Posts Tagged ‘Tiger’

Year of the Tiger: Extinct Subspecies

Posted by Peter in Featured

Part 7 of our Tiger profile

Three Extinct Subspecies – yes, large mammals which have disappeared forever in the last 50 years.

Bali Tiger Panthera tigris balica, Javan Tiger Panthera tigris sondaica and the Caspian Tiger Panthera tigris virgata.

The Bali Tiger was the first Tiger to be lost in the last half-century, disappearing in the 1940′s. As one could imagine, tigers living on a small island, such as Bali, inhabitated by humans leads to direct conflict and for the most part tigers were considered pests and hunted to extinction. Before we go pointing fingers – North Americans did their best to rid ourselves of wilves, mountain lions and other predators in the late 1800′s and through the 1900′s. Humans clearly have a propensity not to want to share our land with an animal that can eat us – even if the Bali Tiger was reprotedly the smallest of all tigers, it was a tiger and could eat your livestock nonetheless.

The Caspian Tiger was the next to go in the 1970′s. Unlike the isolated isalnd species, the Caspian was found across Turkey and Iran (south and west of of the Caspian Sea) and west through Central Asia into the Takla Makan desert of Xinjiang, China. Hunting, habitat loss and conversion to agriculture were the leading factors in the loss of this tiger. Save the Tiger Fund notes tigers in Central Asia were not usually regarded as a threat to human life and were known to co-exist with human habitation, even close to major towns such as Tashkent. But the spread of settlement, especially Russian immigration into Central Asia from the late nineteenth century, was to lead to their demise. As the riverside vegetation was cleared for cultivation, and rivers tapped for irrigation water, notably for the great expansion in cotton growing from the 1930s, tigers lost their habitat and prey. In Russian Central Asia in the early decades of the twentieth century military detachments were used to exterminate the tigers, as well as leopards and wolves, ahead of human settlement. Herdsmen regarded tigers as a threat to their livestock, including camels, horses and sheep. As their fine pelts were valuable they were killed by strychnine poison and steel traps, and large bounties were paid for their destruction.

The Javan Tiger was the latest to go, in the late 70′s-1980′s. A tiger went extinct in the 1980′s – ~25 years ago, large mammal extinction should not occur in this day and age, yet they do, and will continue to do so. Another island species which was both hunted and lst it’s prey base due to loss of habitat. Hopefully we have learned our lessons with island species and can protect the remaining Sumatran Tigers left on that island before there populations drops below one which is genetically viable.

 

Year of the Tiger: South China Tiger

Posted by Peter in Endangered Species

Part 6 of our Tiger profiles:

South China Tiger Panthera tigris amoyensis

This one is a mess, plain and simple.

Once found in central and eastern China, and numbering close to 4,000 individuals as late as the 1950′s, the government listed the species as a pest and its persecution began. Now, it is believed no more than 20-30 individuals remain although no official or biologist has observed a wild South China Tiger since the 1970′s. The IUCN lists this species as Critically Endangered (Possibly Extinct in the Wild). Regardless, even at 20 individuals, no wild viable population can remain.

Link to http://www.iucnredlist.org/apps/redlist/details/15965/0 and Save the Tiger Fund for more on what could be the latest Tiger to be heading for extinction.

Check back on 3/29 as we profile the 3 subspecies of Tigers which have gone extinct since the 1940′s…

Year of the Tiger: Bengal Tiger

Posted by Peter in Endangered Species

Part 5 of our Tiger species profiles

Bengal Tiger Panthera tigris tigris

Of all the living tiger subspecies, the Bengal Tiger’s population currently is the highest yet low enough to be considered Endangered. With a population of around 2,500individuals, the Bengal Tiger faces habitat loss and fragmentation as well as poaching and human-wildlife conflict issues.

The Bengal Tiger ranges in size from 300-450 pounds and is possibly the most well known to the public through zoos and media documentary’s. We have been saying all week that each of these subspeces are Endangered, if this is the largest population of all the tigers, you can understand why they are in such trouble.

Population status may include:

  • Bangladesh 362
  • Bhutan 67-81 (adults)
  • China 30-35
  • India 2500-3750
  • Western Myanmar 124-231
  • Nepal 93-97 (adults)

Year of the Tiger: Indochinese Tiger

Posted by Peter in Endangered Species,Featured

Part 4 of our Tiger species profiles

Indochinese Tiger Panthera tigris corbetti

Endangered, this species is distributed across Vietnam, Thailand, Myanmar, Southern China, Cambodia and Laos with a population of appriximately 700+ individuals although no single population holds more than 250 individuals.

Males of this species can reach up to 400lbs with females frequently around 250lbs. The IUCN Redlist notes that based on genetic analysis, Luo et al. (2004) identified P. t. corbetti as the likely ancestral tiger population, with the radiation into other subspecies taking place 72,000-108,000 years ago. This makes this species the mother (and father) of all Tiger subspecies.

