In: Biology
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In hermit crabs, the fourth and particularly the fifth pereopods are reduced, usually remaining within the confines of the gastropod shell and hence are not used for walking. These appendages do however becoming important when the hermit crab attempts to right itself, providing anchorage within the shell. Further, the fifth pereopod has become specialised as a gill cleaning appendage, often resting within the gill chamber (Bauer 1981). On the abdomen only the left pleopods are retained (Poore 2004).[1] Hermit crabs used specialized setae on the third maixillipedes and fifth pereiopods for most grooming but used the unmodified first, second, and third pereiopods as well. MostRead More →

In: General
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In hermit crabs, the fourth and particularly the fifth pereopods are reduced, usually remaining within the confines of the gastropod shell and hence are not used for walking. These appendages do however becoming important when the hermit crab attempts to right itself, providing anchorage within the shell. Further, the fifth pereopod has become specialised as a gill cleaning appendage, often resting within the gill chamber (Bauer 1981). On the abdomen only the left pleopods are retained (Poore 2004).[1] Hermit crabs used specialized setae on the their maixillipedes and fifth pereiopods for most grooming but used the unmodified first, second, and third periopods as well. MostRead More →

In: Caresheets
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Lost Limbs What is Autotomy? Comes from the latin words autos for “self” and tomos for “cut Autotomy can be described as self-cutting, Websters dictionary describes autotomy as a “reflex separation of a part (as an appendage) from the body: division of the body into two or more pieces.” Hermit Crabs can autotomize (drop) and regenerate (regrow) their limbs from juvenile to adult stages. The break occurs along a fracture plane located at the appendage’s base. Why do land hermit crabs drop limbs? The rate at which the limbs regenerate depends upon the molt cycle (Morgan, 1900; Zeleny, 1908; Bliss, 1960; Skinner 1962, 1985). DuringRead More →