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Harvest Strategy Policy And Operational Guidelines For The Aquatic Resources Of Western Australia, Department Of Agriculture And Food, Western Australia

Fisheries Management Papers

No abstract provided.

Blow-Up Of Positive Solutions To Wave Equations In High Space Dimensions, Mohammad A. Rammaha, Hiroyuki Takamura, Hiroshi Uesaka, Kyouhei Wakasa

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

This paper is concerned with the Cauchy problem for the semilinear wave equation:

utt - u = F(u) in Rn X [0;1);

where the space dimension n >2, F(u) = jujp or F(u) = up-1u with p>1. Here, the Cauchy data are non-zero and non-compactly supported. Our results on the blow-up of positive radial solutions (not necessarily radial in low dimensions n=2,3) generalize and extend the results of Takamura [19] for zero initial position and Takamura, Uesaka and Wakasa [21] for zero intitial velocity. The main technical difficulty in the paper lies in obtaining the lower bounds for for …

Dietary Overlap Of Native White Bass And Introduced Yellow Bass In Barren River, Micaela L. Montgomery

Mahurin Honors College Capstone Experience/Thesis Projects

In the Barren River Lake of south central Kentucky, native white bass, Morone chrysops, has experienced a decline in population after the introduction of yellow bass, Morone mississippiensis. These species are competing for resources due to an overlapping diet, likely contributing to the decline of the white bass. To explore this hypothesis, I examined the stomach contents and otoliths of white and yellow bass caught during their spawning time in spring 2012. There were 40 yellow bass and 128 white bass collected in Barren River upstream of Barren River Lake. Analysis of stomach contents revealed that both white and …

Comparing Pseudo-Environmental And Horizontal Plus Pseudo-Environmental Transmission Of A Probiotic Janithinobacterium Lividum Between Green Frog Tadpoles, Stephen Simonetti

Senior Honors Projects, 2010-2019

The gram-negative bacteria, Janthinobacterium lividum (J.liv) is able to kill the pathogenic fungus known as Batrachochytrium dendrobatidis (Bd), which is known to be causing massive amphibian decline worldwide. The purpose of this research was to identify the ability of the probiotic bacteria, Janthinobacterium lividum (J.liv), to be horizontally transmitted from individual to individual and/or pseudo-environmentally transmitted from individual to environment and back to individual between Lithobates clamitans (green frog) tadpoles. Based on previous findings I hypothesized that pseudo-environmental and horizontal transmission will occur in tadpoles. This would be important for helping stop the decline of amphibians because it would provide …

Using Capture-Mark-Recapture Techniques To Estimate Detection Probabilities & Fidelity Of Expression For The Critically Endangered James Spinymussel (Pleurobema Collina)., Alaina C. Esposito

Masters Theses, 2010-2019

The critically endangered James Spinymussel (Pleurobema collina) is a species of freshwater mussel endemic to Virginia’s James and Dan River basins. In the last 20 years, P. collina has experienced a substantial decline in numbers and currently occupies approximately 10% of its original habitat; however, little information is known about this species to assist in conservation. A 230-meter reach of transitional habitat in Swift Run was selected for repeat observations to estimate detection probabilities using a Capture-Mark-Recapture framework. In June 2014, visual scouting began to locate and tag P. collina (including other mussels in the community) with PIT …

Section Abstracts: Agriculture, Forestry And Aquaculture

Virginia Journal of Science

Abstracts of the Agriculture, Forestry and Aquaculture Section for the 93rd Annual Virginia Academy of Science Meeting, May 2015, at James Madison University

Combating Infectious Diseases In Aquaculture With An Original Probiotic Product, Meagan Hamblin, Saebom Sohn, Christine Ahn Dao, Marta Gomez-Chiarri, David R. Nelson, David Worthen, David Rowley

Senior Honors Projects

Oyster production in Rhode Island accounts for over $2.5 million in annual revenue, making it the top aquaculture product in the state. However, larval tank infections significantly constrain production and create substantial economic losses for commercial hatcheries. In most cases antibiotics may not be used to prevent or treat larval tank infections. A probiotic, or beneficial microbe which competes with pathogens, is a safer and “green” approach to preventing infections. Vibriosis, a common cause of oyster larval mortality, is the result of Vibrio species infections. Previous studies have shown that a native Rhode Island microbe, Bacillus pumilus RI06-95, protects oyster …

Fisheries Management Paper No 274 - Finfish Resources Of The Peel-Harvey Estuary - Harvest Strategy 2015-2020 (Version 1.0), Department Of Fisheries, Western Australia

Fisheries Management Papers

WEST COAST ESTUARINE MANAGED FISHERY (AREA 2)

Harvest strategies for aquatic resources managed by the Western Australian Department of Fisheries (the Department) are formal documents prepared to support the decision-making processes required to ensure the management of these resources are consistent with the principles of Ecologically Sustainable Development (ESD). The objectives of ESD are reflected in the objects of the Fish Resources Management Act 1994 (FRMA), Section 3, and the draft Aquatic Resources Management Bill 2013 (ARMB), Clause 9, which will replace the FRMA once enacted.

