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  • 1
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    University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory | Solomons, MD
    In:  http://aquaticcommons.org/id/eprint/12395 | 130 | 2014-02-10 02:30:32 | 12395 | University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory
    Publication Date: 2021-06-30
    Description: This workshop was convened to begin building a foundation of understanding for developing and evaluating proposed measures for the rational management of the blue crab fishery in Chesapeake Bay. Our goal was to generate a summary of knowledge of blue crab stock dynamics. Specifically, we intended to address, and hoped to estimate, the basic parameters of an exploited stock - growth, mortality, natality, migration rates, sex ratios and abundance. In one sense these objectives were simply a means for organizing our discussions. A second objective was to compile at the workshop pertinent data held by the major research institutions on Chesapeake Bay so all participants could see the kinds and extent of existing data. As with many stock assessment problems, tailoring an estimating procedure around known existing data can be more productive than deciding on a procedure and then trying to find the required data in someone else's files.Authors of papers contributed to the report: B.S. Hester and P.R. Mundy (p. 50); Qisheng Tang (p. 86); L. Eugene Cronin (p. 111); J.R. McConaugha (p. 128); Cluney Stagg and Phil Jones (p. 153).
    Description: Chesapeake Bay Commission
    Description: University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory
    Description: Editorial Series #ES-01-83, Center for Environmental and Estuarine Studies of the University of Maryland
    Keywords: Conservation ; Ecology ; Fisheries ; Management ; Planning ; Policies
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 168
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  • 2
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    University of Maryland Center for Environmental Science, Chesapeake Biological Laboratory | Solomons, MD
    In:  http://aquaticcommons.org/id/eprint/4861 | 130 | 2011-09-29 15:47:49 | 4861 | University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory
    Publication Date: 2021-07-06
    Description: The possible ecological effects of suspended sediments are manifold. Briefly, suspended sediments may cause an increased surface for microorganism growth, fewer temperature fluctuations, chemical adsorption orabsorption, blanketing, mechanical-abrasive actions, and light penetration reduction (Cairns, 1968). Sherk and Cronin (1970) have pointed out that the above effects have been little studied in the estuarine environment. The ecological effects of suspended sediments on fish eggs and larvae may be of prime importance t o the C and D Canal area, an important spawning and primary nursery area for a variety of estuary: e species (Johnson,1972). This section discusses the effects of suspended sediment on the eggs and larvae of striped bass and white perch.
    Description: Army Corps of Engineers, Philadelphia District
    Keywords: Conservation ; Ecology ; Engineering ; Fisheries ; Chesapeake ; Canal ; Natural Resources Institute ; Striped Bass ; White Perch ; Delaware
    Repository Name: AquaDocs
    Type: monograph
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  • 3
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    University of Maryland Center for Environmental Science, Chesapeake Biological Laboratory | Solomons, MD
    In:  http://aquaticcommons.org/id/eprint/4860 | 130 | 2011-09-29 15:47:58 | 4860 | University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory
    Publication Date: 2021-07-06
    Description: In this report we develop age-length keys and derive age-frequency data. We estimate striped bass and white perch mortality and growth rates, based on the otolith-aging analysis. We also report on hatch-date frequencies of striped bass and white perch larvae, and we discuss environmental effects on recruitment potential.
