A survey of the parasites of nonanadromous and anadromous brook charr (Salvelinus fontinalis) in the Tabusintac River, New Brunswick, Canada

1987 ◽  
Vol 65 (6) ◽  
pp. 1354-1362 ◽  
Author(s):  
Jack P. Frimeth
Keyword(s):  
New Brunswick ◽  
Salvelinus Fontinalis ◽  
Salvelinus Alpinus ◽  
Arctic Charr ◽  
The Arctic ◽  
Brook Charr ◽  
New Host ◽  
Marine Parasites ◽  
First Time ◽  
Hysterothylacium Aduncum

A parasite survey of 1146 brook charr (Salvelinus fontinalis) was conducted between January 1981 and December 1982 in the Tabusintac River, New Brunswick, Canada. A total of 36 parasite species were recovered, of which 18 (one Myxosporea, two Monogenea, three Digenea, three Cestoidea, five Nematoda, one Acanthocephala, one Hirudinoidea, one Crustacea, and a Dermocystidium sp.) were freshwater and 18 (two Monogenea, seven Digenea, two Cestoidea, two Nematoda, two Acanthocephala, and three Crustacea) were marine. Anadronomous charr were differentiated from nonanadromous charr in fresh water by the presence of marine parasites. Charr in the estuary and lagoon were all considered to be anadromous; however, first-time anadromous charr or smolts were differentiated by the absence of marine parasites and infection with freshwater parasites only. New host records include Lecithaster gibbosus, Zoogonus lasius, Podocotyle angulata, Cryptocotyle lingua (metacercariae), Stephanostomum tenue (metacercariae, adults), Eubothrium crassum, Tetraphyllidea gen. sp. (plerocercoids), Eustrongylides sp. (larvae), Hysterothylacium aduncum (larvae, adults), Corynosoma magdaleni (juveniles), Argulus alosae, and Ergasilus labracis. Zoogonus lasius and Stephanostomum tenue represent new Canadian records, and Chloromyxum truttae and Truttaedacnitis truttae are reported for the first time from New Brunswick. Bulbodacnitis alpinus, previously reported only from the Arctic charr (Salvelinus alpinus), is considered to be a synonym of T. truttae.

Potential use of certain parasites of brook charr (Salvelinus fontinalis) as biological indicators in the Tabusintac River, New Brunswick, Canada

1987 ◽  
Vol 65 (8) ◽  
pp. 1989-1995 ◽  
Author(s):  
Jack P. Frimeth
Keyword(s):  
New Brunswick ◽  
Fresh Water ◽  
Salvelinus Fontinalis ◽  
Black Spot ◽  
Biological Indicators ◽  
Gastrointestinal Parasites ◽  
Brook Charr ◽  
River Systems ◽  
Potential Use ◽  
Hysterothylacium Aduncum

A survey of 1146 nonanadromous and anadromous brook charr (Salvelinus fontinalis) from the Tabusintac River for parasites revealed 36 species of parasites, of which 18 were freshwater and 18 were marine. Most freshwater parasites were either too common or too rare in their occurrence to be of any value as biological indicators; however, Diplostomum sp. (metacercariae), Truttaedacnitis truttae, and Salmincola edwardsii were useful as indicators of foci of infection in fresh water. Decreases in prevalences of infection with marine gastrointestinal parasites in the estuary, especially Brachyphallus crenatus, Neoechinorhynchus sp., and larvae of Hysterothylacium aduncum, provided evidence for the approximate times of arrival of anadromous charr from fresh water. Marine gastrointestinal parasites were also useful as biological indicators of anadromous charr in fresh water, but these parasites were lost after varying times. High prevalences of infection with metacercariae of the marine digenean Cryptocotyle lingua resulted in a black spot condition that proved to be the best indicator of anadromous charr in fresh water. The distributions of Azygia longa, Echinorhynchus lateralis, and Zoogonus lasius from charr in the Tabusintac River as well as the nearby Miramichi and Burnt Church estuaries suggested that estuarine wanderings among adjacent river systems do occur. Tetraphyllidea gen. sp. plerocercoids from anadromous charr in the Tabusintac River were useful in identifying offshore movements of these charr into the Gulf of St. Lawrence.

scholarly journals Linseed oil as a substitute for fish oil in the diet of Arctic charr (Salvelinus alpinus), brook charr (S. fontinalis) and their reciprocal hybrids.

2022 ◽  
Vol 22 ◽  
pp. 100949
Author(s):  
Bernard-Antonin Dupont-Cyr ◽  
Nathalie R. Le François ◽  
Felix Christen ◽  
Véronique Desrosiers ◽  
Arianne Savoie ◽  
...  
Keyword(s):  
Fish Oil ◽  
Salvelinus Alpinus ◽  
Arctic Charr ◽  
Linseed Oil ◽  
Brook Charr ◽  
Reciprocal Hybrids

Does the Arctic charr (Salvelinus alpinus) exhibit a seasonal change in seawater tolerance?

Aquaculture ◽  
1989 ◽  
Vol 82 (1-4) ◽  
pp. 383-384 ◽  
Author(s):  
Bengt Finstad ◽  
Kjell J. Nilssen ◽  
Arne M. Arnesen
Keyword(s):  
Seasonal Change ◽  
Salvelinus Alpinus ◽  
Arctic Charr ◽  
The Arctic ◽  
Seawater Tolerance

REGULAR ARTICLES / ARTICLES RÉGULIERS Whether to reproduce or not: immune suppression and costs of parasites during reproduction in the Arctic charr

2001 ◽  
Vol 79 (2) ◽  
pp. 271-278 ◽  
Author(s):  
Frode Skarstein ◽  
Ivar Folstad ◽  
Ståle Liljedal
Keyword(s):  
Immune Suppression ◽  
Salvelinus Alpinus ◽  
Arctic Charr ◽  
Indirect Evidence ◽  
The Arctic ◽  
Parasitic Infections ◽  
Intermediate Hosts ◽  
Parasite Infections ◽  
Gamete Production ◽  
The Difference

Secondary sexual characters are assumed to be costly to develop, and the costs of parasite infections and immune suppression are currently an active area of research within sexual selection. We investigated differences in parasitic infections and immunological activity between reproductively active and inactive Arctic charr (Salvelinus alpinus). Spawning fish were found to have higher intensities of macroparasite infections than nonspawning or resting fish. The difference in intensity between spawning and resting fish was only observed in males, and can be explained by differences in exposure or susceptibility to parasites. However, there is indirect evidence that the difference in parasite intensities does not stem from varying exposure originating from group differences in consumption of carotenoid-containing intermediate hosts. We show, rather, that spawning males may be more susceptible, since they have a smaller spleen, which is an important lymphocyte-producing organ, than resting males. As these costs of spawning are found predominantly among males, they are unlikely to be the result of energetic investment in gamete production, as gamete production in general is thought to be more energetically demanding in females than in males. Rather, we suggest that the observed costs of reproduction result from immune suppression related to ornamental development and spermatogenesis.

Influence of nutritional status on biomarker responses to PCB in the Arctic charr (Salvelinus alpinus)

1999 ◽  
Vol 44 (4) ◽  
pp. 233-244 ◽  
Author(s):  
Even H Jørgensen ◽  
Bjørn E Bye ◽  
Malcolm Jobling
Keyword(s):  
Nutritional Status ◽  
Salvelinus Alpinus ◽  
Arctic Charr ◽  
The Arctic
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