Abstract
Species of Calanus were sampled at stations off southwest Nova Scotia during an 8-d cruise in June, 1982. A simple model using shipboard measurement of molting rates of predominant copepodite stages accurately predicted the changes in cohort structure that occurred at stations along a transect at the beginning and end of the cruise. The combined durations of C. finmarchicus (Gunnerus) stages CIII and CIV, calculated from the inverses of molting rates corrected for presence of diapausing C. glacialis Jaschnov, corresponded well with development times based on laboratory rearing experiments. We conclude that our molting rate measurements accurately reflected processes in nature. This methodology is useful for analyzing the dynamics and production of copepod populations.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
Literature cited
Burkill, P. H. and T. F. Kendall: Production of the copepod Eurytemora affinis in the Bristol Channel. Mar. Ecol. Prog. Ser. 7, 21–31 (1982)
Corkett, C. J. and I. A. McLaren: Relationships between development rate of eggs and older stages of copepods. J. mar. biol. Ass. U.K. 50, 161–168 (1970)
Corkett, C. J., I. A. McLaren and J.-M. Sevigny: The rearing of the marine calanoid copepods Calanus finmarchicus (Gunnerus), C. glacialis Jaschnov, and C. hyperboreus Krøyer with comment on the equiproportional rule (Copepoda). Proc. 2nd. Int. Conf. Copepoda, Ottawa. Syllogeus (In press)
Falkowski, P. G., J. Vidal, T. S. Hopkins, G. T. Row, T. E. Whitledge and W. G. Harrison: Summer nutrient dynamics in the Middle Atlantic Bight: primary production and utilization of phytoplankton carbon. J. Plankt. Res. 5, 515–537 (1984)
Landry, M. R.: Population dynamics and production of a planktonic marine copepod, Acartia clausii, in a small temperate lagoon on San Juan Island, Washington. Int. Revue ges. Hydrobiol. 63, 77–119 (1978)
Landry, M. R.: The development of marine calanoid copepods with comment on the isochronal rule. Limnol. Oceanogr. 28, 614–624 (1983)
MacDonald, P. D. M. and T. J. Pitcher: Age groups from size-frequency data: a versatile and efficient method of analyzing distribution mixtures. J. Fish. Res. Bd Can. 36, 987–1001 (1979)
McLaren, I. A.: Generation lengths of some temperate marine copepods: estimation, prediction, and implications. J. Fish. Res. Bd Can. 35, 1330–1342 (1978)
McLaren, I. A. and C. J. Corkett: Singular, mass-specific P/B ratios cannot be used to estimate copepod production. Can. J. Fish. aquat. Sci. 41, 828–830 (1984)
McLaren, I. A. and C. J. Corkett: Life cycles and production of some copepods on the Scotian Shelf, eastern Canada. Proc. 2nd int. Conf. Copepoda, Ottawa. Syllogeus (In press)
Miller, C. B., M. E. Huntley and E. R. Brooks: Post-collection molting rates of planktonic, marine copepods: measurement, applications, problems, Limnol. Oceanogr. (In press)
Vidal, J.: Physioecology of zooplankton. II. Effects of phytoplankton concentration, temperature, and body size on the development and molting rates of Calanus pacificus and Pseudocalanus sp. Mar. Biol. 56, 135–146 (1980)
Author information
Authors and Affiliations
Additional information
Communicated by R. W. Doyle, Halifax
Rights and permissions
About this article
Cite this article
Runge, J.A., McLaren, I.A., Corkett, C.J. et al. Molting rates and cohort development of Calanus finmarchicus and C. glacialis in the sea off southwest Nova Scotia. Mar. Biol. 86, 241–246 (1985). https://doi.org/10.1007/BF00397510
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00397510