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Articles 1 - 30 of 284
Full-Text Articles in Life Sciences
The Status Of Fishes In The Missouri River, Nebraska: Shoal Chub (Macrhybopsis Hyostoma), Sturgeon Chub (M. Gelida), Sicklefin Chub (M. Meeki), Silver Chub (M. Storeriana), Flathead Chub (Platygobio Gracilis), Plains Minnow (Hybognathus Placitus), Western Silvery Minnow (H. Argyritis), And Brassy Minnow (H. Hankinsoni), Kirk D. Steffensen, Dane A. Shuman, Sam Stukel
The Status Of Fishes In The Missouri River, Nebraska: Shoal Chub (Macrhybopsis Hyostoma), Sturgeon Chub (M. Gelida), Sicklefin Chub (M. Meeki), Silver Chub (M. Storeriana), Flathead Chub (Platygobio Gracilis), Plains Minnow (Hybognathus Placitus), Western Silvery Minnow (H. Argyritis), And Brassy Minnow (H. Hankinsoni), Kirk D. Steffensen, Dane A. Shuman, Sam Stukel
Transactions of the Nebraska Academy of Sciences and Affiliated Societies
Throughout the past century, the Missouri River has been highly modified which has negatively affected the native fish community. Previous research quantified the reduction of several native Cyprinidae species and made several recommendations to aid in recovery. However, these recommendations were not implemented. Therefore, the objective of this paper is to assess the current population trends of eight native cyprinid species and develop the current management objectives. Over 335,000 fish were collected from the Missouri River along Nebraska’s eastern border with mini-fyke nets and otter trawls from 2003 to 2012. Target Cyprinidae species consisted of less than five percent (n …
The Status Of Fishes In The Missouri River, Nebraska: Sauger (Sander Canadensis), Kirk D. Steffensen, Sam Stukel, Dane A. Shuman
The Status Of Fishes In The Missouri River, Nebraska: Sauger (Sander Canadensis), Kirk D. Steffensen, Sam Stukel, Dane A. Shuman
Transactions of the Nebraska Academy of Sciences and Affiliated Societies
Early fisheries investigation of the Missouri River fish community indicated that Sauger were common throughout Nebraska, including all major Missouri River tributaries. However due to many factors, their current range is restricted to the Missouri River and the lower reaches of a few tributaries. Hesse (1994) recommended listing Sauger as a state endangered species but this recommendation was never implemented. Therefore, the objective of this paper is to reevaluate the current population status of Sauger in the Missouri River along Nebraska’s border. Over 2,100 Sauger have been captured from the Missouri River along Nebraska’s eastern border since 2003. Sauger were …
Interactions Between Short-Beaked Common Dolphin (Delphinus Delphis) And The Winter Pelagic Pair-Trawl Fishery Ff Southwest England (Uk), Marijke N. De Boer, James T. Saulino, Mardik F. Leopold, Peter J.H. Reijnders, Mark P. Simmonds
Interactions Between Short-Beaked Common Dolphin (Delphinus Delphis) And The Winter Pelagic Pair-Trawl Fishery Ff Southwest England (Uk), Marijke N. De Boer, James T. Saulino, Mardik F. Leopold, Peter J.H. Reijnders, Mark P. Simmonds
Mark P. Simmonds, OBE
During offshore and onshore studies (2004 to 2009), the interactions between pair-trawls and short-beaked common dolphins (Delphinus delphis) were studied to better understand the impact of bycatch. A ‘hotspot’ area where pair-trawls overlapped with high dolphin abundance was identified. We made comparisons between boat-based data collected in absence and presence of pair-trawlers. The relative abundance and group-size of dolphins was significantly higher in the presence of pair-trawlers. Dolphins were observed associating with towing and hauling procedures. Significantly, more carcasses occurred in areas with hauling-activity than those without. Body-temperatures obtained from carcasses found near operating pair-trawlers indicated that bycatch mostly occurred …
