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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
    Format: application/pdf
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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 and Estuarine Studies. Chesapeake Biological Laboratory | Solomons, MD
    In:  http://aquaticcommons.org/id/eprint/5034 | 130 | 2012-06-26 23:26:47 | 5034 | University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory
    Publication Date: 2021-07-08
    Description: This research program consisted of three major componentareas: (I) development of experimental design, (II) calibration of the trawl design, and (III) development of the foundation for stock assessment analysis. The products which haveI. EXPERIMENTAL DESIGN resulted from - the program are indicated below: The study was successful in identifying spatial and temporal distribution characteristics of the several key species, and the relationships between given species catches and environmental and physical factors which are thought to influence species abundance by areas within the mainstem of the Chesapeake Bay and tributaries
    Description: Maryland Department of Natural Resources
    Description: U. S. Department of the Interior Fish and Wildlife Service
    Keywords: Ecology ; Fisheries ; Management ; Chesapeake Bay ; Fisheries ; Stock Assessment ; trawl ; analysis ; Striped Bass ; Morone Saxatilis ; Weakfish ; Flounder ; Croaker ; Hogchoker
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 162
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  • 5
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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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  • 6
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    University of Maryland Center for Environmental Science | Solomons, MD
    In:  http://aquaticcommons.org/id/eprint/6775 | 130 | 2011-09-29 13:08:39 | 6775 | University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory
    Publication Date: 2021-06-26
    Description: This report to the Maryland General Assembly covers: design and operation of the hydraulic clam dredge; summary of knowledge of Maryland's soft shell clam resource; development and present status; Potential value of the resource; Effects of the hydraulic clam dredge; evaluation of the effects of certain proposals concerning the soft shell clam industry; summary.
    Description: Also issued as Report Study Report no. 11
    Keywords: Aquaculture ; Ecology ; Environment ; Planning ; Policies
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 27
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  • 7
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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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  • 8
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    Maryland Department of Research and Education, Chesapeake Biological Laboratory | Solomons, MD
    In:  http://aquaticcommons.org/id/eprint/2161 | 130 | 2011-09-29 19:35:57 | 2161 | University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory
    Publication Date: 2021-07-12
    Description: Investigation of Ctenophores in the Chesapeake Bay area, includes some aspects of their life history, growth, reproduction, feeding and food habits, abundance and distribution. the purpose of the entire project is to supplement and add to the biological knowledge and understanding of ctenophores as a group and of the several individual species found int he area to be studied. Includes possible factors involved and implications also being looked at. (PDF contains 33 pages)
    Keywords: Ecology ; Ctenophora ; estuary ; life history
    Repository Name: AquaDocs
    Type: monograph
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  • 9
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    University of Maryland Center for Environmental and Estuarine Studies Chesapeake Biological Laboratory | Solomons, MD
    In:  http://aquaticcommons.org/id/eprint/2162 | 130 | 2011-09-29 19:36:00 | 2162 | University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory
    Publication Date: 2021-07-12
    Description: A study to assess the effects of hydraulic escalator dredging on an oyster community was initiated at the request of the Department of Natural Resources, Mary1and Tidewater Fisheries Administration. The purpose of the work was to reevaluate a study done by Manning (1957). A site in the Patuxent River north of Broome Island classified as oyster bottom was selected to conduct an in - situ intensive experiment using the Manning study as a framework for project design. Clams and oysters were present in the study area,although oyster populations were limited in number. (PDFs consists of pp 1-97 and additional Sect II: Middle Bay proposed reclassification sites)
    Description: Maryland Department of Natural Resources, Maryland Tidewater Fisheries
    Description: CBL-Reference Series
    Keywords: Ecology ; Fisheries ; hydraulic escalator ; dredging ; oyster
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
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  • 10
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    University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory | Solomons, MD
    In:  http://aquaticcommons.org/id/eprint/2168 | 130 | 2011-09-29 19:36:32 | 2168 | University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory
    Publication Date: 2021-07-12
    Description: Ichthyoplankton surveys in the Potomac River and Upper Chesapeake Bay were carried out in 1989 to estimate striped bass egg productions, age specific spawning biomasses of adult females, cohort-specific larval growth and mortality rates, and hatch dates of 8.0 mm larvae survivors. Possibleconsequences to recruitment of environmental factors were examined in 1989 and for data collected in 1987-1988.The temporal and spatial occurrences and distributions of eggs and larvae In both spawning areas are described and discussed in relation to environmental factors (temperature,rainfall, river discharge, pH, conductivity, zooplankton abundances) (PDF contains 319 pages)
    Description: Maryland Department of Natural Resources, Md. Tidewater Fisheries
    Description: CBL-Reference Series
    Keywords: Ecology ; Fisheries ; Striped bass ; biomass ; recruitment ; Chesapeake ; Potomac
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
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