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Energetic Response Of Juvenile Coho Salmon Oncorhynchus Kisutch To Varying Water Temperature Regimes In Northern California Streams
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Book Synopsis Energetic Response of Juvenile Coho Salmon (Oncorhynchus Kisutch) to Varying Water Temperature Regimes in Northern California Streams by : Wendall Scott Willey
Download or read book Energetic Response of Juvenile Coho Salmon (Oncorhynchus Kisutch) to Varying Water Temperature Regimes in Northern California Streams written by Wendall Scott Willey and published by . This book was released on 2004 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Environmental Variables Influencing Downstream Migration of Juvenile Coho Salmon (Oncorhynchus Kisutch) in Three Northern California Streams by : Jennifer E. Feola
Download or read book Environmental Variables Influencing Downstream Migration of Juvenile Coho Salmon (Oncorhynchus Kisutch) in Three Northern California Streams written by Jennifer E. Feola and published by . This book was released on 2007 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book California Fish and Game written by and published by . This book was released on 2012 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Canadian Journal of Fisheries and Aquatic Sciences by :
Download or read book Canadian Journal of Fisheries and Aquatic Sciences written by and published by . This book was released on 2006 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Extended Freshwater Rearing of Juvenile Coho Salmon (Oncorhynchus Kisutch) in Northern California Streams by : Benjamin O. Ransom
Download or read book Extended Freshwater Rearing of Juvenile Coho Salmon (Oncorhynchus Kisutch) in Northern California Streams written by Benjamin O. Ransom and published by . This book was released on 2007 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Logging on Growth of Juvenile Coho Salmon by : Paul M. Iwanaga
Download or read book Effects of Logging on Growth of Juvenile Coho Salmon written by Paul M. Iwanaga and published by . This book was released on 1973 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Winter Food Habits of Coastal Juvenile Steelhead and Coho Salmon in Pudding Creek, Northern California by : Heather Anne Pert
Download or read book Winter Food Habits of Coastal Juvenile Steelhead and Coho Salmon in Pudding Creek, Northern California written by Heather Anne Pert and published by . This book was released on 1993 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Overwinter Survival and Movement of Juvenile Coho Salmon (Oncorhynchus Kisutch) in Relation to Large Woody Debris and Low-velocity Habitat in Northern California Streams by : John D. Deibner-Hanson
Download or read book Overwinter Survival and Movement of Juvenile Coho Salmon (Oncorhynchus Kisutch) in Relation to Large Woody Debris and Low-velocity Habitat in Northern California Streams written by John D. Deibner-Hanson and published by . This book was released on 2019 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: Some studies suggest that Coho Salmon populations are limited by overwinter survival as a result of insufficient winter habitat. While many small-scale projects aim to define reach and basin-level habitat requirements for Coho Salmon, large-scale studies that assess multiple independent populations remain few. For my research, I quantified large woody debris (LWD) by volume and low-velocity rearing habitat (LVH) as percent area in three coastal watersheds of similar size in northern California to untangle the relationships between Coho Salmon overwinter survival, emigration timing and specific winter habitats. I used mark-recapture techniques with PIT tags to formulate Cormack-Jolly-Seber models for each of three years (2013-2015) to (1) estimate apparent overwinter survival of juvenile Coho Salmon populations, (2) determine to what extent outmigration timing varies among basins, and (3) evaluate the relationships between reach-specific survival, movement and winter habitat. LWD volume ranged from 47.8 to 109.9 cubic meters per kilometer among stream reaches while LVH area spanned from 9.3% to 23.6% of total stream area per reach. Effects of LWD on apparent overwinter survival and early emigration were absent during all three years of the study. Effects of LVH were not observed during 2013 and 2014. In 2015, LVH correlated positively with apparent overwinter survival and negatively with emigration. Larger Coho Salmon had higher apparent overwinter survival rates than small fish, whereas smaller fish had greater emigrations rates before spring. Mean apparent overwinter survival varied by basin from 0.052 to 0.567 but basins maintained consistency across years. Early emigration rates ranged even further by basin (0.023-0.773). Variation in both apparent overwinter survival and early emigration was much greater among basins than within basins. A lot remains to be learned regarding how habitat affects the migratory behavior of Coho Salmon in California and these results suggest the effects may vary significantly by stream. The drastic life history differences observed in neighboring Coho Salmon populations demonstrate the plasticity in a species once thought to be relatively inflexible. Moving forward, incorporating multi-basin approaches should be considered when evaluating freshwater survival and movement to inform large-scale restoration and conservation.
