Top 10 Amfibia yg mungkin sudah pupus [Katak Borneo ditemui]

dauswq · Post time 19-7-2011 11:49 PM

Post Last Edit by dauswq at 19-7-2011 23:50

This photo, taken June 13, 2011 and released by Institute of Biodiversity and Environmental Conservation, shows an adult female Bornean Rainbow Toad, also referred to as Sambas Stream Toad (Ansonia latidisca) in Penrissen, Sarawak, Malaysian Borneo. Scientists scouring the mountains of Borneo spotted the toads, which were last seen by European explorers in 1924, providing the world with the first photographs of the colorful, spindly-legged creature, a researcher said Thursday, July 14, 2011. (AP Photo/Institute of Biodiversity and Environmental Conservation, Indraneil Das) NO SALE, MANDATORY CREDIT, ONE TIME USE ONLY, NO ARCHIVES

Saintis di kawasan pergunungan Sarawak menjumpai spe-sies katak kodok kali terakhir dilihat pengkaji Eropah pada 1924, sekali gus memberi peluang kepada dunia untuk melihat gambar haiwan berwarna-warni itu.

Sejak beberapa tahun lalu, pertubuhan Pemuliharaan Antarabangsa menye-naraikan spesies katak kodok pelangi Borneo itu dalam senarai amfibia yang mungkin sudah pupus.

Namun, pencarian bulan lalu di hutan tebal di Sarawak membuahkan hasil apabila penyelidik menemui katak terbabit tinggal di atas pokok.

Penyelidik Universiti Malaysia Sarawak, Indraneil Das berkata, ia ditemui di kawasan hutan terpencil yang jarang diteroka sejak seabad lalu.

Sebelum ini, saintis hanya mempu-nyai lukisan ilustrasi katak itu berdasarkan gambaran penyelidik pada 1924.

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Scientists scouring the mountains of Borneo spotted a toad species last seen in 1924 by European explorers and provided the world with the first photographs of the colorful, spindly legged creature, a researcher said Thursday.

In recent years, the Washington-based Conservation International placed the Sambas stream toad, also known as the Bornean rainbow toad, on a world "Top 10 Most Wanted Lost Frogs" and voiced fears it might be extinct.
Researchers found three of the slender-limbed toads living on trees during a night search last month in a remote mountainous region of Malaysia's eastern Sarawak state in Borneo, said Indraneil Das, a conservation professor at the Sarawak Malaysia University who led the expedition.
Only illustrations of the toads previously existed. Das said his team first decided to seek the toad last August, but months of searching proved fruitless until they went higher up the Penrissen mountain range, which has rarely been explored in the past century.
"It is good to know that nature can surprise us when we are close to giving up hope, especially amidst our planet's escalating extinction crisis," Robin Moore, a specialist on amphibians at Conservation International, said in a statement announcing the discovery.
The toads found on three separate trees measured up to 2 inches (5.1 centimeters) in size and comprised an adult male, an adult female and a juvenile, the statement said.
Das declined to reveal the exact site of his team's discovery because of fears of illegal poaching due to strong demand for bright-hued amphibians. Researchers will continue work to find out more about the Borneo Rainbow Toad and other amphibians in Penrissen.Conservationists say many endangered animals in Borneo are threatened by hunting and habitat loss sparked by logging, plantations and other human development.

dauswq · Post time 19-7-2011 11:51 PM

10

Golden toad (Incilius periglenes), Costa Rica
The Golden toad was last seen in 1989 and is perhaps the most famous of the lost amphibians. The species went from abundant to extinct in a little over a year in the late 1980s.
Golden toads were originally discovered in 1966 in western Costa Rica's Monteverde Cloud Forest, where populations of other amphibian species have also collapsed, a development thought to be linked to climate change and disease.

dauswq · Post time 19-7-2011 11:52 PM

9

Credit: Mike Taylor/Conservation International

Gastric brooding frog (Rheobatrachus silus), Australia
Gastric brooding frogs come in two species: Rheobatrachus vitellinus and R. silus (pictured above and last seen in 1985).
These frogs had a unique mode of reproduction: Females swallowed eggs, raised tadpoles in their stomaches and gave birth to froglets through the mouth.
The reason for the frogs' decline is unknown. Timber harvesting and the chytrid fungus are the main suspects.

dauswq · Post time 19-7-2011 11:53 PM

8

Credit: Paula Andrea Romero Ardila/ Conservation Internationsl

Mesopotamia Beaked Toad (Rhinella rostrata), Colombia
This frog with a distinctive pyramid-shaped head was last seen in 1914.

dauswq · Post time 19-7-2011 11:54 PM

7

Credit: Dave Wake/Conservation International

Jackson’s climbing salamander (Bolitoglossa jacksoni), Guatemala
This black and yellow salamander — one of only two known specimens is believed to have been stolen from a California laboratory in the mid 1970s — was last seen in 1975.

dauswq · Post time 19-7-2011 11:54 PM

6

Mug Shots: 10 Lost Amphibians Aug 12, 2010 9:00 AM ET
By Brett Israel, OurAmazingPlanet Staff Writer

Intro
10 9 8 7 6 5 4 3 2 1

African Painted Frog (Callixalus pictus), Democratic Republic of Congo/Rwanda
Very little is known about this animal which is never thought to have been photographed. It resides in high-altitude forests, especially bamboo forest, but the frog hasn't been recorded since 1950, possibly due to a lack of field work in the area

dauswq · Post time 19-7-2011 11:55 PM

5

Rio Pescado Stubfoot Toad (Atelopus balios), Ecuador
Last seen in April 1995 and may well have been wiped-out by chytridiomycosis.

dauswq · Post time 19-7-2011 11:55 PM

4

Turkestanian salamander (Hynobius turkestanicus), Kyrgyzstan, Tajikistan or Uzbekistan
Last seen in 1909 and known from only two specimens collected that year. All the collected specimens have since been lost and no other records are known.

dauswq · Post time 19-7-2011 11:56 PM

3

Scarlet frog (Atelopus sorianoi), Venezuela
The Scarlet frog was last seen in 1990 and is known only from a single stream in an isolated cloud forest.

dauswq · Post time 19-7-2011 11:58 PM

2

Credit: Heinrich Mendelssohn/Conservation International

Hula painted frog (Discoglossus nigriventer), Israel
The Hula painted frog was last seen in 1955 when a single adult was collected. Efforts to drain marshlands in Syria to eradicate malaria may have been responsible for the disappearance of this species.

dauswq · Post time 19-7-2011 11:59 PM

Credit: Fieldiana Zoology/Conservation International

Sambas Stream Toad (Ansonia latidisca), Borneo (Indonesia and Malaysia)
Last seen in the 1950s, increased sedimentation in streams after logging may have contributed to this toad's decline.