Observations on Development in Copepods

C. J. Corkett

Observations on Development in Copepods

In: Studies on Copepoda, Volume 2

Author:

C. J. Corkett

C. J. Corkett Biology Department Dalhousie University Halifax Nova Scotia Canada

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Type:: Chapter

Pages:: 150–153

DOI:: https://doi.org/10.1163/9789004629363_016

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Summary

In investigating development in three species of copepods in 1970, Corkett & McLaren suggested that development from hatching to copepodid I is the same multiple of development time of eggs to hatching at any given temperature. In general the time taken for the development to any larval stage is the same multiple of the time to the appearance of an earlier developmental stage at any given temperature. This also appears to be true for morphologically identifiable developmental stages in the development of fish eggs before hatching. This type of development has been called physiologically determined and occurs in copepods when food is sufficiently abundant, any shortage of food delaying development before causing death.

In 1980, an investigation was conducted on Eurytemora herdmani to compare development rates obtained in the laboratory with those obtained in a contained body of water of the Northwest Arm, Halifax, Nova Scotia. The development of a cohort of animals in the Northwest Arm was followed over two weeks and was found to take 10 days to develop from copepodid I to adult at an average temperature of 13°C. Animals taken from the same cohort were reared in the laboratory in excess food and found to take about 9 days to develop from CI to adult at 13°C, suggesting that copepods in the Northwest Arm were developing at maximal physiologically determined rates.

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Studies on Copepoda, Volume 2

Proceedings of the First International Conference on Copepoda, Amsterdam, The Netherlands, 24-28 August 1981

Series: Crustaceana, Supplements, Volume: 7

E-Book ISBN:: 9789004629363

Publisher:: Brill

Print Publication Date:: 01 Jan 1984

Subjects
- Biology
  - Biology & Environmental Sciences

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Observations on Development in Copepods

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Studies on Copepoda, Volume 2

Proceedings of the First International Conference on Copepoda, Amsterdam, The Netherlands, 24-28 August 1981

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