| 词条 | Catshark |
| 释义 |
| name = Catshark | fossil_range = {{Geological range|Upper Jurassic|Present|ref=[1]}} | image = Catshark oedv.jpg | image_caption = Whitesaddled catshark, Scyliorhinus hesperius | taxon = Scyliorhinidae | authority = T. N. Gill, 1862 }}Catsharks are ground sharks of the family Scyliorhinidae. They are one of the largest families of sharks with around 160 species placed in 17 genera.[2] Although they are generally known as catsharks, many species are commonly called dogfish or gato.{{Citation needed|date=April 2017}} Like most bottom feeders, they feed on benthic invertebrates and smaller fish. Catsharks are not harmful to humans. GeneraThe family includes 17 genera and over 150 species,[1] making it the largest family of sharks.[4]
Cladogram
Anatomy and appearanceCatsharks may be distinguished by their elongated, cat-like eyes and two small dorsal fins set far back. Most species are fairly small, growing no longer than 80 cm (31 in); a few, such as the nursehound (Scyliorhinus stellaris) can reach 1.6 m (5.2 ft) in length. Most of the species have a patterned appearance, ranging from stripes to patches to spots. Characteristics of genus Apristurus are mostly dark bodies, having a long anal fin that ends in front of where the lower caudal fin begins. The snouts of the members of Apristurus are flat. They also present upper and lower labial furrows. The sonic hedgehog dentition expression is first found as a bilateral symmetrical pattern and is found in certain areas of the embryonic jaw.[2] Sonic hedgehog is involved in the growth and patterning of different organs.[3] Every 18–38 days the teeth are replaced as is a common characteristic of the developmental process of sharks. The "swell sharks" of the genus Cephaloscyllium have the curious ability to fill their stomachs with water or air when threatened, increasing their girth by a factor of one to three. Some catsharks, such as the chain catshark are biofluorescent.[4][5][6] DistributionCatsharks are found around seabeds in temperate and tropical seas worldwide, ranging from very shallow intertidal waters to depths of 2,000 m (6,600 ft) or more, such as the members of genus Apristurus[7] The Red spotted catshark lives in the shallower rocky waters ranging from Peru to Chile and migrate to deeper waters during the winter months.[8] They are usually restricted to small ranges. Juvenile and adult chain dogfish live on the soft or rocky bottom of the Atlantic from Massachusetts to Nicaragua. Adults tend to live on the soft sandy bottoms possibly due to their need of egg deposition sites.[9] BehaviorSome catsharks do not undergo long distance migrations because they are poor swimmers. Due to being nocturnal, some species sleep close together in crevices throughout the day and then go hunting at night.[2] Some species such as the small spotted catshark, Scyliorhinus canicula, are sexually monomorphic and exhibit habitat segregation, where males and females live in separate areas; males tend to live in open seabeds, while females tend to live in caves.[10] Some species of catsharks may deposit egg cases in structured habitats, which may also act as nurseries for the newly hatched sharks.[9] ReproductionMany species of catshark, like the chain dogfish, are oviparous and lay eggs in tough egg cases with curly tendrils at each end, known as "mermaid's purses", for protection, onto the seabed.[11] It takes almost a year for a catshark to hatch from the egg. Instead of laying the eggs and letting them sit for a year, some species of catshark hold onto the egg until a few months before the shark hatches. Some catsharks exhibit ovoviviparity, aplacental viviparous, by holding onto the embryos until they are completely developed and then give live birth.[12] Some species of catsharks mate by biting and holding the female’s pectoral fins and wrestle her into a mating position. AquariaThe Australian marbled catshark, Atelomycterus macleayi, is a favored type for home aquaria, because it rarely grows to more than {{convert|60|cm|in|abbr=on}} in length.