Caracterización y cronología del exoesqueleto en la centolla Lithodes santolla (Crustacea, Lithodidae) del Golfo San Jorge, Argentina.
Di Marco, E.J.
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Southern king crab Lithodes santolla specimens were captured during INIDEP research cruises in the San Jorge Gulf (45 degree -47' S, 64 degree -68' W), Argentine Sea, in March, April, July and August 2001 and August 2002. In order to determine qualitative and quantitative characters related to the shell ageing, a macroscopic examination of specimens was performed. The main considered characters were: shell hardness, ventral shell coloration, necrosis development, merus meat content, kind of epibionts, abrasions length on coxa and maximum size of ventral necrosis. A hierarchical grouping from the qualitative characters was elaborated and associations among these characters were established. Thus, a key to discriminate the specimens in different groups was elaborated. At the same time, a multivariate analysis was carried out considering the quantitative characters and assessing its correspondence with the established qualitative groups. The associations established between both qualitati.....