Biological And Physiological Condition Of Juvenile California Halibut (Paralichthys Californicus) Exposed To A Contamination Gradient In Mission Bay, Ca, Kevin Stolzenbach
Biological And Physiological Condition Of Juvenile California Halibut (Paralichthys Californicus) Exposed To A Contamination Gradient In Mission Bay, Ca, Kevin Stolzenbach
Theses
Contaminated sediments in marine environments have been shown to be good indicators of ecological risk and a means to assess anthropogenic impacts on marine habitats and the animals that inhabit them (Long et al. 1995, Rattner 2009). Estuarine sediments are especially complex media with regard to physical, chemical, and biological characteristics that trap, store, modify and sometimes release contaminants to the biota (Long et al. 1995). Especially vulnerable are animals that are in constant contact with the sediments, such as flatfishes that partially bury themselves for camouflage (Costa et al. 2011). Impacts can be assessed in a number of ways, …
Cascades Island Lamprey Passage Structure: Evaluating Passage And Migration Following Structure Modifications, Siena Marie Lopez-Johnston
Cascades Island Lamprey Passage Structure: Evaluating Passage And Migration Following Structure Modifications, Siena Marie Lopez-Johnston
Dissertations and Theses
Pacific lamprey (Entosphenus tridentatus), an endemic species to the Columbia River Basin, U.S.A, has experienced staggering decreases in returns to spawning territories in recent decades. As lamprey are threatened severely by a lack of passage at mainstem dams, lamprey specific passage structures have been designed and constructed to address the problem. The Cascades Island Lamprey Passage Structure (LPS) at Bonneville Dam is the longest and steepest structure of its type, following the addition of an exit pipe which allows lampreys to travel from the tailrace of the dam to the forebay. The intent of this study was to …
Management Of Channel Catfish Ictalurus Punctatus In The Missouri River, Nebraska, Brandon L. Eder
Management Of Channel Catfish Ictalurus Punctatus In The Missouri River, Nebraska, Brandon L. Eder
School of Natural Resources: Dissertations, Theses, and Student Research
The popularity of catfish Ictaluridae nationally as a sport fish is well documented and angling for catfish on the Missouri River in Nebraska (NMR) is especially popular. Catfish monitoring program by the Nebraska Game and Parks Commission (NGPC) began in 1974 and several short-term evaluations of Channel Catfish population dynamics have been performed. However, no long term analyses of population characteristics have been conducted since the early 1990s. The focus of this research was to summarize the status of Channel Catfish populations in the NMR and give recommendations for future management. I summarized population characteristics, modeled length limit regulations, and …
Phosphorus Recycling By Profunda Quagga Mussels In Lake Michigan, Caroline Mosley
Phosphorus Recycling By Profunda Quagga Mussels In Lake Michigan, Caroline Mosley
Theses and Dissertations
Quagga mussels (Dreissena rostiformis bugensis) act as ecosystem engineers in the southern basin of Lake Michigan, altering physical habitats and biogeochemical processes. Adapted to cold and oligotrophic conditions, profunda quagga mussels thrive on the soft substrate of deeper depths. At a 55 m site (10,000 mussels m-2) offshore from Milwaukee, WI, profunda mussel biomass (g m-2) was 1/3 of biomass (g m-2) measured at a 10 m comparison site (5,000 mussels m-2). Higher densities but less biomass is due to profunda mussels having less tissue for a given length and the population per m2 comprising of mostly small mussels ( …
Web 2.0 Y Medios Sociales Para El Desarrollo En Pesca Y Acuicultura. En Ruta Hacia Las Redes Sociales, ¿Cuál Puede Ser Un Itinerario De Puesta En Marcha?, Enrique Wulff
Enrique Wulff
