Open Access. Powered by Scholars. Published by Universities.®

Life Sciences Commons

Open Access. Powered by Scholars. Published by Universities.®

Reports

Discipline
Institution
Keyword
Publication Year

Articles 1 - 30 of 1483

Full-Text Articles in Life Sciences

Age Structure And Growth Rate In The Sea Scallop Placopecten Magellanicus, Roger Mann, David Rudders May 2019

Age Structure And Growth Rate In The Sea Scallop Placopecten Magellanicus, Roger Mann, David Rudders

Reports

The overall project objective is to describe age structure and growth of scallops from the Georges Bank and Mid-Atlantic regions. There are three component objectives; (1) age structure and growth during the 1977- 1999 period using archived material stored at NEFSC Woods Hole; (2) age structure and growth of scallops collected over the latitudinal and bathymetric range of the US commercial fishery in 2012 and 2013 (material archived at VIMS from RSA studies); and (3) age structure and growth of scallops collected in 2017 assessment surveys by co-PI Rudders.


Virginia Game Fish Tagging Program Annual Report 2018, Susanna Musick, Lewis Gillingham May 2019

Virginia Game Fish Tagging Program Annual Report 2018, Susanna Musick, Lewis Gillingham

Reports

Through 2018, the Virginia Game Fish Tagging Program (VGFTP) has maintained a 23-year database of records for tagged and recaptured fish. The program is a cooperative project of the Virginia Saltwater Fishing Tournament (VSFT) under the Virginia Marine Resources Commission-(VMRC) and the Virginia Institute of Marine Science (VIMS) of the College of William and Mary (under the VIMS Marine Advisory Program).


Annual Report - 2018 Data Collection And Analysis In Support Of Single And Multispecies Stock Assessments In Chesapeake Bay: The Chesapeake Bay Multispecies Monitoring And Assessment Program., Christopher F. Bonzek, James Gartland, Debra J. Gauthier, Robert J. Latour May 2019

Annual Report - 2018 Data Collection And Analysis In Support Of Single And Multispecies Stock Assessments In Chesapeake Bay: The Chesapeake Bay Multispecies Monitoring And Assessment Program., Christopher F. Bonzek, James Gartland, Debra J. Gauthier, Robert J. Latour

Reports

Historically, fisheries management has been based on the results of single‐species stock assessment models that focus on the interplay between exploitation level and sustainability. There currently exists a suite of standard and accepted analytical frameworks (e.g., virtual population analysis (VPA), biomass dynamic production modeling, delay difference models, etc.) for assessing the stocks, projecting future stock size, evaluating recovery schedules and rebuilding strategies for overfished stocks, setting allowable catches, and estimating fishing mortality or exploitation rates. A variety of methods also exist to integrate the biological system and the fisheries resource system, thereby enabling the evaluation of alternative management ...


Monitoring The Abundance Of American Shad And River Herring In Virginia's Rivers - 2018 Annual Report, Eric J. Hilton, Robert Latour, Patrick E. Mcgrath, Brian Watkins, Ashleigh Magee Apr 2019

Monitoring The Abundance Of American Shad And River Herring In Virginia's Rivers - 2018 Annual Report, Eric J. Hilton, Robert Latour, Patrick E. Mcgrath, Brian Watkins, Ashleigh Magee

Reports

This report describes the results of the twenty-first year of a continuing study to estimate the relative abundance and assess the status of American shad (Alosa sapidissima) stocks in Virginia by monitoring the spawning runs in the James, York and Rappahannock rivers in spring 2018, evaluating hatchery programs, and contributing to coast-wide assessments (ASMFC 2007). We also report on two fishery-independent monitoring programs using anchor gillnets in the Rappahannock River (year 1) and the Chickahominy River (year 4; a major tributary of the James River), to determine relative abundance and stock structure for the adult spawning run of river herring ...


