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Glossogobius ankaranensis és una espècie de peix de la família dels gòbids i de l'ordre dels perciformes.
Els mascles poden assolir els 5,1 cm de longitud total.[3][4]
Es troba a Madagascar.[3]
Glossogobius ankaranensis és una espècie de peix de la família dels gòbids i de l'ordre dels perciformes.
Glossogobius ankaranensis is a species of fish in the family Gobiidae. This cavefish is endemic to the Ankarana Reserve in Madagascar. Its natural habitat is inland karsts.
The Ankarana Mountain Range, formed by middle Jurassic sedimentary rock, is located in northern Madagascar, and its highest mountain is about 300 m (980 ft) above sea level.[2] Several trees grow in the mountains' canyons and downfallen caves. Evergreen trees especially have an advantage due to the waters from a system of rivers that flows through the caves.[2] Two important rivers enter the mountain range, the Andranotsisiloha and the Besaboba. These rivers are perennial and provide essential nutrients and habitat for an immense amount of organisms such as G. ankaranensis.[2] This species was found in the Second River Cave. The only approachable section of the Second Cave River is 150 m (490 ft) long and the deepest point is 2 m (6.6 ft) with a width of 5 m (16 ft). The water temperature benefits all organisms it houses because it oscillates around 21 °C (70 °F).[2]
Several physical characteristics distinguish this species from others that live in the region. The lack of pigmentation causes this fish to look pink in color; its blood and internal organs are visible through the scales.[2] Several rows of teeth are accommodated by a big mouth and thick lips. Another factor that helps accommodate the quantity of teeth is the fact that the lower jaws protrude further than the upper jaws.[2] G. ankaranensis is not light sensitive because little to no sunlight reaches the waters in which this species lives.[2] The lengths of these fish typically vary from about 4 to 7 cm (1.6–2.8 in), and they move around slowly with their mouths closed.[2]
Food is very abundant in these caves, which apparently keeps the population of these fishes stable.[2] Some of the species that serve as food for G. ankaranensis are shrimps, insects, and wastes from other animals and the environment.[2]
The discovery of G. ankaranensis was purely accidental. Two trips were performed by several scientists to the Ankarana Mountain Range.[2] The first trip was in 1981 and its mission was to explore the wild life of the Ankarana mountains and rivers.[2] During this trip, several new species of cave-adapted shrimps stood out to scientists and they decided to come back again. In 1986, much more attention was devoted to cave-adapted species. The new species G. ankaranensis, a white and blind fish, was found in the Second River Cave.[2]
These fish are blind; no ocular tissue is found in their eye sockets except for a little black spot in each of the eyes.[2] An increase in predation when G. ankaranensis is exposed to UV light might be due to the lack of eyes and pigments.[3] Pigments are necessary when G. ankaranensis is exposed to UV light because they deflect UV light.[3]
Neuromasts (sensory papillae or pit organs) are interesting adaptations that this species of fish have developed to deal with reduced vision.[4] These structures are not clustered in only one section of the individual's body but widely distributed. Six rows of neuromasts are located on the cheeks as well as the trunk of Glossogobius. Other rows of neuromasts can be found on the dorsolateral and ventrolateral series.[4] G. ankaranensis dark-adapted lifestyle can be supported by the widespread presence of neuromasts along the species body.[4]
Despite its small range, G. ankaranensis is not considered threatened, as it lives entirely within the Ankarana Reserve in an isolated region that is not subjected to human changes (in part because of a local fady) and its population is relatively stable.[1] Annual floods can be important because much food can be derived from them, but floods can drastically diminish the fish population living in the caves of the Ankarana Reserve.[2] Though G. ankaranensis is generally dispersed among the caves of the Ankarana Mountain Range, the mountain range is very small (28 X 8 km at its widest region).[2]
Glossogobius ankaranensis is a species of fish in the family Gobiidae. This cavefish is endemic to the Ankarana Reserve in Madagascar. Its natural habitat is inland karsts.
Glossogobius ankaranensis es una especie de peces de la familia de los Gobiidae en el orden de los Perciformes.
Los machos pueden llegar alcanzar los 5,1 cm de longitud total.[2][3]
Se encuentra en Madagascar.
Es inofensivo para los humanos.
Glossogobius ankaranensis es una especie de peces de la familia de los Gobiidae en el orden de los Perciformes.
Glossogobius ankaranensis Glossogobius generoko animalia da. Arrainen barruko Actinopterygii klasean sailkatzen da, Gobiidae familian.
Glossogobius ankaranensis Glossogobius generoko animalia da. Arrainen barruko Actinopterygii klasean sailkatzen da, Gobiidae familian.
Glossogobius ankaranensis is een straalvinnige vissensoort uit de familie van de grondels (Gobiidae).[1] De wetenschappelijke naam van de soort is voor het eerst geldig gepubliceerd in 1994 door Banister.
Bronnen, noten en/of referenties
Glossogobius ankaranensis é uma espécie de peixe da família Gobiidae.[1]
É endémica de Madagáscar.[1]
Os seus habitats naturais são: sistemas cársticos interiores.[1]
Glossogobius ankaranensis é uma espécie de peixe da família Gobiidae.
É endémica de Madagáscar.
Os seus habitats naturais são: sistemas cársticos interiores.
Glossogobius ankaranensis là một loài cá thuộc họ Gobiidae. Nó là loài đặc hữu của Madagascar. Môi trường sống tự nhiên của chúng là inland karsts.
Bài viết chủ đề bộ Cá bống này vẫn còn sơ khai. Bạn có thể giúp Wikipedia bằng cách mở rộng nội dung để bài được hoàn chỉnh hơn. Glossogobius ankaranensis là một loài cá thuộc họ Gobiidae. Nó là loài đặc hữu của Madagascar. Môi trường sống tự nhiên của chúng là inland karsts.
馬達加斯加叉舌鰕虎魚（学名：Glossogobius ankaranensis），为輻鰭魚綱鱸形目鰕虎亞目鰕虎科叉舌鰕虎魚屬下的一个种，被IUCN列為易危保育類動物，為熱帶淡水魚，分布於非洲馬達加斯加淡水流域，體長可達5.1公分，棲息在洞穴，生活習性不明。
这是一篇與鱸形目相關的小作品。你可以通过编辑或修订扩充其内容。 馬達加斯加叉舌鰕虎魚（学名：Glossogobius ankaranensis），为輻鰭魚綱鱸形目鰕虎亞目鰕虎科叉舌鰕虎魚屬下的一个种，被IUCN列為易危保育類動物，為熱帶淡水魚，分布於非洲馬達加斯加淡水流域，體長可達5.1公分，棲息在洞穴，生活習性不明。
