Biochemistry of red king crab (Paralithodes camtschaticus) from different locations in Alaskan waters
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Biochemistry of red king crab (Paralithodes camtschaticus) from different locations in Alaskan waters

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    "Samples of female red king crabs (Paralithodes camtschaticus) from Bristol Bay and the Pribilof Islands, Kodiak Island, and Petrel Bank were taken in June, September, and November 2006, respectively. Whole crab weight and the usual biometric parameters were recorded as well as weight of the ovary, hepatopancreas, and eggs. Moisture, ash, total lipid, and protein content of each organ were determined to investigate whether differences in biochemistry existed among crab from different areas and to initiate annual examination of these values to determine the extent of year-to-year variability. Relative gonadosomatic index values of crab from the different areas were consistent with the time interval between date of capture and typical mating season in their respective areas. Therefore, gonadosomatic index values were used as the estimator of the stage of annual reproductive cycle, as it was not possible to determine the stage of embryonic development. Crabs from Kodiak Island and Petrel Bank were further along in the reproductive cycle than crabs from Bristol Bay or the Pribilof Islands. The weight of the hepatopancreas relative to whole weight was the same in samples from the four areas. Crabs from Kodiak Island and Petrel Bank had higher lipid content in the hepatopancreas and ovary than crabs from Bristol Bay and the Pribilof Islands on a dry weight basis. Eggs of crabs from Kodiak Island had higher lipid content than crab from other areas. This may indicate that crabs from Kodiak Island had higher lipid content at fertilization. The results of this preliminary study indicate that a more extensive experiment, in which crab would be taken from the same area throughout the yearly cycle, would greatly benefit our understanding of the biochemical changes associated with reproduction. Determination of the fatty acid profiles and lipid classes of the lipid from such samples would also provide valuable information on the nutritional status of this species"--Exec. summary.
  • Content Notes:
    Kermit D. Reppond.

    "September 2009."

    Also available online in PDF.

    Includes bibliographical references (p. 15-16).

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