Showing posts with label captive breeding. Show all posts
Showing posts with label captive breeding. Show all posts

Thursday, 12 March 2020

Critically endangered snapping turtle program breeds hope for survival


Wed 11 Mar 2020 06.33 GMT

Ninety per cent of Bellinger River snapping turtle adult population was wiped out but Australia’s Taronga Zoo is breeding numbers back up

The Bellinger River snapping turtle is one of the rarest turtles on the planet after a virus wiped out more than 90% of the adult population in 2015, but a captive breeding program is bringing hope that a healthy population can be restored in the wild.

Thirty-five turtles have hatched at the special breeding facility at Taronga Zoo since the beginning of this year.

The turtles are being housed in a nursery facility where they are fed and keepers monitor their health and growth.

“We release as many back into the wild as possible but some will stay in the breeding program,” said Adam Skidmore, Taronga Zoo’s senior reptile keeper.

“In the river there are still some smaller ones growing up but they don’t start breeding until the age of 11 or 12, so, until that happens, we breed here so we can supplement the population.

“Hopefully one day they can self-sustain. That’s the goal.”

Wednesday, 26 June 2019

Monarch butterflies bred in captivity may lose the ability to migrate, study finds


JUNE 24, 2019
Monarch butterflies purchased from a commercial breeder did not fly in a southward direction, even in offspring raised outdoors, in a new study conducted by scientists at the University of Chicago. Wild-caught monarchs bred indoors under simulated outdoor conditions also did not orient south, suggesting that captive breeding disrupts the monarch's famous annual migratory behavior.
The National Wildlife Federation estimates that the North American monarch population has declined 90% over the last two decades. As the number of butterflies that reaches their winter habitats in California and Mexico dwindles, monarch enthusiasts have turned to a variety of conservation efforts, including captive breeding and release of the butterflies throughout the summer and autumn. However, the new study, published this week in the Proceedings of the National Academy of Sciences, shows that these well-intentioned practices may not have the desired effect.

Thursday, 30 May 2019

Colombian breeds rare frogs to undermine animal traffickers - via Herp Digest



By Manuel Rueda and Cesar Garcia, AP 5/24/19

CUNDINAMARCA, COLOMBIA
In a small farmhouse surrounded by cloud forest, Iván Lozano inspects dozens of glass containers that hold some of the world's most coveted frogs.

The conservationist has been fighting the illegal trade in rare tropical frogs for years, risking his life and his checkbook to save the brightly colored, poisonous amphibians whose population in the wild is dwindling
.
But Lozano doesn't hunt down poachers and smugglers. He's trying to undermine them by breeding exotic frogs legally and selling them at lower prices than specimens plucked by traffickers from Colombia's jungles. His frog-breeding center Tesoros de Colombia, which translates to Treasures of Colombia, is among a handful of conservation programs around the world that are trying to curtail the trafficking of wild animals by providing enthusiasts with a more eco-friendly alternative: specimens bred in captivity.

"We can't control the fact that in some countries it is legal to own these animals," Lozano said. "But we want to make sure that collectors buy animals that are raised in captivity and are legally exported."

Lozano's efforts to replace illegally captured poison dart frogs have made him well known among collectors in the United States, who are increasingly seeking legally traded specimens.

"Before there was no way you could get a histrionica legally," said Julio Rodríguez, an experienced New York City collector, referring to the Harlequin Poison Frog by its scientific name. "If you saw one in a collection, it most likely came from the black market.”

Rodríguez said that since Tesoros de Colombia began exporting frogs to the United States six years ago prices for some coveted species have dropped significantly. The price tag on the Harlequin Frog dropped by 50 percent, he said. 

The Golden Dart Frog, another much-sought species, went from around $150 a few years ago to $30.

"We want prices to go down so much that it's no longer profitable for traffickers to sell these frogs," Lozano explained.
He said his company also helps collectors breed their own frogs, so they can flood the market with legally raised specimens, taking pressure off those living in the wild. The frogs raised in captivity by Lozano are no longer poisonous, because they have a different diet than wild specimens. But collectors still seek them for their brilliant color patterns.

"We make ourselves sustainable by moving on to new species," said Lozano, who already has permits to export seven species, including the Red Lehmanni, a frog so rare collectors refer to it as "the Holy Grail." Lozano is currently seeking permission from Colombia's government to export another 13 species that are under pressure from animal traffickers.

