Threatened fishes of the world: aurora form of the brook charr,Salvelinus fontinalis (Mitchill, 1814) (Salmonidae)

1995 ◽  
Vol 43 (1) ◽  
pp. 107-108 ◽  
Author(s):  
Eugene K. Balon
Keyword(s):  
Salvelinus Fontinalis ◽  
Brook Charr ◽  
The World ◽  
Threatened Fishes

Environmental factors correlate with hybridization in stocked brook charr (Salvelinus fontinalis)

2012 ◽  
Vol 69 (5) ◽  
pp. 884-893 ◽  
Author(s):  
Amandine D. Marie ◽  
Louis Bernatchez ◽  
Dany Garant
Keyword(s):  
Environmental Factors ◽  
Brook Trout ◽  
Propagule Pressure ◽  
Salvelinus Fontinalis ◽  
Relative Effect ◽  
Genetic Integrity ◽  
Wild Populations ◽  
Brook Charr ◽  
The World

Stocking is a common practice throughout the world that may increase hybridization between wild and domesticated populations. Stocking intensity alone does not always fully explain the observed patterns of hybridization, suggesting that the intensity of hybridization may be modulated by environmental factors. Using brook charr (i.e., brook trout, Salvelinus fontinalis ) as a model, the objective of this study was to assess the relative effect of environmental factors and stocking intensity on the level of hybridization observed within brook charr from 15 lacustrine populations of two wildlife reserves in Quebec, Canada. The level of hybridization significantly increased with (i) the number of stocking events, (ii) a reduction in both surface area and maximum depth of lakes, and (iii) a reduction in dissolved oxygen and an increase in temperature and pH. These results suggest that levels of hybridization were affected by the availability and quality of lacustrine habitats as well as by the extent of propagule pressure. Our study provides the first demonstration that knowledge of environmental features may help predict the effects of stocking on the genetic integrity of wild populations.

Threatened fishes of the World: Acipenser sinensis Gray, 1834 (Acipenseriformes: Acipenseridae)

2008 ◽  
Vol 84 (2) ◽  
pp. 183-184 ◽  
Author(s):  
Xin Gao ◽  
Jian Wei Wang ◽  
Sébastien Brosse
Keyword(s):  
Acipenser Sinensis ◽  
The World ◽  
Threatened Fishes

Bénéfices à court terme des mouvements anadromes saisonniers pour une population d'omble de fontaine (Salvelinus fontinalis) du Nouveau Québec

1991 ◽  
Vol 48 (11) ◽  
pp. 2212-2222 ◽  
Author(s):  
Jean-François Doyon ◽  
Christiane Hudon ◽  
Roderick Morin ◽  
F. G. Whoriskey Jr.
Keyword(s):  
Water Level ◽  
Egg Size ◽  
Salvelinus Fontinalis ◽  
Condition Factor ◽  
Size At Maturity ◽  
Brook Charr ◽  
Tissue Water Content ◽  
Tissue Water ◽  
Single Population ◽  
Energetic Reserves

This study characterizes the seasonal anadromous movements of a brook charr population and compares its biological and energetic characteristics with charr spending summer in freshwaters. Downstream movements monitored at a counting fence over 3 yr were most intense in spring but occurred until fall and were positively correlated with rapid increases of water level. The timing of movements varied from year to year. Smaller charr were most subject to being swept downstream compared with freshwater residents, and most trout were concentrated near the mouth of the river. These patterns suggest that the downstream movements of charr in this system are passive. Upstream migrants had a higher condition factor and a lower tissue water content than freshwater residents, indicating that downstream movements result in a faster accumulation of energetic reserves during summer. However, the fortuitous character of anadromous migrations as well as the absence of differences in the biological characteristics (growth, size at maturity, fecundity, egg size) suggests that anadromous and resident fish belong to a single population whose yearly migrant component could be randomly determined.

Threatened fishes of the world: Gymnocypris przewalskii (Kessler, 1876) (Cyprinidae: Schizothoracinae)

2010 ◽  
Vol 87 (4) ◽  
pp. 351-352 ◽  
Author(s):  
Fei Xiong ◽  
Daqing Chen ◽  
Xinbin Duan
Keyword(s):  
The World ◽  
Gymnocypris Przewalskii ◽  
Threatened Fishes

Threatened fishes of the world: Hemisalanx prognathus (Regan 1908) (Salangidae)

2006 ◽  
Vol 78 (3) ◽  
pp. 209-210 ◽  
Author(s):  
Jie Zhang ◽  
Fuwen Wei ◽  
Ming Li ◽  
Muqi Xu
Keyword(s):  
The World ◽  
Threatened Fishes

Threatened fishes of the world: Anabarilius grahami Regan, 1908 (Cyprinidae)

2009 ◽  
Vol 86 (3) ◽  
pp. 399-400 ◽  
Author(s):  
Shu-Wei Liu ◽  
Xiao-Yong Chen ◽  
Jun-Xing Yang
Keyword(s):  
The World ◽  
Threatened Fishes

Hydrography and population genetic structure in brook charr (Salvelinus fontinalis, Mitchill) from eastern Canada

2000 ◽  
Vol 9 (7) ◽  
pp. 971-982 ◽  
Author(s):  
C. Hebert ◽  
R. G. Danzman ◽  
M. W. Jones ◽  
L. Bernatchez
Keyword(s):  
Genetic Structure ◽  
Population Genetic Structure ◽  
Population Genetic ◽  
Salvelinus Fontinalis ◽  
Brook Charr ◽  
Eastern Canada

scholarly journals Foraging behaviour and brain morphology in recently emerged brook charr, Salvelinus fontinalis

2010 ◽  
Vol 64 (11) ◽  
pp. 1905-1914 ◽  
Author(s):  
Alexander D. M. Wilson ◽  
Robert L. McLaughlin
Keyword(s):  
Foraging Behaviour ◽  
Salvelinus Fontinalis ◽  
Brain Morphology ◽  
Brook Charr

Mechanisms responsible for the niche shift of brook charr, Salvelinus fontinalis Mitchill, when living sympatrically with creek chub, Semotilus atromaculatus Mitchill

1984 ◽  
Vol 62 (8) ◽  
pp. 1548-1555 ◽  
Author(s):  
Pierre Magnan ◽  
Gérard J. FitzGerald
Keyword(s):  
Laboratory Experiments ◽  
Salvelinus Fontinalis ◽  
Niche Shift ◽  
Intraspecific Aggression ◽  
Brook Charr ◽  
Semotilus Atromaculatus ◽  
High Level ◽  
Gill Raker ◽  
Creek Chub ◽  
Study Laboratory

When brook charr, Salvelinus fontinalis Mitchill, are in allopatry in oligotrophic Québec lakes, they feed largely on macrobenthic invertebrates. However, when brook charr cooccur with creek chub, Semotilus atromaculatus Mitchill, they feed largely on zooplankton. In the present study, laboratory experiments showed that creek chub were more effective than brook charr in searching for hidden, patchily distributed prey. The searching efficiency of an individual chub feeding in a group was improved through social facilitation. In contrast, the high level of intraspecific aggression observed in brook charr prevents the formation of such feeding groups. In the laboratory, brook charr were able to displace creek chub from the food source because of interspecific aggression. Data are presented showing that chub are morphologically better adapted than charr to feed on benthos (subterminal orientation of the mouth and protrusible premaxillae), while the charr are better adapted than chub to feed on zooplankton (gill raker structure). Differences in feeding behaviour, morphology, and relative abundance between these species appear to be important in the observed niche shift of brook charr in nature.

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