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Full-Text Articles in Aquaculture and Fisheries

A Fishy Problem: Effects Of Atlantic Salmon Farming In The Pacific Ocean, Madeleine A. Griffith May 2019

A Fishy Problem: Effects Of Atlantic Salmon Farming In The Pacific Ocean, Madeleine A. Griffith

Student Theses 2015-Present

In this report, I explore the historical, climatological, economic, and ethical issues created by the contemporary industrial salmon farming practices off Pacific coast of the United States and Canada. Chapter 1 utilizes a variety of sources from Stephen Hume’s A Stain upon the Sea to Miller’s Living in the Environment, to examine the integral part salmon plays in both freshwater and marine ecosystems, the ecosystem services salmon contribute in wild and farmed settings, and the trends in salmon consumption around the world. Chapter 2 examines the historically relevant role salmon held among indigenous societies and how that role ...


The Effects Of Salinity On Zootechnical Performance Of Spotted Seatrout (Cynoscion Nebulosus) In Recirculating Aquaculture Systems, Eric Gigli Apr 2019

The Effects Of Salinity On Zootechnical Performance Of Spotted Seatrout (Cynoscion Nebulosus) In Recirculating Aquaculture Systems, Eric Gigli

Master's Theses

The spotted seatrout (Cynoscion nebulosus) is a euryhaline finfish candidate for marine aquaculture in the northern Gulf of Mexico. Aquaculture of this species currently uses salinities of 25 psu or greater making production challenging in areas where high salinity water is not available. This study aimed to document the effects of salinity on zootechnical performance of spotted seatrout embryos, early larvae, and juveniles in recirculating aquaculture systems to assist with the development of protocols for low salinity culture.

Embryos obtained from a volitional spawn at 29 psu were incubated at three salinities (12.5, 18.75, or 25 psu) until ...


A Low-Water Crossing Impacts Movement Behavior Of Northern Hog Suckers In An Ozark Stream, Jeff Michael Williams Jan 2019

A Low-Water Crossing Impacts Movement Behavior Of Northern Hog Suckers In An Ozark Stream, Jeff Michael Williams

MSU Graduate Theses

Low-water crossings are common in Ozark streams and can restrict longitudinal movement in fishes. I evaluated the impact of the Cedar Grove low-water crossing on Northern Hog Sucker Hypentelium nigricans movement behavior in Missouri’s Current River. Radio-tagged fish upstream (henceforth ‘above’; N = 24) and downstream (henceforth ‘below’; N = 26) of the crossing were followed monthly for a year to assess 1) frequency of fish passage, 2) direction of passage, and 3) maximum displacement of mobile (displacement > 1 km) fish. I then looked at diel movement behavior of stationary (displacement < 1 km) fish near the crossing to assess 1) total displacement and linear home range, 2) direction of diel displacement, and 3) habitat use. Passage was limited to four below-tagged fish and was more likely to occur in the upstream direction and during high flow. The direction of maximum displacement in mobile fish was primarily away from the crossing, and below-tagged fish exhibited over seven times greater displacement than above-tagged fish. Diel displacement and linear home range were greater in above-tagged fish, likely due to degraded upstream habitat that increased the distance between day and night habitats. My results suggest the crossing is a semi-permeable barrier that also affects local-scale movement behavior of Northern Hog Suckers. Alternatives to the low-water crossings at Cedar Grove, such as modifying the side channel into a fish bypass, should be considered to promote natural longitudinal movement of fishes in the upper Current River.


Analysis Of Unconventional Oil And Gas Impacts On Downstream Fish Assemblages And Physiological Stress, Joshua Noah Ankeny Jan 2019

Analysis Of Unconventional Oil And Gas Impacts On Downstream Fish Assemblages And Physiological Stress, Joshua Noah Ankeny

Graduate Theses, Dissertations, and Problem Reports

Unconventional Oil and Gas (UOG) production has been steadily expanding throughout the mid-Atlantic since 2008. Increased sedimentation, degraded water chemistry and an overall decrease in habitat quality due to UOG is anticipated to negatively impact aquatic inhabitants, a common observation in other stressed landscapes (i.e., mining, agriculture, development). We assessed stream health through both community analysis and physiological parameters (i.e., growth and hematocrit). A before-after-control-impact study uncovered three fish metrics that were significantly different following UOG disturbances. The invertivore-piscivore metric decreased following UOG disturbance (p = 0.045) whereas two benthic metrics saw a surprising increase (p = 0.003 ...


