Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 101 for “"age-0"”.
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GROWTH PATTERNS AND SIZE-GROUP INTERACTIONS IN HATCHERY-REARED AGE-0 LAKE STURGEON
… of the sturgeon was determined both as group averages and for individuals. Separating lake sturgeon by size group had no discernable effect on average growth rates in any of the size categories, but individuals within size groups did show increased growth rates. All three categories ended the …
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Competition Between Age-0 Largemouth Bass And Juvenile Bluegills In A Virginia Pond
… the potential for trophic competition between age-0 largemouth bass and juvenile bluegills by quantifying food resource use similarity in a Virginia recreational small impoundment and by experimentally stocking the species sympatrically and allopatrically in 1.0 m cages and monitoring …
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Growth of Age-0 Atlantic menhaden (BREVOORTIA TYRANNUS) in Two Tidal Freshwater Tributaries of Chesapeake Bay
Few studies have described growth rates of age-0 Atlantic menhaden (Brevoortia tyrannus). Growth rates from tidal freshwater habitats of the Mattaponi and James Rivers, Virginia in 2009 were described and compared using otolith microstructural analyses. Larval tidal freshwater growth rates were …
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Effects of annual thermal regime on growth trajectories of native age-0 brook trout (Salvelinus Fontinalis)
<p>The rapidly increasing temperatures of aquatic systems associated with climate change represent a novel threat to populations of brook trout (<em>Salvelinus fontinalis</em>), and much uncertainty remains about the potential of these populations to acclimate, adapt, or compensate for such …
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Effects of water willow establishment on littoral assemblages in Kansas reservoirs: focus on age-0 largemouth bass
… on density, growth, condition, and diet of age-0 largemouth bass Micropterus salmoides were assessed. Significantly higher densities of age-0 largemouth bass were found in water willow coves, but growth, condition, and diet did not differ between water willow and control coves. Therefore, …
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Thermal Tolerance of Age-0 Gulf of Mexico Striped Bass (<i>Morone saxatilis</i>): Ontogenetic and Genetic Effects
… loci and possibly impacting inferences on parentage. Thermal tolerance challenges were applied in triplicate to offspring mixtures from different crosses. Challenge protocols were based on the Critical Thermal Maximum (CTM) method and were applied on yolk sac larvae (48h post hatching) or on …
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Temporal and spatial patterns of abundance of age 0 threadfin shad (Dorosoma petenense) in Overton Arm, Lake Mead
Temporal and spatial patterns of age 0 threadfin shad (Dorosoma petenense) abundance and growth, in the Overton Arm of Lake Mead, were examined to evaluate the effects of resource availability on the young fish. This was part of the Lake Mead Fertilization Project, designed to assess feasability of …
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Microhabitat use and its effect on growth of age-0 smallmouth bass in the North Anna River, Virginia
… between microhabitat use and growth of age-0 smallmouth bass in the North Anna River. The study objectives were to describe microhabitat use during summer, assess the profitability of microhabitats, and determine if and how microhabitat use could determine which individuals gained a …
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Development and Application of a Spatially-explicit Model for Estimating Growth of Age-0 Pallid Sturgeon in the Missouri River
… the wild, the biotic and abiotic requirements of age-0 Pallid Sturgeon larvae are not fully understood. This knowledge gap has been deemed significant because it is this life stage that is believed to act as a bottleneck to the recovery of the species. The objectives of my study were to 1) …
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Gizzard Shad Reproductive Biology and Predator-Prey Relations with Walleyes in Western South Dakota Reservoirs
… indicated that recruitment to the adult stage was erratic (three cohorts sampled) with age-3 individuals comprising over 80 percent of the sample. I expected winter severity to be the primary factor influencing overwinter survival of age-0 gizzard shad; however, correlations between gizzard …
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Indexing Walleye Recruitment in Eastern South Dakota Natural Lakes
… substantial resources are allocated to their management in eastern South Dakota. For nearly 20 years, fall night electrofishing has been used to monitor age-0 Walleye population parameters, and index future year-class strength in select waters but with limited evaluation. Additionally, knowledge …
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Factors affecting largemouth bass recruitment in a trophy bass reservoir of Virginia, Briery Creek Lake
… (SRR), which could jeopardize the trophy-LMB management goal in BCL. I assessed factors that may limit recruitment of LMB in BCL: angling, predation, competition, growth, and food availability. Age-0 LMB were monitored from nesting through their first summer with nest surveys, light traps, and …
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The Importance of Thermal Habitat Quality for Pumpkinseed (Centrarchidae: Lepomis gibbosus) in Small and Constructed Coastal Embayments Along the Northwest Shoreline of Lake Ontario
… thermal regimes affect growth and survival of age-0 warmwater fishes, and how the thermal habitat quality for such fishes can be improved by altering embayment design. During the warming period of the ice-free season, embayments warm faster than the Lake and so are cooled by exchanges with the …
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Yellow Perch Recruitment and Potential Interactions with Smallmouth Bass in Eastern South Dakota Glacial Lakes
… for ecological understanding and applied management in an aut- and synecological context. Therefore, the objectives of this study were to: 1) estimate the extent of spatial synchrony in production of larval yellow perch; 2) estimate the influence of climatological and hydrological factors on …
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Biotic Impacts in Shallow Water Bodies of South Dakota Resulting From Common Carp Invasion
… and varied effects on zooplankton assemblages. How these alterations in ecosystem functioning affect fishes at higher trophic levels has been insufficiently studied in natural systems, with the exception of effects on relative abundances of sport fishes. Thus, the objectives of this study …
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Interactions between Walleye Sander vitreus and Smallmouth Bass Micropterus dolomieu in Missouri River reservoirs
… Smallmouth Bass and Walleye predation on stocked age-0 Walleye, and 2) comparing diet and stable isotope overlap in Smallmouth Bass and Walleye in systems of varying prey assemblages to assess potential competitive interactions. My first research chapter assessed post-stocking predation on age-0 …
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Interannual Variation in Larval Yellow Perch Abundance in Eastern South Dakota Glacial Lakes and Relation to Sympatric Walleye Populations
… dynamics is a top priority among fishery managers in South Dakota. The objectives of this study were to 1) estimate the magnitude and duration for a decrease in water temperature that would induce mortality of yellow perch eggs, 2) investigate the relation between climatological variables and …
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Entrainment of Rainbow Smelt Through Oahe Dam, South Dakota
… rainbow smelt has been variable, confounding management decisions that require an understanding of prey availability. Biologists are aware that rainbow smelt and other fishes pass through Oahe Dam; however, no attempt has been made to quantify the number of smelt lost. The objectives of this …
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Life History and Bioenergetics of Chinook Salmon in Lake Oahe, South Dakota
… df=5, P=0.0001). Mean back-calculated length-at-age was slightly larger for males than females. A body lengthscale radius intercept for Lake Oahe chinook salmon was determined to be 59.2 mm (r2=0.96, P=0.0001). A total of 529 chinook salmon stomachs were examined for diet composition. The diet of …
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SCAPHIRHYNCHUS STURGEON EARLY-LIFE HISTORY
… of sturgeon autecology during all life stages, especially during early life when high mortality occurs. To begin to understand sturgeon early-life history I determined river of origin on a multi-basin scale (i.e., potential rivers of origin). I then determined habitat needs and early life …
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