The Status Of Virginia’S Public Oyster Resource 2018, Melissa Southworth, Roger L. Mann Apr 2019

The Status Of Virginia’S Public Oyster Resource 2018, Melissa Southworth, Roger L. Mann

Reports

The Virginia Institute of Marine Science (VIMS) monitors recruitment of the Eastern oyster, Crassostrea virginica (Gmelin, 1791), annually from late spring through early fall, by deploying spatfall (settlement of larval oysters called spat) collectors (shellstrings) at various sites in three Virginia western Chesapeake Bay tributaries. The survey provides an estimate of a particular area’s potential for receiving a "strike" or settlement (set) of oysters on the bottom and helps describe the timing of settlement events in a given year. Information obtained from this monitoring effort provides an overview of long-term recruitment trends in the lower Chesapeake Bay and contributes ...


Virginia Shark Identification Guide, Multispecies Research Group, Virginia Institute Of Marine Science Apr 2019

Virginia Shark Identification Guide, Multispecies Research Group, Virginia Institute Of Marine Science

Reports

Table of Contents:

Atlantic Sharpnose Shark | Bigeye Thresher Shark | Bignose Shark | Blacknose Shark | Blacktip Shark | Blue Shark | Bluntnose Sixgill Shark | Bonnethead Bull Shark | Dusky Shark | Finetooth Shark | Great Hammerhead Shark | Great White Shark | Gulper Shark | Lemon Shark | Longfin Mako Shark | Night Shark | Oceanic Whitetip Shark | Porbeagle | Sandbar Shark | Sand Tiger Shark | Scalloped Hammerhead Shark | Sharpnose Sevengill Shark | Shortfin Mako Shark | Silky Shark | Smooth Dogfish | Smooth Hammerhead Shark | Spinner Shark | Spiny Dogfish | Thresher Shark | Tiger Shark


Estimating Relative Abundance Of Young-Of-The-Year American Eel, Anguilla Rostrata, In The Virginia Tributaries Of Chesapeake Bay, Spring 2018, Troy D. Tuckey, Mary C. Fabrizio Mar 2019

Estimating Relative Abundance Of Young-Of-The-Year American Eel, Anguilla Rostrata, In The Virginia Tributaries Of Chesapeake Bay, Spring 2018, Troy D. Tuckey, Mary C. Fabrizio

Reports

American Eel (Anguilla rostrata) is a valuable commercial species along the Atlantic coast of North America from New Brunswick to Florida. In the U.S., harvests have declined, with similar patterns occurring in the Canadian Maritime Provinces (Meister and Flagg 1997). An average of 62% of the annual landings of U.S. commercial harvest since 1993 have come from the Chesapeake Bay (personal communication from the National Marine Fisheries Service, Fisheries Statistics Division, 9 February 2015). In 2013, Virginia commercial landings were approximately 100,298 lbs; since mandatory reporting began in 1993, average annual landings in Virginia have been 193 ...


Air Quality Modelling For Ireland, Aoife Donnelly, Bruce Misstear, Brian Broderick Mar 2019

Air Quality Modelling For Ireland, Aoife Donnelly, Bruce Misstear, Brian Broderick

Reports

Air pollution is the primary environmental cause of premature death in the EU (European Commission, 2013) and the most problematic pollutants across Europe have consistently been oxides of nitrogen (e.g. nitrogen dioxide (NO2)), particulate matter (e.g. PM10, PM2.5) and ozone (O3). While measurements form an important aspect of air quality assessment, on their own they are unlikely to be sufficient to provide an accurate spatial and temporal description of the pollutant concentrations for exposure assessment and moreover they cannot provide information regarding future air quality. Annex XVI of 2008/50/EC requires member ...


Virginia Fishery Resource Grant Program 2018, Virginia Fishery Resource Grant Program, Virginia Institute Of Marine Science Feb 2019

Virginia Fishery Resource Grant Program 2018, Virginia Fishery Resource Grant Program, Virginia Institute Of Marine Science

Reports

No abstract provided.