    Description: Maryland Department of Natural Resources, Tidewater Administration
    Description: Contract No. F112-87-008
    Keywords: Aquaculture ; Conservation ; Ecology ; Environment ; Fisheries ; Management
    Repository Name: AquaDocs
    Type: monograph
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  • 4
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    University of Maryland Center for Environmental Science | Solomons, MD
    In:  http://aquaticcommons.org/id/eprint/6719 | 130 | 2011-11-15 12:19:43 | 6719 | University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory
    Publication Date: 2021-06-26
    Description: Contemporary striped bass population modeling efforts on coastal stocks point to a reduced population fecundity in Chesapeake Bay being partially responsible for declining reproduction (Anonymous 1985; Boreman and Goodyear 1984). Fecundity values used in these models were based on earlier work by jackson and tiller (1952), lewis and Bonner (1966), Hollis (1967) and Holland and Yelverton (1973). An important feature to the Boreman and Goodyear (1985) model (FSIM) is an accurate determination of the fecundity weight regression equation used to determine the rate of egg deposition over time. Egg deposition models in turn can be used to determine how reproductive potential is changing over time in response to various management actions, i.e. reducing fishing mortality rates. thus it is imperative to follow population stock structure in the Bay system and to develop a contemporary fecundity relationship for striped bass. This report deals with the gonadal material collected in 1986 and 1987 from a coordinated Maryland field program. Samples were obtained from drift gill net collections during the spawning season from four localities: Potomac Estuary, Upper Bay, Chesapeake and Delaware Canal, and the Choptank Estuary (Figure 1).
    Description: Maryland Department of Natural Resources, Tidewater Administration
    Keywords: Conservation ; Ecology ; Fisheries ; Management ; Chesapeake Bay ; Choptank ; Potomac ; fecundity ; gill net ; managment ; model ; striped bass ; gut contents ; otoliths ; aging ; ovary ; gonadal tissue ; eggs
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 26
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  • 5
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    Chesapeake Biological Laboratory | Solomons, MD
    In:  librarian@cbl.umces.edu | http://aquaticcommons.org/id/eprint/11224 | 130 | 2021-02-27 20:39:49 | 11224 | University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory
    Publication Date: 2021-06-29
    Description: A review of the relative productivity and value of the shad fisheries of North America as reflected in recorded commercial catches. A review of reasons for the decline that are biological and socioeconomic. Factors that have been held responsible are: pollution; destruction or impairment of spawning and nursery areas; overfishing; hydroelectric and canal dams; natural fluctuations in abundance. Natural catastrophes, parasites, and predators are not considered important in causing the decrease in commercial production. Attempts to rehabilitate the fisheries by various means of stocking artificially-reared fry and pond-reared fingerling shad, appear to have failed in every instance. Introduction of shad fry on the Pacific Coast has resulted in a major fishery. The most significant program is a controlled catch management plan, operating at this time [1953] only in Maryland.
    Keywords: Aquaculture ; Conservation ; Ecology ; Environment ; Fisheries
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 293
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  • 6
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    Alliance for Coastal Technologies | Solomons, MD
    In:  http://aquaticcommons.org/id/eprint/3112 | 130 | 2011-09-29 17:51:50 | 3112 | University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory
    Publication Date: 2021-07-01
    Description: The ACT workshop "Enabling Sensor Interoperability" addressed the need for protocols at thehardware, firmware, and higher levels in order to attain instrument interoperability within and betweenocean observing systems. For the purpose of the workshop, participants spoke in tern of "instruments" rather than "sensors," defining an instrument as a device that contains one or more sensors or actuators and can convert signals from analog to digital.An increase in the abundance, variety, and complexity of instruments and observing systems suggeststhat effective standards would greatly improve "plug-and-work" capabilities. However, there are few standards or standards bodies that currently address instrument interoperability and configuration.Instrument interoperability issues span the length and breadth of these systems, from the measurementto the end user, including middleware services. There are three major components of instrumentinteroperability including physical, communication, and application/control layers. Participantsidentified the essential issues, current obstacles, and enabling technologies and standards,then came up with a series of short and long term solutions.The top three recommended actions, deemed achievable within 6 months of the release of thisreport are:A list of