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Acute Toxicity And Behavioral Effects Of Chlorpyrifos, Permethrin, Phenol, Strychnine, And 2,4-Dinitrophenol To 30-Day-Old Japanese Medaka (Oryzias Latipes), Patricia J. Rice, Charles D. Drewes, Theresa M. Klubertanz, Steven P. Bradbury, Joel R. Coats 2017 Iowa State University

Acute Toxicity And Behavioral Effects Of Chlorpyrifos, Permethrin, Phenol, Strychnine, And 2,4-Dinitrophenol To 30-Day-Old Japanese Medaka (Oryzias Latipes), Patricia J. Rice, Charles D. Drewes, Theresa M. Klubertanz, Steven P. Bradbury, Joel R. Coats

Steven P. Bradbury

Five chemicals with different modes of action were evaluated in laboratory studies to determine their acute toxicity (48-h median lethal concentration [LC50]) and behavioral effects on 30-d-old Japanese medaka (Oryzias latipes). The order of toxicity for these xenobiotics was permethrin > chlorpyrifos > 2,4-dinitrophenol (2,4-DNP) > strychnine > phenol. The 48-h LC50s were significantly different and ranged from 0.011 to 24.1 mg/L. In addition, chlorpyrifos and permethrin accumulated in the tissues of juvenile O. latipes. Observations of five behavioral/morphological responses, including changes in equilibrium, general activity, startle response, and morphology (e.g., hemorrhage and deformities) were used as ...


A Simulation Model Of The Devils Hole Pupfish Population Using Monthly Length-Frequency Distributions, Maria Dzul, Stephen J. Dinsmore, Michael C. Quist, D. Bailey Gaines, Kevin Patrick Wilson, Michael Roy Bower, Philip M. Dixon 2017 Iowa State University

A Simulation Model Of The Devils Hole Pupfish Population Using Monthly Length-Frequency Distributions, Maria Dzul, Stephen J. Dinsmore, Michael C. Quist, D. Bailey Gaines, Kevin Patrick Wilson, Michael Roy Bower, Philip M. Dixon

Stephen J Dinsmore

The Devils Hole pupfish, Cyprinodon diabolis, is a federally-endangered fish that is endemic to Devils Hole, a discontiguous part of Death Valley National Park in Nye County, Nevada. Due to its status, Devils Hole pupfish monitoring must be non-obtrusive and thereby exclude techniques that require handling fish. Due to a recent decline in pupfish abundance, Devils Hole pupfish managers have expressed a need for a model that describes population dynamics. This population model would be used to identify vulnerable life history stage(s) and inform management actions. We constructed a set of individualbased simulation models designed to explore effects of ...


Bio-Economies Of Scope And The Discard Problem In Multiple Species Fisheries, Rajesh Singh, Quinn Weninger 2017 Iowa State University

Bio-Economies Of Scope And The Discard Problem In Multiple Species Fisheries, Rajesh Singh, Quinn Weninger

Rajesh Singh

This paper considers the problem of multi-species fisheries management when targeting individual species is costly and at-sea discards of fish by fishermen are unobserved by the regulator. Stock conditions, ecosystem interaction, technological specification, and relative prices under which at sea discards are acute are identified. A dynamic model is developed to balance ecological interdependencies among multiple fish species, and scope economies implicit in a costly targeting technology. Three regulatory regimes, species-specific harvest quotas, landing taxes, and revenue quotas, are contrasted against a hypothetical sole owner problem. An optimal plan under all regimes precludes discarding. For both very low and very ...


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 2017 Iowa State University

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

Michael J Weber Dr

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 ...


Continuous, Pulsed And Disrupted Nutrient Subsidy Effects On Ecosystem Productivity, Stability, And Energy Flow, Michael J. Weber, Michael L. Brown 2017 South Dakota State University

Continuous, Pulsed And Disrupted Nutrient Subsidy Effects On Ecosystem Productivity, Stability, And Energy Flow, Michael J. Weber, Michael L. Brown

Michael J Weber Dr

Resource pulses and subsidies can supply ecosystems with an important source of nutrients that supports additional productivity at multiple trophic levels. Common carp Cyprinus carpio provide ecosystems with a continuous nutrient subsidy through bioturbation and excretion but may also initiate a nutrient pulse through carcass decomposition. We examined how continuous (common carp foraging and excretion), pulsed (carcass decomposition) and disrupted (carp introduced and then removed) nutrient subsidies differed in their ability to alter nutrient availability, ecosystem productivity and stability and energy flow. Nitrogen and phosphorus availability and primary production were highest in pulsed, intermediate in continuous and lowest for disrupted ...


