![]() The eyes are large, twice as long as high, with the anterior and posterior corners acute. It has a long, wide, flattened head comprising a fourth to a fifth of its total length. The dwarf lanternshark appears to reach a maximum length of about 20 cm (7.9 in) (female). This shark apparently inhabits the upper continental slope at a depth of 283–439 m (928–1,440 ft). decacuspidatus) in having irregularly arranged, needle-shaped dermal denticles.Īt present, the dwarf lanternshark has only been reported from a small area of the Caribbean Sea off the coasts of Colombia and Venezuela, occurring between Barranquilla and Santa Marta, near the Guajira Peninsula, and between the Los Testigos Islands and Grenada. gracilispinis), and combtooth lanternshark ( E. This species is grouped with the velvet belly lantern shark ( E. The type specimen is a 18.2 cm (7.2 in) long female caught in the Caribbean Sea off the coast of Colombia. Gilbert, and published their findings in a 1985 Copeia paper. They dubbed the new species in honor of noted shark biologist Perry W. Fish and Wildlife Service research ship Oregon in 1964. Burgess described the dwarf lantern-shark from specimens collected via trawling by the U.S. His close relatives is the Caribbean Velvey Belly Lantern-Shark, Fringefrin Brown Lantern-Shark and Comb-Tooth Broad-Banded Lantern-Shark.Īmerican ichthyologists Stewart Springer and George H. The dwarf lantern-shark is not significant to commercial fisheries, but could be threatened by mortality from bycatch the degree of impact from human activities on its population is unknown. Reproduction is aplacental viviparous, with females gestating two or three young at a time. Like other members of its genus, it is capable of producing light from a distinctive array of photophores. This species can be identified by its small size at maturity, long flattened head, and pattern of black ventral markings and a mid-dorsal line. It is known to be present only on the upper continental slopes off Colombia and Venezuela, at a depth of 283–439 m (928–1,440 ft). An international patent is currently pending for the artificial uterus apparatus and rearing methods developed in this study.The dwarf lantern-shark ( Etmopterus perryi) is a little-known species of dogfish shark in the family Etmopteridae and possibly the smallest shark in the world, reaching a maximum known length of 20 cm (7.9 in). This project was supported by JSPS KAKENHI Grant Number JP17K19334(supported to Keiichi Sato). Our goal is to continue to improve the apparatus and use it to reveal the reproduction modes of rare shark species, and contribute toward their conservation. The artificial uterus apparatus that was developed 4 years ago can contribute to sustainable research and conservation of rare shark species that have declining populations. Okinawa Churaumi Aquarium is working to conserve Okinawa’s biodiversity. These are very rare.Ģ)The world’s first successful long-term rearing and artificial birth of a lantern shark.ģ)Artificial rearing can match the reproduction modes of shark species with the goal of contributing to the understanding and conservation of rare shark species. It replicates the environment of a shark’s womb.ġ)Artificial uterus apparatus for sharks was developed. This artificial uterus apparatus was developed by Okinawa Churaumi Aquarium and Okinawa Churashima Foundation Research Center in preparation for the premature delivery of sharks and rays with various reproduction modes. The pregnant female died shortly after being collected, however a 10 cm fetus was extracted from the mother’s body and was reared in an artificial uterus apparatus at the Okinawa Churaumi Aquarium for 146 days. On October 29th, 2020, a pregnant female specimen was collected from the sea floor, at a depth of around 500 meters, off the west coast of the Okinawa Main Island. (Receiving little nutrient supply from the mother) *It refers to the type of reproduction where the yolk is its main source of nutrition during gestation. The mechanisms of how the fetuses receive nutrients and oxygen is still unknown, however research has suggested that they are yoke dependent*. There are around 6 fetuses in each pregnancy between the left and right uterus. ![]() The Mollers lantern shark is ovoviviparous (eggs form and hatch in the mother, then born live). Until now, there had been no record of long-term rearing. There are very small luminous organs on the surface of its body which emit a faint blue light. It is widely distributed in the Pacific Ocean from Japan to Australia and New Zealand. It lives at depths from 260 to 860 meters. The Mollers lantern shark reaches just 40 cm in length.
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