Distribution Whale Shark | whale shark near male

Distribution Whale Shark | whale shark near male

Distribution and habitat

 

The whale shark inhabits all tropical and warm-temperate waters. The fish is primarily pelagic, living in the wide open sea but not in the greater depths of the ocean, even though it is known to occasionally dive to depths of as much as you, 800 metres (5, 900 ft).|17| In season feeding aggregations occur for several coastal sites including the southern and eastern parts of South Africa; Saint Helena Isle in the South Atlantic Ocean; 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 Thailand; 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 National Park in Nabire, Papua, Indonesia; Flores Island, Philippines; Nosy Be in Madagascar; off Tofo Beach near Inhambane in Mozambique; the Tanzanian islands of Mafia, Pemba, Zanzibar; Gulf of Tadjoura in Djibouti, the Advertisement Dimaniyat Islands in the Gulf of mexico of Oman and 's Hallaniyat islands in the Arabian Sea; and, very rarely, Eilat, Israel and Aqaba, Jordan. Although typically seen overseas, it has been found closer to property, entering lagoons or coral reefs atolls, and near the teeth of estuaries and estuaries and rivers. Its range is generally limited to about 30° latitude. It really 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 coast of Karachi, Pakistan. The length of the specimen was said to be between 11 and 12 m (36 and 39 ft), with a weight of around 15, 000 kg (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 good sized quantities occurring in most years between May and September. Linked ecotourism has grown rapidly to unsustainable levels.|23|

Not mating nor pupping of whale sharks has been observed.

 

The capture of a woman in July 1996 that was pregnant with 300 pups indicated whale sharks are ovoviviparous.|9||24||25| The eggs remain in the body and the females give birth to live youthful which are 40 to 70 cm (16 to twenty four in) long. Evidence shows the pups are not every born at once, but rather the female retains sperm from one mating and produces a steady stream of pups over a lengthened period.|26| They reach sexual maturity for 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 cm (15 in), was observed with its tail tied to a stake at a beach front 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 web site may be a birthing place, as well. Both young whale sharks and pregnant females have been seen in the seas of Saint Helena inside the South Atlantic Ocean, in which numerous whale sharks can be spotted during the summer.

The whale shark is a filtration feeder - one of just 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 nourishes on clouds of eggs during mass spawning of fish and corals.|31| The many rows of vestigial teeth play no part in feeding. Feeding occurs either by ram purification, in which the animal opens it is mouth and swims forward, pushing water and foodstuff into the mouth, or by lively suction feeding, in which the animal opens and closes their mouth, sucking in volumes of water that are therefore expelled through the gills. In both cases, the filter pads serve to separate food from water. These unique, black sieve-like structures will be presumed to be modified gill rakers. Food separation in whale sharks is by cross-flow filtration, in which the water travels nearly parallel to the filtration system pad surface, not perpendicularly through it, before driving to the outside, while denser food particles continue to the back in the throat.|32| This is an extremely efficient filtration approach that minimizes fouling from the filter pad surface. Whale sharks have been observed "coughing", presumably to clear a build-up of particles from the filter pads. Whale sharks move to feed and possibly to breed.

2019-01-09 21:00:02

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