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The video evidence suggests that while the jaws are definitely unique, goblin sharks use ram feeding, a type of prey capture that is typical of many mackerel sharks. [30] What makes the goblin shark unique is the kinematics of their jaw when feeding. The lower jaw seems to undergo more complex movements and is important in capturing the prey.
In bdelloid rotifers, females reproduce exclusively by parthenogenesis (obligate parthenogenesis), [5] while in monogonont rotifers, females can alternate between sexual and asexual reproduction (cyclical parthenogenesis). At least in one normally cyclical parthenogenetic species obligate parthenogenesis can be inherited: a recessive allele ...
The most distinctive characteristic of the goblin sharks is the long, trowel-shaped, beak-like snout, much longer than those of other sharks. Its long snout is covered with ampullae of Lorenzini that enable it to sense minute electric fields produced by nearby prey, which it can snatch up by rapidly extending its jaws. [ 5 ]
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Parthenogenesis is a mode of asexual reproduction in which offspring are produced by females without the genetic contribution of a male. Among all the sexual vertebrates, the only examples of true parthenogenesis, in which all-female populations reproduce without the involvement of males, are found in squamate reptiles (snakes and lizards). [1]
Yoko, a baby swell shark, was born at Shreveport Aquarium in Shreveport, Louisiana on Jan. 3. ... First, the egg may have been a result of parthenogenesis, a rare form of asexual reproduction.
Asexual reproduction is a type of reproduction that does not involve the fusion of gametes or change in the number of chromosomes. The offspring that arise by asexual reproduction from either unicellular or multicellular organisms inherit the full set of genes of their single parent and thus the newly created individual is genetically and ...
Parthenogenesis in sharks has been confirmed in the bonnethead [35] and zebra shark. [36] Other, usually sexual species, may occasionally reproduce parthenogenetically, and the hammerhead and blacktip sharks [37] are recent additions to the known list of facultative parthenogenetic vertebrates. A special case of parthenogenesis is gynogenesis.