The speckled smooth-hound (Mustelus mento) is a houndshark of the familyTriakidae. It is found on the continental shelf of the eastern Pacific, between latitudes0° and 54° S, at depths between 16 and 50 m (52 and 164 ft). It can reach a length of 130 cm (51 in). Collectively with certain other species of shark, it is known as "tollo".
The speckled smooth-hound is a robust shark with a moderately long, blunt snout, small eyes, short mouth and molar-like teeth without cusps. The trailing edge of the dorsal fins have small, pointed projections. The pectoral fins are large and the pelvic fins moderately large. The caudal peduncle is short and the lower lobe of the tail fin is narrow and slightly curved. The maximum length is about 130 cm (51 in) with maturity being reached by males at about 70 cm (28 in) and females at about 88 cm (35 in). Adults are grey or greyish-brown above and paler below, liberally speckled with white spots. Juveniles have dark bars.[2]
Distributionedit
The speckled smooth-hound is found off the Pacific coast of South America, including the Galapagos Islands and the Juan Fernández Islands. Its range extends from the Isla Lobos de Tierra in Peru to the southern tip of Chile. It is a demersal fish and swims close to the seabed on the continental shelf at depths of between 16 and 50 m (52 and 164 ft).[3] Reports of this fish occurring in the Atlantic Ocean off the coast of Argentina are thought to be erroneous, and are likely to refer to the narrownose smooth-hound (Mustelus schmitti), another shark that is speckled with white spots.[1]
Jaws
Upper teeth
Lower teeth
Biologyedit
The speckled smooth-hound is ovoviviparous with eggs that develop within the female and hatch into juvenile fish which are about 30 cm (12 in) at birth. Litter sizes are typically seven.[2]
Statusedit
Along with the humpback smooth-hound (Mustelus whitneyi) and the spotted houndshark (Triakis maculata), this fish is known to local fisheries as "tollo" and is caught by artisan fishermen using gill nets.[1] Landings in Chile peaked in 1989 at around 1300 tons but have since dwindled to less than 200 tons a year, with fish stocks declining and a transfer of the fisheries to targeting rays. In 2001, the Peruvian authorities introduced a minimum size requirement of 60 cm (24 in) for tollo. The speckled smooth-hound is assessed by the IUCN as being "critically endangered".[1]
Referencesedit
Wikimedia Commons has media related to Mustelus mento.
^ abcdDulvy, N.K.; Acuña, E.; Bustamante, C.; Concha, F.; Herman, K.; Velez-Zuazo, X. (2021). "Mustelus mento". IUCN Red List of Threatened Species. 2021: e.T63128A203720849. doi:10.2305/IUCN.UK.2021-2.RLTS.T63128A203720849.en. Retrieved 19 November 2021.
^ abCompagno, L.J.V. "Speckled smooth-hound (Mustelus mento)". Sharks of the World. Marine Species Identification Portal. Retrieved 2014-08-30.
speckled, smooth, hound, speckled, smooth, hound, mustelus, mento, houndshark, family, triakidae, found, continental, shelf, eastern, pacific, between, latitudes, depths, between, reach, length, collectively, with, certain, other, species, shark, known, tollo,. The speckled smooth hound Mustelus mento is a houndshark of the family Triakidae It is found on the continental shelf of the eastern Pacific between latitudes 0 and 54 S at depths between 16 and 50 m 52 and 164 ft It can reach a length of 130 cm 51 in Collectively with certain other species of shark it is known as tollo Speckled smooth houndConservation statusCritically Endangered IUCN 3 1 1 Scientific classificationDomain EukaryotaKingdom AnimaliaPhylum ChordataClass ChondrichthyesSubclass ElasmobranchiiSubdivision SelachimorphaOrder CarcharhiniformesFamily TriakidaeGenus MustelusSpecies M mentoBinomial nameMustelus mentoCope 1877 Contents 1 Description 2 Distribution 3 Biology 4 Status 5 ReferencesDescription editThe speckled smooth hound is a robust shark with a moderately long blunt snout small eyes short mouth and molar like teeth without cusps The trailing edge of the dorsal fins have small pointed projections The pectoral fins are large and the pelvic fins moderately large The caudal peduncle is short and the lower lobe of the tail fin is narrow and slightly curved The maximum length is about 130 cm 51 in with maturity being reached by males at about 70 cm 28 in and females at about 88 cm 35 in Adults are grey or greyish brown above and paler below liberally speckled with white spots Juveniles have dark bars 2 Distribution editThe speckled smooth hound is found off the Pacific coast of South America including the Galapagos Islands and the Juan Fernandez Islands Its range extends from the Isla Lobos de Tierra in Peru to the southern tip of Chile It is a demersal fish and swims close to the seabed on the continental shelf at depths of between 16 and 50 m 52 and 164 ft 3 Reports of this fish occurring in the Atlantic Ocean off the coast of Argentina are thought to be erroneous and are likely to refer to the narrownose smooth hound Mustelus schmitti another shark that is speckled with white spots 1 nbsp Jaws nbsp Upper teeth nbsp Lower teethBiology editThe speckled smooth hound is ovoviviparous with eggs that develop within the female and hatch into juvenile fish which are about 30 cm 12 in at birth Litter sizes are typically seven 2 Status editAlong with the humpback smooth hound Mustelus whitneyi and the spotted houndshark Triakis maculata this fish is known to local fisheries as tollo and is caught by artisan fishermen using gill nets 1 Landings in Chile peaked in 1989 at around 1300 tons but have since dwindled to less than 200 tons a year with fish stocks declining and a transfer of the fisheries to targeting rays In 2001 the Peruvian authorities introduced a minimum size requirement of 60 cm 24 in for tollo The speckled smooth hound is assessed by the IUCN as being critically endangered 1 References edit nbsp Wikimedia Commons has media related to Mustelus mento a b c d Dulvy N K Acuna E Bustamante C Concha F Herman K Velez Zuazo X 2021 Mustelus mento IUCN Red List of Threatened Species 2021 e T63128A203720849 doi 10 2305 IUCN UK 2021 2 RLTS T63128A203720849 en Retrieved 19 November 2021 a b Compagno L J V Speckled smooth hound Mustelus mento Sharks of the World Marine Species Identification Portal Retrieved 2014 08 30 Mustelus mento Cope 1877 speckled smooth hound FishBase Retrieved 2014 08 31 Retrieved from https en wikipedia org w index php title Speckled smooth hound amp oldid 1148573998, wikipedia, wiki, book, books, library,
