Aquaculture and Fisheries Commons^™

Status Of Demersal Finfish Stocks On The West Coast Of Australia, David V. Fairclough, Brett W. Molony, Brett M. Crisafulli, Ian S. Keay, Sybrand Alexander Hesp, Ross J. Marriott

Fisheries Research Reports

Assessments of the key indicator species for the West Coast Demersal Scalefish Resource (WCDSR; West Australian dhufish Glaucosoma hebraicum, Snapper Pagrus auratus and Baldchin groper Choerodon rubescens) in 2007 and 2009 demonstrated that the stocks were experiencing overfishing. Thus, between late 2007 and early 2010, substantial changes were made to the management of the commercial and recreational fisheries that exploit the WCDSR. These were designed to reduce catches of the entire suite of demersal scalefish species (and of each indicator species) by both the commercial and recreational sectors in the West Coast Bioregion (WCB) by at least 50 % of …

Response Of Large River Fishes To A Prolonged High Water Event In The Missouri River, Nebraska, Nicholas Paul Hogberg

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

Regulation and modification of large rivers to accommodate human uses have been a root cause of freshwater biodiversity declines. The Missouri River is among the most drastically-altered large river systems in North America, with a series of mainstem impoundments in the upper watershed altering flow characteristics downstream, and channelization throughout the lower river homogenizing instream habitat and reducing off-channel habitat. Precipitation events during the winter and spring 2010-2011 caused flooding of the greatest magnitude and duration since reservoir completion. The large magnitude and long duration of this flood made it unlike any flood in recent history and provided a unique …

Accuracy Or Precision: Implications Of Sample Design And Methodology On Abundance Estimation, Lucas K. Kowalewski

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

Estimation of population size by spatially replicated counts (point-count method) has been used for many large-scale animal-monitoring programs, yet its application in aquatic environments has been limited. Multiple site-specific estimates of abundance can be averaged and combined with covariate data to predict total abundance across an area of interest. Covariate data also provide an understanding of the relationship between abundance and habitat use, which is a fundamental interest of many animal-population investigations. Design of sampling scenarios for point-count population-estimate surveys can influence the accuracy and precision of the population estimate. The first objective of this study was to examine how …

Influence Of Non-Native Trout On Native Non-Game Fish In Nebraska Headwater Streams, Kelly C. Turek

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

Introduced, non-native trout may have detrimental competitive or predatory interactions with native fishes. However, few studies have experimentally examined interactions between introduced trout and native non-game species. Therefore, the objectives of this study were to determine 1) if non-native rainbow trout Oncorhynchus mykiss influence survival, behavior, movement, or distribution of native longnose dace Rhinichthys cataractae under laboratory conditions, 2) if non-native rainbow trout influence survival of native longnose dace under in-situ conditions using in-stream enclosures, and 3) if native fish populations or communities differ in the presence and absence of non-native trout under natural conditions.

Rainbow trout preyed on longnose …

Developing An In-Season Predictor Of Commercial Landings For Quota Monitoring In The U.S. Virgin Islands, Mary Janine Vara

USF Tampa Graduate Theses and Dissertations

The lack of timely reporting of commercial fisheries landings interferes with effective management of fisheries in United States Virgin Islands (USVI). Federal law requires that landings be limited to prevent annual catch limits (ACLs) from being exceeded. Previous attempts to predict total landings have used historic data from prior fishing seasons to predict future landings rather than leveraging available in-season data to provide a more real-time prediction of landings. This study presents an in-season model that predicts total landings using partial reports from the current fishing year. This estimate of total landings, including error bounds around that estimate, can then …

Diet Analysis Of Burbot From Eastern Lake Michigan: 1999-2012, Casey J. Hares

All NMU Master's Theses

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 (1999-2012) of diet samples from burbot from eastern Lake Michigan to evaluate temporal alterations in burbot diet with particular attention to non-native vs. native forage. Catch per unit effort (burbot/net · day) decreased from a high of 5.82 burbot/net · day (± 2.19) in 2001 to a low of 0.750 burbot/net · day (± …

Production Of A Soybean Meal With High-Protein And Low Anti-Nutritional Factors For Fish Feed, Maria De Las Mercedes Castro