Developmental And Functional Analysis Of Scutes In The Armored Catfish Corydoras Aeneus, Emily Volk Jan 2019

Developmental And Functional Analysis Of Scutes In The Armored Catfish Corydoras Aeneus, Emily Volk

Undergraduate Honors Theses

Fish scales are specialized biological structures of current interest in innovative materials design because of the combination of protective function, flexibility, and light weight they offer. This study presents a developmental and functional investigation of a particular fish scale structure, the scutes (bony external plates) of the armored Bronze Corydoras Catfish (Corydoras aeneus). Scutes in this model fish species were analyzed via three complementary approaches. First, scutes were documented throughout fish development via high-quality microscope images. These images were subsequently used to inform fabrication of synthetic models to characterize the relationship between scute overlap and overall bending stiffness of scute ...


Legacy Habitat Suitability Of Eastern Oysters (Crassostrea Virginica) In Louisiana: A Prelude To Mississippi River Delta Freshwater Diversions, Tasia Mv Denapolis Dec 2018

Legacy Habitat Suitability Of Eastern Oysters (Crassostrea Virginica) In Louisiana: A Prelude To Mississippi River Delta Freshwater Diversions, Tasia Mv Denapolis

University of New Orleans Theses and Dissertations

The Louisiana oyster industry is greatly impacted by freshwater and sediment diversions that are part of the effort to restore the state’s coastline. A habitat suitability index (HSI) proposes species-habitat relationships that can be instrumental in creating impact assessments and suitability predictions for management as new diversions are implemented. An oyster (Crassostrea virginica) HSI was developed using three variables crucial to oyster sustainability: average annual salinity, minimum monthly salinity, and average salinity during the spawning season. These Legacy HSI visualizations show annual fluctuations in the distribution of zones suitable for oyster cultivation prior to proposed diversions in Pontchartrain and ...


Iuu Fishing: A Gateway To Transnational Crimes In Jamaica, Judy-Ann Icinda Neil Nov 2018

Iuu Fishing: A Gateway To Transnational Crimes In Jamaica, Judy-Ann Icinda Neil

World Maritime University Dissertations

No abstract provided.


Compliance And Enforcement For The Exclusive Economic Zone Fisheries Management In The United Republic Of Tanzania, Christian Alphonce Nzowa Nov 2018

Compliance And Enforcement For The Exclusive Economic Zone Fisheries Management In The United Republic Of Tanzania, Christian Alphonce Nzowa

World Maritime University Dissertations

No abstract provided.


Community-Based Organisations As An Approach To Effective Sustainable Artisan Fishing, Mary Mindi Wabit Epse Ngawana Nov 2018

Community-Based Organisations As An Approach To Effective Sustainable Artisan Fishing, Mary Mindi Wabit Epse Ngawana

World Maritime University Dissertations

No abstract provided.


Integrated Use Of Drones And Qr Codes As Complementary Components For Monitoring, Control And Surveillance Systems For Artisanal Fishing Vessels In Peru, Eduardo Israel Zamora Chung Nov 2018

Integrated Use Of Drones And Qr Codes As Complementary Components For Monitoring, Control And Surveillance Systems For Artisanal Fishing Vessels In Peru, Eduardo Israel Zamora Chung

World Maritime University Dissertations

No abstract provided.


An Evaluation Of Sciaenid Growth In The Gulf Of Mexico, Shane Flinn Oct 2018

An Evaluation Of Sciaenid Growth In The Gulf Of Mexico, Shane Flinn

LSU Master's Theses

Growth models estimate life history parameters that are used in the management of fisheries stocks. The most commonly used growth model in fisheries is the von Bertalanffy growth model (VBGM), yet it has been shown to provide a poor fit for length-at-age data of some species and other models exist. I reviewed 196 peer-reviewed age and growth studies and 50 NOAA stock assessments to examine temporal trends in the use of growth models and model selection in fisheries. I found that the use of multi-model frameworks has increased since the year 2000 and information theoretic approaches are replacing goodness-of-fit and ...


