We studied the population records of House Sparrow Passer domesticus 16 th to 20 th December 2011... more We studied the population records of House Sparrow Passer domesticus 16 th to 20 th December 2011 during winter in Ramakrishna Beach Road Vishakhapatnam town, Andhra Pradesh. The ecological density of House Sparrow was investigated using fixed width transects. A total of 189 House sparrows were recorded. The present study shows that a notable population of House Sparrow in Beach Road.
ABSTRACT: The present paper deals with diversity, abundance and variations of water birds at Koll... more ABSTRACT: The present paper deals with diversity, abundance and variations of water birds at Kolleru wetland. The study was carried out for a period of five years from March 2007 to July, 2012. A total of 232 species of birds belonging to 62 families and 115 genera were recorded. Among which 101 species are water birds, 133 species are terrestrial birds of which 83 species recorded as migratory birds and 14 species as local migrants. The mean Water bird population varies from 258.36 + 1420.14 to 95.10 + 500.28 whereas terrestrial bird populations 2.47 + 5.72 to 1.69 + 3.73 which is significantly very low. The maximum numbers of 123 species were recorded in the month of March 2007-08 and the minimum number of species about 30 was recorded in the month of July 2010-11. The diversity index is fluctuating with an increasing and decreasing sequence ranging from 1 to 5.3 in overall bird populations and 0.5 to 2.3 in waterfowl populations. Likewise, the diversity and evenness showed variat...
Perennial and non-perennial water bodies attract large number of waterfowls during winter season.... more Perennial and non-perennial water bodies attract large number of waterfowls during winter season. Due to over exploitation of these water bodies the winter visitors are facing several threats. Among the threats poaching activity is the main reason for decline of water birds in many wetland areas. The present study highlighted poaching activity at 8 different Perennial and non-perennial tanks of Nalgonda district of Telangana state. The techniques adopted by the local people for trapping the birds vary significantly. The mortality of the water birds in both the tanks showed high for Ducks (3644) followed by waders (2805) during the study period. Among the ducks Lesser Whistling Teal mortality was predominantly high (26.3) followed by Pintail (24.12), Gargany, (19.54), Pochard (10.2) Spotbilled duck (7.30), Comb duck (6.92) and Shovellor (5.87) while in non-perennial tanks mortality high in Pintails (29.83) followed by Garganey (22.40), Lesser whistling teal (22.08), Pochard (8.63), Spotted billed duck (7.06), Comb duck (6.92) and Shovellor (4.87). The other birds such as Coots were also significantly found in the catches which ranged between 106 - 154 birds. The percentage of birds killed showed increasing trends in all the years of study and ranges between 4.2 to 71.9%. The overall percent catches were significantly high for coots in both perennial and non-perennial tanks.
The present investigation is about foraging behavior of insectivorous bird species Black Drongo (... more The present investigation is about foraging behavior of insectivorous bird species Black Drongo (Dicrurus macrocercus) in Nalgonda District of Andhra Pradesh, India. The study was carried out from December 2010 to March 2013. 1114 foraging observations bird used a variety of perch types for hunting the prey; in general the electric power lines was a frequent perch type used 63%, classified in to 3 meter categories up to 12 m height, perching heights (N=1104) principally used 9-12 m and foraging heights (N=466) 6-9 m 48 %. While the use of foraging substrate (N=331) as plants 59% and aerial feeding (N=151) were key feeding technique recorded 52%. In Perch types, perching and foraging heights, foraging substrates and foraging methods based on the above studies, it is recognized that foraging behavior of Black Drongo are mostly interlinked with habitat and accessibility of food resources.
We studied the amphibian community structure, spatial overlap and herpetofaunal assemblage at Man... more We studied the amphibian community structure, spatial overlap and herpetofaunal assemblage at Mannampandal, Tamil Nadu during October, 2010 to January, 2011. The survey methods involved careful visual estimation of amphibi-ans in all the possible microhabitats present in the study area. Five different microhabitat categories were selected, viz., leaf litters, temporary water pools, tree holes, shrubs & grasses (ground vegetation), pathways, open floor & outer edges of buildings. We identified 26 species of reptiles and 14 species of amphibians. There was a significant difference found among the amphibian species occupying in different microhabitats. Species diversity was calculated, Shanon-Wiener H'= 1.55. The high niche overlap was found between Duttaphrynus scaber and Uperodon systoma followed by Fejervarya sp. and Sphaerotheca breviceps. The present study on amphibian community is just a representation to show the micro-habitat occupancy and adjustment by the amphibians in hu...
We studied the population records of House Sparrow Passer domesticus 16th to 20th December 2011 d... more We studied the population records of House Sparrow Passer domesticus 16th to 20th December 2011 during winter in Ramakrishna Beach Road Vishakhapatnam town, Andhra Pradesh. The ecological density of House Sparrow was investigated using fixed width transects. A total of 189 House sparrows were recorded. The present study shows that a notable population of House Sparrow in Beach Road.
