Download or read book The Effect of Water Quality on the Survival and Fitness of Brook Trout Salvelinus Fontinalis Eggs Alevins and Fry in Aquaculture and Deep Springs Along the South River in Waynesboro VA written by and published by . This book was released on 2016 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt: Brook trout populations have been extirpated in many Virginia streams due to poor water quality thus establishing populations of brook trout for recreational fishing is an important priority of fisheries management. The ability of a stream to protect developing brook trout (Salvelinus fontinalis) eggs and larval fish from adverse effects from acidification and metal toxicity as well as provide needed minerals such as magnesium (Mg2) and calcium (Ca2+) for early-stage development is controlled primarily by geology, which influences water hardness and acid-neutralizing capacity (ANC). The focus of this research was on the effects of Ca2+ and Mg2+ water hardness and ANC on the early stages of developing brook trout as well as parameters such as dissolved nitrogen gas (N2), sulfate concentration (SO42−), and ultra-violet light (UV). In order to more effectively accomplish the objectives, the research was performed in a two-phased study; one phase in the lab and the second phase in-situ. A 107-day laboratory experiment was performed where brook trout eggs and larval brook trout were reared in various levels of Ca2+ and Mg2+ water hardness, ANC and SO42− to determine any differences in survival, growth rate, and yolk-sac to whole-body area ratio. A 31-day in-situ study was performed where brook trout eggs were hatched in South River springs, Montebello Fish Culture Station (MFCS) spring and South River main-stem water to determine how survival is impacted by water quality. Results indicated that when water is high in both Ca2+ and ANC, there was a high survival and growth rate. It was also found that brook trout with a 'home field' advantage, where brook trout hatched in water where the brood stock were reared and spawned for many generations, had high growth rates and the highest survival. This result implies that genetic adaptation to water quality can facilitate improved early-stage survival and growth. Low levels of Ca2+correlate with lower yolk-sac to whole-body ratio, which suggests the importance of available Ca2+ during early development. There were conflicting results regarding SO42− as it was detrimental in the 107-day lab study and beneficial in the 31-day in-situ study. There was increased fitness (higher survival and higher individual growth rate) when SO42− was coupled with Mg2+ as opposed to Ca2+yet the yolk-sac was more depleted when SO42− was coupled with Mg2+ possibly due to the primary uptake method being via diet and not from the environment as it is for Ca2+. For the 31-day in-situ study, a linear regression showed a negative relationship between N2 and percent survival (R2=0.58, p2, UV, ANC, and SO42− (adjusted R2=0.672, p2 but is lacking intermediate values. Due to this gap in data a quadratic regression of only MFCS data was performed which shows that as N2 increases above 100%, survival increases and then begins to decrease rapidly above 103.5% (adjusted R2=0.43, p2 does not have as much of an effect until it reaches higher saturation levels. Springs along the South River have ideal temperature, moderate concentrations of Ca2+ and ANC and do not have excess fine sedimentation however; N2 has a considerable impact on brook trout survival during the early stages of development. This research helps identify some concerns regarding spawning habitat for the establishment of a brook trout population in the South River and it demonstrates the importance of aquaculture in fisheries management as well as furthering the understanding of early-stage development.
Download or read book Fine Sediment Effects on Brook Trout Egg and Alevin Survival in Virginia written by David G. Argent and published by . This book was released on 1995 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spawning Behavior and Strain Tolerance of Brook Trout Salvelinus Fontinalis Mitchill in Acidified Water written by David William Johnson and published by . This book was released on 1975 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Temperature Effects on the Routine Metabolic Rates of Brook Trout Salvenius Fontinalis Eggs Alevin and Fry written by Catharine Jean Cook and published by . This book was released on 2017 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: Early developmental stages of cold-adapted ectotherms such as brook trout (Salvelinus fontinalis) are atrisk of mortality with increasing water temperatures because of their sensitivityto changes in their environment.I studiedthe mass and routine metabolic rate(RMR) of wild-origin brook trout eggs, alevin and young fry reared at normal (5°C) and elevated (9°C) temperaturesfor the duration of the study or at mismatched temperatures.This setup determinedif preconditioning acclimation for one temperature benefits or hinders the organism later in life.Three levelsof biological organization (ancestry, population, family) were studied using Akaike?sInformation Criterion (AIC) to identify models that best accountedforvariation in thedata.Family, massand temperature were most important inpredictingbody mass and mass-adjustedRMR, although population and ancestral-level differences were also detected atsome life stages.Strongvariation in body mass and mass-adjusted RMRamong families may indicate adaptive potential within brook trout populations to respond to increases in water temperaturewithclimate change.Keywords: Temperature, physiology, brook trout, Salvelinus fontinalis, thermal tolerance, acclimation, routine metabolic rate, environmental matching, AIC.
Download or read book Studies on the Water Quality Impacts of Brook Trout Salvelinus Fontinalis Transport written by Meghan Penney and published by . This book was released on 2003 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hatching Growth Major Ion Concentrations and Osteological Development of Brook Trout Salvelinus Fontinalis Alevins Exposed to Soft Acidic Water written by Mark Thomas Steingraeber and published by . This book was released on 1987 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Brook trout (Salvelinus fontirtalis) eyed-eggs and fry were continuously exposed (
Download or read book Effect of Acidic Lake Water on Survival of Aurora Trout Salvelinus Fontinalis Embryos and Alevins written by Edward J. Snucins and published by Ontario, Ministry of Natural Resources. This book was released on 1988 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Water Stress in Plants written by Ismail M. M. Rahman and published by BoD – Books on Demand. This book was released on 2016-08-24 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water stress in plants is caused by the water deficit, as induced possibly by drought or high soil salinity. The prime consequence of water stress in plants is the disruption in the agricultural production, resulting in food shortage. The plants, however, try to adapt to the stress conditions using biochemical and physiological interventions. The edited compilation is an attempt to provide new insights into the mechanism and adaptation aspects of water stress in plants through a thoughtful mixture of viewpoints. We hope that the content of the book will be useful for the researchers working with the plant diversity-related environmental aspects and also provide suggestions for the strategists.
