9/6/2023 0 Comments Zebra shark cute![]() ![]() felis being the senior synonym, an error in recording the dates of publication resulted in the widespread use of T. In April 1855, French biologist Charles Frédéric Girard published another description of this species, naming it Triakis semifasciata. His lecture was reprinted first in The Pacific, a San Francisco newspaper, and then in the journal Proceedings of the California Academy of Natural Sciences. In December 1854, American ichthyologist William Orville Ayres gave a lecture describing the species as Mustelus felis, which included the first scientific description of the species. ![]() However, Gray did not furnish the name with a proper description, rendering it a nomen nudum. The first scientific name applied to the leopard shark was Triakis californica, coined by British zoologist John Edward Gray in the 1851 List of the specimens of fish in the collection of the British Museum. ![]() The International Union for Conservation of Nature has assessed this species as of Least Concern, while noting that local stocks may easily become overfished because of the shark's slow growth and limited migratory habits. This species is mostly fished in the waters off California where, after a period of population decline in the 1980s, new fishing regulations in the early 1990s reduced harvesting to sustainable levels. Harmless to humans, the leopard shark is caught by commercial and recreational fisheries for food and the aquarium trade. It is relatively slow-growing and takes many years to mature. From March to June, the female gives birth to as many as 37 young after a gestation period of 10–12 months. This species is aplacental viviparous, meaning that the young hatch inside the uterus and are nourished by yolk. Most leopard sharks tend to remain within a particular area rather than undertaking long movements elsewhere, which has led to genetic divergence between populations of sharks living in different regions. They are most common near the coast, in water less than 4 m (13 ft) deep.Īctive-swimming predators, groups of leopard sharks often follow the tide onto intertidal mudflats to forage for food, mainly clams, spoon worms, crabs, shrimp, bony fish, and fish eggs. Large schools of leopard sharks are a common sight in bays and estuaries, swimming over sandy or muddy flats or rock-strewn areas near kelp beds and reefs. Typically measuring 1.2–1.5 m (3.9–4.9 ft) long, this slender-bodied shark is immediately identifiable by the striking pattern of black saddle-like markings and large spots over its back, from which it derives its common name. It is found along the Pacific coast of North America, from the U.S. The leopard shark ( Triakis semifasciata) is a species of houndshark, in the family Triakidae. ![]()
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