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.

Impact of photostimulation for delayed maturity on flesh quality of brook trout (Salvelinus fontinalis ) stored under refrigerated conditions

2018 ◽  
Vol 49 (12) ◽  
pp. 3817-3829 ◽  
Author(s):  
Zuzana Linhartová ◽  
Roman Lunda ◽  
Jan Másílko ◽  
Petr Dvořák ◽  
Katsiaryna Lundová ◽  
...  
Keyword(s):  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Flesh Quality

The Effect of a Flaxseed Oil-Enhanced Diet on the Product Quality of Farmed Brook Trout (Salvelinus fontinalis) Fillets

2011 ◽  
Vol 76 (3) ◽  
pp. S192-S197 ◽  
Author(s):  
Courtney A Simmons ◽  
Philip Turk ◽  
Sarah Beamer ◽  
Jacek Jaczynski ◽  
Kenneth Semmens ◽  
...  
Keyword(s):  
Product Quality ◽  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Flaxseed Oil

scholarly journals HUMAN SPERM COUNT

2015 ◽  
Vol 22 (01) ◽  
pp. 013-017
Author(s):  
Jahangir Sultan ◽  
Kokab Kokab ◽  
Muneer Ahmed
Keyword(s):  
Environmental Factors ◽  
Human Activity ◽  
Semen Quality ◽  
Sperm Quality ◽  
Sperm Count ◽  
Human Sperm ◽  
Factors Affecting ◽  
Parental Exposure ◽  
The World

Objectives: Reports from many parts of the world suggest that chemical andphysical agents in the environment, introduced and spread by human activity may affect fertilityin men. The objective of this article is to highlight the environmental factors and their associationto male sperm quality and count as well. Materials and Methods: This study focusing onexposure to environmental factors affecting the semen quality of the workers working in differentfactories for a period of 5 to 7 years in Lahore. Results: The results from this study suggest thatthere are many environmental factors which may affect semen quality and sperm count. It isnecessary to prevent parental exposure to the agents associated with those hazards.

Species Concepts in the Genus Usnea (Lichenized Ascomycetes)

1998 ◽  
Vol 30 (4-5) ◽  
pp. 321-340 ◽  
Author(s):  
Philippe Clerc
Keyword(s):  
Environmental Factors ◽  
Vascular Plants ◽  
Species Concept ◽  
Diagnostic Value ◽  
Species Concepts ◽  
Genetic Integrity ◽  
Lichenized Ascomycetes ◽  
Morphological Criteria ◽  
The World

AbstractPractically most of the taxonomists working on vascular plants and fungi are using the so-called taxonomic species concept, relying largely on morphological criteria or other observable patterns of discontinuity and assuming that these patterns are reflecting the underlying genetic integrity of species. Such a concept is described in detail here for the genus Usnea. The typologicalview versus the populational view of species are discussed. The diagnostic value of characters used by previous and recent taxonomists of the genus is analysed. The fact that Usnea has such a bad taxonomic reputation is discussed. The use by J. Motyka, author of the world monograph published in the thirties, of characters that are strongly modified by environmental factors together with a typological view of species are thought to be mainly responsible for this. More than 770 names have been published worldwide so far and it is suggested that around 50% are to be considered as synonyms.

Loss of genetic integrity correlates with stocking intensity in brook charr (Salvelinus fontinalis)

2010 ◽  
Vol 19 (10) ◽  
pp. 2025-2037 ◽  
Author(s):  
A. D. MARIE ◽  
L. BERNATCHEZ ◽  
D. GARANT
Keyword(s):  
Salvelinus Fontinalis ◽  
Genetic Integrity ◽  
Brook Charr

scholarly journals ON THE ENSURING OF SURVEILLANCE ON ACCOMMODATION FACILITIES, SPORTS FACILITIES AND LIVING ENVIRONMENTAL FACTORS DURING THE PREPARATION AND HOSTING THE 2018 FIFA WORLD CUP IN MOSCOW

2019 ◽  
pp. 8-13
Author(s):  
E.E. Andreeva ◽  
A.I. Khudoborodov ◽  
T.V. Kosycheva ◽  
A.R. Latypov ◽  
K.M. Zabolotneva
Keyword(s):  
Environmental Factors ◽  
Work Experience ◽  
Water Bodies ◽  
Sports Facilities ◽  
World Cup ◽  
Fifa World Cup ◽  
State Of Water ◽  
The World ◽  
Temporary Accommodation

The paper shows the work experience of the surveillance on accommodation facilities, sports facilities and living environmental factors in Moscow: the state of water and sewage supply city, level of air pollution, water quality of surface water bodies, including water bodies allowed for swimming, soil on the epidemiological important territories and areas of sports facilities. We presented the results of activity to control the sanitary and hygienic condition of sports facilities, temporary accommodation of guests and participants of the World Cup, food quality and environmental facilities.

Loma fontinalis. [Descriptions of Fungi and Bacteria].

2020 ◽  
Author(s):  
D. W. Minter
Keyword(s):  
North America ◽  
Brook Trout ◽  
East Coast ◽  
Salvelinus Fontinalis ◽  
Conservation Status ◽  
Checks And Balances ◽  
Host Cytoplasm ◽  
The Family ◽  
The World ◽  
Host Nucleus

Abstract A description is provided for Loma fontinalis, which infects Salvelinus fontinalis (the brook trout, a fish of the family Salmonidae) in east-coast North America; infections developing in the host cytoplasm (but not in nerve tissues), without diplokarya, and resulting in tumours (also known as 'xenomas') in which the host nucleus is centrally located. Some information on its dispersal and transmission, habitats and conservation status is given, along with details of its geographical distribution (North America (Canada (Nova Scotia))). No evaluation has been made of any possible positive economic impact of this species (e.g. as a recycler, as a source of useful products, as a provider of checks and balances within its ecosystem, etc.), despite its only known host, S. fontinalis, being an invasive in some parts of the world.

Individual Variation in Foraging Movements in a Lake Population of Young-of-the-Year Brook Charr (Salvelinus Fontinalis)

Behaviour ◽  
1995 ◽  
Vol 132 (1-2) ◽  
pp. 57-74 ◽  
Author(s):  
Mark S. Ridgway ◽  
Peter A. Biro
Keyword(s):  
Environmental Factors ◽  
Littoral Zone ◽  
Salvelinus Fontinalis ◽  
Ingestion Rate ◽  
Brook Charr ◽  
Near Shore ◽  
General Variation ◽  
Young Of The Year ◽  
Pattern Of Variation ◽  
Foraging Movements

AbstractWe examined the variation in foraging movements in a population of young-of-the-year (YOY) brook charr living in the near-shore littoral zone of a lake. By repeating the methodology of an earlier stream study, we made direct comparisons between data from lake and stream populations. In general, the pattern of variation in foraging movements was similar between the two sites with greater variability and activity observed in the lake population. The dichotomous nature of the proportion of time spent moving in the stream was also observed in the lake population but in a reversal of the stream pattern. Charr that moved constantly while foraging represented the largest movement category in the lake. In general, variation in foraging movements were more strongly related to the rate of prey rejection, whereas environmental factors, such as distance from shore, submerged objects, and the amount of overhead riparian cover, were more strongly related to prey ingestion. This last finding directly contrasts with that found in the stream literature for YOY charr in still water where ingestion rate, as estimated using feeding attempt rate, increases with the mobility of YOY charr.

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