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Showing 1 to 20 of 25 for “"Fisheries biology"”.
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The fisheries biology of two scallop species, Pecten maximus (l.) and Aequipecten opercularis (l.), in the waters around Shetland, Scotland.
… were incorporated into the fisheries assessment. The assessment<br/>indicates poor catches of A. opercularis for many years, and a recovery in<br/>abundance of P. maximus on some fishing grounds since the low catches<br/>experienced in 2000.
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Aspects of the biology of Trypanorhynch tapeworms and investigations on their use as biological tags
… 1935-1985 were researched for information on the biology of trypanorhynchs, and a publishable host-parasite list was compiled for this period as a complement to the only previous monograph (published forty-five years ago) on all known members of the order Trypanorhyncha (Platyhelminthes: Cestoda). …
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Age, Growth, and Reproduction of Vermilion Snapper (<i>Rhomboplites aurorubens</i>) in the North-Central Gulf of Mexico
<p>Vermilion Snapper is a commonly harvested species of reef fish in the northern Gulf of Mexico (GOM). It supports both a large commercial and popular recreational fishery, however knowledge of this fish’s life history is limited spatially. Non-linear curve fitting was used to estimate growth …
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The effects of light level and temperature on freshwater microbial biomass, production, enzyme activity, and community composition
<p>Algae can stimulate the production of heterotrophic microbes in periphyton communities, but the synergistic effects of light and temperature on this phenomenon are not well understood and have implications on carbon cycling and energy flow. We employed recirculating mesocosms held at different …
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A Histopathological Review of Immune Response in Largemouth Bass to Parasitic Infections of Soft Tissues
<p>The immune response can serve as a key indicator of a fish’s overall health and the effect stressors have on the health of the fish. Anthropogenic factors can stress a fish’s immune system and inhibit immune responses. This study investigated the response of eosinophilic cells and macrophage …
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The Comparative Effects of a Thermal Gradient on the Age and Growth Characteristics of Largemouth Bass (Micropterus Nigricans), and Atlantic Cod (Gadus Morhua)
… from peer-reviewed journals, state records, and fisheries agencies. For Largemouth Bass, I analyzed the relationships between air temperature (MAT<sub>min</sub>°C, MAT24hr°C, and MAT<sub>max</sub>°C), and growth parameters including maximum length and weight, growth rate (K), longevity, and total …
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Steps towards successful cryopreservation of fish gametes: improving laboratory protocols in the Zebrafish model to increase gamete viability and efficiency
<p>Cryopreserervation is a powerful tool for the long term storage of genetic material from endangered species. While mammalian gametes have long been freezable, eggs and embryos from fish have yet to be successfully frozen. Furthermore, protocols for freezing fish sperm have low success rates. In …
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Assessment of Largemouth Bass (Micropterus Salmoides) Condition Using Liver Histopathology, Health Parameters and Water Quality Of The Central Chattahoochee River Watershed
<p>The health of Largemouth bass from west-central Georgia was assessed using liver histopathology and the degree of tissue change index (DTC), hepatosomatic indices (HSI), relative weight, condition factors, and intersex. These health parameters as well as water chemistry data were compared across …
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Reproductive Life History of <i>Fundulus jenkensi</i> and Comparative Development of Five Sympatric Fundulid Species
<p><em>Fundulus</em> <em>jenkinsi</em> is recognized federally and within the state of Mississippi as a Species of Concern. Little is known about the life history of this coastal killifish, but a detailed reproductive histology study of <em>F. jenkinsi</em> and a diagnostic key of the early life …
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Lack of Delayed-Type Hypersensitivity in Striped Bass (<i>Morone saxatilis</i>)
<p>Mycobacteriosis is a fatal disease in fishes caused by acid-fast bacteria in the genus <em>Mycobacterium</em>. This disease impacts aquaculture, aquariums, and wild fishes. Unfortunately, there are currently no non-lethal diagnostic tests for mycobacterial infection in fishes. Type IV delayed …
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The impacts of embryo development and asynchronous hatching on morphology, growth, and development of larval burbot (Lota lota).
<p>Burbot (<em>Lota lota)</em> are native fish in Lake Superior and typically spawn during the winter under the ice or by migrating up rivers. The early life history of larval burbot, where they dispurse, how fast they develop, and what their survival rates have not been extensively studied. …
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Analyzing the diet composition of Lake Trout (Salvelinus namaycush) in Upper Priest Lake
<p>Lake Trout (Salvelinus namaycush) were intentionally introduced to the Priest Lake system in 1925 with the intentions of creating a recreational fishery. As the Lake Trout population increased within this system, the native Bull Trout (Salvelinus confluentus) population began to decline. …
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USING ACOUSTIC TELEMETRY TO ANALYZE THE IMPACTS OF COMMON CARP ON WILD RICE RESTORATION
<p>Wild rice (<em>Zizania palustris</em>) is an important cultural, spiritual, and dietary resource to Lake Superior Ojibwe. Common Carp (<em>Cyprinus carpio</em>) are an introduced species that negatively impact aquatic vegetation through changes in water quality, uprooting of plants, and …
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Diet Analysis of Burbot from Eastern Lake Michigan: 1999-2012
<p>The Lake Michigan fish community has undergone many changes due to introduction of non-native species, climate shifts, and management actions. Managers need to understand the time course of these alterations, including the time-frame of impact on the food web in the lake. I used a collection …
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Comparison of Creel Survey Data to Traditional Sampling Techniques in Pit-Lake Fisheries of Muhlenberg County, Kentucky
<p>Populations of largemouth bass, <em>Micropterus salmoides</em>, and bluegill, <em>Lepomis macrochirus</em>, were evaluated from five pit-lakes in Muhlenberg County, Kentucky, to determine if accurate proportional stock density (PSD) data can be obtained from a mandatory creel survey. It was …
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Life History and Distribution of Two Species of Cownose Ray, Rhinoptera bonasus and Rhinoptera brasiliensis, in Mississippi Coastal Waters
… were analyzed to describe the reproductive biology. Reproductive timing, mating, gestation length, and parturition were similar among species. Although more samples are needed to confirm, we provide evidence of a larger size-at-maturity and size-at-birth for <em>R. brasiliensis</em>. Age and …
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Bloom or Bust: Retrospective Analysis of the Giant Jellyfish, <i>Nemopilema nomurai</i> (Scyphozoa: Rhizostomeae), Ecology in the East Asian Marginal Seas
… lost revenue and equipment damage to commercial fisheries alone. This study statistically analyzed 21 environmental factors in connection with <em>N. nomurai</em> occurrence (using occurrence as a proxy for blooms). Eight factors resulted in a statistically significant or marginally significant …
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Transcriptome Analysis of Sea Lamprey Embryogenesis
<p>The sea lamprey (<em>Petromyzon marinus</em>) has survived throughout evolution for hundreds of millions of years. It is considered an invasive species to the Great Lakes that has caused dramatic changes in the ecosystem for fish communities resulting in the collapse of a fishing industry that …
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Molecular Population Genetics of the Atlantic Sand Fiddler Crab, Uca Pugilator, Along the Atlantic Coast
<p>Author's abstract: The Atlantic sand fiddler crab, Uca pugilator, is an extremely abundant fiddler crab found along the eastern and Gulf coast of the United States. Fiddler crabs have a life cycle with an obligatory planktonic larval phase of 30-90 days, which might be expected to lead to …
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