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2010

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Articles 1 - 30 of 122

Full-Text Articles in Aquaculture and Fisheries

Utilization Of Diets Containing Graded Levels Of Ethanol Production Co-Products By Nile Tilapia, Travis W. Schaeffer, Michael L. Brown, Kurt A. Rosentrater, Kasiviswanathan Muthukumarappan Dec 2010

Utilization Of Diets Containing Graded Levels Of Ethanol Production Co-Products By Nile Tilapia, Travis W. Schaeffer, Michael L. Brown, Kurt A. Rosentrater, Kasiviswanathan Muthukumarappan

Kurt A. Rosentrater

A feeding trial was performed to investigate inclusion levels of distillers dried grains with solubles (DDGS) as a fishmeal replacement for juvenile Nile tilapia (Oreochromis niloticus). On a dry matter basis, five isocaloric [19.3 ± 0.4 kJ/g (mean ± SE)], isonitrogenous (39.1 ± 0.5% crude protein) diets were formulated to contain 17.5%, 20%, 22.5%, 25%, and 27.5% DDGS and compared against a 0% DDGS, reference diet (gross energy = 14.5 kJ/g; crude protein = 39.8%). The reference diet resulted in significantly higher body weight gain (BWG), food conversion ratio (FCR), and protein efficiency ratio ...


Communication For Mate Selection In Anurans: Dominant Frequency Versus Snout-Vent-Length, Shari Jean Kunert Dec 2010

Communication For Mate Selection In Anurans: Dominant Frequency Versus Snout-Vent-Length, Shari Jean Kunert

Environmental Studies Undergraduate Student Theses

No abstract provided.


Life History And Habitat Use Of The Juvenile Alabama Shad (Alosa Alabamae) In Northern Gulf Of Mexico Rivers, Paul Fraser Mickle Dec 2010

Life History And Habitat Use Of The Juvenile Alabama Shad (Alosa Alabamae) In Northern Gulf Of Mexico Rivers, Paul Fraser Mickle

Dissertations

The Alabama shad, Alosa alabamae, is an anadromous species that is in decline and has seen extirpations from impoundments as well as decreased water quality. Alabama shad live in the Gulf of Mexico and ascend Northern Gulf of Mexico Drainages to reproduce early in the year (January-May). The juveniles spend the majority of the year in these freshwater systems before emigrating out to the Gulf of Mexico as late as December.

This dissertation focuses on the juvenile life stages that occur within the Northern Gulf of Mexico drainages. Spawning conditions of the river, as well as the habitat and diet ...


Reproductive Life History Of Fundulus Jenkensi And Comparative Development Of Five Sympatric Fundulid Species, Eric Thomas Lang Dec 2010

Reproductive Life History Of Fundulus Jenkensi And Comparative Development Of Five Sympatric Fundulid Species, Eric Thomas Lang

Master's Theses

Fundulus jenkinsi 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 F. jenkinsi and a diagnostic key of the early life stages of select members of Fundulidae can provide the foundation needed to accurately identify it and quantify reproductive parameters in this rare species in need of conservation. Monthly gonadosomatic index (GSI) of male and female F. jenkinsi were documented, and spawning phases and oocyte stages were examined using reproductive histology. In addition, various stages of coastal ...


Influence Of Physiochemical And Watershed Characteristics On Mercury Concentration In Walleye, Sander Vitreus, M., Cari-Ann Hayer, Steven R. Chipps, J. J. Stone Dec 2010

Influence Of Physiochemical And Watershed Characteristics On Mercury Concentration In Walleye, Sander Vitreus, M., Cari-Ann Hayer, Steven R. Chipps, J. J. Stone

Natural Resource Management Faculty Publications

Elevated mercury concentration has been documented in a variety of fish and is a growing concern for human consumption. Here, we explore the influence of physiochemical and watershed attributes on mercury concentration in walleye (Sander vitreus, M.) from natural, glacial lakes in South Dakota. Regression analysis showed that water quality attributes were poor predictors of walleye mercury concentration (R2 = 0.57, p = 0.13). In contrast, models based on watershed features (e.g., lake level changes, watershed slope, agricultural land, wetlands) and local habitat features (i.e., substrate composition, maximum lake depth) explained 81% (p = 0.001) and 80 ...


