co-ordinated attack behavior and prey sharing by killer whales at
... mediately followed by porpoising surfacings of two other killer whales. The entire group accelerated to 25-30 km/h and swam towards the mouth of a creek flowing into the bay. A minke whale calf was seen to surface slightly ahead of the killer whales. At 1337 the calf stranded on a sand bar in the mo ...
... mediately followed by porpoising surfacings of two other killer whales. The entire group accelerated to 25-30 km/h and swam towards the mouth of a creek flowing into the bay. A minke whale calf was seen to surface slightly ahead of the killer whales. At 1337 the calf stranded on a sand bar in the mo ...
Short-finned pilot whales - Aquatic Mammal Journal`s
... season. The group traveled slowly northwest while our vessel followed at idle or zero speed for 63 min. The whales exhibited mixed logging (floating motionless in a group on the surface) and milling (animals active but no directional displacement, i.e. travel) activities with some individuals ‘surfi ...
... season. The group traveled slowly northwest while our vessel followed at idle or zero speed for 63 min. The whales exhibited mixed logging (floating motionless in a group on the surface) and milling (animals active but no directional displacement, i.e. travel) activities with some individuals ‘surfi ...
The Role of Whales in Marine Ecosystems
... Whales as Consumers “The combination of great abundance, large body size, and endothermic metabolic demands make odontocete and mysticete whales some of the most voracious consumers in the oceans. As such, they have the potential to place extraordinary pressures on marine resources.” (Williams 2006 ...
... Whales as Consumers “The combination of great abundance, large body size, and endothermic metabolic demands make odontocete and mysticete whales some of the most voracious consumers in the oceans. As such, they have the potential to place extraordinary pressures on marine resources.” (Williams 2006 ...
File - Warren Aquatics
... • Milk contains 40% fathumpbacks nurse for 11 months, fin whales nurse for 5 months. • Blue whale calves grow 180 pounds a day! • Many nurse for a year and when they return to the breeding ground the mothers leave their young. • In toothed whales, males leave the group once they mature. • Toothed wh ...
... • Milk contains 40% fathumpbacks nurse for 11 months, fin whales nurse for 5 months. • Blue whale calves grow 180 pounds a day! • Many nurse for a year and when they return to the breeding ground the mothers leave their young. • In toothed whales, males leave the group once they mature. • Toothed wh ...
What is a Whale - 2abilingue2008
... Whales have hair (although they have a lot less than land mammals, and have almost none as adults), Whales are warm-blooded (they maintain a high body temperature), Whales have mammary glands with which they nourish their young, Whales have a four-chambered heart. ...
... Whales have hair (although they have a lot less than land mammals, and have almost none as adults), Whales are warm-blooded (they maintain a high body temperature), Whales have mammary glands with which they nourish their young, Whales have a four-chambered heart. ...
cetacean behaviour - Mater Academy Lakes High School
... -aggression (eg humpback - fin slapping) -vocalisations (eg humpback song – territories) -sperm competition (on average testes 25x larger than expected - dusky dolphins testes relatively 100x larger than humans) ...
... -aggression (eg humpback - fin slapping) -vocalisations (eg humpback song – territories) -sperm competition (on average testes 25x larger than expected - dusky dolphins testes relatively 100x larger than humans) ...
July 2014 - Monterey Bay Chapter, American Cetacean Society
... and distribute nutrients through the water. Even their carcasses, dropping to the seafloor, provide habitat for many species that only exist on these "whale falls." Commercial whaling dramatically reduced the biomass and abundance of great whales. ...
... and distribute nutrients through the water. Even their carcasses, dropping to the seafloor, provide habitat for many species that only exist on these "whale falls." Commercial whaling dramatically reduced the biomass and abundance of great whales. ...
October 1996
... whale B, which was more than 100 m southwest of them. The whales were last observed at 0915 approximately 2 km southwest of the location where they were first encountered. It is believed that one shark was captured by a single killer whale, presumably whale A (this whale was the first one seen holdi ...
... whale B, which was more than 100 m southwest of them. The whales were last observed at 0915 approximately 2 km southwest of the location where they were first encountered. It is believed that one shark was captured by a single killer whale, presumably whale A (this whale was the first one seen holdi ...