El modelo usado por la antigua red, en base a carpetas compartidas y repositorios, para desarrollar nuevos contenidos y transmitirlos se agota. En éste libro se propone recordar que si nadie visita tu página, que si uno se limita a hablar de si mismo sin formular preguntas, que si por el contrario facilita respuestas y las promociona construyendo algo excitante, si establece objetivos trimestrales, y si siempre tiene un horizonte a largo término. Entonces accede a las nuevas y fáciles de usar herramientas que se conocen como Web 2.0, las cuales conectan gente dando lugar a redes sociales, colaborando y …
Recruitment Facilitation And Spatial Pattern Formation In Soft-Bottom Mussel Beds, John A. Commito, Ann E. Commito, Rutherford V. Platt, Benjamin M. Grupe, Wendy Dow Piniak, Natasha J. Gownaris, Kyle A. Reeves, Allison M. Vissichelli
Recruitment Facilitation And Spatial Pattern Formation In Soft-Bottom Mussel Beds, John A. Commito, Ann E. Commito, Rutherford V. Platt, Benjamin M. Grupe, Wendy Dow Piniak, Natasha J. Gownaris, Kyle A. Reeves, Allison M. Vissichelli
Environmental Studies Faculty Publications
Mussels (Mytilus edulis) build massive, spatially complex, biogenic structures that alter the biotic and abiotic environment and provide a variety of ecosystem services. Unlike rocky shores, where mussels can attach to the primary substrate, soft sediments are unsuitable for mussel attachment. We used a simple lattice model, field sampling, and field and laboratory experiments to examine facilitation of recruitment (i.e., preferential larval, juvenile, and adult attachment to mussel biogenic structure) and its role in the development of power-law spatial patterns observed in Maine, USA, soft-bottom mussel beds. The model demonstrated that recruitment facilitation produces power-law spatial structure similar …
Landings, Vol. 22, No. 12, Maine Lobstermen’S Community Alliance
Landings, Vol. 22, No. 12, Maine Lobstermen’S Community Alliance
Landings: News & Views from Maine's Lobstering Community
Landings content emphasizes science, history, resource sustainability, economic development, and human interest stories related to
Maine’s lobster industry. The newsletter emphasizes lobstering as a traditional, majority-European American lifeway with an economic and social heritage unique to the coast of Maine. The publication focuses how ongoing research to engage in sustainable, non-harmful, and non-wasteful commercial fishing practices benefit both the fishery and Maine's coastal legacy.
Maine Lobstermen’s Community Alliance (MLCA) started publication of Landings, a 24-page newsletter in January 2013 as the successor of the Maine Lobstermen’s Association (MLA) Newsletter. As of 2022, the MLCA published over 6,500 copies of …
Occurrence Of The Oyster Parasite, Haplosporidium Nelsoni, In The Damariscotta River Estuary, Maine, Nicole Messerman
Occurrence Of The Oyster Parasite, Haplosporidium Nelsoni, In The Damariscotta River Estuary, Maine, Nicole Messerman
Electronic Theses and Dissertations
Haplosporidium nelsoni is a protozoan parasite that causes the devastating disease MSX in the Eastern oyster, Crassostrea virginica, along the East coast of the United States. Until recently, H. nelsoni had not reached epizootic levels in Maine. However, in the summer of 2010, H. nelsoni was responsible for significant mortalities in cultivated Eastern oysters in the Damariscotta River Estuary. Since the initial outbreak, surveys performed by the Department of Marine Resources (DMR) show that MSX is still prevalent in the Damariscotta River Estuary. The industry remains concerned about the parasite levels with each new grow out season. In this study, …
There May Not Always Be More Fish In The Sea: Why Noaa’S Restrictions Do Not Violate The Magnuson-Stevens Act, Lindsey Nicolai
There May Not Always Be More Fish In The Sea: Why Noaa’S Restrictions Do Not Violate The Magnuson-Stevens Act, Lindsey Nicolai
William & Mary Environmental Law and Policy Review
No abstract provided.
