Search published articles


Showing 5 results for Ecology
Body shape variation of Garra rufa (Heckel) (Teleostei: Cyprinidae) using geometric and morphometric techniques
Mazaher Zamani-Faradonbe, Yazdan Keivany, Salar Dorafshan, Mojtaba Abbasi-Jeshvaghani,
Volume 2, Issue 1 (3-2020)
Abstract
Organisms can adapt to habitat conditions that ensure their survival. Habitat separation can lead to different populations of body shape during the phenotypic plasticity process. Both traditional and modern (geometric) morphology are being used in fish population studies. In this study, the body shape differences between Garra rufa (Heckel) populations captured in the Jarrahi River (from the Tigris Basin) were investigated using traditional and geometric morphometric methods. The samples were captured from the Rostam Abad, Aghajari and Behbahan tributaries and transferred to the laboratory. For the traditional morphometric analysis, 10 meristic characters and 19 morphometric characters were measured. Geometric morphological information was extracted using 13 landmark points on left side photographs of individual fish. According to the results of the traditional morphometric analysis, there were differences between the three populations in meristic (lateral line scales, predorsal scales, circamucaudal scales) and morphometric (14 of 19 characters) traits. In the geometric morphometric analysis, the major part of the shape variation is due to landmark points in the head region and the dorsal fin base, with the anal fin and caudal peduncle being the most conservative body regions. The populations had significant differences in body shape with populations from Aghajari and Behbahan tributaries being most similar and the Rostam Abad population was different from the two other populations.

First record of the Long-snouted Bhutan Squirrel Dremomys lokriah bhotia (Wroughton, 1916) (Mammalia: Rodentia) from the state of West Bengal, India
Paromit Chatterjee, Kamalika Bhattacharyya, Silanjan Bhattacharyya,
Volume 4, Issue 1 (3-2022)
Abstract
We present the first confirmed report of the Long-snouted Bhutan Squirrel Dremomys lokriah bhotia from the state of West Bengal, India. Previously the subspecies was known from limited localities of East Sikkim (India) and Bhutan. This article, thus, adds to the global knowledge of the subspecies with a note on its habitat and activity pattern, along with new details on it’s current global distribution.
 

Survival strategy–Temporal segregation of different age and sex classes of a Bengal tiger (Panthera tigris tigris Linnaeus) population in Pench Tiger Reserve, Madhya Pradesh India
Aniruddha Majumdar,
Volume 5, Issue 3 (10-2023)
Abstract
Temporal activity patterns of different age and sex classes of a Bengal tiger population were studied at Pench Tiger Reserve, Madhya Pradesh between May 2006 and July 2009 using systematic camera traps. Based on the exact time of photo-capture tigers, information on temporal activity patterns of following age and sex categories of individual tigers (resident male (n= 55 photographs), female with cubs or breeding female (n= 70 photographs), female without cubs or non-breeding female (n= 72 photographs) and transient male (n= 42 photographs)) were recorded. Breeding females utilized significantly different activity period compared to transient males (P< 0.001) and females without cubs (P<0.001). Overall activity period between breeding female and resident male did not differ significantly (P >0.6) during the study period. The observed temporal segregation may provide valuable information on cub survival strategies adopted by breeding tigresses, potentially enhancing their reproductive success in a tropical deciduous forest. The adoption of camera trap-based population monitoring studies is advocated for the reproductive behavior of elusive large carnivores such as tigers in the wild on a long-term basis.

Fruit bats (Pteropodidae) in select green spaces of Davao City, Mindanao, Philippines: a preliminary assessment
Cyrell Ann Ruales, Christian Tripole, Joshua Donato, Marian Dara Tagoon, Elsa May Delima-Baron,
Volume 5, Issue 4 (10-2023)
Abstract
Published data on bats in green spaces in Davao City, Mindanao, Philippines, remains scarce. This study provides an additional account of fruit bats of the family Pteropodidae occurring in green spaces both in the center of Davao City and its fringe communities. Our survey ran from January to April 2019. Mist nets were installed in possible flyways within select green spaces of bats and were checked from 6:30 pm to 4:30 am. Eight fruit bat species were documented, four of which are endemic to the Philippines. Two species, Megaerops wetmorei Taylor, 1934 and Eonycteris robusta Miller, 1913, are currently listed as vulnerable (VU), while the rest are considered non-threatened in the IUCN Red List of Threatened Species. The site in the Carmen Baguio district (Site 5) had the highest number of captures (n= 31), while the Mt. Talomo-Lipadas site (Site 6) had the highest species richness among surveyed green spaces. The inventory suggests that fruit bats occur in urban green spaces and could be supported by these urban green fragments. More studies are needed to determine how fruit bats utilize and benefit from urban green space fragments of the city.



 

A review of Szulkin, M., J. Munshi-South, and A. Charmantier, eds. 2020. Urban Evolutionary Biology. Oxford University Press, Oxford, 303 pp. ISBN 978-0-19-883685-8
Shalini Tudu, Amith S J, Chetan Nag K.s.,
Volume 6, Issue 1 (3-2024)
Abstract
In this Anthropocene epoch, where every single ecosystem on Earth is heavily shaped, both in space and time, by human deeds, natural landscapes are being rapidly replaced by urbanization. Henceforth, a new urban biome has arisen displaying certain unique properties, making cities around the globe a perfect place to investigate “natural” processes like ecology, evolution, adaptation, and biodiversity, away from their more natural forested counterparts. Interestingly, despite conurbations, or extended urban habitats, being thought of as adversaries of Mother Nature, organisms in urban environments are learning to adapt and survive, making them novel sources for evolutionary variation. Regrettably, despite advancements in methods to answer questions in ecology and evolutionary biology, there is a lack of knowledge about how urbanization influences evolution and its processes in an urban milieu. There is a dire need to understand issues such as the operational repercussions of urbanization, and the roles of evolutionary transformation in urban community dynamics.

Page 1 from 1     

  | Journal of Animal Diversity

Designed & Developed by : Yektaweb