Assessing Linkages Among Landscape Characteristics, Stream Habitat, And Macroinvertebrate Communities In The Idaho Batholith Ecoregion, Andrew C. Hill Dec 2010

Assessing Linkages Among Landscape Characteristics, Stream Habitat, And Macroinvertebrate Communities In The Idaho Batholith Ecoregion, Andrew C. Hill

All Graduate Theses and Dissertations

Understanding the composition of lotic communities and the landscape processes and habitat characteristics that shape them is one of the main challenges confronting stream ecologists. In order to better understand the linkages among landscape processes, stream habitat, and biological communities and to understand how accurately our measurements represent important factors influencing biological communities, it is important to test explicit hypotheses regarding these linkages. Increasing our understanding of aquatic communities in a hierarchical context and recognizing how well our measurements represent factors structuring aquatic communities will help managers better evaluate the influence of land management practices on aquatic ecosystems, direct conservation ...


Evaluation Of Harassment Of Migrating Double-Crested Cormorants To Limit Depredation On Selected Sport Fisheries In Michigan, Brian S. Dorr, Ashley Moerke, Michael Bur, Chuck Bassett, Tony Aderman, Dan Traynor, Russell D. Singleton, Peter H. Butchko, Jimmy D. Taylor Nov 2010

Evaluation Of Harassment Of Migrating Double-Crested Cormorants To Limit Depredation On Selected Sport Fisheries In Michigan, Brian S. Dorr, Ashley Moerke, Michael Bur, Chuck Bassett, Tony Aderman, Dan Traynor, Russell D. Singleton, Peter H. Butchko, Jimmy D. Taylor

Brian S Dorr

No abstract provided.


Diatoms As Indicators Of Water-Level Change In Freshwater Lakes, Julie A. Wolin, Jeffrey R. Stone Nov 2010

Diatoms As Indicators Of Water-Level Change In Freshwater Lakes, Julie A. Wolin, Jeffrey R. Stone

Biological, Geological, and Environmental Faculty Publications

Water-level changes result from a variety of geological, biological, and/or climatic processes. Many of these changes occur over long periods; others may be rapid or result from catastrophic events. In aquatic environments, diatoms are highly sensitive indicator organisms and their microfossils, deposited in lake sediments, can be used to infer environmental changes (Smol, 2008). Unambiguous diatom signals can be reconstructed from lakes isolated from marine or brackish waters (e.g. Fritz et al., this volume; Horton & Sawai, this volume). However, in freshwater systems lake-level changes are often recorded as increases in planktonic (free-floating) diatoms – although as discussed below, interpretation ...


Biology, Prevention, And Effects Of Common Grubs (Digenetic Trematodes) In Freshwater Fish, Ryan L. Lane, Joseph E. Morris Nov 2010

Biology, Prevention, And Effects Of Common Grubs (Digenetic Trematodes) In Freshwater Fish, Ryan L. Lane, Joseph E. Morris

NCRAC Technical Bulletins

Digenetic trematodes (class Trematoda) often plague pond-reared fishes. Most digenetic trematodes are not a serious threat to fish health; however, their mere presence often renders the fish undesirable by consumers. The black grub (Uvulifer ambloplitis), white grub (Posthodiplostomum minimum), and yellow grub (Clinostomum complanatum) are commonly seen digenetic trematodes in fish in earthen ponds located in the North Central Region of the United States. The purpose of this publication is to discuss the biology and prevention of these parasites, along with their effect on infected fish. Hereafter, these digenetic trematodes will be referred to as “grubs”.