The Effect Of Shelter Availability On Foraging In Atlantic Salmon (Salmo Salar), Christian A. Therrien Sep 2018

The Effect Of Shelter Availability On Foraging In Atlantic Salmon (Salmo Salar), Christian A. Therrien

Electronic Thesis and Dissertation Repository

Shelter is an environmental feature that provides protection from danger and its use is an important anti-predator behavior for juvenile Atlantic salmon (Salmo salar). However, how shelter availability influences the foraging of these fish in the wild is not well documented. I predicted that juvenile Atlantic salmon would alter their foraging behavior in a low shelter environment and that this effect would differ between individuals from two populations that are targeted for reintroduction into Lake Ontario. I measured the foraging activity of juvenile Atlantic salmon from the two populations while they were held in pens in a Lake Ontario tributary ...


Using Local Fishery Monitoring To Understand Small-Scale Coastal Fisheries In Tanzania, Matthew Robertson Aug 2018

Using Local Fishery Monitoring To Understand Small-Scale Coastal Fisheries In Tanzania, Matthew Robertson

LSU Master's Theses

Nearshore marine fisheries provide the main source of protein for nearly 9 million people in the coastal villages of Tanzania, yet for decades the fisheries have shown signs of overexploitation. These fisheries are small-scale and co-managed by local coastal communities in groups known as Beach Management Units (BMUs). BMUs monitor individual fishing trip data (e.g. gear, vessel, taxa); however, these data have only been analyzed in nationally aggregated statistics and to our knowledge, are not presently used in management decision making. The present thesis aimed to identify the forms of data and information that local fishery monitoring can record ...


Modeling And Mapping Addiction In The Zebrafish, Danio Rerio, Bradley Serpa Jul 2018

Modeling And Mapping Addiction In The Zebrafish, Danio Rerio, Bradley Serpa

Master of Science in Integrative Biology Theses

Driven by the communication of dopamine, the vertebrate reward system has been evolutionarily conserved to maintain survival and optimize fitness. The neural circuits governing this system integrate sensory stimuli to produce appropriate, self-preserving responses that underlie experience-based learning. In the most primitive vertebrates, dopamine release in neuronal circuits drives homeostatic behaviors, such as seeking nutrients, finding a mate, or avoiding danger. From agnathans to mammals, dopaminergic synthesis and signaling genes and molecules, along with neuronal pathways and reward system-based behaviors, remain highly conserved. Dopamine signaling proteins include two classes of metabotropic G-Protein Receptor Coupled Dopamine Receptors, D1-like (DRD1) and D2-like ...


Conservation Of Freshwater Live-Bearing Fishes: Development Of Germplasm Repositories For Goodeids, Yue Liu Jul 2018

Conservation Of Freshwater Live-Bearing Fishes: Development Of Germplasm Repositories For Goodeids, Yue Liu

LSU Doctoral Dissertations

Fishes of the family Goodeidae are considered to be among the most imperiled taxa in the world. The goal of this project was to provide a foundation for development of sperm repositories for goodeids and to use them as a model to assist conservation programs for imperiled freshwater live-bearing fishes. Development of such repositories is challenging because of unusual reproductive characteristics of live-bearing fishes, such as sperm bundles, internal fertilization, and the bearing of live young. Standardized methods were established to evaluate quality-related attributes of sperm bundles. The different features between activation of free and bundled sperm were investigated and ...