Examining Predation As A Possible Means Of Controlling Crown-Of- Thorns Starfish (Acanthaster Planci) Outbreaks On Reefs Around Lizard Island, Australia, Amanda Chan
Independent Study Project (ISP) Collection
Since the world’s coral reefs are currently threatened by a variety of different natural and anthropogenic factors, research on protecting coral reefs is pivotal to protect these diverse ecosystems. However, only Indo-Pacific reefs such as the Great Barrier Reef are dying due to a corallivorous echinoderm threat known as the Crown-of-Thorns Starfish (Acanthaster planci). A. planci is a starfish which feeds on coral tissue and can quickly reduce coral cover on a reef during an outbreak. Although scientists are still unsure as to what causes these outbreaks, one suggestion is the predator-removal theory. The predator removal-theory states that major predators …
A Fish Farmer’S Role In Sustainable Aquaculture: An Overview Of Philippine Aquaculture, Janice A. Ragaza, Jonni Fay C. Teves
A Fish Farmer’S Role In Sustainable Aquaculture: An Overview Of Philippine Aquaculture, Janice A. Ragaza, Jonni Fay C. Teves
Biology Faculty Publications
The expansion of Philippine aquaculture is essential to addressing poverty and food insecurity in the midst of a seemingly irreversible decline in national capture fisheries. Concomitant with its rise, however, are compounding environmental problems caused by climate change, lackluster governance and irresponsible farming practices. It is equally important to ensure aquaculture sustainability so that fish demand from a rapidly growing population is continually met and that fish farmers’ socioeconomic well-being is secured. As such, programs have been developed that aim to enjoin the government and private sectors with fishing communities to realize this goal.
Clarification Of The Systematics Of The Haploporoidea (Trematoda) With Descriptions Of New Genera And Species, Michael Jay Andres
Clarification Of The Systematics Of The Haploporoidea (Trematoda) With Descriptions Of New Genera And Species, Michael Jay Andres
Dissertations
The superfamily Haploporoidea Nicoll, 1914 comprises two families, the Atractotrematidae Yamaguti, 1939 and the Haploporidae Nicoll, 1914, and the subfamily Cadenatellinae Gibson et Bray, 1982. All members are parasites of the alimentary tract or gall bladder of marine, estuarine, and freshwater herbivorous fishes. Overstreet and Curran (2005a) provided a review of the Haploporidae and recognized four subfamilies, the Chalcinotrematinae Overstreet et Curran, 2005, Haploporinae Nicoll, 1914, Megasoleninae Manter, 1935, and Waretrematinae Srivastava, 1937. In a series of five publications, Blasco-Costa et al. (2009a-e) revised the Haploporinae and erected a fifth subfamily, the Forticulcitinae Blasco-Costa, Balbuena, Kostadinova, et Olson, 2009. The …
Jellyfish, Forage Fish, And The World's Major Fisheries, Kelly L. Robinson, James J. Ruzicka, Mary Beth Decker, Richard D. Brodeur, Frank J. Hernandez, Javier Quiñones, E. Marcelo Acha, Shin-Ichi Uye, Hermes Mianzan, William M. Graham
Jellyfish, Forage Fish, And The World's Major Fisheries, Kelly L. Robinson, James J. Ruzicka, Mary Beth Decker, Richard D. Brodeur, Frank J. Hernandez, Javier Quiñones, E. Marcelo Acha, Shin-Ichi Uye, Hermes Mianzan, William M. Graham
Faculty Publications
A majority of the world’s largest net-based fisheries target planktivorous forage fish that serve as a critical trophic link between the plankton and upper-level consumers such as large predatory fishes, seabirds, and marine mammals. Because the plankton production that drives forage fish also drives jellyfish production, these taxa often overlap in space, time, and diet in coastal ecosystems. This overlap likely leads to predatory and competitive interactions, as jellyfish are effective predators of fish early life stages and zooplankton. The trophic interplay between these groups is made more complex by the harvest of forage fish, which presumably releases jellyfish from …
Scaling Ecosystem Services To Reef Development : Effects Of Oyster Density On Nitrogen Removal And Reef Community Structure, M. Lisa Kellogg, Jeffrey C. Cornwell, Michael S. Owens, Mark Luckenbach, Paige G. Ross, Thomas A. Leggett, Jennifer C. Dreyer C. Dreyer, Bowdoin Lusk, Alan Birch, Edward Smith
Scaling Ecosystem Services To Reef Development : Effects Of Oyster Density On Nitrogen Removal And Reef Community Structure, M. Lisa Kellogg, Jeffrey C. Cornwell, Michael S. Owens, Mark Luckenbach, Paige G. Ross, Thomas A. Leggett, Jennifer C. Dreyer C. Dreyer, Bowdoin Lusk, Alan Birch, Edward Smith
