Distribution Whale Shark | whale shark ningaloo reef

Distribution Whale Shark | whale shark ningaloo reef

Distribution and habitat

 

The whale shark inhabits most tropical and warm-temperate seas. The fish is largely pelagic, living in the open up sea but not in the better depths of the ocean, even though it is known to occasionally dive to depths of as much as one particular, 800 metres (5, 900 ft).|17| Temporary feeding aggregations occur by several coastal sites including the southern and eastern regions of South Africa; Saint Helena Area in the South Atlantic Sea; Gulf of Tadjoura in Djibouti, Gladden Spit in Belize; Ningaloo Reef in Western Australia; Kerala|18|, Lakshadweep, Gulf of Kutch and Saurashtra coast of Gujarat in India;|19| Útila in Honduras; Southern Leyte; Donsol, Pasacao and Batangas in the Dubai; off Isla Mujeres and Isla Holbox in Yucatan and Bahía de los Ángeles in Baja California, México; Maamigili island, Maldives; Ujung Kulon National Park in Indonesia; Cenderawasih Bay Country specific Park in Nabire, Papua, Indonesia; Flores Island, Dalam negri; Nosy Be in Madagascar; away Tofo Beach near Inhambane in Mozambique; the Tanzanian islands of Mafia, Pemba, Zanzibar; Gulf of Tadjoura in Djibouti, the Advertising Dimaniyat Islands in the Gulf of mexico of Oman and 's Hallaniyat islands in the Arabian Sea; and, very rarely, Eilat, Israel and Aqaba, The nike jordan. Although typically seen just offshore, it has been found closer to area, entering lagoons or coral atolls, and near the lips of estuaries and waters. Its range is generally restricted to about 30° latitude. It truly is capable of diving to depths of at least 1, 286 m (4, 219 ft),|20| and is migratory.|9| On 7 February 2012, a large whale shark was found floating 150 kms (93 mi) off the shoreline of Karachi, Pakistan. The size of the specimen was said to be between 11 and doze m (36 and 39 ft), with a weight of around 15, 000 kilogram (33, 000 lb).|21|

 

 

 

In 2011, more than 400 whale sharks gathered off the Yucatan Coast. It was one of the largest gatherings of whale fishes recorded.|22| Aggregations in that area are one of the most reliable seasonal gatherings reputed for whale sharks, with vast quantities occurring in most years between May and September. Linked ecotourism has grown rapidly to unsustainable levels.|23|

Neither of them mating nor pupping of whale sharks has been observed.

 

The capture of a girl in July 1996 that was pregnant with 300 pups indicated whale fishes are ovoviviparous.|9||24||25| The ovum remain in the body and the females give birth to live adolescent which are 40 to 60 cm (16 to twenty-four in) long. Evidence indicates the pups are not almost all born at once, but rather the feminine retains sperm from one pairing and produces a steady stream of pups over a extended period.|26| That they reach sexual maturity at around 30 years and their life-span is an estimated 70|9| to 100 years.|27|

 

On 7 March 2009, marine scientists in the Dubai discovered what is believed to be the smallest living specimen of the whale shark. The young shark, measuring only 38 centimeter (15 in), was identified with its tail tied to a stake at a shore in Pilar, Sorsogon, Thailand, and was released into the untamed. Based on this discovery, a lot of scientists no longer believe this area is just a feeding ground; this great site may be a birthing earth, as well. Both young whale sharks and pregnant females have been seen in the seas of Saint Helena in the South Atlantic Ocean, wherever numerous whale sharks can be spotted during the summer.

The whale shark is a filtration system feeder - one of simply three known filter-feeding shark species (along with the basking shark and the megamouth shark). It feeds on plankton including copepods, krill, seafood eggs, Christmas Island crimson crab larvae |30| and small nektonic life, such as small squid or fish. It also passes on clouds of eggs during mass spawning of fish and corals.|31| The many rows of vestigial teeth play no role in feeding. Feeding arises either by ram purification, in which the animal opens the mouth and swims forwards, pushing water and food into the mouth, or by lively suction feeding, in which the creature opens and closes its mouth, sucking in quantities of water that are then simply expelled through the gills. In both cases, the filtration system pads serve to separate foodstuff from water. These exceptional, black sieve-like structures happen to be presumed to be modified gill rakers. Food separation in whale sharks is by cross-flow filtration, in which the water moves nearly parallel to the filtration pad surface, not perpendicularly through it, before driving to the outside, while denser food particles continue to the back in the throat.|32| That is an extremely efficient filtration technique that minimizes fouling in the filter pad surface. Whale sharks have been observed "coughing", presumably to clear a build-up of particles from the filtration system pads. Whale sharks move to feed and possibly to reproduce.

2019-01-22 17:01:07 * 2019-01-20 07:43:08