But while some breeding efforts have helped to tackle the illegal trade, others have had unintended consequences.
Indonesia allows the export of 3 million captive-bred Tokay Geckos to global pet markets each year. But weak regulation has given corrupt companies the opportunity to sell off wild Geckos as Geckos bred in captivity, said Chris Shepherd a conservationist who worked in South East Asia for two decades with TRAFFIC, an environmental group.

Laura Tensen, a zoologist at the University of Johannesburg, said in South Africa, private game reserves that breed lions for hunting have created a new market for lion bones. South Africa now exports lion skeletons to Asia, where they are used for traditional medicine, and this has given poachers in remote regions an additional incentive to go after wild lions.
"For some species captive breeding might help" to reduce trafficking, Tensen said. "But one market does not always replace the other.”

In a 2016 study, Tensen concluded that captive breeding programs are more likely to work when animals bred in captivity are just as desirable to customers as those taken from the wild. These programs are also more successful with species that are relatively cheap to breed and in countries where authorities are arresting traffickers.

"In countries where the risks of being caught are low, the prices for wild caught animals are always less than those of captive bred animals," Shepherd said.

Lozano assigns ID numbers to his frogs, to make it harder for traffickers to sell wild frogs as frogs bred in captivity. But he has struggled to keep prices low because of the costs associated with securing export permits from the Colombian government.

It took Lozano three years to secure his first export permit, exasperating two business partners, who eventually gave up on the venture. Lozano continued on his own and acquired a debt of hundreds of thousands of dollars to keep the breeding center afloat.

He has also battled online critics who have tried to undermine his business by spreading rumors on social media that he is illegally exporting frogs. Lozano believes the criticism comes from animal traffickers.

"For our own safety, we try not to disclose details of our location," he said.

Lozano now wants to start a program to repopulate some forests with frogs bred in his lab.

Colombia is home to 734 frog species, more than any other country except Brazil. The Humboldt Institute, an environmental research group, says at least 160 amphibian species in Colombia are critically endangered.

"This is an urgent situation," Lozano said. "If we don't persist some frogs could become extinct.”

Sunday, 16 September 2018


Success for Cambridge conservation charity battling to save one of world’s rarest reptiles (Siamese crocodile) – via Herp Digest
September 6, 2018, Cambridge Independent, by Paul Brackley
It is one of the rarest reptiles in the world – and has disappeared from 99 per cent of its original range.

But now, with help from Cambridge-based conservation charity Fauna & Flora International (FFI), there is renewed hope for the Siamese crocodile.

Three clutches of eggs, cared for at a captive-breeding facility in Cambodia, have yielded 65 hatchlings.

With estimates putting the wild population at a mere 250 mature individuals, this represents a momentous moment for the species, which is listed as critically endangered on the IUCN Red List.

The species was widely believed to be extinct in the wild until its rediscovery during surveys in the remote Cardamom Mountains, led by FFI.

A Siamese crocodile. They grow to one metre in three years. Picture: Jeremy Holden/Fauna & Flora International

This area of Cambodia is home to the majority of the global population and yet even here, in its main stronghold, there has been very little breeding activity in the wild, partly because the population is so small and fragmented.

Surveys have recorded one or two nests at year, at most – and the one discovered by Wildlife Conservation Society (WCS) staff last year was, worryingly, the first since 2013.

But there is hope. In addition to the success at the captive-breeding facility in Phnom Penh, managed by FFI in partnership with the Cambodian Forestry Administration, this year has been the best for years for wild nests.

Five have been discovered – four of which were downstream from one of the sites where FFI released 38 pure-bred crocodiles as part of a national reintroduction programme launched in 2012. Prior to the single one found here by WCS in 2017, the last time any wild nests were found in this river system was 2004.

Dr Jackson Frechette, flagship species programme manager at FFI, which is based in the David Attenborough Building in Cambridge, said: “This is the culmination of 18 years of hard work by FFI and our partners to protect and restore Siamese crocodiles in this part of Cambodia.
A Siamese crocling. Picture: Jeremy Holden/Fauna & Flora International

“We’ve really built on that solid foundation and it feels as though we’ve turned a corner in our efforts to bring this species back from the brink. It’s a perfect illustration of the fact that species recovery – more often than not – depends on long-term investment and vision on the part of conservationists, communities and donors alike.”