Investigating Present-Day Health Issues Of The American Lobster (Homarus Americanus), Deborah A. Bouchard May 2018

Investigating Present-Day Health Issues Of The American Lobster (Homarus Americanus), Deborah A. Bouchard

Electronic Theses and Dissertations

The American lobster, Homarus americanus, H. Milne Edwards, 1837, supports the most economically valuable fishery along the North Atlantic coast of North America. A collapse in lobster populations in Southern New England (SNE) has coincided with increasing ocean temperatures and emerging diseases. This research investigated the etiologies of limp lobster disease (LLD) and epizootic shell disease (ESD), two diseases that continue to cause significant mortality in natural lobster populations. Mortality from LLD is associated with the bacteria Photobacterium indicum and is more intense in impounded lobsters. To more clearly define the community ecology of this suspected opportunistic pathogen, the microbial ...


Movements And Capture Efficiency Of The Blue Catfish Ictalurus Furcatus,In Lake Dardanelle, Zachary S. Moran May 2018

Movements And Capture Efficiency Of The Blue Catfish Ictalurus Furcatus,In Lake Dardanelle, Zachary S. Moran

Theses and Dissertations from 2018

Standardizing low-frequency electrofishing procedures for sampling Blue Catfish Ictalurus furcatus has become a recent focus of fisheries biologists. Information on habitat use, value of chase boats, and duration and timing of samples could increase sampling efficiency. To asses these variables in Lake Dardanelle, Arkansas, I divided this reservoir into lacustrine, transition, and riverine zones. I used a systematic random sample design, and electrofisher, to collect 8,067 Blue Catfish from 458 samples between May and September 2016. I found: (1) The most efficient season to sample was the summer season when water temperatures were >25°C; (2) CPUE was highest ...


Spatio-Temporal Dynamics Of Atlantic Cod Bycatch In The Maine Lobster Fishery And Its Impacts On Stock Assessment, Robert E. Boenish May 2018

Spatio-Temporal Dynamics Of Atlantic Cod Bycatch In The Maine Lobster Fishery And Its Impacts On Stock Assessment, Robert E. Boenish

Electronic Theses and Dissertations

Of the most iconic fish species in the world, the Atlantic cod (Gadus morhua, hereafter, cod) has been a mainstay in the North Atlantic for centuries. While many global fish stocks have received increased pressure with the advent of new, more efficient fishing technology in the mid-20th century, exceptional pressure has been placed on this prized gadoid. Bycatch, or the unintended catch of organisms, is one of the biggest global fisheries issues. Directly resulting from the failed recovery of cod in the GoM, attention has been placed as to possible sources of unaccounted catch. Among the most prominent is ...


Incorporating Environmental Variability Into Assessment And Management Of American Lobster (Homarus Americanus), Kisei Tanaka May 2018

Incorporating Environmental Variability Into Assessment And Management Of American Lobster (Homarus Americanus), Kisei Tanaka

Electronic Theses and Dissertations

The American lobster (Homarus americanus) support one of the most valuable fisheries in the United States. A growing body of literature recognizes the importance of environmental variables in regulating this species’ biogeography and population dynamics. However, the current lobster stock assessment and management do not explicitly consider the impact of environmental variables such as water temperature and assumes spatiotemporal variabilities in the lobster environment as random background noises. Furthermore, while climate-induced changes in marine ecosystems continue to impact the productivity of lobster fisheries, studies that model lobster response to altered environmental conditions associated with climate change are lacking. As such ...


Developmental And Cross-Generational Distribution And Toxicity Of Polystyrene Nanoparticles In Zebrafish (Danio Rerio), Jordan Pitt May 2018

Developmental And Cross-Generational Distribution And Toxicity Of Polystyrene Nanoparticles In Zebrafish (Danio Rerio), Jordan Pitt

Honors Theses

Plastics are ubiquitous in aquatic environments, accounting for 50-80% of marine debris (Barnes et al., 2009). The hazard of macroplastics (particles with a diameter > 5 mm) is well established, with records of countless different species ingesting or becoming entangled in plastic debris (Laist, 1997). Recently, the degradation of macroplastics debris in the ocean and the beach litter into microplastics and nanoplastics has become a significant concern and an increasingly important area of research (Andrady, 2011). Despite this increase in concern relatively little is known about the presence of micro and nanoplastics in freshwater systems or about their potential toxicity to ...


