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On the Biology of Calanus Finmarchicus X. Seasonal Changes in Oxygen Consumption

Published online by Cambridge University Press:  11 May 2009

S. M. Marshall  and
A. P. Orr
S. M. Marshall
Affiliation:
Marine Station, Millport
A. P. Orr
Affiliation:
Marine Station, Millport
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Extract

The seasonal changes in the respiration of Calanus are considerable and are, on the whole, related to size and therefore to weight. Length alone is not enough to account for the differences since ripe females, although the same length as unripe, have a markedly higher respiration. In addition, by taking samples of large and of small Calanus of a single stage, it was shown that the difference in respiration was small. Neither is weight by itself enough to account for the difference between groups. Stage V Calanus are, for a given length, heavier even than ripe females and yet their oxygen utilization is low. In this instance, however, an important part of the weight consists of fat which is a food reserve and not actively metabolizing. The difference of weight between ripe and unripe females is not known, but ripe females must be heavier and this will account for their higher oxygen consumption.

Although the oxygen and therefore the food required during the spring months is high, at that time the phytoplankton is at its maximum and is probably sufficient to fulfil all needs. Egg-laying depends on the food supply and it is then that Calanus starts breeding. In winter, on the other hand, the Calanus is present as Stage V and oxygen consumption is little more than half what earlier figures suggested. No ‘hibernation’ seems to take place but the population is living in an economical way for Stage V use little oxygen, live in deep water and do not undertake diurnal vertical migration.

At 10° C ripe female Calanus will require daily from 3·9–7·2% of their body weight as dry matter in summer and from 2·8–6·7% in winter. Stage V will require 2·3–3·1% in summer and 1·4–3·3% in winter. The higher values are for carbohydrate and the lower for fat.

It is difficult to believe that Calanus in winter will be able to find enough food by filtration alone. The fact that in the winter months it depends more on predation may account for its survival.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 37 , Issue 2 , June 1958 , pp. 459 - 472
Copyright
Copyright © Marine Biological Association of the United Kingdom 1958

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References

Bainbridge, R. 1952. Underwater observations on the swimming of marine zoo-plankton. J. mar. biol. Ass. U.K., Vol. 31, pp. 107–12.CrossRefGoogle Scholar
Clarke, G. L. & Bonnet, D. D. 1939. The influence of temperature on the survival, growth and respiration of Calanus finmarchicus. Biol. Bull., Woods Hole, Vol. 76, pp. 371–83CrossRefGoogle Scholar
Cushing, D. H. 1955. Production and a pelagic fishery. Fish. Invest. Lond., Ser. 2, Vol. 18, No. 7, 104 pp.Google Scholar
Fox, H. M. & Wingfield, C. A. 1938. A portable apparatus for the determination of oxygen dissolved in a small volume of water. J. exp. Biol., Vol. 15, pp. 437–45.Google Scholar
Fuller, J. L. 1937. Feeding rates of Calanus finmarchicusin relation to environmental conditions. Biol. Bull., Woods Hole, Vol.72, pp. 233–46.CrossRefGoogle Scholar
Fuller, J. L. & Clarke, G. L. 1936. Further experiments on the feeding of Calanus finmarchicus. Biol. Bull., Woods Hole, Vol. 70, pp. 308–20.CrossRefGoogle Scholar
Gauld, D. T. 1953. Diurnal variations in the grazing of planktonic copepods. J. mar. biol. Ass. U.K., Vol. 31, pp. 461–74.CrossRefGoogle Scholar
Gauld, D. T. & Raymont, J. E. G. 1953. The respiration of some planktonic copepods. II. The effect of temperature. J. mar. biol. Ass. U.K., Vol. 31, pp. 447–60.CrossRefGoogle Scholar
Harvey, H. W. 1937. Note on selective feeding by Calanus. J. mar. biol. Ass. U.K., Vol. 22, pp. 97–100.CrossRefGoogle Scholar
Marshall, S. M.Nicholls, A. G. & Orr, A. P. 1934. On the biology of Calanus finmarchicus. V. Seasonal distribution, size, weight and chemical composition in Loch Striven in 1933 and their relation to thephytoplankton. J. mar. biol. Ass. U.K., Vol. 19, pp. 793–827.CrossRefGoogle Scholar
Marshall, S. M.Nicholls, A. G. & Orr, A. P. 1935. On the biology of Calanus finmarchicus. VI. Oxygen consumption in relation to environmental conditions. J. mar. biol. Ass. U.K., Vol. 20, pp. 1–28.CrossRefGoogle Scholar
Marshall, S. M. & Orr, A. P. 1955. On the biology of Calanus finmarchicus. VIII. Food uptake, assimilation and excretion in adult and Stage V Calanus. J. mar. biol. Ass. U.K., Vol. 34, pp. 495–529.CrossRefGoogle Scholar
Marshall, S. M & Orr, A. P. 1956. On the biology of Calanus finmarchicus. IX. Feeding and digestion in the young stages. J. mar. biol. Ass. U.K., Vol. 35, pp. 587–603.CrossRefGoogle Scholar
Nicholls, A. G. 1933. On the biology of Calanus finmarchicus. III. Vertical distribution and diurnal migration in the Clyde sea area during 1932. J. mar. biol. Ass. U.K., Vol. 19, pp. 139–64.CrossRefGoogle Scholar
Oppenheimer, C. H. 1955. The effect of marine bacteria onthe development and hatching of pelagic fish eggs and the control of such bacteria by antibiotics. Copeia, 1955, pp. 43–9.Google Scholar
Raymont, J. E. G. & Gauld, D. T. 1951. The respiration of some planktonic cope-pods. J. mar. biol. Ass. U.K., Vol. 29, pp. 681–93.CrossRefGoogle Scholar
Riley, G. A.Stommel, H. & Bumpus, D. F. 1949. Quantitative ecology of the plankton of the western North Atlantic. Bull. Bing. oceanogr. Coll., Vol. 12, No. 3, 169 pp.Google Scholar
Russell, F. S. 1928. The vertical distribution of marine macroplankton. VII.Observations on the behaviour of Calanus finmarchicus. J. mar. biol. Ass. U.K., Vol.15, pp. 429–54.CrossRefGoogle Scholar