Animalscaretips
It is your genes that determine which traits you inherit. ... The genes in cave fishes work the same way. The fact that cave fishes don't use their eyes has no effect on their genes. Instead, cave fishes are blind because something happened to the genes that control the development of their eyes.
- Why do cave dwelling animals possess sightless eyes?
- Why do blind cave salamanders have any eye structure?
- How did cave fish lose their eyes?
- Why is the eyesight of cave fish not important adaptation to life in a cave?
- Why are cavefish blind?
- What is the evolutionary significance of eye sockets in blind cave tetras?
- Does the OLM have eyes?
- Is the OLM real?
- Are Axolotl and OLM related?
- How do cavefish see?
- Can a fish go blind?
- Are cave fish and minnow common ancestry?
- Which adaptation would you expect in animals that live in caves?
- What is the most important adaptation of a cave fish?
- What do you think has become the most important adaptation of the cave fish think about senses )? Explain your answer?
Why do cave dwelling animals possess sightless eyes?
Few animals have ignored the warning “use it or lose it” as spectacularly as the Mexican blind cavefish (Astyanax mexicanus), which no longer has eyes. ... With food so scarce in caves, the animals have to save their energy—and being sightless gives them a major boost, according to a team from Sweden's Lund University.
Why do blind cave salamanders have any eye structure?
Because of the complete lack of sunlight in the dark zone where they reside, cave salamanders have developed several adaptations to their environment, including blindness. Even creatures with fully-functioning eyes would find themselves unable to see in this environment.
How did cave fish lose their eyes?
Blind cavefish (Astyanax mexicanus) lose critical eye tissues within a few days after their eyes begin to develop. According to a new study, this loss of eye tissues happens through epigenetic silencing of eye-related genes.
Why is the eyesight of cave fish not important adaptation to life in a cave?
Explain why eyesight is not an important adaptation to life in a cave. There is NO light in a cave. All living things need light to see. Eyesight is not a sense that the cave fish can use in darkness.
Why are cavefish blind?
The fact that cave fishes don't use their eyes has no effect on their genes. Instead, cave fishes are blind because something happened to the genes that control the development of their eyes. This change is passed on from parent to offspring. That explains why a blind fish would have blind offspring.
What is the evolutionary significance of eye sockets in blind cave tetras?
Over the past few million years, blind forms of the Mexican tetra (Astyanax mexicanus) have evolved in caves. Maintaining eyes and the visual parts of the brain uses lots of energy, so the loss of eyes is a big advantage for animals living in the dark.
Does the OLM have eyes?
The olm (Proteus anguinus), or cave salamander, is a type of amphibian that lives in central and southeastern Europe. Having adapted to live in dark, wet caves, olms lack pigment in their bodies, making them appear milky white, and are blind, thanks to poorly developed eyes.
Is the OLM real?
The olm or proteus (Proteus anguinus) is an aquatic salamander in the family Proteidae, the only exclusively cave-dwelling chordate species found in Europe. In contrast to most amphibians, it is entirely aquatic; it eats, sleeps, and breeds underwater.
Are Axolotl and OLM related?
They may seem somewhat similar in appearance, yet are unrelated and in fact, natively occur on two different continents. The Olm calls Middle Europe home, while the Axolotl is based in South America. Generally white to pinkish in colour, they are also known in dark to almost back mutations.
How do cavefish see?
The Mexican blind cavefish does not have eyes, but it can "see" obstacles in dark caves by puckering its mouth and producing bursts of suction, according to a new study. In fact, larger fish detected objects at about the same distance as smaller fish did. ...
Can a fish go blind?
Cataracts: Fishes can also suffer from cataracts, which is a common eye disorder causing the eye lens to become opaque. Cataracts can be due to nutritional imbalance, parasitic infection, and other genetic or unknown factors. ... The fish will generally become blind in the infected eye, and it may develop a cataract, too.
Are cave fish and minnow common ancestry?
The appearance of the cavefish and the minnow suggests a common ancestry since they possess homologous structures. Based on observations made on the characteristics of the cavefish and minnow, the structures of the fins, tails, and overall shape of the bodies make the two types of fish seem exceedingly related.
Which adaptation would you expect in animals that live in caves?
Typical adaptations seen among animals that live exclusively in caves include: Lack of pigmentation. Reduction in the size of eyes (or absence of eyes altogether) Development of sensory mechanisms that do not depend on light for detecting food or predators.
What is the most important adaptation of a cave fish?
Cavefish are members of a wide range of families and do not form a monophyletic group. Typical adaptations found in cavefish are reduced eyes and pigmentation.
What do you think has become the most important adaptation of the cave fish think about senses )? Explain your answer?
The lateral lines are enhanced by structures called neuromasts, specialized hair cells running along the lateral line to enhance sensory abilities. Cavefish rely heavily on vibration attraction behavior to sense the location of potential prey, and will move towards vibrations in the water.
