| the population age structure and reproductive biology of gyrodactylus salaris malmberg (monogenea). | gyrodactylus salaris has recently become a major pathogen of atlantic salmon (salmo salar) in norway. the survivorship, population age structure and pattern of insemination of g. salaris were studied to determine the extent to which this species reproduces sexually. the age-specific mortality schedule of g. salaris could be described by an exponential model but day to day variations were large, with an increase in mortality after each birth. modelling population growth using the best fit mortali ... | 1994 | 8159462 |
| the effect of gyrodactylus salaris (monogenea) on the epidermis of atlantic salmon, salmo salar, parr in the river batnfjordselva, norway. | skin morphology of atlantic salmon, salmo salar, parr infected with gyrodactylus salaris was examined for 3 yr in the river batnfjordselva in norway and compared to that of uninfected salmon parr from a neighboring river. the epidermis of the infected population had more cell layers and was thicker than the epidermis of parr from the uninfected population. the number of mucous cells did not differ, and no seasonal changes in morphology of the epidermis were detected in either rivers. intensity o ... | 1997 | 9406797 |
| population growth of gyrodactylus salaris (monogenea) on norwegian and baltic atlantic salmon (salmo salar) stocks. | reproductive success of gvrodactylus salaris from river lierelva was compared experimentally on 3 stocks of salmon (12.5 degrees c +/- 0.2). isolated fish from 2 susceptible norwegian stocks (rivers lier and alta) and 1 resistant baltic stock of salmon (river neva) were infected with a single gravid worm in order to record the temporal sequence of births and age at death of individual parasites. establishment success (proportion of worms surviving to give birth) was generally low and mortality h ... | 2000 | 11155933 |
| mitochondrial dna variation of gyrodactylus spp (monogenea, gyrodactylidae) populations infecting atlantic salmon, grayling, and rainbow trout in norway and sweden. | approximately 800 bp of the mitochondrial cytochrome oxidase i (coi) gene were sequenced from 76 gyrodactylus specimens of 32 salmonid host populations, i.e. from salmo salar, thymallus thymallus, and oncorhynchus mykiss in norway, sweden and latvia. the coi sequences indicated a substantial intraspecific differentiation of gyrodactylus salaris and gyrodactylus thymalli. in total, 12 haplotypes were identified which group into five well supported clades, three clades with parasites from atlantic ... | 2003 | 14572510 |
| seawater tolerance and post-smolt migration of wild atlantic salmon salmo salar × brown trout s. trutta hybrid smolts. | high levels of hybridization between atlantic salmon salmo salar and brown trout salmo trutta have been reported in the river driva. this study presents the underlying mechanisms of development of seawater (sw) tolerance and marine migration pattern for s. salar×s. trutta hybrids. migrating s. salar×s. trutta hybrid smolts caught in the river driva, norway (a river containing gyrodactylus salaris), displayed freshwater (fw) gill na(+), k(+) -atpase (nka) activity levels of 11·8 µmol adp mg prote ... | 2012 | 23331146 |