Whales & Dolphins (Smithsonian Handbooks)

A beautifully illustrated guide to every species of whale, dolphin and porpoise. Covers their identification, evolution, biology, behaviour, reproduction and social lives. Includes tips on how and where to watch whales, dolphins and porpoises, and information on their conservation.

From the great illustrations and quick-reference title bar that includes taxonomic, habitat and population information, to the range maps and behavioral information, this book was such a steal. I received this book shortly before starting cetacean surveys in the south pacific and it was an incredible source of information. I have used many field guides and, although I never tested its 'water-proofness", it is simultaneously concise yet complete. It not only gives identification keys for individual species, but also keys to identifying individual animals. If you are a teacher, student, biologist or enthusiast, get it, wherever you are in the world.

Humpback whales boast the longest mammal migration

NewScientist.com news service

It’s a long way to go for a warm bath. Each winter, humpback whales travel from the Antarctic to the northern tropics to find warm water in which to raise their young, researchers have discovered. The migration is the longest for any mammal ever recorded.

Kristin Rasmussen at Cascadia Research Collective in Olympia, Washington, US, and colleagues photographed the tails of humpbacks wintering off the Caribbean coast of Costa Rica. From their individual tail patterns they identified seven of the same animals after they had returned to the Antarctic. One mother and calf made the 8300-kilometre (5160-mile) trip in 161 days.

Using satellite data, the team also recorded sea-surface temperatures for the sites where humpbacks spent the winter. “Wintering areas occur where waters with temperatures between 21°C and 28°C are found,” says Rasmussen. This supports the idea that the long migration saves the whales energy in the end.

Some researchers claim that the grey whale holds the record for longest mammalian migration – from Mexico to the Arctic, estimated at about 7600 km (4700 miles). “However, no individual grey whale has been documented travelling the full extent of their migratory range, and it's possible that no grey whales actually make the entire migration,” says Rasmussen. Only humpbacks have been documented making the full trip.

Rasmussen says that proposals to hunt humpbacks – such as Japan’s decision to catch 50 humpbacks each year as part of its “scientific” programme – makes it important to understand whale migration. “Whales don’t respect political boundaries,” she says. “Killing whales in one area could potentially impact their population half way around the world.”

Journal reference: Biology Letters (DOI: 10.1098/rsbl.2007.0067)

Humpbacks in Fiji

Great write up from Gavin at Dive The World Blog cos we're seeing humpbacks along the Coral Coast as well...

"Over the last few months, guests on the Tui Tai Adventure Cruises have been treated on several occasions to the sight of humpback whales around the boat. They have even been able to dive in and swim with the whales! In 2003, the government of Fiji declared a 360km "exclusive economic zone" around the Koro Sea a whale sanctuary ensuring free passage for whales through Fiji's waters. Humpbacks migrate every winter from Antarctica to the South Pacific to mate and give birth.

Back in the 19th century, thousands of whales were killed around Fiji, and indeed the town of Levuka was founded as a whaling station. It seems that thanks to whaling regulations and now the declaration of this special zone, visitors to Fiji have the chance to see whales again."