The publication of these strategies is intended to make the decision-making considerations and processes …

Finding The Needle And The Haystack: New Insights Into Locating Bog Turtles (Glyptemys Muhlenbergii) And Their Habitat In The Southeastern United States, Theresa Sonja Margareta Stratmann

All Theses

Because rare and cryptic species can be difficult to locate, distribution maps for these species are often inaccurate or incomplete. Bog Turtles (Glyptemys muhlenbergii) are emblematic of this challenge. In fact, conducting surveys of known, historical, and potential Bog Turtle habitat is a specific need stated in the Bog Turtle Northern Population Recovery Plan and in most Comprehensive Wildlife Conservation Strategies of states within the southern range. Therefore we examined ways to better locate Bog Turtle habitat and Bog Turtles within that habitat. First we determined a detection probability for a standardized trapping method so we could effectively survey for …

Examination Of Polymorphism In The Serine Proteinase Inhibitor Gene In The Eastern Oyster, Crassostrea Virginica., Aine Lehane

Senior Honors Projects

Oysters are a keystone species; they are filter-feeders and reef-builders. Additionally, oysters are extremely important within the shellfish aquaculture industry; they are the second most widely produced species in world aquaculture production. Eastern oysters, Crassostrea virginica, are produced in aquaculture and are unfortunately susceptible to Dermo disease. Dermo is caused by a protozoan parasite, Perkinsus marinus, and infection is often fatal in oysters due to widespread tissue damage and blockage of blood vessels. Research in oyster disease is particularly needed because disease is one of the largest impediments faced by the aquaculture industry as entire oyster populations can …

Ion Regulatory Capabilities Of The European Green Crab, Carcinus Maenas, Exposed To Low Salinity Environments: An Investigation Into The Physiological Differences Between Two Color Morphs Across Sex, Anthony Himes

All Theses And Dissertations

The European green crab, Carcinus maenas, is a highly invasive species found throughout the world with severe economic and ecological impacts on the regions it invades. This species occurs in two color morphs: green after molting and red after prolonged intermolt. Physiological variations between these two morphs are well documented across various environmental conditions, but little work has focused on female C. maenas. To assess if the variation between color morphs observed in males persists in females, red and green morphs of each sex were exposed to a constant low salinity environment. Constant low salinity exposure was chosen as it …

Effects Of Pre-Release Physical Stressors On Post-Release Success Of Hatchery-Reared Spotted Seatrout, Taylor Westbrook Guest

Master's Theses

Alteration of habitat associated with coastal development and increased demand for food and recreation can result in the depletion of fisheries resources such as the Spotted Seatrout (Cynoscion nebulosus), the Gulf of Mexico’s most popular recreational fish. Stock enhancement, or the release of cultured fish to supplement wild populations, is one potential tool for managing important fisheries resources. Although much effort has gone into marine stock enhancement, the effectiveness of stocking is not well established, and techniques for ensuring success have not been developed. Although the basic biology of the Spotted Seatrout is well known, comparatively little is known about …

Genetic And Morphological Variation In Ecuadorian Astroblepid Catfishes, Katherine M. Lawry

School of Natural Resources: Dissertations, Theses, and Student Research

The Andean ichthyofauna remains a poorly understood component of Neotropical biodiversity, and stands in stark contrast to the lowland ichthyofauna in terms of number of species and range of distribution. The Climate Variability Hypothesis (CVH) predicts rapid turnover of species along elevational gradients in tropical climates, but it remains unclear whether stream fishes follow this pattern. Astroblepid catfishes represent a distinctive assemblage of species that inhabit high elevation streams throughout the Andes from Panama to Bolivia, and constitute the only native fish family present in the Ecuadorian highland region. In this research, population samples of Astroblepids collected throughout Ecuador’s Napo …

Ecology And Management Of Superabundant Fish Populations, Nathaniel T. Stewart

School of Natural Resources: Dissertations, Theses, and Student Research

Fish population biomasses can reach extreme levels; we term these populations superabundant fish populations. Superabundant fish populations may negatively affect aquatic communities and anglers, necessitating the effective management of the superabundant fish populations. However, there are gaps in our understanding of these populations. The gaps in our understanding hamper our ability to predict effects on valuable sportfisheries and to effectively manage superabundant fish populations. The overall goal of my thesis research is to provide further insight into the ecology of superabundant fish populations and to provide information that will aid in their effective management. First, we described a new method …