Across-Ecoregion Analysis Suggests A Hierarchy Of Ecological Filters That Regulate Recruitment Of A Globally Invasive Fish, Przemek G. Bajer, Timothy K. Cross, Joseph D. Lechelt, Christopher J. Chizinski, Michael J. Weber, Peter W. Sorensen 2017 University of Minnesota

Across-Ecoregion Analysis Suggests A Hierarchy Of Ecological Filters That Regulate Recruitment Of A Globally Invasive Fish, Przemek G. Bajer, Timothy K. Cross, Joseph D. Lechelt, Christopher J. Chizinski, Michael J. Weber, Peter W. Sorensen

Michael J Weber Dr

Aim -- Even successful invaders are abundant only in a fraction of locales they inhabit. One of the main challenges in invasion ecology is explaining processes that drive these patterns. We investigated recruitment of a globally invasive fish, common carp (Cyprinus carpio), across three ecoregions to determine the role of environmental characteristics, predatory communities and propagule pressure on the invasion process at coarse and fine spatial scales. Location -- Lakes across Northern Forest, Temperate Forest and Great Plains ecoregions of North America. Methods -- We used data from 567 lakes to model presence or absence of carp recruitment using environmental conditions (lake clarity ...


Microbiome Analyses Of Pacific White Shrimp (Litopenaeus Vannamei) Collected From Disparate Geographical Locations, Arun S. Seetharam, Emily Kawaler, Zhi-Qiang Du, Max F. Rothschild, Andrew J. Severin 2017 Iowa State University

Microbiome Analyses Of Pacific White Shrimp (Litopenaeus Vannamei) Collected From Disparate Geographical Locations, Arun S. Seetharam, Emily Kawaler, Zhi-Qiang Du, Max F. Rothschild, Andrew J. Severin

Max Rothschild

In this study, the tail muscle microbiota of pacific white shrimp (Litopenaeus vannamei) sourced from five countries across Central and South America and Southeast Asia were determined and compared. The genomic DNA was sequenced at around 10 × coverage for each geographical location and was assembled de novo for comparative analysis. The assembled sequences for all the lines were classified based on their similarity to the sequences in the public database. We found that there is high correlation among the microbiota of shrimp from disparate regions, as well as the presence of some DNA from bacteria known to cause food poisoning ...


Notes On Contributors, 2017 The University of Maine

Notes On Contributors

The Catch

No abstract provided.


The Mackerel Fishermen, Avery B. Stone 2017 Avery Booth Stone

The Mackerel Fishermen, Avery B. Stone

The Catch

No abstract provided.


Awakening, Angela M. Waldron 2017 Union, Maine

Awakening, Angela M. Waldron

The Catch

No abstract provided.


Little White House, Lawrence W. Conrad 2017 Summer resident Lubec, Maine

Little White House, Lawrence W. Conrad

The Catch

No abstract provided.


Editor's Note, Leonore Hildebrandt 2017 University of Maine

Editor's Note, Leonore Hildebrandt

The Catch

No abstract provided.


Full Issue Volume V, 2017 The University of Maine

Full Issue Volume V

The Catch

No abstract provided.


The Effect Of A Mycotoxin Deactivation Product On Growth Of Juvenile Rainbow Trout Fed Distillers Dried Grains, Wendy M. Sealey, Christopher G. Hooley, Kurt A. Rosentrater, T. Gibson Gaylord, Frederic T. Barrows 2017 United States Fish and Wildlife Service

The Effect Of A Mycotoxin Deactivation Product On Growth Of Juvenile Rainbow Trout Fed Distillers Dried Grains, Wendy M. Sealey, Christopher G. Hooley, Kurt A. Rosentrater, T. Gibson Gaylord, Frederic T. Barrows

Kurt A. Rosentrater

Distillers dried grains (DDG) with solubles (DDGS) is a product that has shown potential as a protein source for some fish species, but high inclusion rates of DDGS have not always been successfully achieved for Rainbow Trout Oncorhynchus mykiss. Our objective was to determine whether inclusion of a mycotoxin deactivation product (Biofix Plus) could improve the ability of high-protein DDG (HPDDG) to replace a portion of the fish meal in diets for Rainbow Trout. The 2 × 2 factorial feeding trial examined protein source (menhaden fish meal [MFM] or HPDDG) with or without Biofix Plus. A control diet (42% digestible protein ...


Relations Between Stream Chemistry, Fish Diversity, And Land Use In The Upper Little Miami Watershed, Connor J. Gilmour, Randy Howell, David Paulding, Charles W. Reynolds, Mark A. Gathany 2017 Cedarville University

Relations Between Stream Chemistry, Fish Diversity, And Land Use In The Upper Little Miami Watershed, Connor J. Gilmour, Randy Howell, David Paulding, Charles W. Reynolds, Mark A. Gathany

Mark A. Gathany, Ph.D.