Processing Aquaculture System Biosolids By Worm Composting—Vermicomposting, Steven E. Yeo, Frederick P. Binkowski Nov 2010

Processing Aquaculture System Biosolids By Worm Composting—Vermicomposting, Steven E. Yeo, Frederick P. Binkowski

NCRAC Technical Bulletins

Recirculating Aquaculture Systems (RAS) use less water than open pond systems and the concentrated wastes generated by fish in RAS are easier to collect and reuse. High operating costs limit RAS use to high-value species production. One strategy to improve productivity and offset the high operating costs is to convert the solid waste from the aquaculture systems to more valuable byproducts.


Match- Mismatch Regulation For Bluegill And Yellow Perch Larvae And Their Prey In Sandhill Lakes, Jeffrey C. Jolley, David W. Willis, Richard S. Holland Nov 2010

Match- Mismatch Regulation For Bluegill And Yellow Perch Larvae And Their Prey In Sandhill Lakes, Jeffrey C. Jolley, David W. Willis, Richard S. Holland

Natural Resource Management Faculty Publications

Food availability may regulate fish recruitment, both directly and indirectly. The availability of zooplankton, especially to newly hatched larvae, is thought to be crucial to their early growth and survival. We examined stomach contents of larval bluegill Lepomis macrochirus and yellow perch Perca flavescens in Pelican Lake and Cameron Lake, Nebraska, in 2004 and 2005. We also determined zooplankton availability and calculated prey selection using Chesson’s a. In addition, we investigated potential match–mismatch regulation of recruitment from 2004 to 2008. Bluegill positively selected copepod nauplii and Bosmina spp., and yellow perch often selected copepods. Abundant zooplankton populations were ...


Life History, Trophic Ecology, & Prey Handling By Cownose Ray, Rhinoptera Bonasus, From Chesapeake Bay, Robert A. Fisher Nov 2010

Life History, Trophic Ecology, & Prey Handling By Cownose Ray, Rhinoptera Bonasus, From Chesapeake Bay, Robert A. Fisher

Reports

No abstract provided.


Tilapia: Environmental Biology And Nutritional Requirements, Kamal Mjoun, Kurt A. Rosentrater, Michael L. Brown Oct 2010

Tilapia: Environmental Biology And Nutritional Requirements, Kamal Mjoun, Kurt A. Rosentrater, Michael L. Brown

Kurt A. Rosentrater

Tilapia is one of the most widely cultured fish in the world. Currently, farmed tilapia represents more than 75% of world tilapia production (FAO, 2009), and this contribution has been exponentially growing in recent years. Several factors have contributed to the rapid global growth of tilapia. Tilapia are easily cultured and highly adaptable to a wide range of environmental conditions. Tilapia feed on a wide variety of dietary sources, including phytoplankton, periphyton, zooplanktons, larval fish, and detritus. Adult tilapia are principally herbivorous but readily adapt to complete commercial diets based on plant and animal protein sources. In the United States ...


Tilapia: Profile And Economic Importance, Kamal Mjoun, Kurt A. Rosentrater, Michael L. Brown Oct 2010

Tilapia: Profile And Economic Importance, Kamal Mjoun, Kurt A. Rosentrater, Michael L. Brown

Kurt A. Rosentrater

Tilapia is the common name broadly applied to a group of cichlid fishes native to Africa, the Mediterranean, and the Middle East. Tilapia are some of the oldest cultured fishes, as depicted in line drawings found in Egyptian tombs that date back to 2000 BC. This group consists of three economically important genera, which are taxonomically distinguished according to their reproductive behaviors: Tilapia, Oreochromis, and Sarotherodon, all are commonly known as “tilapia.” Tilapia are biparental caring-substrate spawners; Oreochromis are generally maternal mouth brooders; and Sarotherodon are generally paternal or biparental mouth brooders. Currently, Nile tilapia (Oreochromis niloticus; fig. 1) and ...


Unlv Magazine, Tony Allen, Shane Bevell, Donna Mcaleer, Ched Whitney, Cate Weeks Oct 2010

Unlv Magazine, Tony Allen, Shane Bevell, Donna Mcaleer, Ched Whitney, Cate Weeks

UNLV Magazine

No abstract provided.


