John,
Economic incentive does usually drive "progress". Otherwise you need an inquisitive amateur. Anyone willing to mark the shells of all live horse conchs that can be found in a fairly large area, release them back to the same area and find them again next year? After a few years of this, we would have some data. A bit more difficult would be to mark babies or to corral them...
Allen Aigen
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-- John Timmerman <[log in to unmask]> wrote:
Horse conchs are quite
plentiful and are the T-Rex of the mollusks - they attack and
eat most (all?) other mollusks, including depleted species such
as S. gigas. That's how they get so big.