Dakshin Foundation

Bangalore, India

Dakshin Foundation

Bangalore, India

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Joshi K.K.,Central Marine Fisheries Research Institute | John S.,Dakshin Foundation
ZooKeys | Year: 2013

Two specimens of Valenciennea helsdingenii (Bleeker, 1858) were collected off Punnakayal coast, from Gulf of Mannar, southeast coast of India in November 2012. The morphometric and meristic characters of the recorded specimens are described and discussed. This is the first record of the species from the Indian waters that is a range extension of its known range within the Indian Ocean. © K. Kannan et al.


Kannan K.,Central Marine Fisheries Research Institute | John S.,Dakshin Foundation | Jhonson J.A.,Wildife Institute of India | Zacharia P.U.,Central Marine Fisheries Research Institute CMFRI | Joshi K.K.,Central Marine Fisheries Research Institute CMFRI
Marine Biodiversity Records | Year: 2013

The striated fusilier Caesio striata, is recorded for the first time in Indian waters. A single specimen was caught in the Gulf of Mannar and landed at Tuticorin fisheries harbour in September 2010. © Marine Biological Association of the United Kingdom 2013.


John S.,Wildlife Institute of India | John S.,Dakshin Foundation | Batu M.P.K.,Wildlife Institute of India | Batu M.P.K.,Ms Swaminathan Research Foundation | And 2 more authors.
International Journal of Conservation Science | Year: 2012

In an endeavor to prioritize the conservation of marine environment, species that are threatened were given protection under various Schedules of the Indian Wildlife (Protection) Act, 1972. Though the protection is sturdy on paper, marine fauna, such as sea shells, corals and sea horses are often illegally collected from their natural environment and are traded as marine curiosities. To assess those protected marine species in the curio trade in the state of Tamil Nadu, South India, certain major tourist and pilgrimage hot spots were surveyed during 2007. Among surveyed curio markets, Kanyakumari was found to have an alarming number of protected species being traded through huge number of marine curio shops. 15 species of legally protected mollusks, 10 species of corals and one sea horse species were found, along with other non-protected marine taxa in curio trade. Species protected through Schedule I were often highly priced than those under Schedule IV. The present survey suggests that protected marine species are an integral part in the growing marine curio business. High market demand, coupled with a lack of awareness and an inadequate enforcement were found to be major driving forces for the illegal marine curio trade. Awareness campaigns, along with a promotion of viable and alternate sources of income for seashell coral collectors and strengthening of law enforcement may curtail the illegal marine curio trade.


Kannan K.,Central Marine Fisheries Research Institute CMFRI | John S.,Dakshin Foundation | Joshi K.K.,Central Marine Fisheries Research Institute CMFRI | Zacharia P.U.,Central Marine Fisheries Research Institute CMFRI
Marine Biodiversity Records | Year: 2013

Neobythites stefanovi is recorded for the first time from Indian waters in the Gulf of Mannar. Two specimens were landed as by-catch in trawl gear at Tuticorin fisheries harbour, south-east coast of India, in March 2010. This is also the first record of the species outside the Red Sea, Gulf of Oman and Gulf of Aden, in the western Indian Ocean. © Marine Biological Association of the United Kingdom 2013.


Kannan K.,Central Marine Fisheries Research Institute CMFRI | Joshi K.K.,Central Marine Fisheries Research Institute CMFRI | John S.,Dakshin Foundation | Johnson J.A.,Wildlife Institute of India
Marine Biodiversity Records | Year: 2013

A new record on the occurrence of Neobythites multistriatus which hitherto had not been recorded from the Bay of Bengal is reported. Two specimens measuring 160 and 180 mm standard length were collected from the landings of a deep-sea trawler by-catch at depths of 200-250 m off the Tuticorin coast in the Gulf of Mannar (part of the Bay of Bengal) during March 2010. This is the first record of Neobythites multistriatus from the Bay of Bengal. The specimen is described and figured. © Marine Biological Association of the United Kingdom 2013.


Suresh Kumar R.,Wildlife Institute of India | John S.,Dakshin Foundation | Sivakumar K.,Wildlife Institute of India | Choudhury B.C.,Wildlife Institute of India
Herpetological Journal | Year: 2013

The olive ridley sea turtle Lepidochelys olivacea is known for its unusual behaviour of locally nesting en masse in the eastern Pacific and the east coast of India, leading to difficulties in quantifying population size. In the present study we estimate nesting population sizes in the state of Orissa, taking average egg laying or oviposition duration (OD) into account. We observed 182 and 263 nesting turtles during mass nesting events of 2009 and 2010 to estimate ODs of 19.8±5.8 and 17.2±5.9 minutes, respectively. Clutch size averaged 123.1±10.5 for 2009 and 124.3±18.6 for 2010, which is 10 to 20% more than the global clutch size of 100-110 eggs, and appears to have resulted in a longer OD than previously assumed. Using the average OD from this study, 172,407±7509 and 134,478±6204 turtles were estimated to have nested during 2009 and 2010 respectively, contrasting the 200,000-250,000 turtles reported by the Forest Department. Our results suggest that a minimum of 150 egg laying turtles across each night of the mass nesting period is required to be observed for an accurate quantification of OD.


Oommen M.A.,Center for Herpetology Madras Crocodile Bank Trust | Oommen M.A.,Dakshin Foundation | Shanker K.,Indian Institute of Science
Biology Letters | Year: 2010

Mixed-species foraging associations may form to enhance feeding success or to avoid predators. We report the costs and consequences of an unusual foraging association between an endemic foliage gleaning tupaid (Nicobar treeshrew Tupaia nicobarica) and two species of birds; one an insectivorous commensal (greater racket-tailed drongo Dicrurus paradiseus) and the other a diurnal raptor and potential predator (Accipiter sp.). In an alliance driven, and perhaps engineered, by drongos, these species formed cohesive groups with predictable relationships. Treeshrew breeding pairs were found more frequently than solitary individuals with sparrowhawks and were more likely to tolerate sparrowhawks in the presence of drongos. Treeshrews maintained greater distances from sparrowhawks than drongos, and permitted the raptors to come closer when drongos were present. Treeshrew foraging rates declined in the presence of drongos; however, the latter may provide them predator avoidance benefits. The choice of the raptor to join the association is intriguing; particular environmental resource states may drive the evolution of such behavioural strategies. Although foraging benefits seem to be the primary driver of this association, predator avoidance also influences interactions, suggesting that strategies driving the formation of flocks may be complex and context dependent with varying benefits for different actors. © 2009 The Royal Society.

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