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Production and Survivorship of Epizoites of the Hydroid Nemertesia Antennina (L.)

Published online by Cambridge University Press:  11 May 2009

R. G. Hughes
R. G. Hughes
Affiliation:
Department of Zoology, The University, Reading, Berkshire
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Extract

The survivorship of marine invertebrates that have a life span of less than 2 years is usually assessed by observing the decrease in abundance of animals from samples taken frequently throughout the life of an identifiable cohort or generation (e.g. Crisp, 1971). This method is only suitable for species with approximately simultaneous recruitment so that the animals can be aged with reasonable accuracy and the mortality before the end of the recruitment period can safely be ignored. Such age-specific survivorship data can be used to calculate secondary production by revealing the number of animals that reach successive weights (= Allen curves) (Crisp, 1971).

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 58 , Issue 2 , May 1978 , pp. 333 - 345
Copyright
Copyright © Marine Biological Association of the United Kingdom 1978

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References

REFERENCES

Benke, A. C. & Waide, J. B. 1977. In defence of average cohorts. Freshwater Biology, 7, 61–63.CrossRefGoogle Scholar
Crisp, D. J. 1971. Energy flow measurements. In Methods for the Study of the Marine Benthos (ed. N. A. Holme and A. D. Mclntyre), 344 pp. Oxford; Blackwell. (IBP Handbook No. 16.)Google Scholar
Hamilton, A. L. 1969. On estimating annual production. Limnology and Oceanography, 14, 771–782.CrossRefGoogle Scholar
Hughes, R. G. 1975. The distribution of the epizoites on the hydroid Nemertesia antennina (L.). Journal of the Marine Biological Association of the United Kingdom, 55, 275–294.CrossRefGoogle Scholar
Hughes, R. G. 1978. Life-histories and abundance of epizoites of the hydroid Nemertesia antennina (L.). Journal of the Marine Biological Association of the United Kingdom, 58, 313–332.CrossRefGoogle Scholar
Hynes, H. B. N. 1961. The invertebrate fauna of a Welsh mountain stream. Archiv fur Hydrobiologie, 57, 334–388.Google Scholar
Hynes, H. B. N. & Coleman, M. J. 1968. A simple method of assessing the annual production of stream benthos. Limnology and Oceanography, 13, 569–573.CrossRefGoogle Scholar
Waters, T. F. 1969. The turnover ratio in production ecology of freshwater invertebrates. American Naturalist, 103, 173–185.CrossRefGoogle Scholar