Dry weight, carbon and nitrogen components of caprellid amphipods (Crustacea) inhabiting the Sargassumyezoense community of Otsuchi Bay, northeastern Japan |
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Authors: | I Takeuchi |
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Institution: | (1) Otsuchi Marine Research Center, Ocean Research Institute, The University of Tokyo, Akahama, Otsuchi, Iwate, 028-11 Japan, JP |
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Abstract: | Dry weight (DW), carbon (C) and nitrogen (N) contents in four species of caprellids, Caprella danilevskii, C. subinermis, C. penantis R-type, and C. verrucosa, inhabiting Sargassumyezoense (Yamada) in Otsuchi Bay, northeastern Japan, were measured based on live specimens. In all species males tend to grow larger
than females in pereonite II length, which is used as an indicator of body length, and have greater dry weight, carbon and
nitrogen contents. All three parameters (DW, C and N) had highly significant relationships against pereonite II length. Regressions
of female pereonite II length against the three parameters significantly differed from males in the four species. Average
percentages of carbon and nitrogen contents of the total dry weight ranged from 30.82 to 32.21% and 5.82 to 6.86%, respectively.
The carbon/nitrogen ratio tended to decrease against increasing pereonite II length, e.g., 7.2 to 4.3 in C. danilevskii.
Received: 25 November 1996 / Accepted: 31 July 1997 |
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