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Range and habitat The Nile tilapia is native to larger parts of Africa , except Maghreb and almost all of Southern Africa . It is native to tropical West Africa , the Lake Chad basin, and much of the Nile system, including lakes Tana , Albert and Edward – George , as well as lakes Kivu , Tanganyika , and Turkana , and the Awash and Omo Rivers .
Larvae metamorphose into fry and become benthic-feeding juveniles that are opportunistically herbivorous, detritivorous, or omnivorous, depending on the predominant food types in the habitat. [16] Juvenile milkfish larger than 20 mm (0.79 in) typically bear the characteristics of adults.
Jack mackerel caught by a Chilean purse seiner Fishing down the food web. Overfishing is the removal of a species of fish (i.e. fishing) from a body of water at a rate greater than that the species can replenish its population naturally (i.e. the overexploitation of the fishery's existing fish stock), resulting in the species becoming increasingly underpopulated in that area.
There is a dispute based on the taxonomy of the sailfish, and either one or two species have been recognized. [3] [4] No differences have been found in mtDNA, morphometrics or meristics between the two supposed species and most authorities now only recognize a single species, Istiophorus platypterus, found in warmer oceans around the world.
In Malaysia, the reason for its other common local name, translated to "The Sultan Fish" is attributed to the claim that the fish was a favorite among royal members and that palace workers would go to markets and call for any fishermen that had the Sultan's fish.
Dunaliella is a single-celled, photosynthetic green alga, that is characteristic for its ability to outcompete other organisms and thrive in hypersaline environments. [1] It is mostly a marine organism, though there are a few freshwater species that tend to be more rare. [2]
Yellowtail scad (ikan selar) in Malaysia. The yellowtail scad is widely distributed in the tropical and subtropical regions of the Indo-Pacific region. [ 4 ] In the Indian Ocean , the species is known from as far south as South Africa , distributed north along the east African coast including Madagascar , and further north to the Persian Gulf ...
An example of the ecological or habitat differences that impede the meeting of potential pairs occurs in two fish species of the family Gasterosteidae (sticklebacks). One species lives all year round in fresh water, mainly in small streams. The other species lives in the sea during winter, but in spring and summer individuals migrate to river ...