pleopod

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pleopod

[′plē·ə‚päd]
(invertebrate zoology)
An abdominal appendage in certain crustaceans that is modified for swimming.
References in periodicals archive ?
Relative pleopod length as an indicator of size at sexual maturity in slipper (Scyllarides squammosus) and spiny Hawaiian (Palinurus marginatus) lobsters.
The pleopods are similar to those of the type, their exopodites extending considerably beyond the margins of the pleomeres, the subcircular endopodites not covering the central region of the dorsal surface of the pleon.
Remarks: The secondary male differs substantially from the primary male, not just in respect of the typical characters of size and cheliped development, but also as regards the antennule structure, and pleopod setal number (higher in secondary male).
Beginning with specimens collected in 2000, the lengths of exopodites on first pleopods were measured for a representative sample of berried and unberried tails of each species, after the tails were thawed overnight in a refrigerator at 3[degrees]C.
The form of the male pleopod in this specimen was essentially the same as that seen in specimens in Zimmerman's collection from several other sites.
In the present study, what was described by Berkeley (1930) as the fifth stage larva turned out to be the sixth stage because the larvae of this stage have fully developed pleopods.
The length and height of the propodus of the largest cheliped, the length of the merus of the second walking leg, and the length of the primary pleopod of each male crab in Cockburn Sound and Shark Bay were measured to the nearest 0.
Last, the female second pleopod length underwent positive allometry throughout ontogeny, and the data indicate the existence of a single growth phase.
All four pairs of egg-bearing pleopods were then removed from the abdomen, gently blotted (damp-dry) on a paper towel, and weighed individually to 0.
Fecundity in spiny lobsters is often defined as the number of eggs carried externally on the pleopods of a female.
Fertilization success without anterior pleopods in shrimp Lysmata wurdemanni, a protandric simultaneous hermaphrodite (Crustacea: Decapoda: Caridea).