recommendations for enabling instrument interoperability should be put togetherand distributed to instrument developers.A recommendation for funding sources to achieve instrument interoperability should bedrafted. Funding should be provided (for example through NOPP or an IOOS request forproposals) to develop and demonstrate instrument interoperability technologies involvinginstrument manufacturers, observing system operators, and cyberinfrastructure groups.Program managers should be identified and made to understand that milestones for achievinginstrument interoperability include a) selection of a methodology for uniquely identifyingan instrument, b) development of a common protocol for automatic instrumentdiscovery, c) agreement on uniform methods for measurements, d) enablement of end usercontrolled power cycling, and e) implementation of a registry component for IDS and attributes.The top three recommended actions, deemed achievable within S years of the release of this reportare:An ocean observing interoperability standards body should be established that addresses standards for a) metadata, b) commands, c) protocols, d) processes, e) exclusivity, and f)naming authorities.[PDF contains 48 pages]
    Description: NOAA
    Description: Alliance for Coastal Technologies, CBL/UMCES
    Keywords: Engineering ; Environment
    Repository Name: AquaDocs
    Type: monograph
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  • 7
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    Alliance for Coastal Technologies | Solomons, MD
    In:  http://aquaticcommons.org/id/eprint/3115 | 130 | 2011-09-29 17:52:01 | 3115
    Publication Date: 2021-07-01
    Description: The co-organized Alliance for Coastal Technologies (ACT) and National Data Buoy Center (NDBC)Workshop "Meteorological Buoy Sensors Workshop" convened in Solomons, Maryland, April 19to 21,2006, sponsored by the University of Maryland Center for Environmental Science (UMCES)Chesapeake Bay Laboratory (CBL), an ACT partner institution. Participants from various sectorsincluding resource managers and industry representatives collaborated to focus on technologies andsensors that measure the near surface variables of wind speed and direction, barometric pressure,humidity and air temperature. The vendor list was accordingly targeted at companies that producedthese types of sensors. The managers represented a cross section of federal, regional and academicmarine observing interests from around the country. Workshop discussions focused on the challengesassociated with making marine meteorological observations in general and problems that werespecific to a particular variable. Discussions also explored methods to mitigate these challengesthrough the adoption of best practices, improved technologies and increased standardization. Someof the key workshop outcomes and recommendations included:0cean.US should establish a committee devoted to observations. The committee wouldhave a key role in developing observing standards.The community should adopt the target cost, reliability and performance standards draftedfor a typical meteorological package to be used by a regional observing system.A forum should be established to allow users and manufacturers to share best practicesfor the employment of marine meteorological sensors. The ACT website would host theforum.Federal activities that evaluate meteorological sensors should make their results publiclyavailable.ACT should extend their evaluation process to include meteorological sensors.A follow on workshop should be conducted that covers the observing of meteorologicalvariables not addressed by this workshop. (pdf contains 18 pages)
    Description: NOAA
    Description: Alliance for Coastal Technologies, CBL/UMCES
    Keywords: Engineering ; Environment
    Repository Name: AquaDocs
    Type: monograph
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  • 8
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    Alliance for Coastal Technologies | Solomons, MD
    In:  http://aquaticcommons.org/id/eprint/3114 | 130 | 2011-09-29 17:51:58 | 3114 | University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory
    Publication Date: 2021-07-01
    Description: The Alliance for Coastal Technologies (ACT) convened a workshop on Evaluating Approaches and Technologies for Monitoring Organic Contaminants in the Aquatic Environment in Ann Arbor, MI on July 21-23, 2006. The primary objectives of this workshop were to: 1) identify the priority management information needs relative to organic contaminant loading; 2) explore themost appropriate approaches to estimating mass loading; and 3) evaluate the current status of thesensor technology. To meet these objectives, a mixture of leading research scientists, resourcemanagers, and industry representatives were brought together for a focused two-day workshop.The workshop featured four plenary talks followed by breakout sessions in which arranged groupsof participants where charged to respond to a series of focused discussion questions.At present, there are major concerns about the inadequacies in approaches and technologies forquantifying mass emissions and detection of organic contaminants for protecting municipal watersupplies and receiving waters. Managers use estimates of land-based contaminant loadings torivers, lakes, and