Mud's Journey Through The Watershed Subjects: Earth Science / Environmental Science Grades: 9-12, Jessie Turner Jan 2019

Mud's Journey Through The Watershed Subjects: Earth Science / Environmental Science Grades: 9-12, Jessie Turner

Reports

Expedition Sediments is a game-in-a-lesson that allows students to explore the movement of sediments through watersheds by moving around the classroom. This lesson explores how grains of estuarine mud and sand move throughout estuaries and coastal regions, with a focus on processes surrounding a highly populated estuary such as the Chesapeake Bay. By the end of the lesson, students will be able to explain how sediments are transported through an estuary, graph sediment residence times in different locations, and compare the timescales of different sediment transport processes.


Prismatic Little Plankton Subjects: Life Sciences, Physical Science/Chemistry; Marine/Ocean Science - Grades: 9-12, Kristen Sharpe Jan 2019

Prismatic Little Plankton Subjects: Life Sciences, Physical Science/Chemistry; Marine/Ocean Science - Grades: 9-12, Kristen Sharpe

Reports

This is a hands-on interdisciplinary activity that incorporates the fun of biology into physics!

Students participate in chromatography experiments to investigate the properties of plant pigments found in various fruits and vegetables, representing pigments commonly found in various species of marine phytoplankton. The students then apply what they've learned to create and analyze a chromatogram of a mystery "algal" sample to determine which species of phytoplankton are in the sample based on the pigments present. This activity simulates phytoplankton community analysis research done using High Performance Liquid Chromatography at VIMS.


One Fish, Two Fish, Red Fish, Whose Fish? Subjects: Life Science, Environmental Science, Marine / Ocean Science, Shelby White Jan 2019

One Fish, Two Fish, Red Fish, Whose Fish? Subjects: Life Science, Environmental Science, Marine / Ocean Science, Shelby White

Reports

This activity invites students to assume the role of various stakeholders in fisheries management and actively discuss the influence of economics, ecology and human interactions in decision-making.

Students will demonstrate their argument for/against a certain regulation by participating as a specific stakeholder (i.e. commercial fisher, recreational fisher, scientists/researcher, environmental group, management agency, and citizen). Students will recognize that stakeholders tend to advocate based on their individual needs, often making it difficult for proposed policies to satisfy the needs of all stakeholders and achieve sustainability goals.


Trawling Through The Five Gyres: A Microplastic Research Study Subjects: Life Science, Earth Science, Marine/Ocean Science - Grade 6, Meredith Seeley Jan 2019

Trawling Through The Five Gyres: A Microplastic Research Study Subjects: Life Science, Earth Science, Marine/Ocean Science - Grade 6, Meredith Seeley

Reports

This activity challenges students to help researchers understand what types of plastics are polluting the oceans!

Teachers will prepare samples of microplastics that were collected in each of the 5 ocean gyres, mimicking plastic concentrations actually found in the oceans! Working as a group, students will count the items of plastic and graph their results. They will share their results with the class to compare their gyre to the other four gyres. Finally, students will understand the link between ocean microplastic pollution, and our use of single-use plastics.

This activity can be completed in 45 minutes in the class. An ...


Estimation Of Juvenile Striped Bass Relative Abundance In The Virginia Portion Of Chesapeake Bay. Annual Progress Report: 2018-2019, Brian K. Gallagher, Mary C. Fabrizio, Troy D. Tuckey Jan 2019

Estimation Of Juvenile Striped Bass Relative Abundance In The Virginia Portion Of Chesapeake Bay. Annual Progress Report: 2018-2019, Brian K. Gallagher, Mary C. Fabrizio, Troy D. Tuckey

Reports

The 2018 Striped Bass juvenile abundance index was 10.72 and was not significantly different than the reference mean of 7.77 from 1980-2009. Abundance indices in the James and York river systems in 2018 were average compared to their individual reference means (1980-2009), whereas abundance was above average in the Rappahannock River. Relatively high catches of young‐of‐the‐year Striped Bass at downriver sites in 2018 suggested Striped Bass were displaced downstream of their typical core nursery areas, likely due to high volumes of freshwater discharge and low salinities before and during the sampling period. Juvenile White Perch ...


Wolffish: A Tale Of Missing Teeth Subjects: Life Science, Biology, Marine/Ocean Science - Grades: 6-8, Kate Bemis Jan 2019

Wolffish: A Tale Of Missing Teeth Subjects: Life Science, Biology, Marine/Ocean Science - Grades: 6-8, Kate Bemis

Reports

This lesson plan asks students to make observations based on photographs of real specimens from a natural history collection.

