J stock whales' primary prey type is Japanese anchovy during May and June, Pacific saury in July and August, and krill in September. How do marine invertebrates detect sounds? What is a spectrogram? The Minke whale is the second smallest of the baleen category. Minke whales feed by gulping large amounts of water, but like us, can’t drink saltwater. At rest, minke whales spout (breathe) about 5–6 times per minute. The dwarf form of the common minke whale produces a complex and stereotyped vocalization called the “star-wars” vocalization. Minke Whale Range Species Fact: The scientific name for the minke whales translate to: "winged whale" (Balaenoptera), "sharp snout" (acutorostrata). Following the moratorium, most hunting of minke whales ceased. The anti-predatory mechanism of the minke whale is strictly a flight response, as when this fails no physical retaliation is observed. Science Tutorial: How does sound in air differ from sound in water? How do marine invertebrates produce sounds? [citation needed] Between November 2017 and March 2018, Japan reported catches of a total of 333 Minke whales, of which 122 were pregnant females.[35]. Where do Antarctic minke whales live? How does sound travel long distances? On occasion, two whales could be seen surfacing at the same time, within one or two body lengths of each other – such associations could last for only one surfacing to as long as about 90 minutes. How is sound used to estimate marine mammal abundance? Minke whales appear to have distinctly different songs in each geographic region. Minke definition, a dark-colored baleen whale, Baleanoptera acutorostrata, inhabiting temperate and polar seas and growing to a length of 33 feet (10 meters): reduced in numbers. Both species undertake seasonal migration routes to the poles during spring and towards the tropics during fall and winter. A 2007 analysis of DNA fingerprinting of whale meat estimated South Korean fishermen caught 827 minke between 1999 and 2003,[38] approximately twice the officially reported number. CS1 maint: multiple names: authors list (. How is sound used to monitor nuclear testing? All minke whales are part of the rorquals, a family that includes the humpback whale, the fin whale, the Bryde's whale, the sei whale and the blue whale. Determine if a sound affects a marine animal, Potential effects of sound on marine mammals, Potential effects of sound on marine fishes, Acoustic Issues Related to Diadromous Fishes, Measure marine mammal’s reaction to sound, Moderate or eliminate the effects of human activities, Blast Injury, Barotrauma, and Acoustic Trauma. The minke whale can create sounds at over 150 decibel and be heard from many miles away. How is sound used to measure temperature in the ocean? [28], Antarctic minke whales are diurnal feeders. In four of the nine cases the adultsized minke whale gradually outdistanced the killer whales, which abandoned the high‐speed pursuit after 0.5–1 h. In one case the minke beached itself and died. As their name suggests, Antarctic minke whales live mainly in Antarctica! The Antarctic minke whale is found in southern hemisphere waters, where a dwarf subspecies of the common minke whale also exists. [19] Minke whale carcasses investigated after attacks show that killer whales have an affinity for minke tongues and lower jaw. Difference between the timing of the seasons may prevent the two closely related species from mixing. They aren’t likely to be more than 35 feet long or to weigh more than 5.5 tons. Dwarf minke whales produce … Tutorial: How can we moderate or eliminate the effects of human activities? Upon reaching sexual maturity (6–8 years of age), males measure an average of 6.9 m (23 ft) and females 8 m (26 ft) in length, respectively. Environmental organizations and several governments contend that research whaling is simply a cover for commercial whaling. (2014). The Minke (pronounced mink-ee) Balaenoptera acutorostrata whale is the smallest of the baleen whales, the largest being the Blue whale, which we’ll get to on their own page.Although the Minke is stated as being the most abundant of the whale species, they are not seen as frequently as one would think. Hearing in Cetaceans and Sirenians, the Fully Aquatic Ear. [1] The two species of minke whale are the common (or northern) minke whale and the Antarctic (or southern) minke whale. [20] Chases most commonly lead into open ocean, although there have been records of minke whales inadvertently swimming into confined, shallow waters. Other characteristics include two flippers that are very long, a dorsal fin that is small, and ridges around the back close to the tail. No other marine mammal species were observed in the area when the calls were recorded, and thus, the bio-ducks sound were attributed to the minke whales. Scroll below for some fun underwater sounds. Minke whales have been recorded off Scotland's east coast for the first time, scientists have said. It looks like the lyre bird and its futuristic laser sounds might finally have a challenger: the dwarf minke whale. 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[21] Before 1993, minke whales in the north Barents Sea fed predominantly on capelin until stocks collapsed and the whales switched to krill as their primary prey type. How does sea ice affect how sound travels? Minke whales, like all baleen whales, lack the system of air sacs and sound-generating ‘phonic lips’ in the forehead region above the skull, that are found in toothed whales, such as dolphins. 6 Magnificent Minke Whale Facts. This, combined with the fact that minkes can stay submerged for as long as 20 minutes, has led some whale-watchers to label them 'stinky minkes'.[40]. [8][9] In addition, at least two wild hybrids between a common minke whale and an Antarctic minke whale have been confirmed.