Based on the results of the study, it is recommended that a passive acoustic monitoring program for sperm whales be instigated offshore in the Perth and Albany canyon areas to measure and mitigate the effects of anthropogenic activities and their impacts on cetaceans. In southern Australia, there is evidence that the diet of sperm whales is dominated by oceanic, subtropical cephalopod species Evans and Hindell, Over most of the period from the early 18th century until the late 20th century, the sperm whale was hunted to obtain spermaceti and other products, such as sperm oil and ambergris. They are slow breeders, which means that the species has been slow to recover. When they close their mouths, the water is pushed out through the baleen and the prey is caught on the inside of the baleen. Originally it was used in everything from cosmetics to candles, and later on in car engines and other industrial activities too. Rob Harcourt , Macquarie University, Australia.
Structure and proportions of the spermaceti organ in the sperm whale. Canadian Journal of Fisheries and Aquatic Sciences. The primary dataset in this study is from the Voyage of the Odyssey —a 5-year, global, scientific expedition studying sperm whales and ocean pollution Bohannon, Charts compiled by Charles Townsend details sperm whale kills off Western Australia during Yankee whaling period in months of April—September — Townsend, Some, clicks are also probably used in echolocation. Underwater noise may threaten sperm whales by interrupting their normal behavior and driving them away from areas important to their survival. They have small dorsal fins that are low, thick, and usually rounded.
That said, they put up a good fight, and many whales carry the scars of their underwater encounters. They can be as long as a Boeing and six times as heavy. Humpback Whales tend to feed within 50m of the water's surface, taking krill and shoaling fish. Baby blue whale sighted on one of our tours. Sperm whales are also protected under the Marine Mammal Protection Act of The name 'Blue Whale' comes from their startling electric blue skin pigmentation that gives off a spectacular neon glow under water.
Size Maximum size approaches 20 m The growth in popularity of whale watching has also led to an increase in whale harassment by operators. Forgot username or password? Just as amazingly, they get to these depths in a matter of minutes. Do sperm whales attack people? Females carry their young for months, and calves are 13 feet 4 m long and weigh about a ton 1, kg when born.