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Abstract:

A total of 16,692 specimens of Paralomis granulosa was collected in the Beagle Channel. Tierra del Fuego, Argentina, between July 1996 and July 1997. This lithodid was parasitized by a bopyrid isopod identified as Pseudione tuberculata. Infested crabs exhibited a conspicuous bulge on their carapaces, which accommodated the parasite housed in the branchial chamber. The prevalence of infestation by P. tuberculata decreased with crab size, from 45.6% at 10-19.9-mm to 0% at 90-99.9-mm carapace length. Bopyrids were found on 251 occasions in the left branchial chamber and only once in the right branchial chamber. Except for two immature female parasites found in the branchial chamber of a small crab, all parasites were mature females, each usually carrying a dwarf male attached to its abdomen. The length of the female isopods and that of their hosts were positively correlated. These two observations suggest that the parasites infest P. granulosa early in the life of the host, and remain on, and grow up with the host throughout its life. The finding of crabs without bopyrids, but with distended branchial chambers, shows that some crabs survive the infestation. While breeding is inhibited in parasitized hosts, the prevalence of the parasite is already low (about 1.2%) at the size of host maturity. Therefore, we suggest that the reproductive potential of the crab population is not seriously affected by the sterilizing effect of the parasite. Finally, the cooccurrence of this bopyrid and a second parasite, the rhizocephalan Briarosaccus callosus, was recorded, but the prevalence of double infestations was low.

Registro:

Documento: Artículo
Título:Infestation of the false king crab Paralomis granulosa (Decapoda: Lithodidae) by Pseudione tuberculata (Isopoda: Bopyridae) in the Beagle Channel, Argentina
Autor:Roccatagliata, D.; Lovrich, G.A.
Filiación:Fac. de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, (1428) Buenos Aires, Argentina
Centro Austral de Invest. Cie., CC92, (9410) Ushuaia, Tierra del Fuego, Argentina
Palabras clave:Paralomis granulosa; Pseudione tuberculata
Año:1999
Volumen:19
Número:4
Página de inicio:720
Página de fin:729
Título revista:Journal of Crustacean Biology
Título revista abreviado:J. Crustacean Biol.
ISSN:02780372
CODEN:JCBID
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02780372_v19_n4_p720_Roccatagliata

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Citas:

---------- APA ----------
Roccatagliata, D. & Lovrich, G.A. (1999) . Infestation of the false king crab Paralomis granulosa (Decapoda: Lithodidae) by Pseudione tuberculata (Isopoda: Bopyridae) in the Beagle Channel, Argentina. Journal of Crustacean Biology, 19(4), 720-729.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02780372_v19_n4_p720_Roccatagliata [ ]
---------- CHICAGO ----------
Roccatagliata, D., Lovrich, G.A. "Infestation of the false king crab Paralomis granulosa (Decapoda: Lithodidae) by Pseudione tuberculata (Isopoda: Bopyridae) in the Beagle Channel, Argentina" . Journal of Crustacean Biology 19, no. 4 (1999) : 720-729.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02780372_v19_n4_p720_Roccatagliata [ ]
---------- MLA ----------
Roccatagliata, D., Lovrich, G.A. "Infestation of the false king crab Paralomis granulosa (Decapoda: Lithodidae) by Pseudione tuberculata (Isopoda: Bopyridae) in the Beagle Channel, Argentina" . Journal of Crustacean Biology, vol. 19, no. 4, 1999, pp. 720-729.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02780372_v19_n4_p720_Roccatagliata [ ]
---------- VANCOUVER ----------
Roccatagliata, D., Lovrich, G.A. Infestation of the false king crab Paralomis granulosa (Decapoda: Lithodidae) by Pseudione tuberculata (Isopoda: Bopyridae) in the Beagle Channel, Argentina. J. Crustacean Biol. 1999;19(4):720-729.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02780372_v19_n4_p720_Roccatagliata [ ]