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Artículo

Ontogenetic changes in the external anatomy of the parasitic castrator crab Calyptraeotheres garthi: Implications for the timing of host colonization and sexual behaviour

Ocampo, Emiliano HernanIcon ; Spivak, Eduardo DanielIcon ; Baeza, Antonio J.; Luppi, Tomas AtilioIcon
Fecha de publicación: 27/07/2016
Editorial: Wiley Blackwell Publishing, Inc
Revista: Biological Journal of The Linnean Society
ISSN: 0024-4066
e-ISSN: 1095-8312
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ciencias Biológicas

Resumen

Pea-crabs are symbiotic crustaceans that live in association with a diverse array of macro-invertebrate hosts. Some pea-crabs exhibit an unusual and incompletely known post-larval cycle characterized by the alternation of free-life and symbiotic forms. We analyzed post-larval morphology, the allometry of various body parts, and sexual dimorphism in Calyptraeotheres garthi, an endosymbiotic pea-crab infesting the brooding chamber of limpets in the southwestern Atlantic. In C. garthi, the smallest invasive crab moults into a male or female prehard stage, which is immediately followed by a hard stage. Then, hard-stage females, but not hard-stage males, pass through four post-hard stages before attaining a fifth terminal stage. The invasive and hard stages exhibit morphological traits (plumose natatory setae on the legs, compressed body shape, and moderate or strong carapace hardness) that likely permit them to swim efficiency while outside of hosts and entering and/or leaving host individuals. In contrast, pre- and post-hard crabs are well endowed for an endosymbiotic lifestyle featuring a soft and rounded carapace, and slender appendages. The allometry of selected traits suggests that males attain sexual maturity during the hard stage and likely roam among host individuals in search of mating opportunities. It remains unclear at which moment females become sexually active and whether hard females abandon host individuals in search of sexual partners.
Palabras clave: Crustacean , Dimorphism , Mating System , Pea-Crab , Post-Larval Cycle , Symbiosis
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/64634
DOI: https://dx.doi.org/10.1111/bij.12854
URL: https://onlinelibrary.wiley.com/doi/abs/10.1111/bij.12854
URL: https://academic.oup.com/biolinnean/article/120/1/54/2864975
Colecciones
Articulos(IIMYC)
Articulos de INSTITUTO DE INVESTIGACIONES MARINAS Y COSTERAS
Citación
Ocampo, Emiliano Hernan; Spivak, Eduardo Daniel; Baeza, Antonio J.; Luppi, Tomas Atilio; Ontogenetic changes in the external anatomy of the parasitic castrator crab Calyptraeotheres garthi: Implications for the timing of host colonization and sexual behaviour; Wiley Blackwell Publishing, Inc; Biological Journal of The Linnean Society; 120; 1; 27-7-2016; 54-74
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