Reports
Eighteen native oyster experimental reefs (16-m2 each) were restored using six oyster densities (0, 10, 25, 50, 100 and 250 adult oysters m-2) with three replicates of each density at each of two sites: one subtidal site in Onancock Creek, Virginia and one intertidal site in Hillcrest Oyster Sanctuary within The Nature Conservancy’s Virginia Coast Reserve. A science-based monitoring program explored quantitative relationships between structural and functional characteristics of these restored reefs. Structural parameters examined included oyster abundance, oyster size/biomass, surface shell volume, reef topographic complexity and sediment characteristics. Functional parameters included denitrification rates and macrofaunal abundance and biomass. Data …
Variability In The Spatial And Temporal Patterns Of Larval Scombrid Abundance In The Gulf Of Mexico, Sennai Y. Habtes
Variability In The Spatial And Temporal Patterns Of Larval Scombrid Abundance In The Gulf Of Mexico, Sennai Y. Habtes
USF Tampa Graduate Theses and Dissertations
Accurate fishery-independent methods for assessing the abundance of marine fish stocks are important tools for proper pelagic fisheries management. The review and improvement of standardized sampling methods used in fisheries-independent sampling, and the establishment of improved models of abundance and population dynamics utilizing novel statistical techniques for fisheries management will further improve our understanding of the way in which marine fish stocks vary spatially and temporally. One of the most important and longest running surveys of fisheries-independent data in the Southeastern United States is the spring ichthyoplankton survey conducted through the Southeast Area Mapping and Assessment Program (SEAMAP).
These surveys …
Performance Of A Temperate-Zone Channel Catfish Biofloc Technology Production System During Winter, Bartholomew W. Green
Performance Of A Temperate-Zone Channel Catfish Biofloc Technology Production System During Winter, Bartholomew W. Green
United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications
Channel catfish (Ictalurus punctatus) have been grown successfully in an outdoor biofloc technology production system. Outdoor biofloc production systems in the tropic sare operated year-round, whereas the channel catfish studies were conducted only during the growing season and biofloc production tanks were harvested and idled for the winter. If an outdoor biofloc production system is to be adopted by farmers at temperate latitudes, then data gaps related to system and fish performance over the winter must be addressed. The present study was conducted to address these data gaps for channel catfish culture. Waters from a recently completed biofloc …
Evaluation Of Striped Bass Stocks In Virginia, Monitoring And Tagging Studies, 2010-2014 Progress Report, 1 September 2013 - 31 August 2014, Philip W. Sadler, Matthew W. Smith, John M. Hoenig, Robert E. Harris, Lydia M. Goins
Evaluation Of Striped Bass Stocks In Virginia, Monitoring And Tagging Studies, 2010-2014 Progress Report, 1 September 2013 - 31 August 2014, Philip W. Sadler, Matthew W. Smith, John M. Hoenig, Robert E. Harris, Lydia M. Goins
Reports
This report presents the results of striped bass (Morone saxatilis) tagging and monitoring activities in Virginia during the period 1 September 2013 through 31 August 2014. It includes an assessment of the biological characteristics of striped bass taken from the 2014 spring spawning run, estimates of annual survival and fishing mortality based on annual spring tagging, and the results of the study that documents the prevalence of mycobacterial infections of striped bass in Chesapeake Bay. Also included is information on gear selectivity of recreational anglers for striped bass and on impacts of dermal mycobacteriosis on striped bass. The information contained …
Use Of A Towed Camera System For Estimating Reef Fish Populations Densities On The West Florida Shelf, Sarah Elizabeth Grasty
Use Of A Towed Camera System For Estimating Reef Fish Populations Densities On The West Florida Shelf, Sarah Elizabeth Grasty
USF Tampa Graduate Theses and Dissertations
