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Observations on the Vertical Distribution of Eggs and Larvae of Mackerel and other Teleosts in the Celtic Sea and on the Sampling Performance of Different Nets in Relation to Stock Evaluation

Published online by Cambridge University Press:  11 May 2009

A. J. Southward  and
B. McK. BARY
A. J. Southward
Affiliation:
The Laboratory, Marine Biological Association, Citadel Hill, Plymouth
B. McK. BARY
Affiliation:
Department of Oceanography, University College, Galway, Ireland
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Extract

There is some controversy about the strength of the stock of mackerel in the Celtic Sea and off the coasts of Cornwall and Ireland, and it is difficult to find out if the numbers of mackerel in this area have fluctuated in the past (Johnson, 1977; Lockwood & Johnson, 1976; Lockwood, 1978; Coombs, Pipe & Mitchell, 1977,1979, 1980). The earliest complete survey of the south-west spawning grounds was made in 1937–9 (Steven & Corbin, 1939; Corbin, 1947) and was principally designed to show the seasonal and geographical pattern, not provide a basis for stock evaluation. Nevertheless, this survey is the only information we have about the breeding of mackerel in the days before the war when fishing was performed with drift-nets and lines, a period when we can assume exploitation was very much less intense than today when trawls and purse-seines are used. Attempts to use the 1937–9 data for estimation of the pre-war stock have been regarded as giving unsatisfactory results (Walsh, 1976). The data from the 1937–9 surveys were defective because we did not know the influence of the depth of fishing of the nets in relation to the vertical distribution of the eggs, nor the efficiency and catching capacity of the nets for sampling eggs and post-larvae.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 60 , Issue 2 , May 1980 , pp. 295 - 311
Copyright
Copyright © Marine Biological Association of the United Kingdom 1980

