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Articles 1 - 9 of 9

Full-Text Articles in Animal Sciences

Simulated Performance Of Catch Curve Methods For Estimating Total Mortality Rate, Matthew W. Smith, John M. Hoenig Oct 2012

Simulated Performance Of Catch Curve Methods For Estimating Total Mortality Rate, Matthew W. Smith, John M. Hoenig

Reports

This document has been issued as VIMS Data Report 60 and provides additional simulation results for Smith et al. (2012) published in the North American Journal of Fisheries Management. Catch curve methods are a basic tool of population dynamics for estimating total mortality rate from age composition. There are a number of methodological issues which remain unresolved. Smith et al. (2012) attempts to provide guidelines on the use of these methods based on extensive Monte Carlo simulations. This report presents additional simulation results to supplement the results in the journal article. The estimators, evaluation criteria, simulation procedures, and conditions simulated …


Incorporating Circle Hooks Into Atlantic Pelagic Fisheries: Case Studies From The Commercial Tuna/Swordfish Longline And Recreational Billfish Fisheries, John Graves, Az Horodysky, Dw Kerstetter Jul 2012

Incorporating Circle Hooks Into Atlantic Pelagic Fisheries: Case Studies From The Commercial Tuna/Swordfish Longline And Recreational Billfish Fisheries, John Graves, Az Horodysky, Dw Kerstetter

VIMS Articles

An emerging body of literature has demonstrated the benefits of the use of circle hooks relative to standard J-hooks in commercial and recreational fisheries. In the pelagic longline fishery for tunas (Thunnus spp.) and swordfish (Xiphias gladius Linnaeus, 1758), the use of circle hooks has resulted in greater catch rates of some target species, lower catch rates of some bycatch species, and a higher percentage of many target and bycatch species alive at the time of haulback (gear retrieval). However, a lack of agreement among results of studies conducted in different fisheries and areas, using different baits and rigging techniques, …


Circle Hooks In Commercial, Recreational, And Artisanal Fisheries: Research Status And Needs For Improved Conservation And Management, Je Serafy, Sj Cooke, Ga Diaz, John Graves, Et Al Jul 2012

Circle Hooks In Commercial, Recreational, And Artisanal Fisheries: Research Status And Needs For Improved Conservation And Management, Je Serafy, Sj Cooke, Ga Diaz, John Graves, Et Al

VIMS Articles

The intent of convening the International Symposium on Circle Hooks in Research, Management, and Conservation was to yield a contemporary, science-based assessment of the management and conservation utility of circle hooks in commercial, recreational, and artisanal fisheries around the globe. The symposium objective was to provide a forum for individuals, organizations, and agencies to share relevant research results and perspectives. Based on the presentations, an examination of the literature, and the collective experience and knowledge of the authors, we provide a brief overview of the current status of circle hook research along with a list of research needs, with a …


Virginia Game Fish Tagging Program Annual Report 2011, Susanna Musick, Lewis Gillingham May 2012

Virginia Game Fish Tagging Program Annual Report 2011, Susanna Musick, Lewis Gillingham

Reports

Through 2011, the Virginia Game Fish Tagging Program has maintained a 17-year database of records for tagged and recaptured fish. The program is a co-operative project of the Virginia Saltwater Fishing Tournament (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).


Evaluation Of Striped Bass Stocks In Virginia, Monitoring And Tagging Studies, 2010-2014 : Progress Report, 1 September 2010 - 31 August 2011, Philip W. Sadler, Matthew W. Smith, John M. Hoenig, Robert E. Harris, Lydia M. Goins Jan 2012

Evaluation Of Striped Bass Stocks In Virginia, Monitoring And Tagging Studies, 2010-2014 : Progress Report, 1 September 2010 - 31 August 2011, 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 2010 through 31 August 2011. It includes an assessment of the biological characteristics of striped bass taken from the 2011 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. The information contained in this report is required by the Atlantic States Marine Fisheries Commission and is used to implement a coordinated management plan for …


Seasonal Distributions And Movements Of Longnose Gar (Lepisosteus Osseus) Within The York River System, Virginia, Patrick E. Mcgrath, Eric J. Hilton, John A. Musick Jan 2012

Seasonal Distributions And Movements Of Longnose Gar (Lepisosteus Osseus) Within The York River System, Virginia, Patrick E. Mcgrath, Eric J. Hilton, John A. Musick

VIMS Articles

The seasonal movements of Lepisosteus osseus (Longnose Gar) are largely unknown. The goal of this project was to characterize spawning movements and seasonal distributions by using acoustic tagging methods and examining historical catch records from a trawl survey. This is the first time that movements have been studied for an estuarine population of Longnose Gar. Two individuals moved greater minimum distances (69 and 74 km) than found in the only other report on movement in this species. Spawning-ground residency time, collected from two tagged Longnose Gar, was approximately one month, and tidal periodicity was observed for one of the two …


The Status Of Virginia's Public Oyster Resource 2011, Melissa Southworth, Roger L. Mann Jan 2012

The Status Of Virginia's Public Oyster Resource 2011, Melissa Southworth, Roger L. Mann

Reports

This report summarizes data collected during 2011 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.


Unprecedented Restoration Of A Native Oyster Metapopulation, David M. Schulte Jan 2012

Unprecedented Restoration Of A Native Oyster Metapopulation, David M. Schulte

Dissertations, Theses, and Masters Projects

No abstract provided.


Estimation Of Juvenile Striped Bass Relative Abundance In The Virginia Portion Of Chesapeake Bay, January 2011-December 2011 : Annual Progress Report, Leonard S. Machut, Mary C. Fabrizio Jan 2012

Estimation Of Juvenile Striped Bass Relative Abundance In The Virginia Portion Of Chesapeake Bay, January 2011-December 2011 : Annual Progress Report, Leonard S. Machut, Mary C. Fabrizio

Reports

The 2011 striped bass juvenile abundance index is 27.09 and is significantly higher than the historic average of 7.92. Unlike previous years, the 2011 York River index was the highest among Virginia watersheds with high recruitment in both the Pamunkey and Mattaponi rivers. All individual river JAI values were significantly higher than their respective historic averages except for the Chickahominy River which was not significantly different from its historic average. This suggests a strong year class was produced in the Virginia portion of Chesapeake Bay in 2011. Sampling of auxiliary stations provides greater spatial coverage of the nursery grounds and …