Eggs, Eggs, Eggs

Kakapo (Strigops habroptila), Critically Endangered

According to Radio New Zealand, this year could be a lucky one. With a population of less than 100, the critically endangered Kakapo has been slowly increasing due to dedicated conservation efforts. This breeding season, the Kakapo Recovery Programme is hoping for forty chicks.

Previously on this blog, the importance of rimu fruit to Kakapo breeding was discussed, and it appears that a bumper crop may be in the works. Additionally, there are more fertile adult females, than there have been in years. If these factors come together, the Kakapo population could increase by nearly 50 percent. With so many chicks, some would be raised by their parents, instead of hand-reared by humans, as they sometimes are when chicks are rare.

The breeding season has started less than a month ago, with the first mating of the season occurring on Christmas night. Chicks are expected in late February.

Keep up to date by following the Kakapo Ranger Diaries.

Donate, Volunteer, or Get Involved.

Baby Goliaths Can't Hide

Goliath Grouper (Epinephelus itajara), Critically Endangered

The Critically Endangered Goliath Grouper is the largest grouper in the Atlantic, growing more than 2 meters (6 feet) long, weighing more than 450 kg (1000 lbs), and living up to 40 years. Recently, the Ocean Research & Conservation Association (ORCA) used an underwater acoustic camera system (similar to the sonar dolphins or bats use) to visualize baby Goliaths among the murky waters of mangrove roots. Baby Goliaths, up to 1 meter long, spend the first 5-6 years of their lives, almost exclusively in and amongst the waters around mangroves.

Conservation action began in 1990 when the US placed a moratorium on fishing, and the Caribbean did the same in 1993. Though the population has increased it will take many years for numbers to recover to previous levels. Additionally, in some areas, fishing continues despite the bans. It is sometimes difficult to accurately assess the recovery of the species, in part because of the inability to visualize Baby Goliath numbers in murky and cloudy waters. The new camera system used by ORCA should alleviate this problem, and make surveys of Goliath populations easier.

Read an article here.

Donate to Ocean Futures, an Ocean Conservation that has worked to conserve the Goliath Grouper in the past.

More Monkeys Is Good News

Gray Snub-nosed Monkey (Rhinopithecus brelichi), Endangered

This endangered monkey is confined to a 400 square kilometer reserve in China. Up until 1978, their mountainous home was severely disturbed and damaged due to mining activities. Since then, the Fanjing Mountains Natural Reserve has been established, and their population has increased from an estimated 400 in 1979 to 850 today.

Since 1992 the Fanjingshan National Nature Reserve Administration Bureau has successfully bred seven captured individuals, producing a mere 16 offspring-an average of one per year.

You can donate to Save the Primates to aid conservation of primates world-wide.

No More Protein!

Kakapo (Strigops habroptila), Critically Endangered

The Kakapo is a large ground-dwelling parrot, found only on two small, isolate islands in New Zealand. The total number of birds has risen to 91 in the past year, but this number is still precariously low.

Part of the problem is that Kakapo only lay eggs every three to five years, when Rimu Trees produce an especially large harvest of fruit. When this happens, the Kakapo feast and breed. Scientists have been trying to increase the frequency with which these beautiful birds breed, by supplementing their diets with protein, known to be an important nutrient for other breeding species.

Now, the importance of protein for the Kakapo is being questioned. Professor David Raubenheimer has recently analyzed the nutrient content of the Rimu fruit, and found that it is low in protein and high in calcium. He thinks that calcium may be more important for breeding Kakapo, as it would be used in their eggshells and incorporated into their unusually large skeletons.

Scientists will continue to try and increase the breeding frequency of the Kakapo to boost the population, by using a new formulation of feed that more closely matches the content of the Rimu fruit. One question still remains, however. Is it just the nutrients that are limiting the Kakapo, or are they programmed to breed only when there is an abundance of Rimu fruit?

If you want to help save the Kakapo, you can donate or just become more informed.

733

Whooping Crane (Grus americana), endangered

Operation Migration, a program which is reintroducing whooping cranes to the Eastern United States, has reason to celebrate.

Each year, 20 or so captive born endangered whooping cranes, are taken on a journey guided by an ultralight aircraft. Young whooping cranes learn their migration routes from their parents, and being captive born, must learn the migration route from their breeders.

This year, during the journey between Wisconsin and Florida (see the route), a crane dubbed 733, dropped out of the flight during a difficult stretch of the trip. Crane watchers everywhere held their breath, hoping that 733 might have survived and be found. And a few days ago, they all breathed sighs of relief, as 733 was found in Kentucky, and will soon continue the journey to its winter home.

Get involved.

Breeding Rails

Guam Rail (Gallirallus owstoni), Extinct in the Wild

Guam is a tiny island territory, comprising a mere 541 square kilometers, or a little more than half the size of New York City. Until the 1980s, this little island paradise was home to the Guam Rail, which existed only on this tiny patch of land. In 1980 The Guam Rail disappeared from its natural home.

What happened? It all goes back to World War II, when foreign ships accidentally imported the Brown Tree Snake. The ground-dwelling Guam Rails had never had to deal with predators such as snakes before, and were completely defenseless. The snakes decimated not only the Rails, but also 9 other native species, 5 of which were found nowhere else in the world.

The Guam Rail is not extinct yet, however, as it is still held in captivity in Guam and American zoos, and has been bred successfully. Although reintroduction efforts are underway on the nearby island of Rota, their success is far from guaranteed, as the Brown Tree Snake persists and continues to threaten introduced birds. Researchers have had some success in keeping snakes out of small controlled areas, but as long as the snakes pose a threat, this species will require monitoring and management.

Recently, the National Aviary in Pittsburgh, one of the few zoos working to breed the birds, shipped off another year-and-a-half old Rail to join its struggling fellows back in the wild. Godspeed and goodluck!

More good news for the frogs

Spotted Tree Frog (Litoria spenceri)

In Kosciuszko National Park, Australia, a captive breeding program has been successful beyond scientists expectations. The Spotted Tree Frog population crashed in 1998, which scientists believe was caused by the chytrid fungus outbreak mentioned in a previous post. Nearly 20% of the frogs released last year, have survived, suprising scientists who said "we'd have been very happy with 5% survivorship."

Captive breeding and release programs have been tried many times before with limited success. The reason for the success of this particular program is not well understood, but scientists hope that captive breeding and reintroduction may be a means to save many frogs from extinction in the near future.

Striped Hyena Spotted

Striped Hyaena (Hyaena hyaena)

According to a WWF news release, a Striped Hyena was spotted in northern Turkmenistan recently, by WWF scientists working on the Amu Darya nature reserve. Although not listed as endangered by the IUCN, this species is very rare in Central Asia. The fact that it has been spotted here may indicate that the region's environment is recovering.

Abundant in the Hudson

Shortnose Sturgeon (Acipenser brevirostrum)

Here's something you don't hear about everyday. The shortnose sturgeon, listed as vulnerable on the IUCN's Redlist, appears to be recovering, at least in certain rivers in North America. Although the article cites a 400% increase in the Hudson River since the 70s, it makes no mention of other rivers where this species is also threatened.

Here's the article.
Images of Shortnose Sturgeon.