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Fri 5 Aug, 2005 04:52 am
"To protect great whites we need to know their geographical range and their population structure," said Robert Hueter, who directs the Center for Shark Research at Mote Marine Laboratory in Sarasota, Florida.
geographical range: Is that the range of all great white shark groups or that of one group of great sharks. If the latter is true, is that a comparatively narrower range where sharks live at a short time period or a range that sharks travel when they migrate around the world?
Could you get what I'm thinking?
population structure: Let me describe it, and see if it's true. It is the age, sex, or other factors mixed together to form such a structure. So the structure means to have big sharks and small ones, male sharks and female ones, etc.
geographical range is the movement data that any given shark or small group of sharks, statistically, display. We study individuals and compile statistics on their movements from looking at a lot of individuals , thus developing truths for the larger population.
As far as population structure-youre correct about that understanding. Theres nothing Id add, but maybe others will have some ideas that Im unaware of.
So "geographical range" refers to wherever the sharks travels (worldwide), right?
And what if the sharks belong to defferent groups? In this case, what is "geographical range"? Is it the range of all sharks travels or of the same group of sharks (showed to have the same travelling course)?
well. individual sharks may only have a specific range of a few 10s of miles but , since the species of great whites is found all over the world, yes , the species geographical range is worldwide.
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