Comparisons Of Fish Species Inside And Outside Of Marine Protected Areas Off The South Central Coast Of California, David E. Rasmussen Oct 2010

Comparisons Of Fish Species Inside And Outside Of Marine Protected Areas Off The South Central Coast Of California, David E. Rasmussen

Master's Theses and Project Reports

COMPARISONS OF FISH SPECIES INSIDE AND OUTSIDE OF MARINE PROTECTED AREAS OFF THE SOUTH CENTRAL COAST OF CALIFORNIA

David E. Rasmussen

From 2004-2008 and 2008-2009 Cal Poly University researchers conducted two separate tag and recapture studies of nearshore fish populations along California’s central coast. Three locations were sampled that have experienced different degrees of fishing pressure. Big Creek MPA has been closed to all fishing from 1993 onwards and is the farthest from port of all locations. Cambria lies closest to port of the three locations and because of this has the highest fishing pressure. Piedras Blancas lies midway ...


An Examination Of Methods: Hand Picking Red Crabs And Keeping Them Alive On Shore, Dan Kauffman, Bob Fisher Oct 2010

An Examination Of Methods: Hand Picking Red Crabs And Keeping Them Alive On Shore, Dan Kauffman, Bob Fisher

Reports

No abstract provided.


Estuarine Blue Infrastructure: Final Priority Conservation Areas For Chesapeake Bay And Its Tidal Tributaries And Back Bay – Version 2.0 (Revised 09/2010), Center For Coastal Resources Management, Virginia Institute Of Marine Science Sep 2010

Estuarine Blue Infrastructure: Final Priority Conservation Areas For Chesapeake Bay And Its Tidal Tributaries And Back Bay – Version 2.0 (Revised 09/2010), Center For Coastal Resources Management, Virginia Institute Of Marine Science

Reports

This project is an extension of earlier efforts within the coastal zone of Virginia to build a platform for enhanced Blue and Green Infrastructure planning. This project is motivated by an interest in extending statewide conservation efforts into estuarine systems and recognition that land use decisions on the upland effect water quality and habitat health in the receiving waters. The project in its entirety has been accomplished in distinct parts. Part one develops a Cumulative Resource Assessment to evaluate the distribution of aquatic natural resources within waters of Virginia’s Chesapeake Bay waters, Back Bay of Virginia Beach, Virginia, and ...


Growth Of Atlantic Salmon (Salmo Salar) In Freshwater, Douglas Bradlee Sigourney Sep 2010

Growth Of Atlantic Salmon (Salmo Salar) In Freshwater, Douglas Bradlee Sigourney

Open Access Dissertations

Growth plays a key role in regulating ecological and population dynamics. Life history characteristics such as age at maturity, fecundity and age and size at migration are tightly linked to growth rate. In addition, size can often determine survival and individual breeding success. To fully understand the process of growth it is important to understand the mechanisms that drive growth rates. In Atlantic salmon, growth is critical in determining life history pathways. Models to estimate growth could be useful in the broader context of predicting population dynamics. In this dissertation I investigate the growth process in juvenile Atlantic salmon (Salmo ...


Evaluating Recruitment Of American Eel, Anguilla Rostrata, In The Potomac River (Spring 2010), Troy D. Tuckey, Mary C. Fabrizio Sep 2010

Evaluating Recruitment Of American Eel, Anguilla Rostrata, In The Potomac River (Spring 2010), Troy D. Tuckey, Mary C. Fabrizio

Reports

The Atlantic States Marine Fisheries Commission (ASMFC) adopted the Interstate Fishery Management Plan (FMP) for the American eel in November 1999. The FMP focuses on increasing coastal states’ efforts to collect American eel data through both fishery-dependent and fishery-independent studies. Consequently, member jurisdictions agreed to implement an annual survey for young of year (YOY) American eels. The survey is intended to “…characterize trends in annual recruitment of the YOY eels over time [to produce a] qualitative appraisal of the annual recruitment of American eel to the U.S. Atlantic Coast” (ASMFC 2000). The development of these surveys began in 2000 ...