A New View of Species Extinction - The Dartmouth Undergraduate
... as approximately three school buses (70 to 90 feet) and weigh between 200 and 300 thousand pounds. The blue whale has a heart the size of a small car and a tongue that weighs as much as an elephant (9, 15). These creatures leave us in awe. However, we know relatively little about blue whales. Unlike ...
... as approximately three school buses (70 to 90 feet) and weigh between 200 and 300 thousand pounds. The blue whale has a heart the size of a small car and a tongue that weighs as much as an elephant (9, 15). These creatures leave us in awe. However, we know relatively little about blue whales. Unlike ...
6th-8th Grade Whale Watching Adventure Packet
... How do marine mammals stay warm? There are two ways to stay warm, blubber or thick fur. Seals and sea lions have a little bit of both, some fur but mostly blubber. Blubber is an extra layer of fat under their skin. Whales and dolphins (or cetaceans- se-tayshuns) have a few sparse hairs but no fur ...
... How do marine mammals stay warm? There are two ways to stay warm, blubber or thick fur. Seals and sea lions have a little bit of both, some fur but mostly blubber. Blubber is an extra layer of fat under their skin. Whales and dolphins (or cetaceans- se-tayshuns) have a few sparse hairs but no fur ...
Now - International Whaling Commission
... INTRODUCTION The Southeast Pacific right whale is the most threatened and less known population of this species in the South Hemisphere. Historical records show that this population was intensively exploited in Antarctic waters and southern Chile since the IXX century where around 9,000 whales were ...
... INTRODUCTION The Southeast Pacific right whale is the most threatened and less known population of this species in the South Hemisphere. Historical records show that this population was intensively exploited in Antarctic waters and southern Chile since the IXX century where around 9,000 whales were ...
Marine Mammals
... • Killer whale – 90+ years • But only 20-25 years in captivity • Blue whales - 100+ years • Bowhead whales – 218 years + Long life cycles and low reproductive rate means that the recovery of depleted populations is slow ...
... • Killer whale – 90+ years • But only 20-25 years in captivity • Blue whales - 100+ years • Bowhead whales – 218 years + Long life cycles and low reproductive rate means that the recovery of depleted populations is slow ...
chapter_9_powerpoint_im
... fibrous plates that hang from upper jaws. • Made from Keratin, and have overlapping hair-like bristles. • Filter feed by taking a large mouthful of H2O and forcing it out through the baleen. • The whale then licks the trapped food off the bristles. ...
... fibrous plates that hang from upper jaws. • Made from Keratin, and have overlapping hair-like bristles. • Filter feed by taking a large mouthful of H2O and forcing it out through the baleen. • The whale then licks the trapped food off the bristles. ...
are antarctic minke whales unusually abundant?
... In the Southern Ocean, large whales such as blue, humpback, sei and fin whales, share the water with smaller Antarctic minke whales. All of these whales use baleen plates in their mouths to filter feed for krill. In the 20 th century, whalers removed more than two million large whales from the South ...
... In the Southern Ocean, large whales such as blue, humpback, sei and fin whales, share the water with smaller Antarctic minke whales. All of these whales use baleen plates in their mouths to filter feed for krill. In the 20 th century, whalers removed more than two million large whales from the South ...
3rd-5th Grade Whale Watching Adventure Packet
... stalk their prey like a lion and attack them quickly using their sharp teeth to grab them and kill them. You can relate dolphins and orcas to other predatory packs like lions or wolves. Baleen Whales- These whales have very special teeth called baleen. Whales that have baleen are gray whales, blue ...
... stalk their prey like a lion and attack them quickly using their sharp teeth to grab them and kill them. You can relate dolphins and orcas to other predatory packs like lions or wolves. Baleen Whales- These whales have very special teeth called baleen. Whales that have baleen are gray whales, blue ...
Populations III: Harvest Models
... Hindsight always helps – the Allee effect Low population density is prone to sudden extinction Fewer mating opportunities; simply too few to be fit enough Logistic ...
... Hindsight always helps – the Allee effect Low population density is prone to sudden extinction Fewer mating opportunities; simply too few to be fit enough Logistic ...
PDF - Lumos Learning
... the ocean. The size of its body is amazing. This whale can grow up to 98 feet long and weigh as much as 200 tons, making it the largest known animal to have ever existed. Its body is long and elegantly tapered, unlike other whales which have a rounder, stockier build. Their build, along with their ...
