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Colorimetry of the hepatopancreas in Antarctic krill, Euphausia superba

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Summary

Hepatopancreas color of freshly caught as well as starved Euphausia superba was examined by a chroma meter to express it quantitatively and compare it with plant pigment contents. There was a high positive correlation (r= 0.77) between plant pigment contents of hepatopancreas and the purity (vividness) of hepatopancreas color, and a negative correlation between the pigment contents and the luminosity (brightness) of the color. During the starvation experiment the purity decreased from 0.480 to 0.198 during the first 6 days in accordance with the decrease in plant pigment contents from 4.7 to 0.9 μg krill−1. An examination of hepatopancreas color by a chroma meter proved an easy and quantitative way of knowing the feeding condition of E. superba.

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References

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Author information

Author notes

  1. Y. Endo

    Present address: Laboratory of Oceanography, Faculty of Agriculture, Tohoku University, 981, Sendai, Japan

  2. N. Kadoya

    Present address: Sanyo Hydrographic Survey Co., Ltd, 1-3-17, Horidome-cho, Nihonbashi, Chuoh-ku, 103, Tokyo, Japan

Authors and Affiliations

  1. Far Seas Fisheries Research Laboratory, 5-7-1, Orido, 424, Shimizu, Japan

    Y. Endo & N. Kadoya

  2. Tokai University, 3-20-1, Orido, 424, Shimizu, Japan

    Y. Endo & N. Kadoya

Authors
  1. Y. Endo
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  2. N. Kadoya
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Endo, Y., Kadoya, N. Colorimetry of the hepatopancreas in Antarctic krill, Euphausia superba . Polar Biol 11, 135–137 (1991). https://doi.org/10.1007/BF00234276

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  • DOI: https://doi.org/10.1007/BF00234276

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