oceans to assess relative risk among various contaminant sources, determinecompliance with regulatory standards, and define progress in source reduction. However, accuratelyquantifying contaminant loading remains a major challenge. Loading occurs over a range ofhydrologic conditions, requiring measurement technologies that can accommodate a broad rangeof ambient conditions. In addition, in situ chemical sensors that provide a means for acquiringcontinuous concentration measurements are still under development, particularly for organic contaminantsthat typically occur at low concentrations. Better approaches and strategies for estimatingcontaminant loading, including evaluations of both sampling design and sensor technologies,need to be identified. The following general recommendations were made in an effort to advancefuture organic contaminant monitoring:1. Improve the understanding of material balance in aquatic systems and the relationship betweenpotential surrogate measures (e.g., DOC, chlorophyll, particle size distribution) and target constituents.2. Develop continuous real-time sensors to be used by managers as screening measures and triggersfor more intensive monitoring.3. Pursue surrogate measures and indicators of organic pollutant contamination, such as CDOM,turbidity, or non-equilibrium partitioning.4. Develop continuous field-deployable sensors for PCBs, PAHs, pyrethroids, and emerging contaminantsof concern and develop strategies that couple sampling approaches with tools that incorporatesensor synergy (i.e., measure appropriate surrogates along with the dissolved organics toallow full mass emission estimation).[PDF contains 20 pages]
    Description: NOAA
    Description: Alliance for Coastal Technologies, CBL/UMCES
    Keywords: Engineering ; Earth Sciences ; Environment ; Chemistry
    Repository Name: AquaDocs
    Type: monograph
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  • 9
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    Alliance for Coastal Technologies | Solomons, MD
    In:  http://aquaticcommons.org/id/eprint/3125 | 130 | 2011-09-29 17:54:53 | 3125 | University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory
    Publication Date: 2021-06-25
    Description: The Alliance for Coastal Technology (ACT) convened a workshop on the in situ measurement ofdissolved inorganic carbon species in natural waters in Honolulu, Hawaii, on February 16, 17, and18, 2005. The workshop was designed to summarize existing technologies for measuring theabundance and speciation of dissolved inorganic carbon and to make strategic recommendationsfor future development and application of these technologies to coastal research and management.The workshop was not focused on any specific technology, however, most of the attention of theworkshop was on in situ pC02 sensors given their recent development and use on moorings forthe measurement of global carbon fluxes. In addition, the problems and limitations arising fromthe long-term deployment of systems designed for the measurement of pH, total dissolvedinorganic carbon (DIC), and total alkalinity (TA) were discussed. Participants includedresearchers involved in carbon biogeochemistry, industry representatives, and coastal resourcemanagers. The primary questions asked during the workshop were:I. What are the major impediments to transform presently used shipboard pC02 measurementsystems for use on cost-eficient moorings?2. What are the major technical hurdles for the in situ measurement of TA and DIC?3. What specific information do we need to coordinate efforts for proof of concept' testing ofexisting and new technologies, inter-calibration of those technologies, better softwaredevelopment, and more precise knowledge quantzjjing the geochemistry of dissolvedinoeanic carbon species in order to develop an observing system for dissolved inorganiccarbon?Based on the discussion resulting from these three questions, the following statements weremade:Statement No. 1Cost-effective, self-contained technologies for making long-term, accurate measurements of thepartial pressure of C02 gas in water already exist and at present are ready for deployment onmoorings in coastal observing systems.Statement No. 2Cost-effective, self-contained systems for the measurement of pH, TA, and DIC are still neededto both fully define the carbonate chemistry of coastal waters and the fluxes of carbon betweenmajor biogeochemical compartments (e.g., air-sea, shelf-slope, water column-sediment, etc.). (pdf contains 23 pages)
    Description: NOAA
    Description: Alliance for Coastal Technologies, CBL/UMCES
    Keywords: Conservation ; Earth Sciences ; Environment
    Repository Name: AquaDocs
    Type: monograph
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  • 10
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    Alliance for Coastal Technologies | Solomons, MD
    In:  http://aquaticcommons.org/id/eprint/3123 | 130 | 2011-09-29 17:52:46 | 3123 | University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory
    Publication Date: 2021-06-25
    Description: (pdf contains 23 pages)
    Description: NOAA
    Description: Alliance for Coastal Technologies, CBL/UMCES
    Keywords: Engineering ; Environment
    Repository Name: AquaDocs
    Type: monograph
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