... the ocean. The size of its body is amazing. This whale can grow up to 98 feet long and weigh as much as 200 tons, making it the largest known animal to have ever existed. Its body is long and elegantly tapered, unlike other whales which have a rounder, stockier build. Their build, along with their ...
Marine Mammals
... likely to be a threat BUT... conclusive evidence is lacking due to complex ecosystem dynamics ...
... likely to be a threat BUT... conclusive evidence is lacking due to complex ecosystem dynamics ...
Extinction and Food Chain - Environmental Science Institute
... at the time. In 1972, IWC abandoned the use of BWU and began to regulate catching by species and stocks2. Starting from 1986, the limit for whale catching was set to zero. Industries may resume whaling if the stock of a species is recovered to above 54% of historical abundance7. However, there is cu ...
... at the time. In 1972, IWC abandoned the use of BWU and began to regulate catching by species and stocks2. Starting from 1986, the limit for whale catching was set to zero. Industries may resume whaling if the stock of a species is recovered to above 54% of historical abundance7. However, there is cu ...
Whales and Whaling
... • will not consider lifting the moratorium on commercial whaling until Revised Management Scheme (RMS) is in place. • Opposes Iceland’s reservation to the moratorium on commercial whaling. • strongly questions Japan’s and Iceland’s claims that lethal scientific whaling is necessary to evaluate the i ...
... • will not consider lifting the moratorium on commercial whaling until Revised Management Scheme (RMS) is in place. • Opposes Iceland’s reservation to the moratorium on commercial whaling. • strongly questions Japan’s and Iceland’s claims that lethal scientific whaling is necessary to evaluate the i ...
MidTerm Answer Key
... 31. Explain how each of the following aspects of climate change will affect marine mammals, and provide one example. (4 points) a. Warming oceanic temperatures Warming waters are latitudinally changing the distribution of some marine mammals. This is especially threatening for species that cannot sh ...
... 31. Explain how each of the following aspects of climate change will affect marine mammals, and provide one example. (4 points) a. Warming oceanic temperatures Warming waters are latitudinally changing the distribution of some marine mammals. This is especially threatening for species that cannot sh ...
Whale transitions from land to water
... What environmental factors are responsible for driving this transition? Evolution of whale hearing? ...
... What environmental factors are responsible for driving this transition? Evolution of whale hearing? ...
Southern Right Whale - Natural Resources South Australia
... The raised whitish patches of thickened skin on Southern Right Whales are called callosities and are encrusted with marine lice and barnacles. They are present on calves from birth and can be used to individually identify whales throughout their lifetime (like unique birthmarks). A Southern Right Wh ...
... The raised whitish patches of thickened skin on Southern Right Whales are called callosities and are encrusted with marine lice and barnacles. They are present on calves from birth and can be used to individually identify whales throughout their lifetime (like unique birthmarks). A Southern Right Wh ...
Blue whale
The blue whale (Balaenoptera musculus) is a marine mammal belonging to the baleen whales (Mysticeti). At 30 metres (98 ft) in length and 180 tonnes (200 short tons) or more in weight, it is the largest extant animal and is the heaviest known to have existed.Long and slender, the blue whale's body can be various shades of bluish-grey dorsally and somewhat lighter underneath. There are at least three distinct subspecies: B. m. musculus of the North Atlantic and North Pacific, B. m. intermedia of the Southern Ocean and B. m. brevicauda (also known as the pygmy blue whale) found in the Indian Ocean and South Pacific Ocean. B. m. indica, found in the Indian Ocean, may be another subspecies. As with other baleen whales, its diet consists almost exclusively of small crustaceans known as krill.Blue whales were abundant in nearly all the oceans on Earth until the beginning of the twentieth century. For over a century, they were hunted almost to extinction by whalers until protected by the international community in 1966. A 2002 report estimated there were 5,000 to 12,000 blue whales worldwide, in at least five groups. More recent research into the Pygmy subspecies suggests this may be an overestimate. Before whaling, the largest population was in the Antarctic, numbering approximately 239,000 (range 202,000 to 311,000). There remain only much smaller (around 2,000) concentrations in each of the eastern North Pacific, Antarctic, and Indian Ocean groups. There are two more groups in the North Atlantic, and at least two in the Southern Hemisphere. As of 2014, the Californian blue whale population has rebounded to nearly its pre-hunting population.