Graduate Theses and Dissertations

Aquaculture is one of the fastest growing areas of the food production system. According to the FAO, its rise is expected to continue through the year 2030 in order to maintain per-capita consumption levels required for the increasing population. Fishmeal--obtained from wild-harvested fish--has been the source of protein for fish feed. However, data indicates that these fish harvests are in decline, which could restrain that growth. The possibility of a shortage of fishmeal prompted the industry to look into possible alternatives. Soybean meal appears as a promising substitute since it is an affordable high quality source of protein. However, the …

Estrogenic Effects On A Protandrous Hermaphroditic Species: Amphiprion Percula, Randall Burns, Katie Dose

Undergraduate Research Symposium

Estrogen concentrations are increased in aquatic environments due to the addition of pharmaceutical drugs (i.e. birth control) through runoff water. This manipulates maturation of sexes within many species that inhabit aquatic enviornments, including fresh and marine habitats. Amphiprion percula exhibit a hierarchal system behavioral pattern, which determines the social status of individuals within a group. Multiple clown anemonefish, A. percula were studied via a controlled environment and hierarchal succession was observed under estrogenic additions. From this study, data on sex change of a hermaphroditic protandrous species was observed under the influence of three concentrations of natural estrogen. Based on sex …

Port Of Gloucester, Ma: Groundfish Port Recovery And Revitalization Plan By The City Of Gloucester, Urban Harbors Institute, University Of Massachusetts Boston, City Of Gloucester, Massachusetts

Urban Harbors Institute Publications

This plan represents another step forward by the City of Gloucester to confront the challenge of declining groundfish stocks and subsequent management measures which have had a profound effect on the fishing industry, the community, and its economy. The plan’s strategies include both short-term recommendations to address the immediate direct impacts on harvesters, fresh fish processors, and associated support businesses, as well as longer-term proposals to bolster and support the industry as it recovers, and proposals to create new economic opportunities built upon Gloucester’s maritime assets, skills, and intellectual capital, and old and new partnerships. The Plan lays out the …

Tracking Movements Of Ambystoma Tigrinum Using Radio Telemetry, Heather L. Waye, Kirsten T. Sharpe

Undergraduate Research Symposium 2014

The eastern tiger salamander (Ambystoma tigrinum) is a widely distributed amphibian ranging from Northern Minnesota, down to Florida, and over to the east coast of the United States (Oldfield and Moriarty, 1994). As populations within the species are diverse and seldom studies have been done in the area of radio telemetry in tiger salamanders, there is a need for information in this field. This project was the first of its kind to be implemented in Minnesota.

In an effort to more fully understand the ecology of this species, this research attempts to provide vital information that will allow a better …

Examples Of Non-Noetherian Domains Inside Power Series Rings, William Heinzer, Christel Rotthaus, Sylvia Wiegand

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

Given a power series ring R∗ over a Noetherian integral domain R and an intermediate field L between R and the total quotient ring of R∗, the integral domain A = L ∩ R∗ often (but not always) inherits nice properties from R∗ such as the Noetherian property. For certain fields L it is possible to approximate A using a localization B of a particular nested union of polynomial rings over R associated to A; if B is Noetherian, then B = A. If B is not Noetherian, we can sometimes identify the prime ideals of B that are not …

Effects Of Replacing Fishmeal With Squash Seed Meal (Cucurbita Maxima) On Performance Of Juvenile Nile Tilapia (Oreochromis Niloticus), Janice A. Ragaza, Jonni Fay C. Teves, Marie Noelle Fernandez

Biology Faculty Publications

The effects of replacing fishmeal with squash (Cucurbita maxima) seed meal (SSM) on Oreochromis niloticus juveniles were investigated on a 30-day feeding trial. Triplicate groups of ten (10) O. niloticus juveniles (2.54±0.949 g) stocked in polyethylene tanks received iso-nitrogenous diets with SSM inclusion levels of 0%, 5%, 10%, 15% and 20%. Fish fed 5% SSM inclusion level showed the highest average weight gain (202.25±36.26%) and specific growth rate (3.76±0.42%) among the fish fed SSM-containing diets. However, there were no significant differences between the average weight gain and specific growth rate of fish in all diets. Fish fed S5, S15 and …

Section Abstracts: Agriculture, Forestry, And Aquaculture

Virginia Journal of Science

Abstracts of the Agriculture, Forestry, and Aquaculture Section for the 92nd Annual Virginia Academy of Science Meeting, May 2014, at Virginia Commonwealth University in Richmond, Virginia