The Landscape Of Fishing : A Study Of Iceland’S Fishing Industry, Ryan F. Mackerer May 2018

The Landscape Of Fishing : A Study Of Iceland’S Fishing Industry, Ryan F. Mackerer

Honors Theses

The Landscape of Fishing is a comprehensive look into the history and modern day fishing industry of Iceland. In this study, each active fi shing harbor has been documented, mapped and analyzed to understand how the deeply rooted cultural practice of fishing has infl uenced development across the country as well as its role in shaping the landscape of the country into what it is today. Fishing has been synonymous with the country of Iceland since its settlement. There has arguably been no greater driving force of development that has influenced the country in the same way that the fishing ...


Extending Spectrophotometric Pht Measurements In Coastal And Estuarine Environments, Nora Katherine Douglas Apr 2018

Extending Spectrophotometric Pht Measurements In Coastal And Estuarine Environments, Nora Katherine Douglas

Graduate Theses and Dissertations

Nearshore and estuarine environments play a vital role in the cycling of carbon, but the effects of ocean acidification in estuarine waters have not been studied as extensively as in the open ocean. One reason for this is the limitation of pH measurement capabilities in low-salinity waters. Typically, pH in these environments has been measured using potentiometric methods that are subject to uncertainties on the order of 0.01. Spectrophotometric methods for measuring pHT offer precision and accuracy superior to those of potentiometric methods. However, previous characterizations for purified sulfonephthalein indicators, used for marine spectrophotometric measurements, are not applicable to ...


Big Fish, Big Data: Discussing The State Of Salmon And Improving King Salmon Regulation Through A Population Model, Creed Coram Apr 2018

Big Fish, Big Data: Discussing The State Of Salmon And Improving King Salmon Regulation Through A Population Model, Creed Coram

Student research

No abstract provided.


Crayfish Harvesting Practices In The Southern Atchafalaya River Basin: Quantitative And Qualitative Assessment Of Harvester Techniques And Hydrologic Connectivity Influence On Harvesting Strategies, Ivan A. Vargas-Lopez Jan 2018

Crayfish Harvesting Practices In The Southern Atchafalaya River Basin: Quantitative And Qualitative Assessment Of Harvester Techniques And Hydrologic Connectivity Influence On Harvesting Strategies, Ivan A. Vargas-Lopez

LSU Master's Theses

Fisheries produce important impacts around the world through the exploitation of a wide range of species. In Louisiana, crayfish is the most emblematic crustacean and supports a multi-million industry based on pond culture and harvest from natural habitats. Although the economic value (USD) of wild-harvested crayfish has decreased from 10% to 3% of total crayfish value from 2013 to 2015, wild harvested crayfish are highly desired by many consumers and have a strong socio-cultural importance in Louisiana and other Gulf of Mexico coastal regions. This project evaluated harvesting practices by: 1) field observation and mapping of harvest sites in southwestern ...


Characterizing Habitat Preference In Three Nearshore Reef-Associated Fishes Through Collaborative Research, Public Data, And Open Source Software, Ian D. Kelmartin Jan 2018

Characterizing Habitat Preference In Three Nearshore Reef-Associated Fishes Through Collaborative Research, Public Data, And Open Source Software, Ian D. Kelmartin

Theses and projects

Black rockfish (Sebastes melanops), canary rockfish (S. pinniger), and lingcod (Ophidion elongatus) are important species in Northern California’s nearshore recreational and commercial fisheries. These species are associated with nearshore rocky reefs and are among a suite of species intended to benefit from the establishment of the marine protected area (MPA) network along the Northern California Coast in 2012.

Many aspects of the North Coast’s nearshore ecosystem remain poorly studied, including the spatial distribution and habitat associations of nearshore fish species. This study used data collected from Cape Mendocino State Marine Reserve (SMR), Ten Mile SMR, and paired, nearby ...


