asian golden cats, a potential predator and competitor, by exhibiting dietary and temporal partitioning. Our results showed that muntjac were important Prey of Asian golden cats, suggesting the management of muntjac might be important for conserving populations of Asian golden cats
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Diet and Prey Selection of dholes in evergreen and deciduous forests of Southeast Asia
'Royal College of Obstetricians & Gynaecologists (RCOG)', 2020Co-Authors: Rostro-garcia S, Vongkhamheng C, Jf Kamler, Johnson A, Bousa A, Thatdokkham K, Caragiulo A, Crouthers R, Prum S, Pay CAbstract:Endangered dholes (Cuon alpinus) are restricted to small and declining populations in Southeast Asia, and little is known about how their ecology differs within the region. We used DNA‐confirmed scats and Prey surveys to determine the seasonal diet and Prey Selection of dholes in 2 different landscapes that dominate Southeast Asia: closed evergreen forests in hilly terrain in northern Laos, and open deciduous forests in relatively flat terrain in eastern Cambodia. On both sites, muntjac (Muntiacus spp.; 20–28 kg) was the dominant Prey item and was selectively consumed over other ungulates in all seasons. Our findings differ from previous conclusions, based largely on studies from India, that the preferred Prey weight range of dholes was either 40–60 kg or 130–190 kg. Other important Prey were sambar (Rusa unicolor) in Laos, and wild pig (Sus scrofa) and banteng (Bos javanicus) in Cambodia. Seasonal differences in overall diet occurred in Laos, but not Cambodia, primarily because of an increase in livestock consumption. The mean number of dhole scats in group defecation sites was higher in Cambodia (5.9 ± 0.5 [SE]) than Laos (2.4 ± 0.2), suggesting pack sizes were larger in Cambodia. Our results suggest that regardless of land cover type, Prey diversity, or pack size, the management of muntjac will be important for conserving dhole populations in Southeast Asia. In Laos, we recommend that local villagers remove livestock from the protected area during the hot‐dry season to reduce livestock predation by dholes
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Diet, Prey Selection, and activity of Asian golden cats and leopard cats in northern Laos
'Oxford University Press (OUP)', 2020Co-Authors: Vongkhamheng C, Inthapanya X, Jf Kamler, Rasphone A, Johnson A, Bousa A, Macdonald DAbstract:The Asian golden cat (Catopuma temminckii) occurs in small, declining, and highly fragmented populations throughout Southeast Asia, whereas the smaller leopard cat (Prionailurus bengalensis) is common and widespread. In contrast to leopard cats, little is known about the ecology of Asian golden cats, and resource partitioning between these species has not been studied. We used DNA-confirmed scats, camera-trap data, and Prey surveys, to determine the diet, Prey Selection, and activity, of Asian golden cats and leopard cats in a protected area in northern Laos. The two felids had different diets: Asian golden cats consumed mostly ungulates (35% biomass consumed), murid rodents (23%), and carnivores (15%), whereas leopard cats consumed mostly murid rodents (79%). Asian golden cats were not random in their consumption of ungulates, because muntjac (Muntiacus spp.) were selectively consumed over larger ungulates, indicating muntjac were Preyed upon rather than scavenged. Dietary overlap between the two felid species was moderate (R0 = 0.60), and the dietary niche breadth of Asian golden cats (B = 8.44) was nearly twice as high as that of leopard cats (4.54). The mean (± SD) scat diameter was greater for Asian golden cats (2.1 ± 0.3 cm) than leopard cats (1.8 ± 0.2 cm), although diameters of leopard cat scats were considerably larger than previously assumed for this species. The felid species differed in their activity patterns, because Asian golden cats were diurnal, whereas leopard cats were nocturnal, although they did not differ in their use of elevation, suggesting there was no habitat segregation. Overall, leopard cats appeared to coexist with Asian golden cats, a potential predator and competitor, by exhibiting dietary and temporal partitioning. Our results showed that muntjac were important Prey of Asian golden cats, suggesting the management of muntjac might be important for conserving populations of Asian golden cats
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An adaptable but threatened big cat: density, diet and Prey Selection of the Indochinese leopard (Panthera pardus delacouri) in eastern Cambodia
'The Royal Society', 2018Co-Authors: Rostro-garcia S, Jf Kamler, Caragiulo A, Crouthers R, Prum S, Sopheak K, Pin C, Dw MacdonaldAbstract:We studied the Indochinese leopard (Panthera pardus delacouri) in eastern Cambodia, in one of the few potentially remaining viable populations in Southeast Asia. The aims were to determine the: (i) current leopard density in Srepok Wildlife Sanctuary (SWS) and (ii) diet, Prey Selection and predation impact of leopard in SWS. The density, estimated using spatially explicit capture–recapture models, was 1.0 leopard/100km2, 72% lower than an estimate from 2009 at the same site, and one of the lowest densities ever reported in Asia. Dietary analysis of 73 DNA confirmed scats showed leopard consumed 13 Prey species, although ungulates comprised 87% of the biomass consumed (BC). The overall main Prey (42% BC) was banteng (Bos javanicus), making this the only known leopard population whose main Prey had adult weight greater than 500 kg. Consumption of wild pig (Sus scrofa) was also one of the highest ever reported (22% BC), indicating leopard consistently predated on ungulates with some of the largest adult weights in SWS. There were important differences in diet and Prey Selection between sexes, as males consumed mostly banteng (62% BC) in proportion to availability, but few muntjac (Muntiacus vaginalis; 7% BC), whereas females selectively consumed muntjac (56% BC) and avoided banteng (less than 1% BC). Predation impact was low (0.5–3.2% of populations) for the three ungulate species consumed. We conclude that the Indochinese leopard is an important apex predator in SWS, but this unique population is declining at an alarming rate and will soon be eradicated unless effective protection is provided