Foraging niche of Small Green Bee-eater , Indian Roller, CommonMyna and Black Drongo was studied ... more Foraging niche of Small Green Bee-eater , Indian Roller, CommonMyna and Black Drongo was studied in and around agricultural landscapes of Sherpally, Nalgonda District of Telangana, India. Data on perch types, perching height, foraging height, foraging substrates types and foraging methods were transformed into percent use. Small Green Bee-eater predominantly perched onelectric power lines (67.21%), Common Myna used plants (75.44%) as a substrate and gleaning was the common feeding technique used by all the birds with height of 0-3m, Indian Roller fed mostlyat 3-6m (30.91%). Black Drongo and Indian Roller had the highest niche overlap (0.96) forperchtypeswhile the lowestoverlapwasobserved forsmall Green Bee-eaterandCommon Myna (0.34) in the foraging substrate.
Nehru Zoological Park, Hyderabad, Telangana, India, has been involved in captive breeding program... more Nehru Zoological Park, Hyderabad, Telangana, India, has been involved in captive breeding programmes, including eggs of silver pheasant (Lophura nycthemera), red jungle fowl (Gallus gallus), kalij pheasant (Lophura leucomelanos) and golden pheasant (Chrysolophus pictus) incubated by domestic hen (Gallus gallus domesticus). It proved successful in almost all cases. Here, we attempted to do the same for the sarus crane (Grus antigone), which is listed in Schedule I of the Wildlife (Protection) Act 1972, vulnerable species on IUCN Red List 2012, Appendix II of CITES, and Appendix II of the Convention on Migratory Species. It is the largest bird in India and the tallest flying bird in the world (Sundar et al., 2000; Sundar & Choudhury 2003; Sundar, 2009).
We studied the population records of House Sparrow Passer domesticus 16th to 20th December
2011 d... more We studied the population records of House Sparrow Passer domesticus 16th to 20th December 2011 during winter in Ramakrishna Beach Road Vishakhapatnam town, Andhra Pradesh. The ecological density of House Sparrow was investigated using fixed width transects. A total of 189 House sparrows were recorded. The present study shows that a notable population of House Sparrow in Beach Road.
We studied the population records of House Sparrow Passer domesticus 16 th to 20 th December 2011... more We studied the population records of House Sparrow Passer domesticus 16 th to 20 th December 2011 during winter in Ramakrishna Beach Road Vishakhapatnam town, Andhra Pradesh. The ecological density of House Sparrow was investigated using fixed width transects. A total of 189 House sparrows were recorded. The present study shows that a notable population of House Sparrow in Beach Road.
ABSTRACT: The present paper deals with diversity, abundance and variations of water birds at Koll... more ABSTRACT: The present paper deals with diversity, abundance and variations of water birds at Kolleru wetland. The study was carried out for a period of five years from March 2007 to July, 2012. A total of 232 species of birds belonging to 62 families and 115 genera were recorded. Among which 101 species are water birds, 133 species are terrestrial birds of which 83 species recorded as migratory birds and 14 species as local migrants. The mean Water bird population varies from 258.36 + 1420.14 to 95.10 + 500.28 whereas terrestrial bird populations 2.47 + 5.72 to 1.69 + 3.73 which is significantly very low. The maximum numbers of 123 species were recorded in the month of March 2007-08 and the minimum number of species about 30 was recorded in the month of July 2010-11. The diversity index is fluctuating with an increasing and decreasing sequence ranging from 1 to 5.3 in overall bird populations and 0.5 to 2.3 in waterfowl populations. Likewise, the diversity and evenness showed variat...
Perennial and non-perennial water bodies attract large number of waterfowls during winter season.... more Perennial and non-perennial water bodies attract large number of waterfowls during winter season. Due to over exploitation of these water bodies the winter visitors are facing several threats. Among the threats poaching activity is the main reason for decline of water birds in many wetland areas. The present study highlighted poaching activity at 8 different Perennial and non-perennial tanks of Nalgonda district of Telangana state. The techniques adopted by the local people for trapping the birds vary significantly. The mortality of the water birds in both the tanks showed high for Ducks (3644) followed by waders (2805) during the study period. Among the ducks Lesser Whistling Teal mortality was predominantly high (26.3) followed by Pintail (24.12), Gargany, (19.54), Pochard (10.2) Spotbilled duck (7.30), Comb duck (6.92) and Shovellor (5.87) while in non-perennial tanks mortality high in Pintails (29.83) followed by Garganey (22.40), Lesser whistling teal (22.08), Pochard (8.63), Spotted billed duck (7.06), Comb duck (6.92) and Shovellor (4.87). The other birds such as Coots were also significantly found in the catches which ranged between 106 - 154 birds. The percentage of birds killed showed increasing trends in all the years of study and ranges between 4.2 to 71.9%. The overall percent catches were significantly high for coots in both perennial and non-perennial tanks.