{{Citation needed|date=January 2009}} The coral catshark, however, is the most common scyliorhinid in home aquaria.[13] {{clear}}References1. ^1 {{FishBase family|family=Scyliorhinidae|year=2009|month=January}} 2. ^{{Cite journal|last=Smith|first=M. M.|last2=Frase|first2=G. J|last3=Chaplin|first3=N.|last4=Hobbs|first4=C.|last5=Graham|first5=A.|date=April 7, 2009|title=Reiterative pattern of sonic hedgehog expression in the catshark dentition reveals a phylogenetic template for jawed vertebrates.|url=|journal=Proceedings of the Royal Society B: Biological Sciences|doi=10.1098/rspb.2008.1526|pmid=19141424|volume=276|issue=1660|pages=1225–1233|pmc=2660956}} 3. ^{{Cite journal|last=Dassule|first=Helene|last2=Lewis|first2=Paula|last3=Bei|first3=Marianna|last4=Maas|first4=Richard|last5=McMahon|first5=Andrew|date=October 24, 2000|title=Sonic Hedgehog regulates growth and morphogenesis of the tooth|url=|journal=Development|doi=|pmid=|access-date=}} 4. ^{{Cite web|title = Scientists Discover 180 Species of Glowing Fish|url = https://www.wired.com/2014/01/biofluorescent-fish-bonanza/|access-date = 2015-07-08}} 5. ^{{Cite web|title = Sharks Light Up in Neon Colors|url = http://video.nationalgeographic.com/video/news/neon-sharks-vin|website = video.nationalgeographic.com|access-date = 2015-07-08}} 6. ^{{Cite journal|title = The Covert World of Fish Biofluorescence: A Phylogenetically Widespread and Phenotypically Variable Phenomenon|journal = PLoS ONE|date = January 8, 2014|pmc = 3885428|pmid = 24421880|pages = e83259|volume = 9|issue = 1|doi = 10.1371/journal.pone.0083259|first = John S.|last = Sparks|first2 = Robert C.|last2 = Schelly|first3 = W. Leo|last3 = Smith|first4 = Matthew P.|last4 = Davis|first5 = Dan|last5 = Tchernov|first6 = Vincent A.|last6 = Pieribone|first7 = David F.|last7 = Gruber}} 7. ^{{Cite journal|last=Gomes|first=U. L.|last2=Signori|first2=C. N.|last3=Gadig|first3=O. B.|date=2006|title=Report on the smallfin catshark Apristurus parvipinnis Springer & Heemstra (Chondrichthyes, Scyliorhinidae) in Western South Atlantic with notes on its taxonomy |url= |journal=Panamjas |doi= |pmid= |access-date=}} 8. ^{{Cite journal|last=Farina|first=Jose M.|last2=Ojeda|first2=F. Patricio|date=May 3, 1993|title=Abundance, Activity, and Trophic Patterns of the Redspotted Catshark, Schroederichthys chilensis, on the Pacific Temperate Coast of Chile.|url=|journal=Copeia|doi=10.2307/1447159|volume=1993|issue=2|pages=545–549|jstor=1447159}} 9. ^1 {{Cite journal|last=Able|first=K.W.|last2=Flescher|first2=D|date=1991|title=Distribution and Habitat of Chain Dogfish, Scyliorhinus retifer, in the Mid-Atlantic Bight.|url=|journal=Copeia|volume=1991|issue=1|pages=231–234|doi=10.2307/1446270|pmid=|access-date=|jstor=1446270}} 10. ^{{Cite journal|last=Wearmouth|first=V. J|last2=Southall|first2=E. J|last3=Morritt|first3=D|last4=Thompson|first4=R. C|last5=Cuthill|first5=I. C|last6=Partridge|first6=J. C.|last7=Sims|first7=D. W.|date=2012|title=Year-round sexual harassment as a behavioral mediator of vertebrate population dynamics.|url=|journal=Ecological Monographs|doi=10.1890/11-2052.1|volume=82|issue=3|pages=351–366}} 11. ^{{Cite journal|last=Castro|first=J. I|last2=Bubucis|first2=P. M|last3=Overstrom|first3=N. A|date=1988|title=The Reproductive Biology of the Chain Dogfish, Scyliorhinus retifer|url=|journal=Copeia|volume=1988|issue=3|pages=740|doi=10.2307/1445396|pmid=|access-date=|jstor=1445396}} 12. ^1 2 {{Cite book|title=Sharks of the world.|last=Compagno|first=L. J|last2=Dando|first2=M|last3=Fowler|first3=S. L|publisher=Princeton University Press.|year=2005|isbn=|location=|pages=186}} 13. ^1 {{Citation | last = Michael | first = Scott W. | title = Sharks at Home | newspaper = Aquarium Fish Magazine | pages = 20–29 |date=March 2004}} External links
2 : Scyliorhinidae|Extant Late Jurassic first appearances |
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