theangryangler
03-02-2011, 07:53 AM
Hi all was doin some surfin when i came across this article- The Australian Shark Assesment Report. Now I often read of the sharks taking a battering from "finners" However this report claims that some larger sharks caught by commercial and rec fishos often appear to be fine upon release but die later on.......
The handling practices of sharks caught and returned to the sea may also have the potential to cause cryptic mortality through a condition referred to as hemiplegia, that is, partial paralysis. Large sharks that are brought on board a vessel and returned to the water (eg on trawlers) are mostly returned via a noose around the tail which drags and suspends the shark. Due to the structure of the
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spine and the large cartilaginous sheets associated with the dorsal fin a fracture can occur posterior to the dorsal fin. Deformity of the spine and subsequent overgrowth of cartilage in the region may then slowly destroy the spinal cord, resulting in hemiplegia. Even though sharks handled in this manner behave normally on return to the water, any such damage may lead to hemiplegia and eventually death, due to inability to capture prey and/or compete with other animals (pers comm Butcher, World Wide Fund for Nature Australia 2001).
SOURCE- http://www.daff.gov.au/__data/assets/pdf_file/0019/681013/shark-assess-report.pdf
They are big and bite but still need to be conserved as hey are a vital part of the eco-system. NO SHARKS NO FISH!!!!!
Thanks ANGry
The handling practices of sharks caught and returned to the sea may also have the potential to cause cryptic mortality through a condition referred to as hemiplegia, that is, partial paralysis. Large sharks that are brought on board a vessel and returned to the water (eg on trawlers) are mostly returned via a noose around the tail which drags and suspends the shark. Due to the structure of the
32
spine and the large cartilaginous sheets associated with the dorsal fin a fracture can occur posterior to the dorsal fin. Deformity of the spine and subsequent overgrowth of cartilage in the region may then slowly destroy the spinal cord, resulting in hemiplegia. Even though sharks handled in this manner behave normally on return to the water, any such damage may lead to hemiplegia and eventually death, due to inability to capture prey and/or compete with other animals (pers comm Butcher, World Wide Fund for Nature Australia 2001).
SOURCE- http://www.daff.gov.au/__data/assets/pdf_file/0019/681013/shark-assess-report.pdf
They are big and bite but still need to be conserved as hey are a vital part of the eco-system. NO SHARKS NO FISH!!!!!
Thanks ANGry