Salmonid Habitat Restoration On The Chocolay River, Michigan, Ross J. Crawford

Masters Theses

This project seeks to improve salmonid habitat quality by improving riparian vegetation on the adjacent banks (from toe to terrace) on the Chocolay River in Michigan's Upper Peninsula. Quantities of large woody debris (LWD) were also analyzed to determine the heterogeneityof stream habitats, or channel roughness. Percentages of rock, gravel, sand, and silt were analyzed to determine spawning habitat quality. As the proportions of fines (

Analyzing The Dynamics Of The Artisan Fishing Industry And Lapsset Port In Lamu, Kenya, Valerie Rodden

Independent Study Project (ISP) Collection

The LAPSSET project has the potential to severely impact the artisan fishing industry in Lamu. Through the provision of a perception focused survey and a few one on one interviews with artisan fishermen and key stakeholders in the industry, this study creates a more comprehensive understanding of the relationship between the fishing industry and the LAPSSET project. The fishermen of Lamu are most concerned about the lack of communication concerning the port’s activities and the blocking of fishing areas during port construction and operation. In general, there is a great sense of fear surrounding the port and the future of …

Microglia Respond To Both Permanent And Temporary Deaferentation In The Adult Zebrafish Olfactory Bulb, Amanda K. Mckenna

Masters Theses

The major goal of this study was to investigate a microglial response following deafferentation in the adult zebrafish, Danio rerio, olfactory bulb. Microglia were identified in the olfactory bulb using the 4c4 antibody and phagocytic-dependent labeling (DiA). Microglia responded to both methods of deafferentation namely, permanent (cautery) and temporary (Triton X- 100). On one and three days following both permanent and temporary deafferentation there was a significant increase in microglia in the treated olfactory bulb. At five and seven days after permanent and temporary deafferentation there was no longer a significant difference between the treated and untreated olfactory bulbs, …

Karenia Brevis Harmful Algal Blooms: Their Role In Structuring The Organismal Community On The West Florida Shelf, Alisha Marie Gray

USF Tampa Graduate Theses and Dissertations

Karenia brevis dinoflagellate blooms off the west coast of Florida can create devastating effects on marine communities when they release a neurotoxin known as a brevetoxin. These blooms, informally referred to as red tides, can cause massive fish kills, necessitate closures of shellfish fisheries, and can even leave lingering toxins that impact shelf communities long after the bloom has dissipated. As a result, much effort has been put into studying K. brevis bloom initiation and dynamics. However, how K. brevis blooms impact Florida's fisheries is not fully understood because the relationship between K. brevis cell counts and fish mortality is …

Identifying Factors Affecting The Low Western Rock Lobster Puerulus Settlement In Recent Years Final Frdc Report – Project 2009/18, Nick Caputi, Ming Feng, Simon De Lestang, Ainslie M. Denham, James D. Penn, Dirk Slawinski, Alan Pearce, Evan Weller, Jason R. How

Fisheries Research Reports

Objectives 1. To use a larval advection model and the rock lobster population dynamics model to assess the effect of the spatial distribution of the breeding stock on the puerulus settlement 2. To assess environmental factors (water temperature, current, wind, productivity, eddies) and breeding stock affecting puerulus settlement 3. To examine climate change trends of key environmental parameters and their effect on the western rock lobster fishery

Potential Eradication And Control Methods For The Management Of The Ascidian Didemnum Perlucidum In Western Australia, Julieta Muñoz, Justin I. Mcdonald

Fisheries Research Reports

In Western Australia, the invasive colonial ascidian Didemnum perlucidum was first detected in the Swan River Estuary in 2010 and subsequently recorded at multiple locations across the State. Ongoing research by the Department of Fisheries (the Department) indicates that this species exhibits strong seasonal changes in abundance. Although, D. perlucidum is able to reproduce sexually (larvae) and asexually (budding) year round, larvae density and settlement, and overall colony size significantly decreases during the colder months (winter). From a management point of view this period would present the best opportunity for an attempt at eradication or control of this species.

From The Inside Out, And Through., Dominique Ovalle

The Transdisciplinary STEAM+ Journal

These photographs describe “Science” born of consumerism, hijacked by me, economically disenfranchised, or rather—temporarily embarrassed, artist. I was putzing around Malibu—my old college stomping ground, looking for free food; maybe a sample of some gourmet $5 chocolate, and all I got were these photographs.