Hostname: page-component-cd9895bd7-7cvxr Total loading time: 0 Render date: 2024-12-22T17:34:06.751Z Has data issue: false hasContentIssue false

The Succession of Generations and Growth of the Caligid Copepods Caligus Elongatus and Lepeophtheirus Salmonis Parasitising Farmed Atlantic Salmon Smolts (Salmo Salar L.)

Published online by Cambridge University Press:  11 May 2009

Oliver Tully
Affiliation:
Shellfish Research Laboratory, Carna, Connemara, Co. Galway, Ireland

Extract

Infestation of cage cultured Atlantic salmon by the external parasitic copepods Caligus elongatus (Nordmann) and Lepeophtheirus salmonis (Kröyer) is a serious cause of loss of production in the commercial sea water culture of this species. The copepods feed on the mucus, skin and blood of their hosts (Kabata, 1974; Brandal et al., 1976) causing irritation and lesions. Loss in production due to infestation by lice occurs directly by the mortality of fish from osmotic shock and indirectly from a probable reduction in growth, from secondary infections such as vibriosis (Wootten et al., 1982) or by increasing vulnerability to ultraviolet radiation damage (McArdle & Bullock, 1987).

Type
Research Article
Copyright
Copyright © Marine Biological Association of the United Kingdom 1989

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Bjordal, A., Ferno, A., Furevik, D. & Huse, I., 1988. Effects on salmon (Salmo salar) from different operational procedures in fish farming. International Council for the Exploration of the Sea (CM. Papers and Reports), F: 16, 13 pp.Google Scholar
Brandal, P.O. & Egidius, E., 1979. Treatment of salmon lice, Lepeophtheirus salmonis (Krøyer, 1838) with Neguvon® - description of method and equipment. Aquaculture, 18, 183188.CrossRefGoogle Scholar
Brandal, P.O., Egidius, E. & Romslo, I., 1976. Host blood: a major food component for the parasitic copepod Lepeophtheirus salmonis Kroyeri 1838 (Crustacea: Caligidae). Norwegian journal of Zoology, 24, 341343.Google Scholar
Evans, F. & Diaz, W., 1978. Microsetella norvegica (Boeck): a direct relationship between seasonal sea temperature and adult size in a planktonic copepod. Crustaceana, 34, 313315.CrossRefGoogle Scholar
Groch, L. & Svobodova, Z., 1975. Changes in the red blood picture of the carp intoxicated with organophosphate insecticides. Ceskoslovenskd Hygiena, 19, 424442.Google Scholar
Johannessen, A., 1978. Early stages of Lepeophtheirus salmonis (Copepoda, Caligidae). Sarsia, 63, 169176.CrossRefGoogle Scholar
Kabata, Z., 1973. The species of Lepeophtheirus (Copepoda: Caligidae) from fishes of British Columbia. Journal of the Fisheries Research Board of Canada, 30, 729759.CrossRefGoogle Scholar
Kabata, Z., 1974. Mouth and mode of feeding of Caligidae (Copepoda) parasites of fishes, as determined by light and scanning E.M. Journal of the Fisheries Research Board of Canada, 31, 15831588.CrossRefGoogle Scholar
McArdle, J. & Bullock, A.M., 1987. Solar ultraviolet radiation as a causal factor of ‘summer syndrome’ in cage reared Atlantic salmon Salmo salar L.: a clinical and histopathological study. Journal of Fish Diseases, 10, 255264.CrossRefGoogle Scholar
Pal, A. & Konar, I., 1985. Chronic effects of the organophosphorus insecticide DDVP on feeding, survival, growth and reproduction of fish. Environmental Ecology, 3, 398402.Google Scholar
Raverty, S. A., 1987. Epidemiology of the Salmon Louse, Lepeophtheirus salmonis on Booker McConnell Farm Sites and the Clinicopathology and Enzymology of Repetitive Nuvan EC 500 Treatments in Salmo salar. MSc Thesis, University of Stirling, Scotland.Google Scholar
Sanders, H. O., 1969. Toxicities of pesticides to the crustacean Gammarus lacustris. Technical Papers of the Bureau of Sport Fisheries and Wildlife, no. 25, 18 pp.Google Scholar
Sanders, H. O. & Cope, O. B., 1966. Toxicities of several pesticides to two species of cladocerans. Transactions of the American Fisheries Society, 95, 165166.CrossRefGoogle Scholar
Strokun, P., 1980. Enzyme activity - an index of the physiological state of fish. Veterinariya, Moscow, 4, 6061. [In Russian.]Google Scholar
Taylor, R.S., 1987. The Biology and Treatment of Sea Lice on a Commercial Atlantic Salmon Farm. MSc Thesis, National University of Ireland.Google Scholar
Tully, O., 1988. Detection of dichlorvos in the marine environment and its toxicity to bivalves, crustaceans and fish. Shellfish Research Laboratory, Carna, Laboratory Report Series (B), no. 0062, 1122.Google Scholar
Wootten, R., 1985. Experience of sea lice infestations on Scottish salmon farms. International Council for the Exploration of the Sea (CM. Papers and Reports), F: 7/RefM, 6 pp.Google Scholar
Wootten, R., Smith, J.W. & Needham, E.A., 1982. Aspects of the biology of the parasitic copepods, Lepeophtheirus salmonis and Caligus elongatus on farmed salmonids and their treatment. Proceedings of the Royal Society of Edinburgh (B), 81, 185197.Google Scholar