According to the Save the Tiger Fund website, the population distribution is believed to be:

  • Cambodia – 150-300
  • China – 30-40
  • Laos – Present
  • Eastern Myanmar – 106-234
  • Thailand – 250-501
  • Vietnam – 200

Maps and information at: http://www.iucnredlist.org/apps/redlist/details/136853/0

Year of the Tiger: Malayan Tiger

Posted by Peter in Endangered Species

Part 3 of our Tiger species profile

Malayan Tiger Panthera tigris jacksoni

Malayan Tiger, Zoo Melaka, Malaysia

Malayan Tiger, Zoo Melaka, Malaysia

Recently discovered in 2004…ok, not discovered as they knew it was there, but re-classified as a distinct subspecies in 2004, this population is found only in the Malay Peninsula which includes the southern tip of Thailand and Peninsular Malaysia. Although the population is beleived to be around 500-600 individuals, this species is also on the decline and is considered Endangered.

The Houston Zoo currently houses two Malayan Tigers which can be seen across from the African Lions.

For an update on Malaysian Tiger conservation, check out the Malaysian Conservation Alliance for Tigers (MYCAT) or their Facebook page

For maps and detailed information: http://www.iucnredlist.org/apps/redlist/details/136893/0

Year of the Tiger: Sumatran Tigers

Posted by Peter in Endangered Species

Part 2 of our Tiger species profile

Sumatran Tiger Panthera tigris sumatrae

This species is found only on the Indonesian island of Sumatra and is the smallest of the tiger species at 200-250 pounds. Population estimates of approximately 400-500  individuals, this species is considered Critically Endangered. Although poaching is a concern as with all the tiger species, the Sumatran Tiger suffers from high rates habitat loss and fragmentation due to logging and palm oil plantation development. This species also suffers from a high rate of human-wildlife conflict on the island.

For more on this species, go to: http://www.iucnredlist.org/apps/redlist/details/15966/0

Year of the Tiger: Siberian (Amur)Tigers

Posted by Peter in Endangered Species,Featured

We thought we would catch you up on the 6 living Tiger species over the next week so check back daily for a new Tiger Blog.

Siberian (Amur) Tiger, Panthera tigris altaica

Also known today as Amur Tigers, this species can be found in the Southeast corner of Russia in the Sikhote-Alin mountain range east of the Amur River. Their former range included northeastern China and the Korean Peninsula, and as far west as Mongolia. Amurs are the largest living species of Tiger weighing in between 500 and 600+ lbs.

Critically Endangered, this is a population in decline: It is believed that only 320-400 Amur Tigers exist today in the wild, mostly in Russia with perhaps 10-20 in China. There are close to 450 Amur Tigers in accreditated zoos today including North America’s Association of Zoos and Aquariums (AZA) and the European Association of Zoos and Aquariua (EAZA)

In the early 1900′s, this population had dropped below 50 individuals as hunting (for sport as well as due to human-wildlife confilct) took a toll on this population until the 1940′s when the Soviet Union banned hunting of the species. Poaching still continues to this day due as Tiger’s are marketed for purported medicinal purposes.

For a more detailed account on this species:

1) http://www.iucnredlist.org/apps/redlist/details/15956/0

2) http://www.savethetigerfund.org

The Last One

Posted by Peter in Endangered Species,Featured,Texas

 

Malayan Tiger: There may be less than 600 individuals remaining in the wild

Malayan Tiger: There may be less than 600 individuals remaining in the wild

The Houston Zoo’s Conservation Department is involved in a number of efforts internationally as well as here in Texas. It had dawned on me that some of the species we focus on in the wild, may disappear completely in my lifetime and how disappointing a thought that may be. A shame really given the number of species in trouble so few people have ever heard of here at home that are declining faster than we can get a handle on. Houston Toad, Attwater’s Prairie Chicken, the Ocelot subspecies in Texas, Elliot’s Shrew, Black Lace Cactus, Texas Blind Cave Salamander;  these names mean little to most people but we may just lose them, one species at a time.

The January 2009 National Geographic Magazine had an article called Last One. A piece about species whose numbers are so low, someday very soon, an individual will be the Last One and the first photo in the spread is an Ocelot of which less than 100 individuals of the Texas subspecies are left. There are no other Ocelots in North America; the Texas population is the Last One.

Wildlife and plants in Texas are not the only ones in trouble. Across North America, small relatively innocuous species of animals and plants are slipping away. Columbia Basin Pygmy Rabbit – went extinct in the wild in October 2008; Vancouver Island Marmot is Canada’s most endangered mammal – less than 100 individuals; Peninsular Pronghorn, Baja, Mexico – less than 250 individuals; Whooping Cranes, California Condors, Louisiana Pine Snakes – all at critically low numbers

Internationally, the numbers are staggering, even considering how familiar we may be with certain species. The common domestic pet chinchilla can be found in people’s homes across the world; in their native Chile and Argentina – less than 3,000 survive. The Bactrian Camel you may see on a TV wildlife special; less than 800 survive in China and Mongolia; Tigers, Rhinos, Asian Elephants – losing ground fast. Leopards are an animal we have all heard of – the Amur Leopard of Russia’s Far East – 30 individuals left in the wild. Just 30!

Does it really matter if a species goes extinct? Every piece lost somehow affects their habitat and ecosystem, so, yes; it does, even for the animals we have never even heard of. Losing species simply means a breakdown in that ecosystem – a breakdown in the food chain. Thomas Jefferson once wrote “for if one link in nature’s chain might be lost, another might be lost, until the whole of things will vanish by piecemeal”. That quote is over 200 years old and today plants and animals are beginning to vanish in unprecedented numbers.

 

So what do we do? It is time to put the effort into keeping the common species common and developing programs to keep those species in decline, from becoming the Last One.