Students collect data to make graphs, which allow them to compare trends for how different variables impact the ecology of Atlantic Wolffish.


Sequence Csi: The Nitrogen Cycle Subjects: Life Science, Environmental Science, Marine/Ocean Science - Grades: 9-12, Stephanie Wilson Jan 2019

Sequence Csi: The Nitrogen Cycle Subjects: Life Science, Environmental Science, Marine/Ocean Science - Grades: 9-12, Stephanie Wilson

Reports

This lesson invites students to work together to identify a mystery DNA sample using state of the art biotechnology.

After identifying the organism, they can work with another group of students to hypothesize about how the different organisms are related to one another. Students will learn that the samples are connected through the nitrogen cycle! This gives students an introduction to scientific molecular techniques and environmental nitrogen cycling.


Leds To Replace Fluorescent Tubes For Growth Of Cultured Algae, Grace Alego, Christopher Bentley, Rebecca Smith, Darian Kelley, Richard Synder Dec 2018

Leds To Replace Fluorescent Tubes For Growth Of Cultured Algae, Grace Alego, Christopher Bentley, Rebecca Smith, Darian Kelley, Richard Synder

Reports

Fluorescent bulbs are widely used for algal culture stocks and production in aquaculture operations. Metal halide lamps are also used for production tanks with significant electricity demand and heat production. LED technology promises lower operational costs with less energy waste as heat for equivalent light energy production. Re-tooling algal production facilities with new LED fixtures incurs significant expense that must be recaptured in savings over time. The initial cost, added to concerns over the unknown response of algae to LED light sources may both be factors inhibiting incorporation of this new technology. LED replacement tubes are available to retrofit fluorescent ...


Expanding Instream Flows To Protect Ecosystems In Overallocated River Basins, Belize A. Lane, David E. Rosenberg Oct 2018

Expanding Instream Flows To Protect Ecosystems In Overallocated River Basins, Belize A. Lane, David E. Rosenberg

Reports

Utahns are expressing a rapidly growing interest in protecting and enhancing instream flows for outdoor recreation and environmental benefits (Endter-Wada et al. 2015). However, many Utah rivers are already over-allocated for agricultural, municipal, hydropower and other water uses, making it difficult to procure additional water for instream flows. ‘Use it or lose it’ western water law and mentality encourages Utahns to use water rather than return it to rivers and ecosystems.

This briefing reviews existing instream flow practices allowed by the Utah water rights system and the challenges to implementation. We suggest key technical and legislative opportunities within and outside ...


2018 Annual Report Estimating Relative Juvenile Abundance Of Ecologically Important Finfish In The Virginia Portion Of Chesapeake Bay (1 July 2017 – 30 June 2018), Troy D. Tuckey, Mary C. Fabrizio Sep 2018

2018 Annual Report Estimating Relative Juvenile Abundance Of Ecologically Important Finfish In The Virginia Portion Of Chesapeake Bay (1 July 2017 – 30 June 2018), Troy D. Tuckey, Mary C. Fabrizio

Reports

EXECUTIVE SUMMARY

1 July 2017 – 30 June 2018

The Trawl Survey provides crucial data to state, regional, and national fisheries management agencies, including the Virginia Marine Resources Commission (VMRC), the Atlantic States Marine Fisheries Commission (ASMFC), the Mid-Atlantic Fisheries Management Council (MAFMC), and the National Marine Fisheries Service (NMFS). The MAFMC recognizes the juvenile trawl survey as one of the key predictors of Summer Flounder recruitment. Annual indices of juvenile abundance have been generated from trawl survey data for species of key recreational, ecological, and commercial importance in the Virginia portion of Chesapeake Bay. These include Spot, Atlantic Croaker, Weakfish ...