Bioenergetics And Habitat Suitability Models For The Chinese Mystery Snail (Bellamya Chinensis), Danielle M. Haak

School of Natural Resources: Dissertations, Theses, and Student Research

Relatively little is known about the invasive Chinese mystery snail (Bellamya chinensis). This research aims to elucidate some of the mystery surrounding this species. First, we place the species in context with other invasive freshwater snails of the USA and Canada, identifying current information gaps, categorizing shared characteristics among families and species, and comparing functional roles and ecological effects of freshwater snails. We conclude that more focus needs to be directed to regulating the aquarium, pet, and food trades if we are serious about preventing future invasions. Next, we develop a bioenergetics model for the species by quantifying …

A Comparative Study Of The Effects Of Non-Starch Polysaccharide Gums On Physical Properties Of Single-Screw Extruded Aquafeed, Michael Brown, Parisa Fallahi, Kasiviswanathan Muthukumarappan, Poonam Singha, Scott Sindelar

Natural Resource Management Faculty Publications

A factorial experimental design (5×3×2) was used to investigate the effects of non-starch polysaccharide binding agents on physical properties of single-screw extrusion. Extrusion cooking trials were performed with an ingredient blend for yellow perch, fortified with five non-starch polysaccharide binding agents including three plant-origin gums (guar, wheat gluten, carboxymethyl cellulose (CMC)) and two microbial-origin exopolysaccharide gums (xanthan and pullulan), with three levels of gum inclusion (3, 6, and 10%), and two levels of screw speed (100 and 150 rpm). Effects of the independent variables on extrudate characteristics were extensively analyzed and included density, expansion ratio, water absorption and solubility indices, …

Variability In Movement Patterns And Habitat Use Of Two Species Of Pelecaniformes, Caroline Poli

All Theses

Information regarding movement patterns of seabirds is useful for understanding prey abundance and distribution, predicting overlap between bird activity and anthropogenic stressors, and assessing the effectiveness of reserves at protecting nesting or foraging habitat(Cairns 1992, Weimerskirch 2007, Weimerskirch et al. 2010). I examined movement patterns of 40 brown pelicans (Pelecanus occidentalis) satellite tagged in December 2010 in South Carolina, USA, and tracked until July 2013. Birds exhibited individual variability in movement patterns and 25% of individuals remained near the breeding colony during nonbreeding. Birds captured in South Carolina that did migrate wintered as far south as Guatemala, prospected and used …

An In-Depth Evaluation Of Otolith Zonation And An Ageing Comparison Of Otoliths, Scales, And Pectoral Fin Rays Of Redband Trout (Oncorhynchus Mykiss Gairdneri) And Bluegill (Lepomis Macrochirus), Dennis A. Daw

Boise State University Theses and Dissertations

Redband Trout (Oncorhynchus mykiss gairdneri), a native subspecies of Rainbow Trout residing east of the Cascade Mountains, USA, are a popular sport fish in much of its range. Bluegills (Lepomis macrochirus) are one the most important recreational fishes in North America, and are also sought by anglers in many Idaho waters. There is extensive confusion surrounding the timing and interpretation of otolith zones, specifically, which zone represents fast growth and which represents slow growth. Further, otoliths are a lethal sampling method and regardless of population status, many fisheries biologists prefer to use no lethal sampling methods. To determine if the …

Relative Abundances Of The Recently Introduced Barnacles, Megabalanus Coccopoma And An Unidentified Species Of Megabalanus, In The Southeastern U.S., Jennifer L. Tyson

Honors College Theses

ABSTRACT

Megabalanus coccopoma is a prominent invasive species off the coast of Georgia. Recently, among collected samples thought to be M. coccopoma, several individuals of an unidentified species of barnacle were found. The species has been identified as a Megabalanus species, but is still unidentified to the species level. Species identification is difficult due to morphological variation, inconsistent taxonomic keys, and unknown origin. In this study I developed a method to accurately distinguish M. coccopoma from the unidentified Megabalanus sp. using sequence differences in the mitochondrial Cytochrome Oxidase I (COI) gene. This study will provide an accurate estimate of …

Metabolic Theory Explains Latitudinal Variation In Common Carp Populations And Predicts Responses To Climate Change, Michael J. Weber, Michael L. Brown, David H. Wahl, Daniel E. Shoup

Natural Resource Management Faculty Publications

Climate change is expected to alter temperature regimes experienced by fishes, which may also alter life history traits. However, predicting population-level responses to climate change has been difficult. Metabolic theory of ecology has been developed to explain how metabolism controls a variety of ecological processes, including life history attributes. Thus, this theory may be a useful tool for predicting fish population responses to climate change. To understand how climate change may alter freshwater fish life history, we measured population characteristics (e.g., recruitment, growth, body size, and mortality) of 21 North American common carp Cyprinus carpio populations spanning a latitudinal gradient …