The first individual to hatch from the captive-breeding programme that FFI launched came from a clutch in 2012. It was released into the wild in 2015. Another clutch in 2016 produced seven hatchlings.

With financial and technical support from donors and collaborators – particularly Lonnie McCaskill of WCS – the facilities and husbandry have been significantly improved, leading to this year’s spectacular success. 

Every crocodile hatched from two of the three clutches of eggs looked after this year, and 90 per cent of the third clutch also hatched.

All 65 of the baby crocodiles will be reared in captivity for up to three years, until they are a metre long. They will be large enough to fend for themselves and will be released into strictly protected community crocodile sanctuaries.
Siamese crocodiles have disappeared from 99 per cent of their range. Picture: Jeremy Holden/Fauna & Flora International

The Cambodian Forestry Administration opened the Phnom Tamao Zoological Park and Wildlife Rescue Centre in 1995. Supported by the Wildlife Alliance, Free the Bears and FFI, it is a rehabilitation centre for around 90 species rescued from the illegal wildlife trade. The Siamese crocodile is among many species for which there are breeding and release programmes at the site, which doubles as a zoo, with animals that cannot be released given a home in a natural forest setting.

The Siamese crocodile’s decline began with competition from rice farmers for its wetland habitat.

However, it was the explosion in commercial hunting and large-scale farming in the 1950s to supply the international skin trade that drove the species to the brink of extinction.

Siamese crocodiles are targets for the trade because they produce fine, soft leather and are easy to breed in captivity.

There are thought to be about one million in captivity, but these are actually hybrids and mongrels.

Almost all individuals caught in the wild have subsequently been hybridised with other crocodile species. FFI warns that this compromises the genetic purity of the vast majority of captive stock, as well as severely depleting the wild population.

Friday, 24 November 2017

Chester Zoo successfully breeds rare Catalan newt


Twelve Montseny newts – one of world’s rarest amphibians - hatched as part of joint breeding project with Catalan authorities

Stacee Smith
Friday 17 November 2017 15.06 GMTLast modified on Friday 17 November 2017 15.50 GMT

Conservationists at Chester Zoo have successfully bred one of the world’s rarest amphibians – the Catalan newt – in an attempt to save it from extinction.

The zoo is the first organisation outside Catalonia to become involved in the breeding project for the newt, the rarest amphibian in Europe.

The critically endangered species, also known as the wild Montseny newt, is from the Montseny mountain range in north-eastern Catalonia, about 60 miles (100km) north of Barcelona.

The recovery plan is a joint effort between Chester Zoo, the Barcelona provincial council, the Catalan government and Barcelona Zoo.

As part of the plan, 12 Montseny newts have hatched at Chester Zoo, where a team of experts are working to ensure their continued survival before they are released into the wild.

Experts at Chester have created a purpose-built breeding facility for the newts, away from all other amphibians housed at the zoo to ensure their bio-security.

In parallel with the breeding programme, conservation efforts are also being made to improve the newts’ natural habitat in preparation for their reintroduction – including improving the water quality and ecological flow of the streams they live in.


Monday, 31 July 2017

Baby western swamp tortoises set for release into wild (Australia) – via Herp Digest


By Loukas Fountain, ABC.net.au/news, 7/10/17 

Three of Australia's rarest reptiles have been given a health check as they prepare to move from captivity into the wild.

Adelaide Zoo is one of just two zoos worldwide to house and breed the western swamp tortoise.

The zoo is celebrating a successful breeding season, which saw four baby tortoises hatching, each the size of a coin.

Native to Western Australia, in the mid-1980s it was estimated there were fewer than 50 tortoises left in the wild.

They now only live in the wild in two small habitats in the Swan Valley, north-east of Perth.

Zoos SA received its first western swamp tortoises as part of an agreement with Perth Zoo in 2003, but breeding did not start for several years due to issues with incubation.

Since 2012, Zoos SA has successfully bred and raised 16 of the reptiles, with nine already making the journey back to WA to be released into the wild.
The reptile was thought to have been extinct for more than 100 years until a random discovery in 1953.

"It really was a chance discovery. A kid took one into a country fair, it was identified as a swamp tortoise and things have progressed from there," Zoos SA reptile keeper John Della said.