Book Synopsis The Energetic Response to Handling Stress in Juvenile Coho Salmon (Oncorhynchus Kisutch) by : Lawrence Edward Davis
Download or read book The Energetic Response to Handling Stress in Juvenile Coho Salmon (Oncorhynchus Kisutch) written by Lawrence Edward Davis and published by . This book was released on 1993 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: Various aspects of the energetic response to handling stress in juvenile coho salmon (Oncorhynchus kisutch) were examined. Fish were subjected to four different handling stressors in a Blazka-style respirometer. Stressed fish had rates of oxygen consumption that were higher than controls. The magnitude of the increase ranged from 139 to 198% of the control value, and appeared roughly related to the severity of the stressor. The post-stress increase in oxygen consumption also appeared to vary seasonally, with less of a stress effect on respiration observed in the spring as compared to the fall. Elevation in oxygen consumption following stress was largely eliminated within 1 h post-stress, but metabolic rate may have remained slightly elevated for an additional 2 h. Plasma cortisol and lactate titers also increased significantly following handling stressors. Oxygen consumption was positively correlated with both plasma cortisol and lactate after a moderate stressor, but no correlation was found after more severe stressors. Whole body lactate concentration was significantly elevated following stress, reaching levels almost 500% higher than controls. By 5 h post-stress whole body lactate had returned to control levels. The mechanism of excess post-stress oxygen consumption remains unclear. Fish given exogenous cortisol did not experience an increase in oxygen consumption, so it is unlikely that cortisol alone has a major effect on metabolic rate. Similarities between the energetic responses to both stress and exercise suggest that the results of exercise physiology may provide a basis for understanding the energetic response to stress.
Book Synopsis Historical and Current Presence-absence of Coho Salmon (Oncorhynchus Kisutch) in the Central California Coast Evolutionary Significant Unit by : Peter Burton Adams
Download or read book Historical and Current Presence-absence of Coho Salmon (Oncorhynchus Kisutch) in the Central California Coast Evolutionary Significant Unit written by Peter Burton Adams and published by . This book was released on 1999 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This report is a summary of the presence and absence of coho salmon, Oncorhynchus kisutch, in streams in the Central California Coast Evolutionary Significant Unit (ESU). Only streams with historical records of coho occupancy are considered. It has been prepared to assist in Endangered Species Act activities... Presence absence data used here come from surveys conducted for this study and fron data collected by other researchers. A preliminary report of this data, which included only approximately one-half of these streams, was published earlier... to meet earlier listing requirements."--p.Abstract.
Book Synopsis Evaluation of Stream Temperature Regimes for Juvenile Coho Salmon in Redwood Creek Using Thermal Infrared (California) by : Vicki Ozaki
Download or read book Evaluation of Stream Temperature Regimes for Juvenile Coho Salmon in Redwood Creek Using Thermal Infrared (California) written by Vicki Ozaki and published by . This book was released on 2005 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Species profiles by : Thomas J. Hassler
Download or read book Species profiles written by Thomas J. Hassler and published by . This book was released on 1987 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Growth and Food Consumption of Juvenile Coho Salmon Exposed to Natural and Elevated Fluctuating Temperatures by : Larry B. Everson
Download or read book Growth and Food Consumption of Juvenile Coho Salmon Exposed to Natural and Elevated Fluctuating Temperatures written by Larry B. Everson and published by . This book was released on 1973 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: The growth and food consumption of juvenile coho salmon [Oncorhynchus kisutch (Walbaum)] exposed to natural and elevated fluctuating temperatures were studied in the laboratory with wild fish collected from a salmonid rearing stream. Control temperatures were similar to the temperature regime of a natural stream and the elevated temperatures were increased incrementally 3-4 C and 7-8 C. Short-term, 30-day experiments were conducted during five different seasonal periods in 1969 and 1970. Concurrent long-term studies were carried out during the entire experimental period. Relationships between rates of food consumption, growth and food assimilation of the fish were determined for the different experimental temperature conditions during the short-term experiments. Relationships between maintenance ration and temperature were derived from curves relating rates of food consumption and growth. The efficiency of food assimilation was determined from measurements of the quantities of the food consumed and the amounts of fecal wastes produced. Caloric measurements were obtained from oxygen bomb calorimetry of the fish and food consumed, and from wet combustion of the fecal wastes collected during short intervals within each experiment. Bioenergetic measurements were used to estimate the major fates of the energy of food consumed under the different temperature conditions during a period of fluctuating high summer temperatures. Long-term studies were conducted over eight-month and four-month periods under temperature conditions similar to those of the short-term experiments. Growth rates of the juvenile coho salmon were obtained from measurement of changes in their wet weight during 15-day intervals. The growth rates of salmon at equivalent ration levels were compared between the short- and long-term experiments. Growth rates of juvenile coho salmon kept as controls were generally greater than those of fish exposed to elevated temperatures for each of the five short-term experiments. Increases of ration size generally ameliorated the effects of elevated temperatures on the salmon growth rates. Comparisons of the caloric values of coho salmon recorded for a natural rearing stream with those of experimentally fed fish suggest that wild fish subsist on a restricted ration. Results of the long-term studies showed that salmon exposed to naturally fluctuating temperatures in the laboratory and fed restricted rations reached sizes typical of downstream smolts in Oregon coastal streams, whereas the fish exposed to incremental temperature increases of 3-4 C and 7-8 C were respectively 25 and 47 percent smaller than the control fish. Comparison of results of studies based upon naturally fluctuating temperatures with those of other workers based upon constant temperatures indicates that at average temperatures above 20 C the fluctuation of temperature is favorable for coho salmon growth. The results of the study suggest that temperature criteria for juvenile coho salmon derived from measurements based upon constant temperatures may not be satisfactory for protecting the fish during the extended period of their freshwater existence. Measurements of the growth of the young salmon during long-term experiments indicated that any substantial increases of temperature would result in a reduction in the size of smolts. Significant reductions of juvenile salmon growth resulting from elevated stream temperatures could influence the production of salmon populations through decreased marine survival. Long-term studies of the fish as well as other components of stream communities influenced by elevated temperatures are necessary for establishing meaningful temperature criteria.
