Big new spider species discovery in Sri Lanka


A male Poecilotheria rajaei

From Wildlife Extra:

New tarantula species the size of an ipad discovered in Sri Lanka

New spiders grow up to 8 inches across

April 2013. A large new species of tarantula has been discovered in Sri Lanka. At 8 inches across, the new tarantula isn’t as large as the Goliath bird eating tarantula of South America, which can grow up to 12 inches. Poecilotheria rajaei (as the new spider has been named) would still be as long as an ipad screen. It is also quite fast for a spider, and venomous.

The tarantula was discovered back in 2009 when a villager in Mankulam, up in the northern part of Sri Lanka, provided Ranil Nanayakkara (Co-founder of the Biodiversity Education And Research (BEAR) organisation) with a dead male specimen. Further live specimens were then found in the village’s former doctor’s living quarters. It was quickly established that it was different to any species known from Sri Lanka at that time.

This group of tarantulas are commonly referred to variously as the Indian and Sri Lankan Ornamental Tarantulas, Parachute Spiders, Tiger Spiders, etc. but the scientific name is Poecilotheria rajaei (named after Inspector Michael Rajakumar Purajah – who was instrumental in allowing Ranil and his team access to the areas they needed to get to). It is an arboreal tarantula, so in its natural habitat it prefers to live in holes in trees or similar such crevices.

It belongs to a group of brightly coloured tarantulas from India and Sri Lanka which we can differentiate from one another by the pattern of black bands on the underside of their legs and, in this particular species and one other, a pale, ventral abdominal band.

Adapted to living in houses!

It is the first of what we believe are several new species of tarantula that have been located in this previously inaccessible region of Sri Lanka. Although this species is scarce as a consequence of its natural habitat having been destroyed, it has been able to adapt and has started to encroach on the ‘artificial trees’ that human habitation provides.

Our thanks to The British Tarantula Society & Ranil Nanayakkara.

New snake discovery in Sri Lanka


This video says about itself:

Crocodile Hunter – Island of Snakes

Feb 12, 2012

Steve Irwin travels to Sri Lanka to help laborers contend with some of the most venomous snakes in the world. And, for the first time in his life, he goes head-to-head with a man-eating Mugger crocodile.

All rights belong to Discovery Communications, Inc.

This video says about itself:

Thailand Blind Snake Not Poisonous. Smallest Snake in World?

These are super small snakes from Thailand. I found 2 in my restroom. They climb up through the drain from outside. I lost one of these small black snakes in the house – don’t tell “da wife”.

The name of this snake: Brahminy Blind Snake

Very common in Thailand. In just about every potted plant we have it seems like, as well as climbing up through our drains. They eat termite and ant eggs primarily. They can’t bite you – their mouths are too small. They live in the dark – inside the soil – just like a worm, but not worms.

Google “Ramphotyphlops braminus” the technical name, and check out the Wikipedia entry. Looks a lot like this one – right?

From Wildlife Extra:

New genus of snake recognised on Sri Lanka

Sri Lanka is a much bigger hotspot for biodiversity than previously known

March 2013. An assistant biology professor from George Washington University has discovered a new genus of the blindsnake in Sri Lanka.

Using DNA sequencing to determine its relationship to other snakes, Dr. Pyron thought the blindsnake -found right in the yard of an environmental agency office-would be a new species. Amazingly it turned out to be a complete new genus.

“When we sequenced the snake’s DNA, we discovered that it was an entirely new lineage of blindsnake,” Dr. Pyron said. “It’s still a blindsnake, but a new genus, a group of blindsnakes that had never been described.”

60 known species of snakes in Sri Lanka

Along with the discovery of the new group, Dr. Pyron and researchers confirmed the identity of 60 known species of snakes in Sri Lanka, using DNA sequencing technology on 40 of them to help researchers understand how various snakes are related to each other and their evolutionary relationship to other species around the world.

“We found that Sri Lanka has been colonized by snakes at least five times by totally different snake groups, which have each diversified heavily within the island,” said Dr. Pyron, a Robert F. Griggs Assistant Professor of Biology.

That means that even though researchers know a lot about the snakes on the island, there’s still more to be discovered-and previous research to be corrected.

Sri Lanka is a much bigger hotspot for biodiversity than previously known

“The DNA data are telling us new stories about how they are related, completely contradicting what we thought we knew,” he said. “It tells us that Sri Lanka is a much bigger hotspot for biodiversity than previously known, and harbours massive richness.”

Researchers can also use the findings to draw conclusions about evolutionary biology and species diversity more broadly.

Their findings, which appear in the March edition of the journal Molecular Phylogenetics and Evolution, show just how rich snake biodiversity is on the island.

Antarctic blue whales, new research


This video is called Worlds Largest Blue Whale colony – Discovered in Sri Lanka.

