Observations on Portland Inlet system, northern British Columbia golden king crabs (Lithodes aequispina) and their infestation by a rhizocephalan barnacle parasite (Briarosaccus callosus) / by N.A. Sloan.: Fs97-4/1779E-PDF

"From three deep-water fjords in the Portland Inlet system, northern British Columbia, 1396 golden king crabs (Lithodes aequispina) suffered 36.7% infestation by the rhizocephalan barnacle parasite Briarosaccus callosus in October-November, 1983. The 72 red king crabs (Paralithodes camtschatica) and the 782 Tanner crabs (Chionoecetes bairdi) coincidentally sampled in the 169 single king crab pot sets were unpartized. Alice and Hastings Arms golden king crabs suffered similar (38.4-39.7%) parasitism levels whereas Observatory Inlet crabs were only 2.9% parasitized. Portland Inlet yielded only two (unparasitized) L. aequispina and Work Channel none. In all fjords 38.9% of males and 34.8% of females were parasitized. Other aspects covered are: host abundance, between and within fjord differences of parasitized or unparasitized hosts and reproductive status of unparasitized female L. aequispina. Relatively high L. aequispina populations and infestation levels of B. callosus in the extremities of the Portland Inlet system are related to the deep-water habitat preferences of the crabs and the oceanographic isolation of the fjords. A literature survey on what little is known about the biology of L. aequispina is provided"--Abstract, page iv.

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