NIPPON SUISAN GAKKAISHI
Online ISSN : 1349-998X
Print ISSN : 0021-5392
ISSN-L : 0021-5392
Annual Changes in the Properties of Carp Urine
Izuru Kakuta, Kenji Nanba, Kazumasa Uematsu, Shiro Murachi
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1987 Volume 53 Issue 4 Pages 573-579

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Abstract

Annual changes in the urine properties of freely swimming carp were examined monthly in connection with changes in the natural environment. Urine flow and absolute excretion volume of inorganic ions (Na+, K+, Ca2+, Mg2+) and nitrogen compounds (ammo-nium, creatine, protein, urea, creatinine and uric acid) changed along with changes in water temperature. Urine osmolarity and Na+ concentration decreased markedly in May and June, but K+, creatine and protein increased significantly in May, October and Novem-ber-December, respectively. Also, it was assumed that the annual changes in these para-meters were dependent upon not only the water temperature but also several other factors, such as feeding habit and photoperiod.

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  • Nippon Suisan Gakkaishi is an official journal of the Japanese Society of Fisheries Science written in Japanese only.
    The society publishes an English journal, Fisheries Science, as well, which accepts submissions from non-members of the society over the world. Detailed information is available in http://jsfs.jp/en/journals/fisheries-science.
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