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Comparative Respiratory Physiology and Ecology of Phyllopod Crustacea. I. Conchostraca 1 )

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[The relations between sex, body size, dissolved O2, temperature and the oxygen consumption of the conchostracan, Cyzicus californicus, were studied. Salinity tolerance was also determined. Little effect of weight on metabolic rate is shown within the sexually mature size range. VO2 varies with the 0.96 (♂ ♂ ) and 0.86 (♀♀ ) power of weight, suggesting that the surface area rule does not apply. Males show considerably greater VO2 at similar weight at 12° C. This relationship may shift with temperature, such as above 25° C. VO2 is independent of CO2 down to 0.4-0.5 cm3/1 at 12° C. Cyzicus demonstrates low Q10'S (mainly 1,1-1,8). VO2 peaks at about 25° C but higher temperatures are tolerated, thus conchostracans tend to be found in warmer waters than other phyllopods.Cyzicus survives best in 0.4-1.8 ppt SW and field data show it lives in salinities equivalent to 1 ppt SW., The relations between sex, body size, dissolved O2, temperature and the oxygen consumption of the conchostracan, Cyzicus californicus, were studied. Salinity tolerance was also determined. Little effect of weight on metabolic rate is shown within the sexually mature size range. VO2 varies with the 0.96 (♂ ♂ ) and 0.86 (♀♀ ) power of weight, suggesting that the surface area rule does not apply. Males show considerably greater VO2 at similar weight at 12° C. This relationship may shift with temperature, such as above 25° C. VO2 is independent of CO2 down to 0.4-0.5 cm3/1 at 12° C. Cyzicus demonstrates low Q10'S (mainly 1,1-1,8). VO2 peaks at about 25° C but higher temperatures are tolerated, thus conchostracans tend to be found in warmer waters than other phyllopods.Cyzicus survives best in 0.4-1.8 ppt SW and field data show it lives in salinities equivalent to 1 ppt SW.]

Affiliations: 1: Joint Science Department, The Claremont Colleges, Claremont, Ca., U.S.A.; 2: Biological Sciences, California Polytechnic State University, San Luis Obispo, Ca., U.S.A.

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/content/journals/10.1163/156854080x00247
1980-01-01
2016-12-09

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