[8][9][10]. [25] Seasonal variations are observed off of Finnmark, with krill the most popular prey type in the summer and cod in the autumn. Tutorial: Where are marine animals likely to be located relative to the source? The minke whale /ˈmɪnki/, or lesser rorqual, is a species complex of baleen whale. How will ocean acidification affect ocean sound levels? Photo courtesy of Tom Jefferson. How is sound used to identify ecological hotspots? Minke Whale Sounds (Balaenoptera spp.) [18], Minke whales in the north Atlantic are observed to take a variety of food items. Most modern classifications split the minke whale into two species; Taxonomists further categorize the common minke whale into two or three subspecies; the North Atlantic minke whale, the North Pacific minke whale and dwarf minke whale. The songs are produced only in winter, which is thought to be the breeding season. However, in recent years, researchers have determined that enough scientific evidence exists to recognize two separate species. In minke whales, the sounds probably come from the larynx, although none of the baleen whales have vocal cords. Minke whales typically live for 30–50 years; in some cases they may live for up to 60 years. How is sound used to study underwater volcanoes? Although Norway initially followed the moratorium, they had placed an objection to it with the IWC and resumed a commercial hunt of the Common minke whale in 1993. Description Minke whale in Monterey Bay. Calving is thought to occur every two years.[16]. The 2006 catch by Japanese whalers included 505 Antarctic minke whales. What the sounds mean in whale-speak remains a mystery to scientists. BALEEN WHALES Blue Whale Bowhead Whale Bryde's Whale Fin Whale Gray Whale Humpback Whale Minke Whale North Atlantic However, in recent years, researchers have determined that enough scientific Document. [22] The minke whale population in the Norwegian Sea primarily feeds on adult herring [23] while krill, capelin, and sand eels are also recorded prey types. Minke whales also produce non-song sounds. However, by the early 1970s, following the overhunting of larger whales such as the sei, fin, and blue whales, minkes became a more attractive target of whalers. They make very loud sounds, up to 152 decibels (as loud as a jet taking off). In the early 2000’s, it was determined that minke whales were producing this sound. How does marine life affect ocean sound levels? In the Yellow Sea stock these two phases have not been noted with conception occurring from July to September and birth peaking from May to June. The stated purpose of the research is to establish data to support a case for the resumption of sustainable commercial whaling. How is sound used to study the Earth’s history? Minke whales begin exhaling before they reach the surface, which minimizes the blow. NatureServe lists them as G5 which means the species is secure on global range [2]. Common minke whales in the North Pacific produce a sound called the “boing.” This sound had been recorded for many years, its source unknown. By 1979, the minke was the only whale caught by Southern Ocean fleets. Acoustically, the minke populations across the globe are very different. "Modes of Production and Minke Whaling: The Case of Iceland", Voices in the Sea - Sounds of the Minke Whale, https://en.wikipedia.org/w/index.php?title=Minke_whale&oldid=991959243, Wikipedia articles needing clarification from May 2017, Articles with unsourced statements from August 2007, Articles with unsourced statements from May 2018, Creative Commons Attribution-ShareAlike License, This page was last edited on 2 December 2020, at 18:52. The grunts are between 165 to 320 msec long with most energy between 80 and 140 Hz. How is sound used to measure rainfall over the ocean? A limited number of reef tourism operators (based in Port Douglas and Cairns) have been granted permits by the Great Barrier Reef Marine Park Authority to conduct these swims, given strict adherence to a code of practice, and that operators report details of all sightings as part of a monitoring program. There are two species of minke whales: minke whales, aka common or northern minke whales, Balaenoptera acutorostrata (Lacépède, 1804, acutorostrata means ‘sharp snouted’) and Antarctic or southern minke whales, Balaenoptera bonaerensis(Burmeister, 1867). In contrast to humpback whales, minkes do not raise their flukes out of the water when diving and are less likely to breach (jump clear of the sea surface). Minke whales are very difficult to see in the ocean because they have a low or nonexistent blow or spout when they surface, they surface for a very brief amount of time, and they are usually found alone. Minke whale sounds recorded in the North Atlantic included grunts, thumps, and frequency down sweeps ranging to 200 Hz. The highly repetitive sound consists of a regular series of downswept pulses, ranging from 50-300 Hz, with an interval of 3.1 between the start of two series. Minke whale - Balaenoptera acutorostrata The minke whale is a medium-sized whale, sleek in shape, with a very pointed head.It is dark grey to black in colour with a white underside and has white patches behind the head and a distinctive bright white band on the outer part of the pectoral flippers. How is sound used to measure global climate change? In the North Pacific off Japan there appears to be two phases of conception, the majority of which occurs from February to March but also from August to September, with births occurring from December to January and June to July. Individual calling behaviour and movements of North Atlantic minke whales (. The spout of the minke whale is a very low, almost inconspicuous stream that rises up to 2 m above the water. These sounds are used to communicatevarious needs, wants and dangers to other whales within the area. This raised concerns that some whales were being caught deliberately. In the Pacific, the long-mysterious “boing” heard by acousticians has been identified as produced by common minke whales (Rankin and Barlow, 2005). How is sound used to communicate underwater? How is sound used to transmit data underwater? Reported maximum lengths vary from 9.1 to 10.7 m (30 to 35 ft) for females and 8.8 to 9.8 m (29 to 32 ft) for males. By the end of the 1930s, they were the target of coastal whaling by Brazil, Canada, China, Greenland, Japan, Korea, Norway, and South Africa.