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Movements, abundance, age composition and growth of bass, Dicentrarchus labrax, in the Severn Estuary and inner Bristol Channel

Published online by Cambridge University Press:  06 October 2009

P. N. Claridge  and
I. C. Potter
P. N. Claridge
Affiliation:
School of Biological Sciences, University of Bath, Claverton Down, Bath, BA2 7AY
I. C. Potter
Affiliation:
School of Environmental and Life Sciences, Murdoch University, Murdoch, Western Australia 6150
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Abstract

The movements, abundance, age composition and growth of bass, Dicentrarchus labrax (L.), in the Severn Estuary and inner Bristol Channel have been described from regular samples offish taken from power-station intake screens between 1972 and 1977. Bass began to move into the estuary during late August or September and reached peak abundance between September and early November. The tendency for fish to move seawards in the late autumn and winter may be related to declining water temperatures in the estuary. Likewise, differences in abundance between years appear to be related to annual differences in temperature. Although the populations were dominated by the 0 + age class, successively decreasing numbers of the next four age classes and occasional 5 + fish were also present. Respective mean standard lengths of bass in the estuary at the end of their first to fifth years of life were approximately 65 mm (≡ 4·5 g), 130 mm (≡ 37·9 g), 190 mm (≡ 121·1 g), 250 mm (≡ 280·4 g) and 290 mm (≡ 441.5 g). Growth occurred predominantly between May and September, with the mean standard length of 1 + fish increasing from approximately 65 mm (≡ 4·5 g) to 130 mm (≡ 37·9 g).

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 63 , Issue 4 , November 1983 , pp. 871 - 879
Copyright
Copyright © Marine Biological Association of the United Kingdom 1983

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References

REFERENCES

Abou-Seedo, F. S. & Potter, I. C., 1979. The estuarine phase in the spawning run of the river lamprey Lampetra fluviatilis. Journal of Zoology, 188, 5–25.CrossRefGoogle Scholar
Anon., , 1970. National Angling Survey 1970. London: National Opinion Poll Market Research Ltd (on behalf of the Natural Environment Research Council).Google Scholar
Badsha, K. S. & Sainsbury, M., 1978a. Aspects of the biology and heavy metal accumulation of Ciliata mustela. Journal of Fish Biology, 12, 213–220.CrossRefGoogle Scholar
Badsha, K. S. & Sainsbury, M., 1978b. Some aspects of the biology and heavy metal accumulation of the fish Liparis liparis in the Severn Estuary. Estuarine and Coastal Marine Research, 7, 381–392.CrossRefGoogle Scholar
Claridge, P. N. & Gardner, D. C., 1977. The biology of the northern rockling, Ciliata septen-trionalis, in the Severn Estuary and Bristol Channel. Journal of the Marine Biological Association of the United Kingdom, 57, 839–848.CrossRefGoogle Scholar
Claridge, P. N. & Gardner, D. C., 1978. Growth and movements of the twaite shad, Alosafallax (Lacépède), in the Severn Estuary. Journal of Fish Biology, 12, 203–211.CrossRefGoogle Scholar
Clark, R. B., 1971. Changing success of coastal sport fishing. Marine Pollution Bulletin, 2, 153–156.CrossRefGoogle Scholar
Department of Energy, United Kingdom, 1981. Tidal Power from the Severn Estuary. Energy Paper No. 46. London: Her Majesty's Stationery Office.Google Scholar
Hardisty, M. W. & Huggins, R. J., 1975. A survey of the fish populations of the middle Severn Estuary based on power station sampling. International Journal of Environmental Studies, 7, 227–242.CrossRefGoogle Scholar
Hartley, P. H. T., 1940. The Saltash tuck-net fishery and the ecology of some estuarine fishes. Journal of the Marine Biological Association of the United Kingdom, 24, 1–68.CrossRefGoogle Scholar
Holden, M. J. & Williams, T., 1974. The biology, movements and population dynamics of bass, Dicentrarchus labrax, in English waters. Journal of the Marine Biological Association of the United Kingdom, 54, 91–107.CrossRefGoogle Scholar
Kelley, D., 1979. Bass populations and movements on the west coast of the U.K. Journal of the Marine Biological Association of the United Kingdom, 59, 889–936.CrossRefGoogle Scholar
Kennedy, M. & Fitzmaurice, P., 1972. The biology of the bass, Dicentrarchus labrax, in Irish waters. Journal of the Marine Biological Association of the United Kingdom, 52, 557–597.CrossRefGoogle Scholar
Lloyd, D., 1941. The marine fish fauna of the southern shores of the Bristol Channel. Proceedings of the Bristol Naturalists' Society, 9, 202–230.Google Scholar
Maddock, L. & Swann, G. L., 1977. A statistical analysis of some trends in sea temperature and climate in the Plymouth area in the last 70 years. Journal of the Marine Biological Association of the United Kingdom, 57, 317–338.CrossRefGoogle Scholar
Matthews, L. H., 1933. The sea fish and fisheries of the Bristol district. Proceedings of the Bristol Naturalists' Society, 7, 442–462.Google Scholar
Moore, J. W. & Moore, I. A., 1976a. The basis of food selection in flounders, Platichthys flesus, in the Severn Estuary. Journal of Fish Biology, 9, 139–156.CrossRefGoogle Scholar
Moore, J. W. & Moore, I. A., 1976b. The basis of food selection in some estuarine fishes. Eels, Anguilla anguilla, whiting, Merlangius merlangus, sprat, Sprattus sprattus, and stickleback, Gasterosteus aculeatus. Journal of Fish Biology, 9, 375–390.CrossRefGoogle Scholar
Moore, J. W., Moore, I. A. & Claridge, P. N., 1979. Seasonal changes in density, composition and reproductive biology of crustacean populations in the Severn estuary. Crustaceana, 36, 113–122.CrossRefGoogle Scholar
Ottaway, E. M. & Simkiss, K., 1979. A comparison of traditional and novel ways of estimating growth rates from scales of natural populations of young bass (Dicentrarchus labrax). Journal of the Marine Biological Association of the United Kingdom, 59, 49–59.CrossRefGoogle Scholar
Palmer, C. J., Culley, M. B. & Claridge, P. N., 1979. A further occurrence of Atherina boyeri Risso in North Eastern Atlantic waters. Environmental Biology of Fishes, 4, 71–75.CrossRefGoogle Scholar
Russell, F. S., 1935. On the occurrence of post-larval stages of the bass, Morone labrax (L.), in the Plymouth area. Journal of the Marine Biological Association of the United Kingdom, 20, 71–72.CrossRefGoogle Scholar
Russell, F. S., 1980. On the distribution of postlarval fish in the Bristol Channel. Bulletin of Marine Ecology, 8, 283–290.Google Scholar
Titmus, G., Claridge, P. N. & Potter, I. C., 1978. Growth and abundance of o-group herrings, Clupea harengus L., in the Severn Estuary. Zoological Journal of the Linnean Society, 64, 251–260.CrossRefGoogle Scholar
Wheeler, A., 1969. The Fishes of the British Isles and Northwest Europe. 613 pp. London: Macmillan.Google Scholar
Wheeler, A., 1979. The Tidal Thames. The History of a River and Its Fishes. 228 pp. London: Routledge & Kegan Paul.Google Scholar