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Life history relationships between the bopyrid isopod probopyrus pandalicola and 1 of its fresh water shrimp hosts palaemonetes paludosus

Beck, T.J.

American Midland Naturalist 104(1): 135-154

1980


ISSN/ISBN: 0003-0031
Accession: 005808330

Data are provided on the reproduction, attachment, postlarval development and population structure of the parasitic isopod, P. pandalicola, on its shrimp host, P. paludosus, collected monthly for 2 yr from a site in the Wakulla River and a tributary, McBride's Slough, Wakulla County, Florida [USA]. Ovigerous P. pandalicola occurred from Jan.-Oct.; ovigerous hosts occurred only from Jan.-Sept. Blood size, which ranged from 350-11,850 young, increased exponentially with length of the female, and was independent of host sex. Mean brood size and length of ovigerous P. pandalicola increased from late winter to a peak in March. There was a 2nd smaller peak in June with a subsequent decline to low levels for the remainder of the breeding season. Cryptoniscus larvae occurred on shrimp 9-39 mm long from April-Oct. Growth of body width in relation to body length in male and female isopods was positively allometric. The length of female and male parasites was positively correlated with the length of the host and female parasite, respectively. Host and parasite longevity was about 1 yr. Death of the parasite rarely preceded host death. These data are compared with that for other epicaridean isopods, [including Hemiarthrus abdominalis Kroyer, Bopyroides hippolytes (Kroyer), B. ocellata (Bourdon, 1968), B. squillarum, Apopenaeou japonicum, Argeia pugettensis Dana, Gyge branchialis Cornalia et Panceri, Pseudione crenulata Sars, P. hyndmann Bate et Westwood and Pleurocrypta galatheae Hesse].

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