1/18/2024 0 Comments Manta ray stingray difference![]() ![]() (2016) resurrected Bathytoshia for it and the broad stingray, as well as the roughtail stingray. Although long assigned to Dasyatis, recent work by Last et al. He published his account in an 1875 issue of the scientific journal Annals and Magazine of Natural History, in which he named the new species Trygon brevicaudata, derived from the Latin brevis ("short") and cauda ("tail"). The original description of the short-tail stingray was made by Frederick Hutton, curator of the Otago Museum, from a female specimen 1.2 m (3.9 ft) across caught off Dunedin in New Zealand. Because its population does not appear threatened by human activity, the International Union for Conservation of Nature (IUCN) lists it under least concern. It is often caught incidentally by commercial and recreational fisheries throughout its range, usually surviving to be released. The short-tail stingray is not aggressive, but is capable of inflicting a lethal wound with its long, venomous sting. But it is not unheard of for the stingray to give birth to a litter of 15. This species is aplacental viviparous, with the developing embryos sustained by histotroph ("uterine milk") produced by the mother the litter size is six to 10. Both birthing and mating have been documented within the aggregations at Poor Knights. Large aggregations of rays form seasonally at certain locations, such as in the summer at the Poor Knight Islands off New Zealand. It tends to remain within a relatively limited area throughout the year, preferring deeper waters during the winter, and is not known to perform long migrations. The diet of the short-tail stingray consists of invertebrates and bony fishes, including burrowing and midwater species. It is armed with large tubercles and a midline row of large thorns in front of the stinging spine which has the dorsal and ventral fin folds behind. Its tail is usually shorter than the disc and thick at the base. The body can have colors as well as dark grey or black with rows of white spots along each wing. Its plain-colored, diamond-shaped pectoral fin disc is characterized by a lack of dermal denticles even in adults, and white pores beside the head on either side. The largest stingray in the world, this heavy-bodied species can grow upwards of 2.1 m (6.9 ft) across and 350 kg (770 lb) in weight. It is mostly bottom-dwelling in nature and can be found across a range of habitats from estuaries to reefs, but also frequently will swim into open water. It occurs off southern Africa, typically offshore at a depth of 180–480 m (590–1,570 ft), and off southern Australia and New Zealand, from the intertidal zone to a depth of 156 m (512 ft). The short-tail stingray or smooth stingray ( Bathytoshia brevicaudata) is a common species of stingray in the family Dasyatidae. ![]()
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