Behavioural responses of captive common dolphins Delphinus delphis to a 'Swim-with-Dolphin' programme". Applied Animal Behaviour Science. 2003. Walker M. (2013-01-28). Dolphins try to save dying companion. BBC Nature News. retrieved on 24-05-2014 The Pacific white-sided dolphin has a dark gray body with a white underside and distinctive gray stripes on the sides. Its snout is short and its dorsal fin tall and hooked. They are named because of their impressive acrobatic moves, where they jump high above the waves and spin around vertically.

Externals: Update cubeb to mozilla/cubeb@54217bca3f3e0cd53c073690a23dd25d83557909 ( PR #12310 from oltolm) Sadly, several dolphin species are endangered. We’ve included the IUCN conservation status of each species (Source: IUCN Red List, June 2023). You can use the table below to sort the dolphin species by conservation status. Types Of Dolphins Juvenile dolphins off the coast of Western Australia have been observed chasing, capturing, and chewing on blowfish. [129] While some reports state that the dolphins are becoming intoxicated on the tetrodotoxin in the fishes' skin, [130] other reports have characterized this behavior as the normal curiosity and exploration of their environment in which dolphins engage. [131] Tail-walking The Electra Dolphin, often known as the Melon-Headed Whale, is a subtropical oceanic dolphin rarely encountered at sea, preferring to swim far offshore beyond the continental shelf.Dolphins give birth to a single baby; the baby is usually born tail first (unlike most mammals) to minimise the risk of drowning. The birth can take a couple of hours. Park, Kyum J.; Sohn, Hawsun; An, Yong R.; Moon, Dae Y.; Choi, Seok G.; An, Doo H. (2012). "An unusual case of care-giving behavior in wild long-beaked common dolphins ( Delphinus capensis) in the East Sea". Marine Mammal Science. 29 (4): E508–E514. doi: 10.1111/mms.12012.

Scientists have found the spread of this behaviour, through up to two generations, surprising, as it brings no apparent advantage, and is very energy-consuming. [136] A 2018 study by Mike Rossley et al. suggested: [132] Dusky dolphins inhabit cool, upwelling-rich waters of the Southern Hemisphere, particularly around South America, New Zealand, and some parts of Africa. They are primarily coastal but can also be found in offshore waters. Breathing involves expelling stale air from their blowhole, in an upward blast, which may be visible in cold air, followed by inhaling fresh air into the lungs. Dolphins have rather small, unidentifiable spouts. [35] [36] Dolphins are highly social animals, often living in pods of up to a dozen individuals, though pod sizes and structures vary greatly between species and locations. In places with a high abundance of food, pods can merge temporarily, forming a superpod; such groupings may exceed 1,000 dolphins. Membership in pods is not rigid; interchange is common. They establish strong social bonds, and will stay with injured or ill members, helping them to breathe by bringing them to the surface if needed. [75] This altruism does not appear to be limited to their own species. The dolphin Moko in New Zealand has been observed guiding a female pygmy sperm whale together with her calf out of shallow water where they had stranded several times. [76] They have also been seen protecting swimmers from sharks by swimming circles around the swimmers [77] [78] or charging the sharks to make them go away. A large dolphin, the false killer whale typically measures up to 6 meters in length and can weigh as much as 1,500 kilograms. It is characterized by its elongated, slim body, rounded overhanging forehead, and small, conical, slightly upturned snout.

One example was reported by National Geographic in 1994. A dolphin rammed two men in Brazil, striking them with its snout at a high rate of speed. One of the men succumbed to internal injuries. a b c d e f g h i j Perrin, W. (2002). "Common Dolphins". In Perrin, W.; Wursig, B.; Thewissen, J. (eds.). Encyclopedia of Marine Mammals. Academic Press. pp. 245–248. ISBN 978-0-12-551340-1.

Bottlenoses are intelligent and charismatic and considered one of the smartest animals in the world. Common dolphins were abundant in the western Mediterranean Sea until the 1960s but occurrences there have tailed off rapidly. The reasons are not well understood, but are believed to be due to extensive human activity in the area. In the US, they are a protected species and sometimes are caught by accident in some trawler nets as by-catch, though despite this they are still quite common throughout their range. Despite these potential threats, the short-beaked common dolphin is considered to be Least Concern by the IUCN Red List, and the long-beaked common dolphin is listed as Data Deficient. [1] The Irrawaddy Dolphin is a euryhaline species, which means it can live in both salt and fresh water, although it is mostly found in the Bay of Bengal and Southeast Asia. Viricel, Amélia; Strand, Allan E.; Rosel, Patricia E.; Ridoux, Vincent; Garcia, Pascale (December 2008). "Insights on common dolphin (Delphinus delphis) social organization from genetic analysis of a mass-stranded pod". Behavioral Ecology and Sociobiology. 63 (2): 173–185. doi: 10.1007/s00265-008-0648-7. ISSN 0340-5443. S2CID 25991354. Bycatch is the main threat that common dolphins face today. Short-beaked common dolphins are taken as cetacean bycatch the most in all of Europe, given that they are the most abundant dolphin in the Eastern Atlantic. About 1000 short-beaked common dolphins are bycaught in the North Atlantic each year by either tuna drift, trawling and gillnetting. The regulation is that only cetacean bycatch can not be longer than 15 meters [36] and this can lead to be a problem because short-beaked common dolphins are only about 2.7 meters. Common dolphin bycatch is a particularly important issue in Galicia Spain, via trawler fishing. [37] The bycatch of short beaked dolphins in Galicia from May to September from 2001 to 2002, consisted of 394 individuals annually. Depth was an important factor in bycatch, as incidental capture mostly took place along the continental shelf in water less than 300 m deep. Very few entrapments took place when the depth exceeded 300 m. Time of day was also important as most dolphins became trapped in trawling nets at night (most active feeding takes place at night). Most of the dolphins captured were males and had a mean age of 13+- 4.4 years. It is believed that the reason why the vast majority of bycatch consisted of males is because bachelor pods appear to be particularly abundant in Galicia from the May–October season. This fact reinforces the hypothesis that common dolphins may be sexually segregated in the Northeast Atlantic. If there was a ban on fishing in Galicia in waters than less than 250 m deep, and if there were seasonal closures, it is estimated that 78% of the dolphins would not have been caught. [37] In the Western North Atlantic, dolphins are vulnerable to swordfish driftnet fishing, with the number of males being caught as bycatch, doubling the number of females. It was also found from stranding samples that males tend to strand more. This provides evidence of sex-based habitat partitioning or pod congregation. [37]The false killer whale, despite its name, is not directly related to the killer whale, or orca. The species is named for the similarity of its skull with that of the orca. Records the default button state of the corresponding category & the status of CCPA. It works only in coordination with the primary cookie. Adults have few predators. Their primary threat is humans. Many die each year after becoming entangled in fishing nets. What Eats Dolphins? AMD: Dolphin's workload didn't match the strengths of AMD processors until the Ryzen line. As such, we can only recommend Ryzen or newer for Dolphin among AMD's line of processors.