From Wildlife Extra:

2 Blue whales given satellite tags in the Antarctic

New acoustic devices prove successful for tracking Blue whales

March 2013. A recent research expedition to the Antarctic, using acoustic devices to locate Blue whales, has proved very successful. By using sound rather than sight to initially detect the whales, scientists significantly improved the likelihood of finding and counting whales in the vast Southern Ocean. The research is a core part of an Australian-led international project to estimate the abundance, distribution and behaviour of the species that was decimated in the early 1900s when industrial whaling killed approximately 250,000 animals.

The sonobuoys allowed researchers to record more than 500 hours of audio including more than 20,000 blue whale vocalisations. Two Blue whales were given satellite tags to enable scientists to track their migration, which, it is hoped, will provide vital information on their behaviour and biology.

The 2013 expedition achievements included:

626 hours of acoustic recordings in the sample area; 26,545 calls of Antarctic blue whale were analysed in real time; 43 acoustic groups were targeted, with an 85% success rate.
Identification of 57 individual Antarctic blue whales using photos, plus 11 pygmy blue whales. Identification of 23 individual Antarctic blue whales using biopsy samples, plus 8 humpback whales.
Satellite tags on 2 Antarctic blue whales; both transmitting locations for more than 15 days so far.
100 specimens of Antarctic krill collected for genetics research.

Non-lethal techniques

These statistics do not tell the whole story. Importantly this voyage demonstrated a suite of non-lethal techniques, including acoustic tracking, satellite tagging, photographic and genetic identification, which can be used to study the elusive Antarctic blue whales. The information gathered on this voyage will go towards answering the big question about just how many of these animals remain in the oceans today.

Once the ship has reached New Zealand, the real work begins in analysing the huge data set collected over the past seven weeks.

A spokesman for the crew said “The offices we go back to won’t heave with each wave and the outlook will be less exhilarating, but the work will be equally satisfying and worthwhile. Papers have to be prepared for the International Whaling Commission meeting in Korea in June and the methods, tested and proven on this voyage, will be communicated to our colleagues in the Southern Ocean Research Partnership.”

Asian elephants’ social networks research


This video is called The Asian Elephant – Two Species.

From Wildlife Extra:

Asian elephants have intricate social networks

Social networking elephants never forget

December 2012. Asian elephants typically live in small, flexible, social groups centred around females and calves while adult males roam independently. However, new research shows that while Asian elephants in Sri Lanka may change their day to day associations they maintain a larger, stable, network of friends from which they pick their companions.

Social networking

Researchers followed the friendships among over a hundred female adult Asian elephants in the Uda Walawe National Park in Sri Lanka for five seasons and analysed how these relationships changed over time. While the elephants tended to congregate in groups containing three adult females, there could be as many as 17 in a single group. Social strategies were also variable, with some elephants always being seen in each other’s company while others were ‘social butterflies’ who frequently changed companions. Surprisingly, 16% completely changed their ‘top five’ friends over the course of the study. Elephants who had few companions were very faithful to them, whereas those who had many tended to be less loyal.

Analysis of elephant ‘ego-networks’ showed that Asian elephants tended to also associate with larger sets of companions, especially in dry seasons. Social bonds were especially strong when resources were scarce, even to the extent of expelling unfamiliar elephants from sources of water. This may be due in part to the ecology of their environment, because other elephants, which live in drier areas, congregate in greater numbers in wet seasons. It was previously thought that, unlike African savannah elephants, Asian elephants had no extensive social affiliations, but at the population level, extensive clusters of interconnected groups were discovered.

Trunk calls

Dr Shermin de Silva from the University of Pennsylvania explained that, “Elephants are able to track one another over large distances by calling to each other and using their sense of smell. So the ‘herd’ of elephants one sees at any given time is often only a fragment of a much larger social group. Our work shows that they are able recognize their friends and renew these bonds even after being apart for a long time.”

The research was published in published in BioMed Central’s open access journal BMC Ecology.

Elephants being poached in Burma: here.

Sri Lanka, wildlife and culture video


This is a (wordless) video from a Dutch travel organisation about Sri Lanka. Including architecture; religious festivals; Asian elephants, deer, storks and a cattle egret in national parks.

New Sri Lankan frog discovery


This video is about a species, related to the just discovered Sri Lankan species:

Polypedates leucomystax – “Quack!” calls.

Singapore, 3rd February 2012 (night).

From Zootaxa:

Abstract

A new species of frog tentatively assigned to the genus Polypedates is described from the Gilimale forest reserve of the Sabaragamuwa province of Sri Lanka.

This tree frog is characterized by unique osteological characteristics in the skull which distinguish it from all other congeners, such as the presence of a series of maxillary teeth progressively changing orientation from horizontal to vertical from posterior end to anterior; a laterally-curved spine in the quadratojugal bone; and bony co-ossification on the skull resulting in four dorsal spines which are externally seen as protrusions in the parietal area. Bioacoustic observations of Polypedates ranwellai sp. nov. revealed three distinct call types.

High rates of deforestation and anthropogenic activities at the type locality threaten the survival of the species.