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The effects of parasitism by the rhizocephalan, Briarosaccus callosus Boschma on the lithodid crab, Paralomis granulosa (Jacquinot) in the Falkland Islands


, : The effects of parasitism by the rhizocephalan, Briarosaccus callosus Boschma on the lithodid crab, Paralomis granulosa (Jacquinot) in the Falkland Islands. Crustaceana (Leiden): 592: 156-170

The Rhizocephalan parasite Briarosaccus-callosus has been observed infesting a stock of Lithodidae Paralomis-granulosa from the Falkland Islands with a frequency of less than 1%. Infestation is detected through scarring or the presence of the parasite's reproductive sac or "externa". Crabs with externae are significantly more frequent and males of this category are of small size. Castration of hosts of both sexes by the parasite has been observed both during and after the infestation period. All parasitized females with externae or scars were non-ovigerous. Infested males did not attain morphological maturity as noted by relative claw size. For any given size, males with externae had claws smaller than those of juvenile males. As a result of parasitic feminization, relative claw dimensions of parasitized males were the same as those of unhurt females. After loss of the parasite, scarred males regain claw dimensions similar to those of juvenile males, or in some cases, achieve claw sizes which normally occur at maturity.

Accession: 002249371

DOI: 10.2307/20104590

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Related references

Hoggarth D.D., 1990: The effects of parasitism by the rhizocephalan briarosaccus callosus boschma on the lithodid crab paralomis granulosa jacquinot in the falkland islands south atlantic ocean. The Rhizocephalan parasite Briarosaccus-callosus has been observed infesting a stock of Lithodidae Paralomis-granulosa from the Falkland Islands with a frequency of less than 1%. Infestation is detected through scarring or the presence of the para...

Yu. N.Poltev, 2008: Parasitism of the rhizocephalan Briarosaccus callosus on the crab Paralomis verrilli (Crustacea: Lithodidae) in the waters of southeast Sakhalin. Russian Journal of Marine Biology 34(3): 159-165

Sloan, NA., 1984: Incidence and effects of parasitism by the rhizocephalan barnacle, Briarosaccus callosus Boschma, in the golden king crab, Lithodes aequispina Benedict, from deep fjords in northern British Columbia, Canada. In the extremities of a deep northern British Columbia fjord system 40.5% of 3045 golden king crabs L. aequispina Benedict were parasitized by the rhizocephalan barnacle B. callosus Boschma. Parasitized Lithodes behave like unparasitized brooding...

Hoggarth, Daniel D., 1993: The life history of the lithodid crab, Paralomis granulosa, in the Falkland Islands. The life history of the lithodid crab, Paralomis granulosa, is investigated from a 16-month time series of commercial catches and scientific samples from the Falkland Islands, in the South Atlantic. The mean size at morphological maturity of male...

Boschma, H.; Haynes, E., 1969: Occurrence of the rhizocephalan Briarosaccus callosus Boschma in the king crab Paralithodes camtschatica (Tilesius) in the north east Pacific Ocean. Crustaceana, 16: 97-98

Hawkes, CR.; Meyers, TR.; Shirley, TC., 1985: Parasitism of the blue king crab, Paralithodes platypus, by the rhizocephalan, Briarosaccus callosus. Journal of Invertebrate Pathology, 452: 249-251

Sloan N.A., 1984: Incidence and effects of parasitism by the rhizocephalan barnacle briarosaccus callosus in the golden king crab lithodes aequispina from deep fjords in northern british columbia canada. In the extremities of a deep northern British Columbia fjord system 40.5% of 3045 golden king crabs L. aequispina Benedict were parasitized by the rhizocephalan barnacle B. callosus Boschma. Parasitized Lithodes behave like unparasitized brooding...

Hawkes, C.R.; Meyers, T.R.; Shirley, T.C., 1987: Growth of Alaskan blue king crabs, Paralithodes platypus Brandt, parasitized by the rhizocephalan Briarosaccus callosus Boschma. In this report the authors have examined growth in the laboratory of Paralithodes platypus parasitized by Briarosaccus callosus and compare absorption efficiency, number of crabs which molted, molting success, relative molt increment and body weig...

Pohle, Gerhard W., 1992: First Canadian record of Paralomis bouvieri Hansen, 1908 , infected by the rhizocephalan Briarosaccus callosus and carrying a hyperparasitic cryptoniscinid isopod. The stone crab Paralomis bouvierei is reported for the first time for Canadian Atlantic waters. Combined records now indicate a continuous boreal circum-Atlantic distribution. This is also the first documentation of the rhizocephalan parasite Bria...

Hawkes, C.; Meyers, T.; Shirley, T., 1986: Length-weight relationships of blue, Paralithodes platypus, and golden, Lithodes aequispina, king crabs parasitized by the rhizocephalan, Briarosaccus callosus Boschma. U S Fish and Wildlife Service Fishery Bulletin 84(2): 327-332