Book Synopsis Diet and Prey Consumption of Juvenile Coho Salmon (Oncorhynchus Kisutch) in Three Northern California Streams by : Eric J. Gonzales
Download or read book Diet and Prey Consumption of Juvenile Coho Salmon (Oncorhynchus Kisutch) in Three Northern California Streams written by Eric J. Gonzales and published by . This book was released on 2006 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Elevated Water Temperature on Some Aspects of the Physiological and Ecological Performance of Juvenile Chinook Salmon (Oncorhynchus Ishawytscha) by : Keith Richard Marine
Download or read book Effects of Elevated Water Temperature on Some Aspects of the Physiological and Ecological Performance of Juvenile Chinook Salmon (Oncorhynchus Ishawytscha) written by Keith Richard Marine and published by . This book was released on 1997 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Landscape Approach to Determining and Predicting Juvenile Coho Salmon (Oncorhynchus Kisutch) Movement Timing and Growth Patterns Prior to Ocean Entry by :
Download or read book A Landscape Approach to Determining and Predicting Juvenile Coho Salmon (Oncorhynchus Kisutch) Movement Timing and Growth Patterns Prior to Ocean Entry written by and published by . This book was released on 2016 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coho salmon (Oncorhynchus kisutch) rely on unique habitats during the winter season, which may dictate how much individuals may growth and when migration from freshwater rearing habitat to the ocean occurs. Here I analyze movement timing and growth patterns for coho salmon through a field-based study and a literature review. For the field portion, I examined hatchery-stocked juvenile coho salmon across four stream basins in the Russian River watershed, California to determine the relative importance of climate, landscape, and fish size metrics in predicting movement and growth patterns over a winter rearing and spring smolt outmigration time period (December 2014-June 2015). I observed three unique movement strategies: winter parr movement, spring smolt movement, and inter-tributary movement. Movement was predicted in relation to daily temperature and precipitation, followed by in-stream and upslope basin conditions in random forest modeling. Specifically, fish that moved later were associated with basins that contained higher productivity and low-gradient floodplain habitats, while fish that moved earlier came from streams that lacked invertebrate prey and had limited low-gradient rearing habitat. Fish size and timing of movement were the primary predictors of growth, with relatively larger fish in the spring growing faster than fish that were relatively smaller prior to winter. These relationships suggest that hatchery-release fish are still highly influenced by environmental conditions once released, especially in terms of initial seasonal movement, and that watershed conditions should be considered when utilizing hatchery-rearing programs to supplement wild fish populations. In North America, coho salmon populations are distributed from Alaska through California, and may exhibit unique movement and growth patterns in relationship to population-scale vulnerability (Endangered Species Act listing), basin area, and availability and types of rearing habitat. For the second part of my thesis, I conducted a literature review to assess what factors are commonly considered in predicting movement and growth patterns for these fish, as well as the types (season and life stage) and number of movement strategies reported. Eighteen studies were summarized, of which sixteen identified unique movement strategies, ranging from one to four. Despite a wide range of basin areas and latitudes, winter parr and spring smolt movements were commonly observed, with authors primarily relating these behaviors to in-stream habitat and fish size metrics. Additionally, growth was linked positively and primarily with off-channel winter rearing, which may outweigh the importance of fish size in predicting growth when high quality rearing habitats are available during the winter season. Recognizing movement timing diversity and its drivers can help recover threatened coho salmon populations. More widely distributed populations may have unique phenotypic expressions based on localized genetic and environmental interactions, increasing diversity and overall stability across the population, a concept known as the portfolio effect. Understanding fish-habitat relationships can aid recovery efforts by providing a framework of climatic and watershed conditions that support unique behaviors, even in already severely limited populations.
Book Synopsis Species Profiles by : Thomas J. Hassler
Download or read book Species Profiles written by Thomas J. Hassler and published by . This book was released on 1987 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