Evaluating Recruitment Of American Eel, Anguilla Rostrata, In The Potomac River (Spring 2018), Troy D. Tuckey, Mary C. Fabrizio Sep 2018

Evaluating Recruitment Of American Eel, Anguilla Rostrata, In The Potomac River (Spring 2018), Troy D. Tuckey, Mary C. Fabrizio

Reports

No abstract provided.


Virginia Shellfish Aquaculture Situation And Outlook Report: Results Of The 2017 Virginia Shellfish Aquaculture Crop Reporting Survey, Karen Hudson, Virginia Sea Grant Marine Advisory Program Jul 2018

Virginia Shellfish Aquaculture Situation And Outlook Report: Results Of The 2017 Virginia Shellfish Aquaculture Crop Reporting Survey, Karen Hudson, Virginia Sea Grant Marine Advisory Program

Reports

No abstract provided.


An Updated Model For Estimating The Tmdl-Related Benefits Of Oyster Reef Restoration Harris Creek, Maryland, Usa, M. Lisa Kellogg, Mark J. Brush, Jeff C. Cornell Jun 2018

An Updated Model For Estimating The Tmdl-Related Benefits Of Oyster Reef Restoration Harris Creek, Maryland, Usa, M. Lisa Kellogg, Mark J. Brush, Jeff C. Cornell

Reports

In 2014, a user-friendly, web-accessible model was developed that allowed restoration practitioners and resource managers to easily estimate the TMDLrelated benefits of oyster reef (Crassostrea virginica) restoration per unit area, run restoration scenarios in Harris Creek, MD to optimize restoration planning and implementation, and calculate the benefits of the chosen plan. The model was rooted in scientifically defensible data and was readily transferrable to systems throughout the Chesapeake Bay and Eastern Shore. The model operated in five vertically well-mixed boxes along the main axis of the creek. Exchanges among creeks were computed using a tidal prism approach and were compared ...


Environmental And Ecological Benefits And Impacts Of Oyster Aquaculture Chesapeake Bay, Virginia, Usa, M. Lisa Kellogg, Jessica Turner, Jennifer Dreyer, Grace M. Massey Jun 2018

Environmental And Ecological Benefits And Impacts Of Oyster Aquaculture Chesapeake Bay, Virginia, Usa, M. Lisa Kellogg, Jessica Turner, Jennifer Dreyer, Grace M. Massey

Reports

To better quantify the ecological benefits and impacts of oyster aquaculture, we sampled water quality, sediment quality, benthic macrofaunal communities and oysters at four oyster aquaculture sites located on the western shore of Chesapeake Bay in Virginia, USA. At each site, we collected samples from within the footprint of the aquaculture cages and from nearby areas with similar physical and environmental conditions but far enough away to be minimally influenced by aquaculture operations. Data collected from the water column included chlorophyll concentrations, turbidity, pH, dissolved oxygen concentrations, light attenuation, particle concentration, median particle size, total suspended solids and their organic ...


A Cooperative High Precision Dredge Survey To Assess The Mid-Atlantic Sea Scallop Resource : Final Report, David Rudders, Sally Roman May 2018

A Cooperative High Precision Dredge Survey To Assess The Mid-Atlantic Sea Scallop Resource : Final Report, David Rudders, Sally Roman

Reports

For the sea scallop, Placopecten magellanicus, the concepts of space and time have emerged as the basis of an effective management tool. The strategy of closing or limiting activities in certain areas for specific lengths of time has gained support as a method to conserve and enhance the scallop resource. In the last decade, rotational area management has provided a mechanism to protect juvenile scallops from fishing mortality by closing areas based upon scallop abundance and age distribution. Approximately half of the sea scallop industry’s current annual landings come from areas under this rotational harvest strategy. While this represents ...


An Assessment Of Sea Scallop Abundance And Distribution In The Nantucket Lightship Closed Area And Surrounds: Final Report, David Rudders, Sally Roman May 2018

An Assessment Of Sea Scallop Abundance And Distribution In The Nantucket Lightship Closed Area And Surrounds: Final Report, David Rudders, Sally Roman

Reports

For the sea scallop, Placopecten magellanicus, the concepts of space and time have emerged as the basis of an effective management tool. The strategy of closing or limiting activities in certain areas for specific lengths of time has gained support as a method to conserve and enhance the scallop resource. In the last decade, rotational area management has provided a mechanism to protect juvenile scallops from fishing mortality by closing areas based upon scallop abundance and age distribution. Approximately half of the sea scallop industry’s current annual landings come from areas under this rotational harvest strategy. While this represents ...


