No CrossRef data available.
Article contents
Effect of Gyrodactylus derjavini infections on cortisol production in rainbow trout fry
Published online by Cambridge University Press: 12 April 2024
Abstract
Cortisol production in fry of rainbow trout (367–456 mg body weight) infected with the ectoparasitic monogenean Gyrodactylus derjavini (mean intensities 4.7 and 4.9 parasites per fish) was studied at two temperature levels, 4–6°C and 11–12°C, respectively. Due to difficulties in obtaining an adequate amount of plasma from the small sized fish, the corticosteroid concentration was measured in the body fluid recovered (as supernatant) after sonication and centrifugation of whole fry. Infected fry at 11–12°C showed an elevated level of cortisol compared to uninfected fry. However, the cortisol concentration was lower than in fish exposed to handling stress. At 4°C, the cortisol level in infected fish compared to uninfected was insignificantly increased. The findings are discussed in relation to the role of monogeneans as inducers of secondary infections.
- Type
- Research Article
- Information
- Copyright
- Copyright © Cambridge University Press 2001
References
Avella, M., Schreck, C.B. & Prunet, P. (1991) Plasma prolactin and cortisol concentrations of stressed coho salmon, Oncorhynchus kisutch, in fresh water or salt water. General and Comparative Endocrinology 81, 21–27.CrossRefGoogle ScholarPubMed
Barton, B.A. & Iwama, G.K. (1991) Physiological changes in fish from stress in aquaculture with emphasis on the response and effects of corticosteroids. Annual Review of Fish Diseases 2, 3–26.CrossRefGoogle Scholar
Buchmann, K. & Bresciani, J. (1997) Parasitic infections in pond-reared rainbow trout Oncorhynchus mykiss in Denmark. Diseases of Aquatic Organisms 28, 125–138.CrossRefGoogle Scholar
Cusack, R. & Cone, D.K. (1986) A review of parasites as vectors of viral and bacterial diseases of fish. Journal of Fish Diseases 9, 169–171.CrossRefGoogle Scholar
Fagerlund, U.H.M. (1967) Plasma cortisol concentration in relation to stress in adult sockeye salmon during the freshwater stage of their life cycle. General and Comparative Endocrinology 8, 197–207.CrossRefGoogle ScholarPubMed
Fevolden, S.E., Refstie, T. & Røed, K.H. (1991) Selection for high and low cortisol response in Atlantic salmon (Salmo salar) and rainbow trout (Oncorhynchus mykiss). Aquaculture 95, 53–65.CrossRefGoogle Scholar
Harris, P.D., Soleng, A. & Bakke, T.A. (2000) Increased susceptibility of salmonids to the monogenean Gyrodactylus salaris following administration of hydrocortisone acetate. Parasitology 120, 57–61.CrossRefGoogle Scholar
Houghton, R. & Matthews, R.A. (1990) Immunosuppression in juvenile carp, Cyprinus carpio L.: the effects of the corticosteroids triamcinolone acetonide and hydrocortisone 21-hemisuccinate (cortisol) on acquired immunity and the humoral antibody response to Ichthyophthirius multifiliis Fouquet. Journal of Fish Diseases 13, 269–280.CrossRefGoogle Scholar
Kurogi, J. & Iida, T. (1999) Social stress suppresses defence activities of neutrophils in tilapia. Fish Pathology 34, 15–18.CrossRefGoogle Scholar
Lindenstrøm, T. & Buchmann, K. (1998) Dexamethasone treatment increases susceptibility of rainbow trout, Oncorhynchus mykiss (Walbaum), to infections with Gyrodactylus derjavini Mikailov. Journal of Helminthology 21, 29–38.Google ScholarPubMed
Lindenstrøm, T. & Buchmann, K. (2000) Acquired resistance in rainbow trout against Gyrodactylus derjavini
. Journal of Helminthology 74, 155–160.CrossRefGoogle ScholarPubMed
Mustafa, A., MacWilliams, C., Fernandez, N., Matchett, K., Conboy, G.A. & Burka, J.F. (2000) Effects of sea lice (Lepeophtheirus salmonis Krøyer, 1837) infestation on macrophage functions in Atlantic salmon (Salmo salar L.). Fish and Shellfish Immunology 10, 47–59.CrossRefGoogle ScholarPubMed
Nielsen, M.E. & Buchmann, K. (1997) Association between immunisation, reduced weight gain and plasma cortisol concentrations in juvenile Baltic salmon (Salmo salar). Acta Veterinaria Scandinavica 38, 275–282.CrossRefGoogle Scholar
Pickering, A.D. (1993) Growth and stress in fish production. Aquaculture 111, 51–63.CrossRefGoogle Scholar
Pickering, A.D., Pottinger, T.G., Sumpter, J.P., Carragher, J.F. & Le, Bail P.Y. (1991) Effects of acute and chronic stress on the levels of circulating growth hormone in the rainbow trout, Oncorhynchus mykiss
. General and Comparative Endocrinology 83, 86–93.CrossRefGoogle ScholarPubMed
Pottinger, T.G. & Day, J.G. (1999) A Saprolegnia parasitica challenge system for rainbow trout: assessment of pyceze as an anti-fungal agent for both fish and ova. Diseases of Aquatic Organisms 36, 129–141.CrossRefGoogle ScholarPubMed
Pottinger, T.G., Yeomans, W.E. & Carrick, T.R. (1999) Plasma cortisol and 17 beta-oestradiol levels in roach exposed to acute and chronic stress. Journal of Fish Biology 54, 525–532.Google Scholar
Thomas, P. & Robertson, L. (1991) Plasma cortisol and glucose response of red drum (Sciaenops ocellatus) to handling and shallow water stressors and anesthesia with MS-222, quinaldine sulfate and metomidate. Aquaculture 96, 69–86.CrossRefGoogle Scholar
Wagner, E.J., Bosakowski, T. & Intelmann, S. (1997) Combined effects of temperature and high pH on mortality and the stress response of rainbow trout after stocking. Transactions of the American Fisheries Society 126, 985–998.2.3.CO;2>CrossRefGoogle Scholar
Yang, C.Z. & Albright, L.J. (1995) Elevation of plasma cortisol and hypertrophic response of interrenal and chromaffin tissues of rainbow trout, Oncorhynchus mykiss (Walbaum) to the harmful diatom Chaetoceros concavicornis
. Journal of Fish Diseases 18, 165–174.CrossRefGoogle Scholar