Reef fish species tend to reside over high relief habitat which makes them difficult to sample with traditional gears such as nets and trawls. Therefore, implementing and understanding the strengths and weaknesses of new approaches which incorporate acoustic and optical methods has become a priority for reef fish stock assessment. Beginning in June of 2013, a towed camera system known as the Camera-Based Assessment Survey System (C-BASS) has been used to visualize over 500 kilometers of transect and record more than 80 hours of video over several habitats in the Gulf of Mexico. Surveys have been completed on the West …
Phylogenetic Analysis Of Algal Symbionts Associated With Four North American Amphibian Egg Masses, Eunsoo Kim, Yuan Lin, Ryan R. Kerney, Lili Blumenberg, Cory Bishop
Phylogenetic Analysis Of Algal Symbionts Associated With Four North American Amphibian Egg Masses, Eunsoo Kim, Yuan Lin, Ryan R. Kerney, Lili Blumenberg, Cory Bishop
Biology Faculty Publications
Egg masses of the yellow-spotted salamander Ambystoma maculatum form an association with the green alga “Oophila amblystomatis” (Lambert ex Wille), which, in addition to growing within individual egg capsules, has recently been reported to invade embryonic tissues and cells. The binomial O. amblystomatis refers to the algae that occur in A. maculatum egg capsules, but it is unknown whether this population of symbionts constitutes one or several different algal taxa. Moreover, it is unknown whether egg masses across the geographic range of A. maculatum, or other amphibians, associate with one or multiple algal taxa. To address these …
Shark Bay Prawn Managed Fishery Harvest Strategy : 2014 – 2019 : Version 1.0, Department Of Fisheries
Shark Bay Prawn Managed Fishery Harvest Strategy : 2014 – 2019 : Version 1.0, Department Of Fisheries
Fisheries management papers
No abstract provided.
Shark Bay Prawn Managed Fishery : Bycatch Action Plan : 2014 – 2019 : Version 1.0, Department Of Fisheries
Shark Bay Prawn Managed Fishery : Bycatch Action Plan : 2014 – 2019 : Version 1.0, Department Of Fisheries
Fisheries management papers
No abstract provided.
Species Identification And Phylogeny Of Phycinae Hakes And Related Gadoid Fishes, Laura Ann Whitefleet-Smith
Species Identification And Phylogeny Of Phycinae Hakes And Related Gadoid Fishes, Laura Ann Whitefleet-Smith
All Theses And Dissertations
The term hake refers to a number of species belonging to multiple families of fish in the suborder Gadoidei and includes two main groups: Phycinae hakes (family Gadidae) and Merluccius spp. hakes (family Merlucciidae). The use of the common name hake for this diverse group of fish prompts questions such as: how are these species related and how can they be differentiated? Chapter one details the development of the Rapid Gadoid Identification Assay (RaGIA) for molecular identification of 11 gadoid fishes (including six hakes) using Polymerase Chain Reaction Restriction Fragment Length Polymorphism (PCR-RFLP). RaGIA was used for species identification of …
Assessing The Ecological Impact Of The Western Rock Lobster Fishery In Fished And Unfished Areas Final Frdc Report – Project 2008/013, Lynda B. Bellchambers, Matthew B. Pember
Assessing The Ecological Impact Of The Western Rock Lobster Fishery In Fished And Unfished Areas Final Frdc Report – Project 2008/013, Lynda B. Bellchambers, Matthew B. Pember
Fisheries research reports
This project, in consultation with an industry working group, has been instrumental in establishing a closed area in the western rock lobster fishery to assess the potential ecosystem effects of removing lobster biomass from deep water (40-100 m). The major outcome of this research is an improved understanding of the ecosystem that supports the western rock lobster. These types of information for improve the Department of Fisheries’ ability to manage the fishery in an ecosystem based manner and provide scientifically defensible data to more precisely assess the level of risk of the fishery to deep water communities. In early 2013, …
Landings, Vol. 22, No. 11, Maine Lobstermen’S Community Alliance
Landings, Vol. 22, No. 11, Maine Lobstermen’S Community Alliance
Landings: News & Views from Maine's Lobstering Community
Landings content emphasizes science, history, resource sustainability, economic development, and human interest stories related to
Maine’s lobster industry. The newsletter emphasizes lobstering as a traditional, majority-European American lifeway with an economic and social heritage unique to the coast of Maine. The publication focuses how ongoing research to engage in sustainable, non-harmful, and non-wasteful commercial fishing practices benefit both the fishery and Maine's coastal legacy.