Nutritional Value Of Modified Novel Oilseed Meals In Teleost Diets, Tom Kasiga Jan 2018

Nutritional Value Of Modified Novel Oilseed Meals In Teleost Diets, Tom Kasiga

Electronic Theses and Dissertations

Carinata Brassica carinata and camelina Camelina sativa are being genetically modified to improve their composition for biofuel production and other agricultural applications. After oil extraction, the residual de-oiled meals (40%) in protein. However, their inclusion in animal feeds is limited to 10% because of high levels of antinutritional factors (ANFs), mainly glucosinolates (GLS), sinapine, and crude fiber that limit diet intake, nutrient utilization, and lower thyroxine production, resulting in reduced growth. The nutritional value of carinata and camelina seed meals to fish were assessed by subjecting cold pressed (CP) carinata and camelina meals to extrusion (EX), solvent extraction (SE) and ...


Intertidal Habitat Utilization By Endangered Green Sturgeon (Acipenser Medirostris), Willapa Bay, Washington, Luke Stilwater Jan 2018

Intertidal Habitat Utilization By Endangered Green Sturgeon (Acipenser Medirostris), Willapa Bay, Washington, Luke Stilwater

All Master's Theses

This study looks at a portion of the designated critical habitat for the threatened southern distinct population segment of green sturgeon (Acipenser medirostris) in Willapa Bay, Washington. Willapa Bay is an intermediate size (258.7mi2) estuary on the southwest coast of Washington State, approximately 30 miles north from the mouth of the Columbia River. Recent studies completed by the National Marine Fisheries Service have shown that significant aggregations of green sturgeon in Willapa Bay occur during the late summer months, and foraging activity for burrowing ghost shrimp (Neotrypaea californiensis) is evidenced by small round feeding pits (30-60 cm diameter) in ...


Impacts On Salmonid Rearing Performance With Use Of Dietary Bioprocessed Plant-Based Protein And Water Velocity, Jill Voorhees Jan 2018

Impacts On Salmonid Rearing Performance With Use Of Dietary Bioprocessed Plant-Based Protein And Water Velocity, Jill Voorhees

Electronic Theses and Dissertations

The inclusion of bioprocessed soybean (Glycine max) meal was evaluated in five experiments using either Rainbow Trout (Oncorhynchus mykiss) or Brown Trout (Salmo trutta). In the first experiment, adult Erwin x Arlee strain Rainbow Trout were fed diets formulated so that bioprocessed soybean meal (BSM) replaced 0, 60, or 80% of the dietary fishmeal. There were no significant differences in gain, percent gain, feed conversion ratio, specific growth rate, intestinal morphology, relative fin lengths, or organosomatic indices. In the second experiment, juvenile Plymouth strain Brown Trout were fed diets formulated so that BSM replaced 0, 60, 80, or 100% of ...


Walleye Fishery Ecology In Lake Oahe Of The Dakotas, Eli Felts Jan 2018

Walleye Fishery Ecology In Lake Oahe Of The Dakotas, Eli Felts

Electronic Theses and Dissertations

Walleye Sander vitreus is among the most popular sport fishes in North America and is the most sought-after fish in both South Dakota and North Dakota. Lake Oahe, a large main stem Missouri River reservoir, spans state boundaries and provides one of the most popular and productive Walleye fisheries in both Dakotas. The Walleye population of Lake Oahe has experienced wide fluctuations in abundance and size structure over the last 25 years which has caused high variability in angler use and satisfaction. Much of this variation is thought to be driven by Rainbow Smelt Osmserus mordax, which are the dominant ...


Rangewide Tidewater Goby Occupancy Survey Using Environmental Dna, Michael Sutter Jan 2018

Rangewide Tidewater Goby Occupancy Survey Using Environmental Dna, Michael Sutter

Theses and projects

Rangewide monitoring of fish species is critical for determining status and trends in abundance and distribution; however, implementations of large-scale distribution surveys have generally been constrained by time and cost. This study uses environmental DNA (eDNA) to monitor the presence or absence of two endangered tidewater goby species, the northern tidewater goby (Eucyclogobius newberryi) and the southern tidewater goby (Eucyclogobius kristinae), across their combined geographic range that encompasses the entire California coast (1,350 km).A multi-scale occupancy model designed specifically for eDNA methods was used to account for imperfect detection and to estimate true site occupancy. A total of ...