An Assessment Of Sea Scallop Abundance And Distribution In Georges Bank Closed Area Ii And The Southern Extension Closure: Final Report, David Rudders, Sally Roman May 2018

An Assessment Of Sea Scallop Abundance And Distribution In Georges Bank Closed Area Ii And The Southern Extension Closure: Final Report, David Rudders, Sally Roman

Reports

For the sea scallop, Placopecten magellanicus, the concepts of space and time have emerged as the basis of an effective management tool. The strategy of closing or limiting activities in certain areas for specific lengths of time has gained support as a method to conserve and enhance the scallop resource. In the last decade, rotational area management has provided a mechanism to protect juvenile scallops from fishing mortality by closing areas based upon scallop abundance and age distribution. Approximately half of the sea scallop industry’s current annual landings come from areas under this rotational harvest strategy. While this represents ...


Virginia Game Fish Tagging Program Annual Report 2017, Susanna Musick, Lewis Gillingham May 2018

Virginia Game Fish Tagging Program Annual Report 2017, Susanna Musick, Lewis Gillingham

Reports

Through 2017, the Virginia Game Fish Tagging Program (VGFTP) has maintained a 22-year database of records for tagged and recaptured fish. The program is a cooperative project of the Virginia Saltwater Fishing Tournament (VSFT) under the Virginia Marine Resources Commission-(VMRC) and the Virginia Institute of Marine Science (VIMS) of the College of William and Mary (under the VIMS Marine Advisory Program).


An Assessment Of Sea Scallop Abundance And Distribution In Georges Bank Closed Area Ii And Surrounds : Final Report, David Rudders, Sally Roman May 2018

An Assessment Of Sea Scallop Abundance And Distribution In Georges Bank Closed Area Ii And Surrounds : Final Report, David Rudders, Sally Roman

Reports

For the sea scallop, Placopecten magellanicus, the concepts of space and time have emerged as the basis of an effective management tool. The strategy of closing or limiting activities in certain areas for specific lengths of time has gained support as a method to conserve and enhance the scallop resource. In the last decade, rotational area management has provided a mechanism to protect juvenile scallops from fishing mortality by closing areas based upon scallop abundance and age distribution. Approximately half of the sea scallop industry’s current annual landings come from areas under this rotational harvest strategy. While this represents ...


Monitoring The Abundance Of American Shad And River Herring In Virginia's Rivers - 2017 Annual Report, Eric J. Hilton, Rob Latour, Patrick E. Mcgrath, Brian Watkins, Ashleigh Magee Apr 2018

Monitoring The Abundance Of American Shad And River Herring In Virginia's Rivers - 2017 Annual Report, Eric J. Hilton, Rob Latour, Patrick E. Mcgrath, Brian Watkins, Ashleigh Magee

Reports

This report describes the results of the twentieth year of a continuing study to estimate the relative abundance and assess the status of American shad (Alosa sapidissima) stocks in Virginia by monitoring the spawning runs in the James, York and Rappahannock rivers in spring 2017, evaluating hatchery programs, and contributing to coast-wide assessments (ASMFC 2007). We also report on two fishery-independent monitoring programs, one using staked gillnets in the Rappahannock River (year 2) and the other using anchor gillnets in the Chickahominy River (year 3; a major tributary of the James River),to determine relative abundance and stock structure for ...


The Status Of Virginia’S Public Oyster Resource 2017, Melissa Southworth, Roger L. Mann Apr 2018

The Status Of Virginia’S Public Oyster Resource 2017, Melissa Southworth, Roger L. Mann

Reports

This report summarizes data collected during 2017 in the Virginia portion of the Chesapeake Bay. The report is composed of two parts, part one, oyster recruitment (shell string) in Virginia and part two, dredge survey of selected oyster bars in Virginia