Streams are susceptible to numerous threats to their water quality and biodiversity. In southwest Ohio a major driver of these impacts is associated with current agricultural practices and associated legacy effects. These structural and chemical impacts are known to affect biodiversity in these streams. The objective of this study was to document and examine relationships among land-use/land cover, stream chemistry, and fish diversity in the headwaters streams of the Little Miami Watershed. Three streams (Little Miami River, Massies Creek - North Fork, and Massies Creek - South Fork) were sampled in the upper headwaters as well as downstream. Air and water ...


Response Of Littoral Invertebrates To Reduction Of Fish Density: Simultaneous Experiments In Ponds With Different Fish Assemblages, Clay L. Pierce, Bruce D. Hinrichs 2017 United States Geological Survey

Response Of Littoral Invertebrates To Reduction Of Fish Density: Simultaneous Experiments In Ponds With Different Fish Assemblages, Clay L. Pierce, Bruce D. Hinrichs

Clay L. Pierce

We experimentally reduced densities of predatory fish in replicated 2 m2 areas of the littoral zone in two ponds to test whether density and biomass of invertebrates would respond to release from fish predation. The ponds are of similar size and in close proximity, but support different fish assemblages: bluegills (Lepomis macrochirus Rafinesque) and largemouth bass (Micropterus salmoides (Lacepede)) in one pond, and bluespotted sunfish (Enneacanthus gloriosus (Holbrook)) and chain pickerel (Esox niger Lesueur) in the other. Fish densities were reduced to less than 15% of ambient levels in both experiments. In the bluegill–bass pond, density and biomass of ...


Back-Calculation Of Fish Length From Scales: Empirical Comparison Of Proportional Methods, Clay L. Pierce, Joseph B. Rasmussen, William C. Leggett 2017 National Biological Service

Back-Calculation Of Fish Length From Scales: Empirical Comparison Of Proportional Methods, Clay L. Pierce, Joseph B. Rasmussen, William C. Leggett

Clay L. Pierce

We compared three proportional back-calculation methods for scales using data sets for pumpkinseeds Lepomis gibbosus and golden shiners Notemigonus crysoleucas from 10 southern Quebec lakes, and we validated back-calculations by comparing them with observed lengths at lime of annulus formation. Ordinary least-squares regression (OR) was compared with geometric mean regression (GMR) for describing body-scale relationships. Although minor differences were detected in body-scale regressions among lakes, pooling data across lakes yielded linear bodyscale relationships with very high r2. Differences between OR and GMR body-scale relationships were negligible in both species. Likewise, all back-calculation methods produced equivalent results. Back-calculated lengths generally corresponded ...


Status Of The Topeka Shiner In West-Central Iowa, Bryan David Bakevich, Clay L. Pierce, Michael C. Quist 2017 Iowa State University

Status Of The Topeka Shiner In West-Central Iowa, Bryan David Bakevich, Clay L. Pierce, Michael C. Quist

Clay L. Pierce

The Topeka shiner Notropis topeka is a federally endangered fish species that is estimated to occupy only 20% of its historic range. In Iowa Topeka shiners have been in decline for decades. Our goal was to determine the present distribution of Topeka shiners in the west-central portion of their range in Iowa and to characterize the extent of its decline. We compared the current distribution to distributions generated from earlier collections. We found Topeka shiners in six of 22 watersheds where they occurred historically. Status of Topeka shiners was judged to be stable in 27% of the watersheds, at risk ...


Hydrological Alteration Along The Missouri River Basin: A Time Series Approach, Mark A. Pegg, Clay L. Pierce, Anindya Roy 2017 United States Geological Survey

Hydrological Alteration Along The Missouri River Basin: A Time Series Approach, Mark A. Pegg, Clay L. Pierce, Anindya Roy

Clay L. Pierce

Human alteration of large rivers is commonplace, often resulting in significant changes in flow characteristics. We used a time series approach to examine daily mean flow data from locations throughout the mainstem Missouri River. Data from a pre-alteration period (1925–1948) were compared with a post-alteration period (1967–1996), with separate analyses conducted using either data from the entire year or restricted to the spring fish spawning period (1 April–30 June). Daily mean flows were significantly higher during the post-alteration period at all locations. Flow variability was markedly reduced during the post-alteration period as a probable result of flow ...


The Shellfish Corner: How Many Shellfish Can I Grow On My Farm?, Michael A. Rice 2017 University of Rhode Island

The Shellfish Corner: How Many Shellfish Can I Grow On My Farm?, Michael A. Rice

Michael A Rice

For many shellfish farmers a key question is how many shellfish could be grown on their farms, but more importantly, how many shellfish could be grown to maximize farm profitability or overall long-term sustainability with minimal environmental impact. The various measures of carrying capacity of shellfish farms are explained.


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