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Showing 1 to 20 of 25 for “"Ichthyoplankton"”.
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Zooplankton and Ichthyoplankton in a Power Plant Cooling Reservoir
… and entrainment mortality of zooplankton and ichthyoplankton were studied in the Big Stone Power Plant cooling reservoir, South Dakota, from January 1979 to April 1980. Mean annual density and biomass of zooplankton for 1979 were 15.8 organisms/liter and 384.7 ug/liter respectively. Cyclopoid …
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Influence of Physics on the Distribution of Ichthyoplankton Across the Chesapeake Bay Plume
… features affected the spatial distribution of ichthyoplankton across the Chesapeake Bay Plume. Larval surveys were conducted across the shelf and within the baymouth during August 1988, July and August 1992, and from July through September, 1994. Samples were collected at varying horizontal and …
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DNA-based monitoring of ichthyoplankton for application to fish biodiversity conservation and fisheries management
Monitoring ichthyoplankton communities is essential for assessing fish biodiversity, stock dynamics, and ecosystem health. Traditional morphological identification methods, while valuable, present limitations in terms of taxonomic resolution. DNA metabarcoding has emerged as a powerful alternative, …
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Ichthyoplankton Composition in the Loop Current and Sargassum Habitats in the Northern Gulf of Mexico
<p>Ichthyoplankton in the Gulf of Mexico (GOM) aggregate in two different habitats that serve to provide refuge and concentrate prey in an otherwise oligotrophic environment: the Loop Current (LC) a mesoscale oceanographic feature characterized by the transition of environmental conditions of the …
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Evaluation of the Larval Fish Community in the Missouri River Below Garrison Dam, North Dakota
<p>There is little information on the ichthyoplankton community in the Missouri River below Garrison Dam in North Dakota. In addition, little is known about the effects that the hydropeaking operations of Garrison Dam may have on that community. The objectives of this study were to determine the …
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Composição e distribuição espaço-temporal do ictioplâncton das lagoas Imboassica, Cabiúnas e Comprida, Macaé, RJ
… the variations on the quali-quantitative ichthyoplankton composition of the three lagoons, focusing on its spatial and temporal distribution during a one year period, relating those changes with salinity, temperature and sand bar openings. The collectings were done in pre-detenninate areas …
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Distribution patterns of fish during the planktonic period of their life history
The static and dynamic distribution patterns of ichthyoplankton were investigated over a 4 year period (1981 - 1985) off the coast of Leigh, on the northeastern coast of New Zealand. Emphasis was given to horizontal and vertical distributions, and these were described on scales encompassing broad …
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The Distribution and Abundance of Bluntnose Flyingfish (Prognichthys occidentalis) Across the Gulf of Mexico
… in coastal and offshore environments. Six summer ichthyoplankton cruises were conducted from 2009 to 2011 to investigate ocean influences on the distribution and abundance of flyingfish larvae in the northern Gulf of Mexico (NGoM). Over the three-year sampling period, a total 9,533 bluntnose …
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Fish spawning strategies in the variable southern Benguela Current region
… a multiple opening and closing RMT sampler. The ichthyoplankton and environmental data were interpreted to reveal any similarity in pattern. Anchovy, hake and laternfish were selected for special attention because of their different spawning strategies, and were shown to have seasonal and spatial …
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Factors Affecting Recruitment of Black Crappies in South Dakota Waters
… crappies were collected with a 500-μrn mesh ichthyoplankton trawl, 1.6-mm mesh trawl, and 13-m.rn bar mesh trap nets. Zooplankton was collected with a 2m tube sampler and then filtered through a 80-μm mesh net. Diets of age-o black crappies collected with the ichthyoplankton net were …
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Deepwater Horizon Impacts on the Diet, Growth, and Condition of Larval Spanish Mackerel (<i>Scomberomerus maculatus</i>)
… the DWHOS event. Using samples from a long-term ichthyoplankton survey off the coast of Alabama, I sought to resolve the effects of the DWHOS on larval fishes. I compared the condition, growth, and diet of larval Spanish Mackerel (<em>Scomberomorus maculatus</em>), collected during summer months …
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Trophic interactions between larval gizzard shad and resident zooplanktivores in Claytor Lake, Virginia
… and negative impacts to these fish species. Ichthyoplankton sampling in 1997 and 1998 showed that peak abundances of larval shad overlapped temporally and spatially with both larval Lepomis spp. and larval alewife Alosa pseudoharengus. Peak larval shad density (0.04-0.06 fish/m3) was two to …
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Taxonomy, Diversity, and Distribution Patterns of Portunid Crab Megalopae in the Northern Gulf of Mexico During Fall of 2003
… of zooplankton is lacking compared to the ichthyoplankton component. In this thesis, identification of Portunidae (Crustacea: Decapoda) megalopae collected during the fall of 2003 from a NOAA SEAMAP cruise revealed 7 species and 11 morphs with 90% of the total density comprised of …
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Distribution, Abundance, and Trophic Ecology of Anguilliform Leptocephali in the Northern Gulf of Mexico
… nitrogen (δ13C and δ15N). A 25-year (1990-2014) ichthyoplankton dataset provided by the National Oceanic and Atmospheric Administration (NOAA) Southeast Area Monitoring and Assessment Program (SEAMAP) was used to examine interannual variations in leptocephalus distribution, abundance, and …
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Factors Regulating Walleye Early Survival and Cohort Strength in Eastern South Dakota Glacial Lakes
… study were to: 1) evaluate the utility of three ichthyoplankton gears for estimating the strength of walleye cohorts at the larval life stage; 2) assess the interaction between yellow perch and walleye during their first year and 3) determine the factors influencing the reproductive success of …
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Comparing the coarse- and high-resolution horizontal and vertical egg distribution patterns of three clupeiform species in the southern Benguela ecosystem
… date, data on high-resolution distributions in ichthyoplankton in the region is lacking. To address this need, coarse and high-resolution ichthyoplankton data were collected using a California vertical egg tow (CalVET) net and a continuous, underway fish egg sampler (CUFES) for horizontal data, …
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Desenvolvimento larval de quatro espécies de Symphurus Rafinesque, 1810 (Osteichthyes, Cynoglossidae) e sua distribuição na costa sudeste/sul do Brasil (23ºS-29ºS)
… larvae and juveniles are described, using the ichthyoplankton samples collected in the southeastern Brazilian Bight (from 23° S to 29° S). Larvae of four species are identified based on distribution pattern of pigments on the margin of dorsal and ventral sides of trunk and on the length of the …
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Assessment of the effects of impingement and entrainment on the fish community of the New River, Virginia
… (Cyprinus carpio) accounted for 94.8% of the ichthyoplankton drift. Estimates of 14.5 to 21.7% of the larvae of selected representative species that drifted by the power station were entrained. The criteria listed by the United States Environmental Protection Agency for assessing the impact of …
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La variabilité inter et intra-annuelle des méduses en Baie de Calvi
… on fisheries by feeding on zooplankton and ichthyoplankton, and, therefore, are predators and potential competitors for fishes. The temporal and horizontal distributions of Medusae in the Bay of Calvi were investigated by an analysis of weekly planktonic time series (2003-2008) collected at …
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Distribution, Relative Abundance, and Reproductive Seasonality of Larval Fish in the Red River
… the Red River and North Dakota tributaries using ichthyoplankton nets. Collections were made during the spring and summer of 1999, 2000, and 2001. Spatial patterns were examined to uncover any variation in a cross section of the river. Common carp Cypritr j carpio, cyprinid spp. and white bass …
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