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References

Bary, B. M. & Frazer, E. J., 1970. A high-speed, opening-closing plankton sampler (Catcher II) and its electrical accessories. Deep-Sea Research, 17, 825–835.Google Scholar
Coombs, S. H., 1975. Continuous plankton records show fluctuations in larval fish abundance during 1948–72. Nature, London, 258, 134–136.CrossRefGoogle Scholar
Coombs, S. H., Pipe, R. K. & Mitchell, C. E., 1977. The eggs and larvae of mackerel (Scomber scombrus) to the west of the British Isles. International Council for the Exploration of the Sea (C.M. Papers and Reports), H:44, 21 pp. [Mimeo.]Google Scholar
Coombs, S. H., Pipe, R. K. & Mitchell, C. E., 1979. The vertical distribution of fish eggs and larvae in the eastern North Atlantic and North Sea. International Council for the Exploration of the Sea (Symposium Paper), ELH/DA:3, 24 pp. [Mimeo.]Google Scholar
Coombs, S. H., Pipe, R. K. & Mitchell, C. E., 1980. The vertical distribution of eggs and larvae of blue whiting (Micromesistius poutassou) and mackerel (Scomber scombrus) in the eastern North Atlantic and North Sea. Rapport et procès-verbaux des réunions. Conseil international pour l'exploration de la mer. (In the Press.)Google Scholar
Corbin, P. G., 1947. The spawning of mackerel, Scomber scombrus L., and pilchard, Clupea pilchardus Walbaum, in the Celtic Sea in 1937–39, with observations on the zooplankton indicator species, Sagitta and Muggiaea. Journal of the Marine Biological Association of the United Kingdom, 27, 65–132.CrossRefGoogle Scholar
Johnson, P. O., 1977. A review of spawning in the North Atlantic mackerel, Scomber scombrus L. Technical Report of the Fisheries Laboratory, Lowestoft, no. 37, 22 pp.Google Scholar
Lockwood, S. J., 1978. Mackerel - a problem in fish stock assessment. Laboratory Leaflets. Fisheries Laboratory, Lowestoft, no. 44, 18 pp.Google Scholar
Lockwood, S. J., Dawson, W. A. & Harrop, R., 1978. The western mackerel spawning stock size estimate for 1977. International Council for the Exploration of the Sea (C.M. Papers and Reports), H:11, 9 pp. [Mimeo.]Google Scholar
Lockwood, S. J. & Johnson, P. O., 1976. Mackerel research in the south-west. Laboratory Leaflets. Fisheries Laboratory, Lowestoft, no. 32, 26 pp.Google Scholar
Nellen, W. & Hempel, G., 1970. Beobachtungen am Icthyoneuston der Nordsee. Bericht der Deutschen wissenschaftlichen Kommission für Meeresforschung, 21, 311–348.Google Scholar
Pingree, R. D., 1975. The advance and retreat of the thermocline on the continental shelf. Journal of the Marine Biological Association of the United Kingdom, 55, 965–974.CrossRefGoogle Scholar
Pingree, R. D., Holligan, P. M., Mardell, G. T. & Head, R. N., 1976. The influence of physical stability on spring, summer and autumn phytoplankton blooms in the Celtic Sea. Journal of the Marine Biological Association of the United Kingdom, 56, 845–873.CrossRefGoogle Scholar
Russell, F. S., 1928. The vertical distribution of marine macroplankton. VI. Further observations on diurnal changes. Journal of the Marine Biological Association of the United Kingdom, 15, 81–103.CrossRefGoogle Scholar
Russell, F. S., 1930. The vertical distribution of marine macroplankton. IX. The distribution of the pelagic young of teleostean fishes in the daytime in the Plymouth area. Journal of the Marine Biological Association of the United Kingdom, 16, 639–676.CrossRefGoogle Scholar
Russell, F. S., 1976. The Eggs and Planktonic Stages of British Marine Fishes. 524 pp. London: Academic Press.Google Scholar
Russell, F. S., Southward, A. J., Boalch, G. T. & Butler, E. I., 1971. Changes in biological conditions in the English Channel off Plymouth during the last half century. Nature, London, 234, 468–470.CrossRefGoogle Scholar
Sette, O. E., 1943. Biology of the Atlantic mackerel (Scomber scombrus) of North America. Fishery Bulletin. Fish and Wildlife Service. United States Department of the Interior, 50, 148–237.Google Scholar
Silliman, R. P., 1943. Thermal and diurnal changes in the vertical distribution of eggs and larvae of the pilchard (Sardinops caerulea). Journal of Marine Research, 5, 118–130.Google Scholar
Southward, A. J., 1962. The distribution of some plankton animals in the English Channel and Approaches. II. Surveys with the Gulf III high-speed sampler, 1958–60. Journal of the Marine Biological Association of the United Kingdom, 42, 275–375.CrossRefGoogle Scholar
Southward, A. J., 1970. Improved methods of sampling post-larval young fish and macroplankton. Journal of the Marine Biological Association of the United Kingdom, 50, 689–712.CrossRefGoogle Scholar
Southward, A. J., 1974 a. Changes in the plankton community of the western English Channel. Nature, London, 249, 180–181.CrossRefGoogle ScholarPubMed
Southward, A. J., 1974 b. Long term changes in abundance of eggs of the Cornish pilchard (Sardina pilchardus Walbaum) off Plymouth. Journal of the Marine Biological Association of the United Kingdom, 54, 641–649.CrossRefGoogle Scholar
Southward, A. J., Butler, E. I. & Pennycuick, L., 1975. Recent cyclic changes in climate and in abundance of marine life. Nature, London, 253, 714–717.CrossRefGoogle Scholar
Steven, G. A. & Corbin, P. G., 1939. Mackerel investigation at Plymouth. Preliminary report. Rapport et proces-verbaux des réunions. Conseil permanent international pour l'exploration de la mer, 111 (app. 2), 15–18.Google Scholar
Walsh, M., 1976. Mackerel spawning to the west of the Britsh Isles. International Council for the Exploration of the Sea (C.M. Papers and Reports), H:33, 17 pp. [Mimeo.]Google Scholar
Wood, R. J., 1971. Some observations on the vertical distribution of herring larvae. Rapport et procès-verbaux des réunions. Conseil international pour l'exploration de la mer, 160, 60–64.Google Scholar