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Revista de biología marina y oceanografía

On-line version ISSN 0718-1957

Abstract

VILLALEJO-FUERTE, Marcial; CEBALLOS-VAZQUEZ, Bertha P; ARELLANO-MARTINEZ, Marcial  and  GARCIA-DOMINGUEZ, Federico. Contribution to the biology of the spider crabs Maiopsis panamensis Faxon, 1893 and Stenocionops ovata (Bell, 1835) (Decapoda: Majoidea) from the Gulf of California, Mexico. Rev. biol. mar. oceanogr. [online]. 2001, vol.36, n.2, pp.199-203. ISSN 0718-1957.  http://dx.doi.org/10.4067/S0718-19572001000200008.

Morphological data from incidental captures in the Gulf of California of the spider crabs Maiopsis panamensis and Stenocionops ovata are presented. Sex ratios, carapace width and length distributions by sex, weight distribution by sex, and ovigerous female frequency are reported. New maximum values for the size of the branchial width of the carapace in males of both species have been observed. 70 mm wider than previously recorded in M. panamensis and a 9.5 mm wider in S. ovata. Moreover, the presence of M. panamensis along the West Coast of the Gulf of California has been registered, out of its limit of the reported distribution.

Keywords : Spider crab; Majoidea; Gulf of California; Mexico.

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