The Blind Cave Fish life in the Gunung Kidul
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| Synonyms And Synonyms |
Gunungkidul - must have been a lot of us who have heard the name. The name is a county located in the eastern region of Yogyakarta Special Region. Behind the hills of vast quantities (so that there is a region called by the name of the mountain also sewu) - which in the dry season - looks barren, it stores information in a very unique and scientifically valuable.
Cave - Under these hills there are many caves and underground streams. In this place was one of the stored wealth of biodiversity, and only a few people who had the opportunity to witness such property. In one of the caves are located in the southern city of Wonosari (the district capital - ed) there is a cave. Inside the cave at a depth of approximately 220 meters from the ground surface there is a "lake". (by reason of cave conservation is not the author's name mentioned in this article).
Underground lake - the lake in this cave varying depths around 80-10 meters. The surface area of the cave over a quarter of the lack of a football field. light intensity around the cave in total darkness 0 lux, quite humid, rainy season floods the cave often.
Cave fish - In the lake there are many fish cave. First time writer in 1991 entered the cave and it was a lot of fish found in many caves. In 1998 when the writer came back, having gained identified three types of fish.
There's so special about the fish that live in the cave. First - by looking at his age (of the otolith method) after compared with similar fish that live outside the cave, cave fish body size is much smaller. Just the same age of 1.5 years is only half the size of the cave fish of similar fish that live outside the cave. Second - the color pink cave fish's body. Third - sudag cave fish eye does not function to see and be blind.
Cave - Under these hills there are many caves and underground streams. In this place was one of the stored wealth of biodiversity, and only a few people who had the opportunity to witness such property. In one of the caves are located in the southern city of Wonosari (the district capital - ed) there is a cave. Inside the cave at a depth of approximately 220 meters from the ground surface there is a "lake". (by reason of cave conservation is not the author's name mentioned in this article).
Underground lake - the lake in this cave varying depths around 80-10 meters. The surface area of the cave over a quarter of the lack of a football field. light intensity around the cave in total darkness 0 lux, quite humid, rainy season floods the cave often.
Cave fish - In the lake there are many fish cave. First time writer in 1991 entered the cave and it was a lot of fish found in many caves. In 1998 when the writer came back, having gained identified three types of fish.
There's so special about the fish that live in the cave. First - by looking at his age (of the otolith method) after compared with similar fish that live outside the cave, cave fish body size is much smaller. Just the same age of 1.5 years is only half the size of the cave fish of similar fish that live outside the cave. Second - the color pink cave fish's body. Third - sudag cave fish eye does not function to see and be blind.
Why the blind cave fish?
If the cave fish could answer our questions, maybe he will answer - well what's the point my eyes could see, anyway do not function. in the cave's total darkness, so I also can not see what's what. - But unfortunately the fish I can not answer so it won, he can not talk .....
From the standpoint of biological sciences, there is a strong correlation between structure and function of organs in living things. if an organ is not enabled then the organ will also be reduced. likewise, if an organ to reduce the function is also reduced.
If the cave fish could answer our questions, maybe he will answer - well what's the point my eyes could see, anyway do not function. in the cave's total darkness, so I also can not see what's what. - But unfortunately the fish I can not answer so it won, he can not talk .....
From the standpoint of biological sciences, there is a strong correlation between structure and function of organs in living things. if an organ is not enabled then the organ will also be reduced. likewise, if an organ to reduce the function is also reduced.
Likewise, in the eyes of cave fish.
Inside the cave is completely dark cave fish eye does not function at all to see. That's because it does not work then the organs eyes will also experience degeneration. To be able to see, one of the important structures within the eye is the rod cells and cone cells. If both cells are not there then that organ does not function as an organ of vision.
In the cave fish, it turns out after the incision was observed and made rod and cone cells is reduced. even extremely reduced, and left only a remnant of the rest alone. For this reason, certain that the cave fish could not see or blind....
Inside the cave is completely dark cave fish eye does not function at all to see. That's because it does not work then the organs eyes will also experience degeneration. To be able to see, one of the important structures within the eye is the rod cells and cone cells. If both cells are not there then that organ does not function as an organ of vision.
In the cave fish, it turns out after the incision was observed and made rod and cone cells is reduced. even extremely reduced, and left only a remnant of the rest alone. For this reason, certain that the cave fish could not see or blind....
But for the cave fish, being blind is not something that is harmful, yet if the eye is normal also does not work right. In general, to survive the fish will try to adjust to the environment in the best way possible. This is what happened to the blind fish. Compensation of the condition of the blind cave fish is the increased ability to detect changes in their environment - especially changes in water pressure - with the development of the linea lateralis system. This system is used when we were elementary school teachers are often introduced by us with the name of the lateral line.
From observations made, the system line laterals cave fish is much more developed than that owned by the fish that live outside the cave. With a highly developed system, the cave fish become very sensitive, making it easy to distinguish the arrival of food or predators, or just a disturbance in the water.
That's a quick explanation of why the cave fish have several generations living in a cave then his eyes became blind, as well as an explanation for why the fish can still live and breed in conditions that we think is very extreme.
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