Maine Lobstermen’s Community Alliance (MLCA) started publication of Landings, a 24-page newsletter in January 2013 as the successor of the Maine Lobstermen’s Association (MLA) Newsletter. As of 2022, the MLCA published over 6,500 copies of …
Hydrolyzed Tuna Meat By-Product Supplement For Juvenile Red Sea Bream, Pagrus Major, And Its Effect On Growth, Enzyme Activity, Plasma Parameters, And Apparent Nutrient Digestibility, Janice A. Ragaza, Roger Edward P. Mamauag, Shunsuke Koshio, Manabu Ishikawa, Saichiro Yokoyama
Hydrolyzed Tuna Meat By-Product Supplement For Juvenile Red Sea Bream, Pagrus Major, And Its Effect On Growth, Enzyme Activity, Plasma Parameters, And Apparent Nutrient Digestibility, Janice A. Ragaza, Roger Edward P. Mamauag, Shunsuke Koshio, Manabu Ishikawa, Saichiro Yokoyama
Biology Faculty Publications
A growth experiment was conducted on juvenile red sea bream, Pagrus major to investigate the effect of the inclusion in fish diets, of tuna meat by-product hydrolysate which was processed through enzymatic hydrolysis using a commercially available enzyme, derived from Bacillus subtilis. Six experimental diets were formulated in the experiment. Three diets contained 50, 150 and 250 g/kg of TPM-H (tuna meat by-product hydrolysate), and two diets with the unprocessed TPM (tuna meat by-product) at an inclusion level of 50 and 250 g/kg. A control diet was formulated without any addition of the test ingredients. Treatment diets were fed ad …
Spatiotemporal Variation In Flow-Dependent Recruitment Of Long-Lived Riverine Fish: Model Development And Evaluation, Daisuke Goto, Martin J. Hamel, Jeremy J. Hammen, Mathew L. Rugg, Mark A. Pegg, Valery E. Forbes
Spatiotemporal Variation In Flow-Dependent Recruitment Of Long-Lived Riverine Fish: Model Development And Evaluation, Daisuke Goto, Martin J. Hamel, Jeremy J. Hammen, Mathew L. Rugg, Mark A. Pegg, Valery E. Forbes
School of Biological Sciences: Faculty Publications
Abstract Natural flow regimes can play a major role as an overarching ecosystem driver in reproduction and recruitment of riverine fishes. Human needs for freshwater however have altered hydrology of many riverine systems worldwide, threatening fish population sustainability. To understand and predict how spatiotemporal dynamics of flow regimes influence reproductive and recruitment variability, and ultimately population sustainability of shovelnose sturgeon (Scaphirhynchus platorynchus), we develop a spatially explicit (1D) individual-based population model that mechanistically (via energetics-based processes) simulates daily activities (dispersal, spawning, foraging, growth, and survival). With field observations of sturgeon and habitat conditions in a major tributary of …
The Status Of Fishes In The Missouri River, Nebraska: Lake Sturgeon (Acipenser Fulvescens), Kirk D. Steffensen, Sam Stukel, Dane A. Shuman
The Status Of Fishes In The Missouri River, Nebraska: Lake Sturgeon (Acipenser Fulvescens), Kirk D. Steffensen, Sam Stukel, Dane A. Shuman
Transactions of the Nebraska Academy of Sciences and Affiliated Societies
Lake Sturgeon (Acipenser fulvescens) occurrences in the Missouri River along Nebraska’s eastern border are historically sporadic and rare. Presently, the wild Lake Sturgeon population in this river reach may be extirpated. A Recovery Program initiated by the Missouri Department of Conservation (MDC) has stocked almost 150,000 hatchery-reared Lake Sturgeon into the lower Missouri River at several sites in Missouri. As a result, the number of Lake Sturgeon collected has increased. Since monitoring began in 2003, no Lake Sturgeon have been collected above Gavins Point Dam while 40 fish were collected downstream of Gavins Point Dam. The majority of …