Whale watchers may save species

Ordinary whale watchers are being called upon to help crack the genetic code of the southern right whale and possibly prevent its extinction.

The Conservation Department has been working to decipher the genetic code of the nationally endangered southern right whale (tohora) using biopsy samples.

The department needs 30 more samples to complete the research and is asking the public to help by reporting sightings of southern right whales.

DOC marine mammal officer Steve Smith said 22 individual genetic samples had been obtained from whales around New Zealand in the past six years, largely thanks to tipoffs from the public.

"We're racing against time to solve this mystery so the quicker we can get the 30 unique samples we need, the better."

Southern right whales are in serious peril around mainland New Zealand with possibly few breeding females remaining, Mr Smith said.

The samples would show any genetic similarities or differences between southern right whale populations in New Zealand and New Zealand's sub-Antarctic islands, he said. "If the New Zealand population is separate to New Zealand's sub-Antarctic islands we need to know." he said.

"We can then take measures to ensure the whales have the right level of protection from any potential threats, such as marine farms, ship strikes and coastal developments." DOC hoped to have enough samples before the end of the year, Mr Smith said.

WHALE WATCHING

What to look for: Adults are on average 15m long and newborn calves 4m-6m long. They are mostly black and can be identified by their lack of a dorsal fin, a V-shaped blowhole spray, and white growths on their heads called callosities.

What to do if you see a southern right whale:Take photos, especially the left side of the head and full body length. Whales should be approached slowly, quietly, cautiously, and no closer than 50m. Boaties should not obstruct their path, cut through a group, or separate mothers from calves. They should also turn off their engines if a whale approaches. Sudden noises may startle the animals and should be avoided. Aircraft should keep 150m from whales and not fly directly over them.