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Showing 1 to 20 of 52 for “"Larval fish"”.
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Larval Fish Assemblages of Three Eastern South Dakota Rivers
… in eastern South Dakota, highly unpredictable. Fishes in these streams have adopted reproductive strategies that allow for rapid recolonization after frequent and sometimes intense floods and droughts. New stresses, such as the recent introduction of the invasive Bighead Carp Hypophthalmichthys …
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Distribution, Relative Abundance, and Reproductive Seasonality of Larval Fish in the Red River
… are crucial factors that affect survival of larval fish. To understand temporal and spatial variation in larval fishes in the Red River, samples were collected from the Red River and North Dakota tributaries using ichthyoplankton nets. Collections were made during the spring and summer of …
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Larval fish assemblages of selected estuarine and coastal systems in Kwazulu-Natal, South Africa
This study focuses describing assemblages of fish larvae occurring in potential nursery habitats and elucidating the recruitment processes of fishes in the KwaZulu-Natal region. The composition, the degree of estuarine-association of all taxa, temporal and spatial abundance patterns, developmental …
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Evaluation of the Larval Fish Community in the Missouri River Below Garrison Dam, North Dakota
… to 13.9°C by mid-August. Two hundred three larval fishes were collected in 1993; in 1994, 523 larval fishes were collected. Overall catch per unit of effort (CPUE) was 0.018 larvae/m3 in 1993 in a net with 0.360 mm mesh (bar measure). In 1994, I collected 0.028 larvae/m3 in the 0.360 mm mesh …
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Larval fish abundance and habitat associations in backwaters and main channel borders of the Kanawha River
Larval fish distributions were determined in the lower Winfield Pool, Kanawha River, West 85, Virginia, using a 0.5-m plankton net and a 1-m<sup>2</sup> dropbox. Five habitats were sampled with the plankton net, 3 habitats with the dropbox. The 5 deep water water habitats, greater than 1.5-m in …
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LARVAL FISH EXPORT IN RESPONSE TO VARYING COMPENSATING GATE DISCHARGE AT THE SAULT RAPIDS, ST. MARYS RIVER
… information on how flow variability influences larval fish drift. I estimated annual larval fish export in relation to variable discharge during 2018-2021 and compared results to published habitat model predictions. Mean discharge and water temperature were lowest in 2021 and highest in 2019. …
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INTERANNUAL VARIABILITY IN MORPHOMETRIC CONDITION OF LARVAL FISH AS A FUNCTION OF ENVIRONMENTAL VARIABLES IN BEAUFORT, NC
… influenced by oceanic conditions experienced by fish larvae. Variations in larval abundance and condition have not been consistently related to juvenile abundance and recruitment for many fisheries species. By studying how environmental factors affect larval fish condition, we may be able to …
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Exploring physical, biological, and behavioral processes that affect larval fish distribution in the pelagic zone of Lake Michigan
The growth and survival of larval fish are influenced by a suite of biotic and abiotic factors. Because aquatic systems are characterized by strong heterogeneity in biotic and abiotic conditions along a vertical gradient, the vertical distribution of larval fish can profoundly affect their growth …
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Influence of Natural and Anthropogenic Environmental Variability on Larval Fish Diet, Growth, and Condition in the Northcentral Gulf of Mexico
… other sources. Early life history stages of fishes are especially vulnerable to environmental variability created by freshwater discharge. The objectives of this study were to describe the available prey field, diet, growth and condition of larval fishes with respect to various effects of …
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Distribution of larval fishes in the Winfield Pool, Kanawha River, and direct impacts of commercial navigation traffic on larval fish survival
Distributions of larval fishes in the Winfield Pool, Kanawha River, West Virginia, were determined by sampling two sites with bongo and push nets. Cyprinids, clupeids, and <i>Aplodinotus grunniens</i> dominated collections. Main channel densities were a fraction of the densities along the …
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Characterization of Soundscapes in Shallow Water Habitats of the Florida Keys (USA) and Their Influence on the Settlement of Larval Fish and Invertebrates
… restoration on underwater soundscapes and larval recruitment. I had four main objectives: (1) characterize the underwater soundscapes of three near-shore, benthic habitats: mangrove islands, seagrass meadows, and hard-bottom (Chapter 2); (2) quantify larval settlement within healthy, …
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Use of main channel and shallow-water habitat by larval fishes in the lower Missouri River
… organized in a spatial hierarchy to characterize larval fish nursery habitat within the lower Missouri River. Native carpsucker spp./buffalo spp. (Carpiodes spp./Ictiobus spp.) and chub spp. (Macrhybopsis spp.) catch-per-unit-effort (CPUE) was higher within sandbar aquatic terrestrial transition …
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The Vernal And Summer Zooplankton In Surface Waters From A Small Cove In Stockton Reservoir
… of the change may have been due to predation by larval fish. During 1975, zooplankton were most dense during May when larval fish were uncommon and were least dense in July when larval fish were most abundant. Although their correlation is not significant, fewer zooplankton were collected where …
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Spatial and temporal distribution of larval fishes in a large tidal river.
There are few published studies of larval fish assemblages from unregulated, tidal freshwater rivers. Patterns in the spatial and temporal distribution of larval fishes in the Mattaponi River were examined. Sampling took place on a weekly basis from February through August, 2006 and 2007. Larval …
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Towards less hazardous chemicals : identifying chemical bioactivity through fish behavioral profiles.
… risks to public health and the environment. When larval fish models are employed with automated tracking technologies, behavioral studies can be used to perform rapid, diagnostic toxicity screens for large volumes of chemicals. Beyond utility in chemical safety screening applications, behaviors …
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Interference in White Bass Reproduction by Two Introduced Predators in Barren River Lake, Kentucky
… bass. In the springs of 2012 and 2013 I sampled fish from within a five kilometer stretch of Barren River upstream of the lake. I collected 144 white bass, 111 yellow bass and 29 hybrid striped bass. Detection of species at spawning sites was staggered with yellow bass and hybrid striped bass …
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Investigation into three potential modifying factors in larval fathead minnow (Pimephales promelas) growth and survival
The responses of larval fish to toxicants in subchronic toxicity tests may be modified by events and stressors not associated with the toxicants themselves. In the following work, three potential modifying factors related to larval fish growth, survival, and response to toxicant stress were …
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Recreational disturbance of a desert stream fish community: Detecting ecological effects of environmental impact
Fish assemblages in 22 pools were sampled over the summer of 1997 in the North Fork of the Virgin River, Zion National Park, Utah, to assess effects of recreational activities on native fish communities. Pools experiencing high levels of wading and float tubing contained altered population …
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The Occurence, Abundance and Distribution of Populations of Larval Fishes in Wheeler Reservoir, Alabama
This study of the larval fishes of Wheeler Reservoir deals with the data from the first year (1971) of a continuing, preoperational icthyofaunal monitoring program in the area of the Browns Ferry Nuclear Electric Generating Plant on Wheeler Reservoir, Alabama. The larval fish study is one part of a …
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Zooplankton and Ichthyoplankton in a Power Plant Cooling Reservoir
… other areas of the reservoir. Spawning times and larval fish growth rates were similar to those in other northern lakes. The number of ichthyoplankton in entrainment water is similar to that estimated in reservoir. Lepomis spp. made up 90.5% of the total number entrained. An estimated 100% of all …
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