نتایج جستجو برای: holothuria
تعداد نتایج: 636 فیلتر نتایج به سال:
Several species of sea cucumbers, all belonging to a single family, possess a peculiar and specialized defense system, the Cuvierian tubules. It is mobilized when the animal is mechanically stimulated, resulting in the discharge of a few white filaments, the tubules. In seawater, the expelled tubules lengthen considerably and become sticky upon contact with any object. The adhesiveness of their...
Despite their soft body and slow motion, sea cucumbers present a low predation rate, reflecting the presence of efficient defence systems. For instance, members of the family Holothuriidae rely on Cuvierian tubules for their defence. These tubules are normally stored in the posterior coelomic cavity of the animal, but when the sea cucumber is threatened by a potential predator, they are expelle...
The sea cucumber Holothuria arguinensis (Koehler and Vaney, 1906) presents an increasing commercial value in Asian markets its exportation depends exclusively on wild stock harvesting. Production through aquaculture has been acknowledged as alternative to supply demand reduce pressure natural stocks, but there are still bottlenecks overcome, such low growth rate survival. This study focuses the...
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