Perth Zoo has since bred more than 800 of the tortoises and released 600 into four separate nature reserves.
Adelaide Zoo has eight adult breeding tortoises, all from Perth Zoo, and three were born last year.

Those three are being prepared to move back to Perth in September, but were woken from a six month hibernation period on Monday to be cleaned, weighed and returned to a pond to gain weight ahead of their move.

"Most tortoises would hibernate over winter in the cooler months," Mr Della said.
"These guys need to aestivate over summer because that's when their ponds dry out and they've got no water, so they'll find some nice leaf litter to bury themselves in and basically sleep there until the rains come.

"Then they go back to their ponds, their food sources come back and they can start breeding.”

It takes about three years for keepers to determine the gender of each tortoise and the reptiles will not breed until they are aged about seven.

Later this month, Perth Zoo will send another breeding pair to Adelaide to be housed at Monarto Zoo, near Murray Bridge.


Sunday, 4 June 2017

Smithsonian Scientists Release 90 Limosa Harlequin Frogs (Atelopus limosus) Wearing Mini Radio Transmitters Into Panamanian Wilderness - via Herp Digest




First Release Trial To Help Pave the Way for Reintroduction Programs for Critically Endangered Frogs

Press Release, Smithsonian's National Zoo & Conservation Biology Institute, 6/1/17       

For background videos and photos go to 
           
Ninety Limosa harlequin frogs (Atelopus limosus) bred in human care are braving the elements of the wild after Smithsonian scientists sent them out into the Panamanian rainforest as part of their first-ever release trial in May. The study, led by the Panama Amphibian Rescue and Conservation Project, aims to determine the factors that influence not only whether frogs survive the transition from human care to the wild, but whether they persist and go on to breed.

“Only by understanding the trials and tribulations of a frog’s transition from human care to the wild will we have the information we need to someday develop and implement successful reintroduction programs,” said Brian Gratwicke, international program coordinator for the rescue project and Smithsonian Conservation Biology Institute (SCBI) amphibian conservation biologist. “Although we are not sure whether any of these individual frogs will make it out there, this release trial will give us the knowledge we need to tip the balance in favor of the frogs.”

The Limosa harlequin frogs, which were released at the Mamoní Valley Preserve, have small numbered tags inserted under their skin so researchers can tell individuals apart. The scientific team also gave each frog an elastomer toe marking that glows under UV light to easily tell this cohort of frogs apart from any future releases. Smithsonian-Mason School of Conservation doctoral student Blake Klocke is currently monitoring the frogs daily at the site, collecting information about survivorship, dispersal, behavior and whether the warm micro-climate in the area provides any protection against disease.

The study is also looking at whether a “soft release” boosts the frogs’ ability to survive. Thirty of the newly released frogs spent a month at the site in cages, acclimating to their surroundings and foraging on leaf-litter invertebrates. Eight of these frogs, and eight that were released without the trial period, are wearing miniature radio transmitters that will give Klocke and the team a chance to look at differences in survival and persistence between the two groups. The researchers also collected skin-bacteria samples from the soft-release frogs to measure changes during their transition from captivity to the wild.

“The soft release study allowed us to safely expose captive-bred frogs to a more balanced and varied diet, changing environmental conditions and diverse skin bacteria that can potentially increase their survival in nature,” said Angie Estrada, Ph.D. student at Virginia Tech and a member of the team leading the soft release, which was funded through a Smithsonian Tropical Research Institute (STRI) grant. “It allowed us to monitor health and overall body condition of the animals without the risk of losing the frogs right away to a hungry snake.”

Limosa harlequin frogs are especially sensitive to the amphibian chytrid fungus, which has pushed frog species to the brink of extinction primarily in Central America, Australia and the western United States. The Panama Amphibian Rescue and Conservation Project brought a number of individuals into the breeding center between 2008 and 2010 as chytrid swept through their habitat. The Limosa harlequin frogs in this release trial are the first captive-bred generation of the species and only part of the rescue project’s total insurance population for the species.

“After all the work involved in collecting founder individuals, learning to breed them, raising their tadpoles, producing all their food and keeping these frogs healthy, the release trial marks a new exciting stage in this project,” said Roberto Ibáñez, in-country director of the rescue project and STRI scientist. “These captive-bred frogs will now be exposed to their world, where predators and pathogens are ever-present in their environment. Their journey will help provide the key to saving not only their own species, but Panama’s other critically endangered amphibian species.”

