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image of Journal of Crustacean Biology

ABSTRACT Feeding and growth in wet weight of the red king crab Paralithodes camtschaticus were studied under laboratory conditions for 4 months from September 1993 to January 1994. Crabs were divided into 3 groups: ovigerous females, juvenile females, and mature males. Food consumption (g·d―1) significantly increased with crab wet weight (W), while feeding rate (FR, g·kg 1·d 1), weightstandardized food consumption, decreased significantly with crab weight. The relationship of FR∼W significantly differed between ovigerous females and juvenile females and males, but not between juvenile females and males, and can be expressed as FR = 70.9 - 0.017 W (P < 0.001) for ovigerous females, FR = 64.1 - 0.017 W (P < 0.001 ) for juvenile females and males. Crabs ceased feeding during molting, and feeding rates were significantly lower between 12 days before and 8 days after ecdysis than during the nonmolting period. Molted male crabs rapidly increased weight after molt. Their growth rate averaged 412.3 g·kg 1 ± 89.6 SD (wet weight) and decreased with crab weight. Among unmolted crabs, growth rates significantly differed between ovigerous females (66.6 g·kg 1 ± 19.4 SD), juvenile females (50.4 g·kg 1 ± 14.5 SD), and males (5.2 g·kg 1 ± 4.0 SD).


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