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 22 for “"fish larvae"”.
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Trophic Ecology of Mesopelagic Fish Larvae and Juveniles in the Northern Gulf of Mexico
… the volume of the Gulf of Mexico. Deep-pelagic fishes are important prey for many oceanic consumers, but relatively little is known about their early life history, including larval fish trophic ecology. An understanding of the role deep-pelagic fish larvae have in oceanic food webs is important …
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Investigations into some important fish larvae in the south east Atlantic in relation to the hydrological environment
… temperature and salinity ranges for the larvae. (iv) an examination of seasonal shift in location and intensity of spawning from the geographic distribution, abundance and size composition of the larvae. (v) the establishment of dispersal trends of developing larvae from the spawning …
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Water quality requirements for first-feeding in marine fish larvae of the Cape of Good Hope, with description of developmental stages
The tolerance of marine fish larvae to NH₃, NO₂⁻, NO₃⁻, H⁺, OH⁻, O₂, and CO₂ was investigated using the decrease in first-feeding incidence following a 24-h exposure as the criterion of response. Ten species, all hatched from pelagic eggs collected at sea, were used in the studies: two soleids …
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Mechanistic models of recruitment variability in fish populations.
… worldwide about the decline of exploited fish stocks. The number of fish larvae surviving to be recruited into the adult population each year is fundamental to the long-term stability of a fish stock. Monitoring and predicting recruitment is a crucial component of managing economically …
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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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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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LARVAL FISH EXPORT IN RESPONSE TO VARYING COMPENSATING GATE DISCHARGE AT THE SAULT RAPIDS, ST. MARYS RIVER
… 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. Water …
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Quantitative and qualitative aspects of the protein nutrition of barramundi (Lates calcarifer) larvae fed formulated foods
… drawbacks associated with live foods used for larvae fish culture. Artificial formulations also provide a vehicle for accurate manipulation of nutritional constituents, enabling investigations into the nutrient requirements of fish larvae. In order to develop species-specific larval food …
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Technology Development for the Functional and Structural Analysis of the Brain
… constructing a partial connectome of the zebrafish brain. In functional studies, methods to study cell dynamics have relied on the use of electrodes or dyes. Genetically encoded indicators have gained popularity because they are non-invasive and targetable. We focus on potassium as it’s …
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The Dynamics of Wave-Driven Reef Pass Jets and Coral Population Recovery on an Island
… replenish nutrients, transport coral and fish larvae between populations, and moderate temperatures. On many reefs, wave-driven or tidal flow through reef passes is the dominant mechanism of exchange with the open ocean. The fate of the jet as it flows onto the forereef slope, however, is …
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Dispersion of material by wind and tide in shallow seas
… and biological material (e.g. phytoplankton and fish larvae). This study aims to further investigate the processes of wind-driven Langmuir circulation and bottom-generated turbulence and to quantify the effects they have on the dispersion of buoyant material. A numerical and analytical study is …
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Field and laboratory studies suggest that recruitment of the invasive common carp is controlled by native fish in Stable Lakes of the Upper Mississippi Basin.
… an ecological disturbance that alters the fish community. It has been hypothesized that recruitment of carp is limited by native predatory fish and that carp are only able to recruit in habitats where these native species have been excluded due to winter hypoxia. We tested this hypothesis …
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Patterns of variation in the benthic macroinvertebrate community of the Upper Columbia River, WA
… concern due to hypothesized starvation of native fish larvae. The population of white sturgeon (Acipenser transmontanus) which inhabits the Upper Columbia and feeds primarily on BMIs has been experiencing high mortality rates at the onset of exogenous feeding, leading to chronic larval recruitment …
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The Effects of Stocking Density and Feeding Frequency on Aggressive and Cannibalistic Behaviors in Larval Hatchery-Reared Spotted Seatrout, <i>Cynosion nebulosus</i>
… (<em>Cynoscion nebulosus</em>) is a euryhaline fish that inhabits coastal regions from Massachusetts to Texas. Due to its predaceous nature and proximity to coastal shorelines it is the most important marine finfish in the Gulf of Mexico. Because of this importance, Spotted Seatrout has been …
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Practical diet formulation for common carp (Cyprinus carpio) and walking catfish (Clarias macrocephalus) larvae in Thailand
… need for the development of formulated diets for fish larvae. The present study was conducted in Thailand on common carp (Cyprinus carpio) and walking catfish (Clarias macrocephalus) larvae with the following objectives: 1) To assess the nutritive values of several available feed ingredients when …
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Status and Distribution of Fishes in Tributaries of the Garrison Reach of the Missouri River, North Dakota
… sediment, and biota). Tributaries often support fish assemblages unique from the mainstem and also serve as alternate habitats for mainstem fish species during various life history stages (i.e. spawning and rearing). To better understand the role of tributary streams within the Garrison Reach …
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Parental and environmental effects on the early life history of a tropical reef fish, Amphiprion melanopus
Tropical coral reef fish larvae are characterised by high mortality, which is predominantly driven by size- and growth- selective processes. While recent studies of environmental correlates have explained 7 - 36 % of the variation in larval growth rate in wild populations, the majority of the …
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Uji patogenisitas beberapa isolat SlNPV (Spodoptera litura Nuclear Polyhedrosis Virus) terhadap tingkat mortalitas ulat grayak (Spodoptera litura F.) pada tanaman kedelai (Glycine max L.)
… isolates SlNPV on the level of mortality of larvae of S. litura on soybean. The study was conducted from April to July 2010, at the Laboratory of Pest and Disease Plant Protection Department of the Indonesian Legumes and Tuber Crops Research Institute Kendalpayak-Malang. The design used in …
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Predicting water quality effects on bay anchovy (Anchoa mitchilli) growth and production in Chesapeake Bay: linking water quality and individual-based fish models
… quality is well predicted; however the effect on fish is generally unknown as most water quality models do not include trophic levels higher than zooplankton. I combined two water quality models with bay anchovy models (Anchoa mitchilli) to examine the effects of changes in nutrient loadings on …
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Pemanfaatan minyak biji jarak pagar (Jatropha curcas L.) sebagai insektisida nabati terhadap mortalitas larva Spodoptera litura F. (ulat grayak)
… accession 2M IP and IP 2A on mortality of larvae of S. litura, (2) know the solution concentration of oil seed jatropha (J. curcas), which effectively influence the mortality of S. litura, (3) know the time that is most effective in improving mortality of larvae of S. litura, (4) understand …
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