Sri Lankan frogs study

This video says about itself:

Mangrove Restoration in Sri Lanka – A Global Nature Fund Post-Tsunami Project

The video is part of the Global Nature Fund’s project to restore mangrove forests and livelihoods in Sri Lanka after the Tsunami of 2004.

The project aims at the re-establishment of livelihoods of affected communities, restoration of Tsunami affected areas and long-term environmental education. The main target groups are about 1,000 families from poor communities in the lake areas of Bolgoda, Maduganga and Madampe in Sri Lanka.

From the Environment Sri Lanka Blog:

How do Sri Lankan shrub frogs Philautus popularis spend their night time: Field observations from Bolgoda wetland complex

By lakmali | March 17, 2010

Sri Lanka is an amphibian hot spot providing home for 109 species. Nevertheless, studies on ecology and biology of amphibians of Sri Lanka are scarce and behaviour of frogs has drawn even less attention. Philautus popularis (Ranidae, Rhacophorinae; Manamendra-Arachchi & Pethiyagoda, 2005) is an endemic shrub frog which occurs in the low country wet zone. This study attempts to report behavioural spectrum of P. popularis in an undisturbed wetland in an urban area. Study site comprised of two locations in Bolgoda south lake wetland complex (790 52’ – 790 59’ north longitude and 060 42’ – 060 51’ east latitude).

This study was carried out for one months starting from mid June 2009 from 1800 hrs onwards. On each study date, a random path was chosen to walk till a frog was found. The observations were made according to focal animal sampling method, by the naked eye. When an animal was found the total behavioural pattern was studied carefully from a point 1 m away from the frog. Times spent on different behavioural activities were noted. A total of 64617 seconds (nearly 18 hours) were spent on different behavioural activities.

Twenty nine individuals (26 males and 3 females) were studied and seven behavioural events were encountered: acoustic, locomotion, resting (No movements), foraging, agonistic, cleaning and sexual behaviour. Time taken for each behaviour was compiled taking both sexes into consideration. The most abundant behaviour event was resting without any movement (45% of the total time) but sometimes they showed feeding in between. When activities are considered, they were found spending more time for calling (27.1%, males only) and sexual behavior including amplexus (25%). Interestingly, agonistic behaviour was shown by males and time taken was 2.1% of total. Walking, cleaning, jumping and climbing took a negligible proportion of the total time and were less than 0.2 percent. Calling was observed from 1800-2300 and they were silent from 0130-0530 and then started acoustic signals again.

Perch height of males varied from 40-160 cm from the ground and the highest point was reached around midnight. Females were always near the ground (5-15cm). Males are territorial and it is likely that their home range is within a 5m radius.

This shrub frog used minimum time to climbing locomotion pattern and then jumping. The most abundant locomotion pattern was walking, spent 59.6% from the total time for locomotion to the walking. 3 Different perched postures were recorded and climbing position was recorded. Perched height and time has significant relationship respect to both study sites. There is no any preferred plant species for Philautus popularis. They spent 1380 seconds on agonistic behaviour, 2% of the total behavioural observation time. They spent time of 16,200 seconds in amplexing. They hide under leaf litter during day time.

H.G.S.K. Dayananda and D.D. Wickramasinghe
Department of Zoology, University of Colombo, Sri Lanka.

The tadpole of Ramanella palmata (Anura: Microhylidae), a frog endemic to Sri Lanka: here.

Sri Lanka Reptile and Amphibian Foundation points out that a number of endemic species to the country have become extinct in recent past: here.

Lankan reptiles not for export or exploitation, says environmentalist – Sunday here.

3 thoughts on “Sri Lankan frogs study

  1. Vets strike to help elephants

    Sri Lanka: Wildlife veterinarians have gone on strike to protest at the government’s failure to do more to help the islands elephants.

    “The government allows people to encroach into traditional elephant homelands,” vets’ union leader Vijitha Perera explained.

    Mr Perera said the five-day strike was aimed at highlighting what he called “the escalating conflict” between humans and elephants which left at least 50 people and 228 elephants dead last year.


  2. Pingback: World’s rarest toad rediscovered in Sri Lanka | Dear Kitty. Some blog

  3. Pingback: New Sri Lankan frog discovery | Dear Kitty. Some blog

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