Wednesday, 10 May 2017

Captive breeding is a final roll of the dice for the vaquita

9 May 2017

By Olive Heffernan

Yet another vaquita has turned up dead in recent weeks, making one less of the small, smiley-faced porpoise that is the world’s most endangered cetacean.

Estimated to number as few as 30 earlier this year, this endearing species has become a poster child for conservation – not least because its decline has been obvious for decades, yet all attempts to save it so far have failed.

In a last-ditch attempt to avoid extinction, scientists are now preparing to capture some of the remaining vaquitas and breed them in captivity. This high-risk move may appear extreme, but further losses are reinforcing the need for urgent action: another four have washed up dead so far this year, after getting entangled in fishing nets.

The continued toll seems astonishing given that the vaquita’s home in the upper Gulf of California, just off north-west Mexico, has been protected as a UNESCO biosphere reserve since 1993, when there were around 600 of the mammals left. Despite that, the area continues to be plundered by both legal and illegal fishing.

The biggest problem is poachers using gill nets, which are particularly dangerous for vaquitas. The poachers illegally fish in the reserve for totoaba, a large endangered species whose swim bladder is known as “aquatic cocaine” – fetching tens of thousands of dollars in China for its purported, though unproven, health benefits.

But Mexican officials have consistently ignored scientific advice to permanently prohibit all gill nets in the porpoise’s home waters. Instead, they have opted for short-term measures, such as a two-year emergency ban on their use that ends this month.

These efforts, along with the wider conservation campaign, backed by the likes of Miley Cyrus and Leonardo DiCaprio, have not nearly been enough.


Continued

Sunday, 6 November 2016

Critically-endangered Bellinger River snapping turtles show signs of breeding in captivity (Australia) – via Herp Digest




By Ruby Cornish, News, ABC
Oct 26, 2016,


The critically-endangered Bellinger River snapping turtle is showing early signs of breeding in captivity, according to keepers at Sydney's Taronga Zoo.

The turtles, which are found in a single body of water on the New South Wales mid north coast, were decimated last year when a mystery virus swept through the river's population, leaving the animals blind and starving.

It is estimated that 400 turtles died in the space of a month, and in April this year the species was listed as critically endangered by the NSW Scientific Committee.

Since then, an emergency response team of scientists has been investigating the event and developing a strategy to save the population.

As part of that effort, 16 turtles were placed in quarantine at Western Sydney University then transported to Taronga Zoo to help establish an 'insurance population’.

Senior Keeper Adam Skidmore, said the captive turtles were doing very well.

"We've just brought them through the winter period. Up until now they've been quite dormant, lying around and not doing too much," he said.

"But as the weather has warmed up they're starting to get more inquisitive and more alert, and taking an interest in each other.”

He said some turtles had been observed mating, but that did not necessarily mean a successful breeding season.

"Baby turtles would be a bonus, but we don't need it to happen now.
"We're not going to be disheartened. The turtles are just getting used to being in a captive situation.”

He said the team was hoping to see a steady breeding pattern develop over the next few years.

Mr Skidmore said it was hard to predict how long it would be until the turtle population along the Bellingen River returned to healthy numbers.

"First we need to breed them up. Then there's so many variables along the river that have to be addressed by all stakeholders," he said

Last month students from Bellingen High School and Chrysalis Steiner School made alarming findings when they carried out studies on the health of the Bellinger River.

Dissolved oxygen saturation readings ranged from 40 to 60 per cent, well below the Australian healthy river standard of 85 per cent or more.

Mr Skidmore said the information was helpful for determining when and where the turtles could be released in the future.

"It's great to have people out there collecting data in the environment that these animals are found in," he said.

"We hope for ideal conditions [when we release them], but it's a tough one.
"It's largely out of our hands.”

Taronga Veterinary Pathologist Karrie Rose said there  had not been any additional cases of the virus detected since the initial outbreak.

"The population in the river seems to be doing very well," she said.

She said ultimately hopes were high for the preservation and rehabilitation of the snapping turtle.

"There are a lot of positive conversation actions underway, and I think all of the signs are very good now, she said.

She said the source of the mystery virus remained unknown.

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