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Immunocompetence, developmental stability and wingspot size in the damselfly Calopteryx splendens L.
The results suggest that the size of wingspot is an indicator of male quality in C.splendens, and the nylon implant encapsulation rate was positively correlated with the density of haemocytes in the haemolymph. Expand
Patterns of trematode parasitism in lymnaeid snails from northern and central Finland.
A species rich and prevalent larval digenean fauna was found in lymnaeid snail populations from two lakes in northern Finland (Kuivasjarvi and Pyykosjarvi populated by L. stagnalis and L. peregra,Expand
Ergasilid copepods as parasites of perch Perca fluviatilis and roach Rutilus rutilus in Central Finland: seasonality, maturity and environmental influence
The occurrence of egg-sacs and length distributions of the copepods suggest that there are two generations a year, e.g. an overwintering E. briani generation which produces offspring in June to attack the fish in July, and a second generation which attacks the fish from August onwards. Expand
Effect of the castrating trematode parasite Rhipidocotyle fennica on energy allocation of fresh-water clam Anodonta piscinalis
The effects of the castrating trematode parasite Rhipidocotyle fennica on energetics of fresh-water clam Anodonta piscinalis are studied, indicating the collection of long-term storage for maintenance during the winter. Expand
Immunocompetence and resource holding potential in the damselfly, Calopteryx virgo L
Staged contests in the territorial damselfly, Calopteryx virgo, found that winners of the contests showed higher immunocompetence, measured as encapsulation response, compared with that of losers, and the winners had larger fat reserves. Expand
Sexual ornamentation, androgens and papillomatosis in male roach (Rutilus rutilus)
It is proposed that papilloma disease, which occurs during spawning, may contribute to the honesty of the signal of sexual ornamentation in roach, and suggest that male roach with high concentrations of circulating androgens express strongly secondary sexual characters, but may be at a high risk of papillomatosis. Expand
Conservation status of freshwater mussels in Europe: state of the art and future challenges
Greater international cooperation using standardized protocols and methods to monitor and manage European freshwater mussel diversity will not only help conserve this vulnerable group but also, through the protection of these important organisms, will offer wider benefits to freshwater ecosystems. Expand
Breeding-related seasonal changes in immunocompetence, health state and condition of the cyprinid fish, Rutilus rutilus, L.
The present data suggest that the differential responses of the immune system may have different temporal patterns, which should be taken into account in immunoecological studies. Expand
Age-, size-, and sex-specific infection of Anodonta piscinalis (Bivalvia: Unionidae) with Rhipidocotyle fennica (Digenea: Bucephalidae) and its influence on host reproduction
A Rhipidocotyle fennica infection in Anodonta piscinalis was studied during 1987–1989 in Lake Saravesi, central Finland and prevalence was higher among female clams than among males, and logit models showed that prevalence increased linearly with host size in both habitats. Expand
Quantity of sporocysts and seasonality of two Rhipidocotyle species (Digenea: Bucephalidae) in Anodonta piscinalis (Mollusca: Bivalvia).
In both species viable sporocyst ribbons with early developmental stages of cercariae were found throughout the year, and no clear seasonality in prevalence was found in either species, although miracidia of these digeneans are present only in late summer and autumn. Expand