An Assessment Of Sea Scallop Abundance And Distribution In Selected Closed Areas: Georges Bank Closed Area I And Hudson Canyon Closed Area, David B. Rudders, William D. Dupaul Aug 2010

An Assessment Of Sea Scallop Abundance And Distribution In Selected Closed Areas: Georges Bank Closed Area I And Hudson Canyon Closed Area, David B. Rudders, William D. Dupaul

Reports

No abstract provided.


The Effects Of Growth Hormone In The Inner Ear Of Zebrafish (Danio Rerio) During Hair Cell Regeneration, Chia-Hui Lin Aug 2010

The Effects Of Growth Hormone In The Inner Ear Of Zebrafish (Danio Rerio) During Hair Cell Regeneration, Chia-Hui Lin

Masters Theses & Specialist Projects

Although deafness is a universal problem, effective treatments have remained elusive. In order to develop potential treatments, an overall understanding of the cellular process of auditory hair cell regeneration, which occurs in fish but not mammals, must be established. A previous microarray analysis and qRT-PCR validation of noise-exposed zebrafish showed that growth hormone (GH) was significantly upregulated during the process of auditory hair cell regeneration. Thus, GH may play an important role during hair cell regeneration. However, cellular effects of exogenous GH in the zebrafish auditory hair cell regeneration have not been examined after noise exposure. To understand the effect ...


Environment-Induced Phenotypic Plasticity In The Teeth Of Hatchery And Wild Largemouth Bass, Micropterus Floridanus, Tamilselvi Selvaraj Aug 2010

Environment-Induced Phenotypic Plasticity In The Teeth Of Hatchery And Wild Largemouth Bass, Micropterus Floridanus, Tamilselvi Selvaraj

Masters Theses & Specialist Projects

Successful stock enhancement of hatchery-reared fish depends heavily on the release of individuals able to demonstrate strong survival skills. Overall survival of fishes is a reflection of a successful blend of physiology, anatomy, and behavior. With fishes being highly phenotypically plastic, the potential exists for all aspects of hatcheryreared fish to vary significantly from their wild counterparts while having potentially adverse effects on their survival after release. Previous analyses have demonstrated significant differences between the feeding behavior of hatchery-reared and wild caught largemouth bass (Micropterus floridanus) in the laboratory, as well as differences in the development of the skull between ...


Age, Reproduction, Growth, Condition And Diet Of The Introduced Yellow Bass, Morone Mississippiensis, In Barren River Lake, Kentucky, Peter G. Zervas Aug 2010

Age, Reproduction, Growth, Condition And Diet Of The Introduced Yellow Bass, Morone Mississippiensis, In Barren River Lake, Kentucky, Peter G. Zervas

Masters Theses & Specialist Projects

Introduction of fish species to North American drainages has occurred for over 100 years. Introduced fish species have been documented to have adverse effects on both the environment and native species of the drainage into which they have been introduced. To better understand the effects that introduced species may have on a particular drainage, it is essential to understand aspects of the introduced species’ life history. The objectives of the current study is to quantify the age, reproduction, growth, condition and diet of the yellow bass, Morone mississippiensis, in Barren River Lake, Kentucky. Monthly collections from three areas on Barren ...


2010 Annual Report Estimating Relative Juvenile Abundance Of Ecologically Important Finfish In The Virginia Portion Of Chesapeake Bay Project Number: F-104-R-14, Troy D. Tuckey, Mary C. Fabrizio Jul 2010

2010 Annual Report Estimating Relative Juvenile Abundance Of Ecologically Important Finfish In The Virginia Portion Of Chesapeake Bay Project Number: F-104-R-14, Troy D. Tuckey, Mary C. Fabrizio

Reports

No abstract provided.


