Q. With respect to the Horseshoe crabs, consider the following statements:
- In India, their breeding ground is along the Gujarat coast.
- Their blood contains hemocyanin which has copper in it.
- Their blood contains a special clotting agent limulus amebocyte lysate (LAL) which detects a contaminant called endotoxin.
Which of the statements given above is/are correct?
Answer:
Only 2 & 3
Notes:
- Horseshoe crabs are one of oldest living creatures on the earth. These crabs are basically deep sea animals.
- The creature has lived on earth for about 450 million years without undergoing any morphological change.
- India one of the major breeding ground and maximum density of Horseshoe crabs is found along the Odisha coast. They come to coasts of Balasore in Odisha and Digha and Sundarban in West Bengal for breeding purposes.
- Their spawning activities are affected due to unregulated fishing activities.
- These crab’s blood is blue in colour due to a different oxygen-carrying protein, called hemocyanin which has copper (human blood has haemoglobin which has iron that gives red colour to our blood).
- Horseshoe crab’s blood contains a special clotting agent limulus amebocyte lysate (LAL) which detects a contaminant called endotoxin.
- These crabs are medicinally priceless and are used to test vaccines, drugs and medical devices.
- Their blood is used to ensure that vaccines aren’t contaminated with endotoxins.
- These are conserved under Wildlife Protection Act 1972 - Schedule IV.