The present investigation is about foraging behavior of insectivorous bird species Black Drongo (... more The present investigation is about foraging behavior of insectivorous bird species Black Drongo (Dicrurus macrocercus) in Nalgonda District of Andhra Pradesh, India. The study was carried out from December 2010 to March 2013. 1114 foraging observations bird used a variety of perch types for hunting the prey; in general the electric power lines was a frequent perch type used 63%, classified in to 3 meter categories up to 12 m height, perching heights (N=1104) principally used 9-12 m and foraging heights (N=466) 6-9 m 48 %. While the use of foraging substrate (N=331) as plants 59% and aerial feeding (N=151) were key feeding technique recorded 52%. In Perch types, perching and foraging heights, foraging substrates and foraging methods based on the above studies, it is recognized that foraging behavior of Black Drongo are mostly interlinked with habitat and accessibility of food resources.
We studied the amphibian community structure, spatial overlap and herpetofaunal assemblage at Man... more We studied the amphibian community structure, spatial overlap and herpetofaunal assemblage at Mannampandal, Tamil Nadu during October, 2010 to January, 2011. The survey methods involved careful visual estimation of amphibi-ans in all the possible microhabitats present in the study area. Five different microhabitat categories were selected, viz., leaf litters, temporary water pools, tree holes, shrubs & grasses (ground vegetation), pathways, open floor & outer edges of buildings. We identified 26 species of reptiles and 14 species of amphibians. There was a significant difference found among the amphibian species occupying in different microhabitats. Species diversity was calculated, Shanon-Wiener H'= 1.55. The high niche overlap was found between Duttaphrynus scaber and Uperodon systoma followed by Fejervarya sp. and Sphaerotheca breviceps. The present study on amphibian community is just a representation to show the micro-habitat occupancy and adjustment by the amphibians in hu...
We studied the population records of House Sparrow Passer domesticus 16th to 20th December 2011 d... more We studied the population records of House Sparrow Passer domesticus 16th to 20th December 2011 during winter in Ramakrishna Beach Road Vishakhapatnam town, Andhra Pradesh. The ecological density of House Sparrow was investigated using fixed width transects. A total of 189 House sparrows were recorded. The present study shows that a notable population of House Sparrow in Beach Road.
Foraging niche of Small Green Bee-eater , Indian Roller, CommonMyna and Black Drongo was studied ... more Foraging niche of Small Green Bee-eater , Indian Roller, CommonMyna and Black Drongo was studied in and around agricultural landscapes of Sherpally, Nalgonda District of Telangana, India. Data on perch types, perching height, foraging height, foraging substrates types and foraging methods were transformed into percent use. Small Green Bee-eater predominantly perched onelectric power lines (67.21%), Common Myna used plants (75.44%) as a substrate and gleaning was the common feeding technique used by all the birds with height of 0-3m, Indian Roller fed mostlyat 3-6m (30.91%). Black Drongo and Indian Roller had the highest niche overlap (0.96) forperchtypeswhile the lowestoverlapwasobserved forsmall Green Bee-eaterandCommon Myna (0.34) in the foraging substrate.
Nehru Zoological Park, Hyderabad, Telangana, India, has been involved in captive breeding program... more Nehru Zoological Park, Hyderabad, Telangana, India, has been involved in captive breeding programmes, including eggs of silver pheasant (Lophura nycthemera), red jungle fowl (Gallus gallus), kalij pheasant (Lophura leucomelanos) and golden pheasant (Chrysolophus pictus) incubated by domestic hen (Gallus gallus domesticus). It proved successful in almost all cases. Here, we attempted to do the same for the sarus crane (Grus antigone), which is listed in Schedule I of the Wildlife (Protection) Act 1972, vulnerable species on IUCN Red List 2012, Appendix II of CITES, and Appendix II of the Convention on Migratory Species. It is the largest bird in India and the tallest flying bird in the world (Sundar et al., 2000; Sundar & Choudhury 2003; Sundar, 2009).
We studied the population records of House Sparrow Passer domesticus 16th to 20th December
2011 d... more We studied the population records of House Sparrow Passer domesticus 16th to 20th December 2011 during winter in Ramakrishna Beach Road Vishakhapatnam town, Andhra Pradesh. The ecological density of House Sparrow was investigated using fixed width transects. A total of 189 House sparrows were recorded. The present study shows that a notable population of House Sparrow in Beach Road.
Uploads
Papers by Laxmi Narayana
2011 during winter in Ramakrishna Beach Road Vishakhapatnam town, Andhra Pradesh. The
ecological density of House Sparrow was investigated using fixed width transects. A total of 189
House sparrows were recorded. The present study shows that a notable population of House Sparrow
in Beach Road.
2011 during winter in Ramakrishna Beach Road Vishakhapatnam town, Andhra Pradesh. The
ecological density of House Sparrow was investigated using fixed width transects. A total of 189
House sparrows were recorded. The present study shows that a notable population of House Sparrow
in Beach Road.