In Vitro Enabling Technologies For Use In The Aquatic Environment, Colm J. O'Dowd Jul 2010

In Vitro Enabling Technologies For Use In The Aquatic Environment, Colm J. O'Dowd

Doctoral

O’Dowd, C., Mothersill, C.E., Cairns, M.T., Austin, B., Lyng, F.M., McClean, B. and Murphy, J.E.J. Assessing the mitochondrion as a biomarker of fish tissue damage using g radiation as a stress model in vitro.

There is an ever-increasing need for biomarkers to identify toxic stress in the aquatic environment. Such techniques need to be accurate, expeditious, ethical and economical. Typically, in vitro based platforms fit these criteria however many of these systems often undergo ‘assay drift’ and consequently do not fully represent the real-life situation.

In recent years, there has been growing interest in ...


Marine Resource Bulletin Vol. 42, No. 2, Virginia Sea Grant, Virginia Institute Of Marine Science Jul 2010

Marine Resource Bulletin Vol. 42, No. 2, Virginia Sea Grant, Virginia Institute Of Marine Science

Virginia Marine Resource Bulletin

In This Issue

Scientists in the Classroom 2

The PERFECT Program is taking marine science graduate smdents out of their labs and into K-12 classrooms. Last year, nine VIMS smdents taught in local schools and developed their science communication skills in the process. This fall, a new cohort of scientists-in-training is poised to enter the program.

Spadefish Aquaculture 8

VIMS and Virginia Sea Grant researchers have reared this popular sportfish through the entire life cycle in captivity, opening the way to farming the species for food, for the aquarium trade, or for stock enhancement.

Planning Underwater I0

More and more ...


Production Of Walleye As Potential Food Fish, R. C. Summerfelt, R. D. Clayton, J. A. Johnson, R. E. Kinnunen Jul 2010

Production Of Walleye As Potential Food Fish, R. C. Summerfelt, R. D. Clayton, J. A. Johnson, R. E. Kinnunen

NCRAC Extension Fact Sheets

Walleye is a prized sport and food fish and is often on the menu of white tablecloth restaurants throughout the Great Lakes/ North Central Region (NCR) of the U.S. Commercial fisheries for walleye in the Canadian portion of Lake Erie, inland lakes in Canada, and a few tribal fisheries in U.S. These sources provide fish that are distributed by brokers for retail food chains and restaurants. The Freshwater Fish Marketing Corporation (FFMC) of Winnipeg, Canada, purchases 7 to 11 million lbs (3.2 to 5 million kg) of walleye each year, and then processes, packages, and markets them ...


Estimated Economic Impact Of Gulf Oil Spill On Virginia’S Oyster Industry – July 2010, Thomas J. Murray, James E. Kirkley Jul 2010

Estimated Economic Impact Of Gulf Oil Spill On Virginia’S Oyster Industry – July 2010, Thomas J. Murray, James E. Kirkley

Reports

No abstract provided.


Marine Natural Products, The Halogenated 1'-Methyl-1,2'-Bipyrroles, Biomagnify In A Northwestern Atlantic Food Web., Kristin C. Pangallo, Christopher M. Reddy Jun 2010

Marine Natural Products, The Halogenated 1'-Methyl-1,2'-Bipyrroles, Biomagnify In A Northwestern Atlantic Food Web., Kristin C. Pangallo, Christopher M. Reddy

Kristin Pangallo

Halogenated 1′-methyl-1,2′-bipyrroles (MBPs) are putative marine natural products that accumulate in marine mammal blubber in similar concentrations and patterns to biomagnifying organic pollutants. Here we measure concentrations of MBPs and 2,2′,4,4′,5,5′-hexachlorobiphenyl (CB-153) in 40 samples composed of eight fish species, two squid species, and six species of marine mammals. To determine their trophic positions and to further investigate influence of prey preference, we also measured the stable carbon and nitrogen isotopic compositions of all samples. Our results show that lipid-normalized MBP concentrations increase with increasing trophic level; therefore, MBPs qualify as ...