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A perceptual trap is an ecological scenario in which environmental change, typically anthropogenic, leads an organism to avoid an otherwise high-quality habitat. The concept is related to that of an ecological trap , in which environmental change causes preference towards a low-quality habitat.
The basking trap is a floating enclosures with sloping sides and a basking surface. Turtles are able to climb up the sloping sides onto the basking surface, but then when they jump off into the center, they can't get back out. Hoop traps are cylindrical mesh traps with a funnel opening. Hoop traps are submerged and turtles are attracted by bait ...
An Aspidochelone from a French manuscript, c. 1270. J. Paul Getty Museum. According to the tradition of the Physiologus and medieval bestiaries, the aspidochelone is a fabled sea creature, variously described as a large whale or vast sea turtle, and a giant sea monster with huge spines on the ridge of its back.
Although the original aspidochelone was a turtle-island of warmer waters, this was reinvented as a type of whale named aspedo in the Icelandic Physiologus (fragment B, No. 8). [29] [30] [h] In the Icelandic aspedo was described as a whale (hvalr) being mistaken for an island, [33] [34] and as opening its mouth to issue a perfume of sorts to ...
Behavioral sink" is a term invented by ethologist John B. Calhoun to describe a collapse in behavior that can result from overpopulation. The term and concept derive from a series of over-population experiments Calhoun conducted on Norway rats between 1958 and 1962. [ 1 ]
Fastitocalon was at the surface for long enough for vegetation to grow on its back, adding to the illusion that it was an actual island. Fastitocalon was far larger than the largest non-fictional turtle . It is never explained whether the turtle-fish were an actual race in Middle-earth or fictional characters created solely for the poem.