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Showing posts with label breed. Show all posts
Showing posts with label breed. Show all posts

Orange-Bellied Parrot About to Become Extinct

It's a tough time for the orange-bellie. This species of parrot is about to become extinct. It is estimated to have five years left to live. A few years ago there were 70 pairs. Now only 50 birds remain. The last species of bird to go extinct in Australia ceased its existence 70 years ago.

For the most part, people don't seem to care. However, there are more close to extinction. A fight ensues to keep the orange-bellie alive. In 1984 the Orange-Bellied Parrot (OBP) Recovery Team was created to monitor and protect the bird. A protected breeding program was established in south-west Tasmania. Fifteen years of drought has seen the birds' supply of seeds dwindle to almost nothing. Water has been allocated for irrigation and piped away from the region.

A last throw of the dice involves catching 10 pairs then breeding them in a caged area. This kind of action is unusual. It would be expected that eggs be taken from nests of wild birds, with hatching done in an incubator then hand feeding. This way more eggs would be laid when the initial eggs are taken away.

Once wild birds are taken from the wild they will always be domesticated. Learning from older birds ends.  There is no way that knowledge of feeding grounds can be passed on.
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Conservation by Ty Buchanan
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Angus Cattle Carry a Dangerous Recessive Gene

There are serious problems involved in breeding top class cattle for the market. Like in breeding budgerigars recessive genes coming together can cause some young to be victims of early death.

In creating the "perfect" animal, weaknesses have been seen in Angus cattle. The disease is call Development Duplication (DD). Its general name is polymelia. Embryos are dying and some are born with extra limbs.

The disease is common in all cattle, but selective breeding has increase its prominence in Angus cattle. Some affected animals have had operations to remove extra limbs. This is complicating the issue particularly if they are used for breeding.

Tests are available to identify the recessive gene causing the problem. It occurs at a rate of 3 per cent in the Angus breed. Pairing a sire with the recessive to a dam without it produces a normal calf. The recessive gene is passed on, however, not eliminated. It is believed that the presence of the gene has improved growth and fertility. This is a dangerous path to follow. Keeping something deleterious for perceived market benefits.
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Conservation
Australian Blog                         
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