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Vandalūr, India

Rajagopal T.,Ayya Nagar Janaki Ammal College Autonomous | Sekar M.,Arignar Anna Zoological Park | Manimozhi A.,Arignar Anna Zoological Park | Baskar N.,Arignar Anna Zoological Park | Archunan G.,Bharathidasan University
Journal of Environmental Biology | Year: 2011

Investigation was earned out on the diversity of butterfly fauna in selected localities of conservation and breeding center of Arignar Anna Zoological Park (AAZP), Chennai, Tamil Nadu. A total of 56 species were recorded, 15 of them belonged to Pieridae, 12 Nymphalidae, 9 Satyridae, 8 Papilionidae, 7 Danaidae, 3 Lycaenldae and 1 species each belonged to the families Acraeidae and Hesperidae. Qualitatively and quantitatively Pieridae family were comparatively dominant than that of other families. The notable addition to the 25 more species listed during this observation were compared to previous field survey. Comparison of butterfly species distribution between the different localities revealed that butterfly species richness was higher at mountain region with 52 species and lowest of 25 species at public visiting areas. Visitor's activities may be that reason for effects on butterfly distribution and lack of vegetation. Each five endemic and protected species (i.e. endangered) listed under the Wildlife (Protection) Act were highlighted greater conservation importances of the AAZP. It is suggest that butterfly species diversity generally increase with increase in vegetation and declines with the increase in disturbance. © 2011 Triveni Enterprises Vikas Nagar, Lucknow, INDIA. Source


Rajagopal T.,Bharathidasan University | Rajagopal T.,Ayya Nadar Janaki Ammal College Autonomous | Archunan G.,Bharathidasan University | Sekar M.,Arignar Anna Zoological Park
Journal of Applied Animal Welfare Science | Year: 2011

This study investigated behavioral activities (resting, moving, aggressive, social, and reproductive behavior) and fecal cortisol levels in 8 individually identified adult male blackbucks during periods of varying levels of zoo visitors (zero, low, high, and extremely high zoo visitor density). This study also elucidated whether zoo visitor density could disturb nonhuman animal welfare. This study analyzed fecal cortisol from the samples of blackbuck by radioimmunoassay and found significant differences (p < .05) for time the animals devoted to moving, resting, aggressive, reproductive, and social behavior on days with high and extremely high levels of zoo visitors. The ANOVA with Duncan's Multiple Range Test test showed that the fecal cortisol concentration was higher (p < .05) during the extremely high (137.30 ± 5.88 ng/g dry feces) and high (113.51 ± 3.70 ng/g dry feces) levels of zoo visitor density. The results of the study suggest that zoo visitor density affected behavior and adrenocortical secretion in Indian Blackbuck, and this may indicate an animal welfare problem. © Taylor & Francis Group, LLC. Source


Rajagopal T.,Bharathidasan University | Thangamani A.,Ayya Nadar Janaki Ammal College Autonomous | Sevarkodiyone S.P.,Ayya Nadar Janaki Ammal College Autonomous | Sekar M.,Arignar Anna Zoological Park | Archunan G.,Bharathidasan University
Journal of Environmental Biology | Year: 2010

Plankton diversityand physico-chemical parameters are an important criterion for evaluating the suitability of water for irrigation and drinking purposes. In this study, we tried to assess the zooplankton species richness, diversity, and evenness and to predict the state of three perennial ponds according to physico-chemical parameters. A total of 47 taxa were recorded: 24 rotifers, 9 copepods, 8 cladocerans, 4 ostracods and 2 protozoans. More number of zooplankton species were recorded in Chinnapperkovil pond (47 species) followed by Nallanchettipatti (39 species) and Kadabamkulam pond (24 species). Among the rotifers, Branchionus sp. is abundant. Diaphanosoma sp. predominant among the cladocerans. Among copepods, numerical superiority was found in the case of Mesocyclopes sp. Cypris sp. repeated abundance among ostracoda. Present study revealed that zooplankton species richness (R1 and R2) was comparatively higher(R1:4.39; R2:2.13) in Chinnapperkovil pond. The species diversity was higher in the Chinnapperkovil pond (H 2.53; N1:15.05;N2:15.75) ascomparedtootherponds. The water samples were analyzed for temperature, pH, electrical conductivity, alkalinity, salinity, phosphate, hardness, dissolved oxygen and biological oxygen demand. Higher value of physico-hemical parameters and zooplankton diversity were recorded in Chinnapperkovil pond as compared to other ponds. The zooplankton population shows positive significant correlation with physico-chemical parameters like, temperature, alkalinity, phosphate, hardness and biological oxygen demand, whereas negatively correlated with rainfall and salinity. The study revealed that the presence of certain species like, Monostyla sp., Keratella sp., Lapadella sp., Leydigia sp., Moinodaphnia sp., Diaptomus sp., Diaphanosoma sp., Mesocyclopes sp., Cypris sp. and Brachionus sp. is considered to be biological indicator for eutrophication. © Triveni Enterprises, Lucknow (India). Source


Rajagopal T.,Bharathidasan University | Manimozhi A.,Arignar Anna Zoological Park | Archunan G.,Bharathidasan University
Biological Rhythm Research | Year: 2011

Scent marking is a common behaviour among mammals, which involves the deposition of a pheromone, intended to elicit a response from conspecifics. The present study is aimed to establish the diurnal profile of the distribution of scent marking behaviour and its influence of the marker. The frequency of preorbital gland scent marking behaviour was observed in territorial and non-territorial male Indian blackbucks on 72 days, over a period of 18 weeks, starting data collection at 06.00 and continuing until the end of the photophase at about 16.00. An ANOVA with post hoc (DMRT) test was assessed to compare the frequency of preorbital gland scent marking at six 2-hour intervals using pooled data for territorial and non-territorial males. The result showed that the preorbital gland scent marking behaviour occurred significantly (P<0.001) more often between 10:00-12:00hrs and 16:00-18:00hrs. It suggests that scent-marking behaviour in Indian blackbuck has a preferential incidence at a particular time, and this might have occurred in association with feeding hours. Moreover, an ANOVA with a post hoc comparison (DMRT) test revealed that the frequency of scent marking is significant (P<0.001) when territorial males are compared to non-territorial males. We conclude that territorial male preorbital gland scent marking has the following proposed functions: (i) marking related to use for defense of the home range or territorial region may serve as a permanent threat signal and (ii) marking related to suppressing daily activities in non-territorial males (i.e. feeding, aggression, mating, scent marking, and territorial patrolling activities etc.), and involves maintenance of hierarchy and the avoidance of physical combat. © 2011 Taylor & Francis. Source

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