Browsing Scholarly Works, Fish and Wildlife Conservation by Issue Date
Now showing items 21-40 of 437
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Water Quality Impacts of Three Biofilter Designs in Recirculating Aquaculture Systems
(Commercial Fish and Shellfish Technologies Program, Virginia Tech, 2002-06-01)Nine recirculating aquaculture systems utilizing three biofilter types were placed on line and stocked with yellow perch, Percaflavescens, fingerlings. Biofilter type differed among systems, and included upflow pulsed bed ... -
Intercontinental convergence of stream fish community traits along geomorphic and hydraulic gradients
(Ecological Society of America, 2002-07)Community convergence across biogeographic ally distinct regions suggests the existence of key, repeated, evolutionary mechanisms relating community characteristics to the environment. However, convergence studies at the ... -
Effects of blood extraction on horseshoe crabs (Limulus polyphemus)
(National Marine Fisheries Service Scientific Publication Office, 2003-04)Horseshoe crabs (Limulus polyphemus) are caught by commercial fishermen for use as bait in eel and whelk fisheries (Berkson and Shuster, 1999)—fisheries with an annual economic value of $13 to $17 million (Manion et al.1). ... -
Characteristics of the Recirculation Sector of Finfish Aquaculture in the United States and Canada
(Commercial Fish and Shellfish Technologies Program, Virginia Tech, 2003-06-01)In the autumn of 2001, a survey was conducted to examine basic farm production and human resource characteristics of recirculation facilities in the United States and Canada currently growing finfish. An 86% response rate ... -
A model for assessing the likelihood of self-sustaining populations resulting from commercial production of triploid Suminoe oysters (Crassostrea ariakensis) in Chesapeake Bay
(National Marine Fisheries Service Scientific Publication Office, 2003-10)Culture of a non-native species, such as the Suminoe oyster (Crassostrea ariakensis), could offset the harvest of the declining native eastern oyster (Crassostrea virginica) fishery in Chesapeake Bay. Because of possible ... -
Abundance of horseshoe crabs (Limulus polyphemus) in the Delaware Bay area
(National Marine Fisheries Service Scientific Publication Office, 2003-10)Discusses a study on horseshoe crabs in the vicinity of Delaware Bay. Abundance of horseshoe crabs in the area; Factor that influenced horseshoe crab catchability; Mean abundance estimate for all crabs. -
The use of camera traps for estimating jaguar Panthera onca abundance and density using capture/recapture analysis
(Cambridge University Press, 2004-04)Across their range jaguars Panthera onca are important conservation icons for several reasons: their important role in ecosystems as top carnivores, their cultural and economic value, and their potential conflicts with ... -
Hatchery and Grow-out Performance of Sunshine Bass and Backcross Hybrid Striped Bass in Recirculating Aquaculture Systems
(Commercial Fish and Shellfish Technologies Program, Virginia Tech, 2004-06-01)Previous research has suggested that backcross hybrid striped bass (BX: sunshine bass female x striped bass male) perform as well as F1 hybrid striped bass (sunshine bass: white bass female x striped bass male) for many ... -
Influences of Fluctuating Releases on Stream Fishes and Habitat in the Smith River, below Philpott Dam
(Virginia Tech, 2004-12)Operations of Philpott dam for flood control and peak power generation since 1953 have substantially altered downstream ecosystem conditions in the Smith River from the dam to Martinsville. We have described in intensive ... -
Stream Habitat Modeling to Support Water Management Decisions for the North Fork Shenandoah River, Virginia
(Virginia Tech, 2004-12)This four-year instream flow study was initiated to evaluate the hydraulics, habitat, and water quality of the North Fork Shenandoah River, Virginia, during low flow conditions. Virginia Tech in cooperation with the United ... -
The application of microsatellite DNA markers for forensic analysis of koi carp (Cyprinus carpio)
(Academy of Science of South Africa, 2005)We describe the use of microsatellite DNA markers, previously developed for common carp, to investigate a forensic case involving ornamental koi carp. Two South African breeders offered koi strains for sale, which a third ... -
Survey for the Newly Discovered Dan Spinymussel in the Dan, Mayo, and South Mayo Rivers, Virginia
(Virginia Center for Transportation Innovation and Research, 2005-05)Three spined, mussel species occur in the United States along the Atlantic slope: James spinymussel (Pleurobema collina), Tar spinymussel (Elliptio steinstansana), and Altamaha spinymussel (E. spinosa). The James spinymussel ... -
Electric Shock Injuries in a Harris's Hawk Population
(Raptor Research Foundation, 2006)Electrocution may be an important agent of mortality in many raptor populations, and has been implicated as a contributing factor in the endangerment of some species. In Tucson, Arizona U.S.A. the electrocution of Harris's ... -
A production modeling approach to the assessment of the horseshoe crab (Limulds polyphemus) population in Delaware Bay
(National Marine Fisheries Service Scientific Publication Office, 2006-04)Horseshoe crab (Limulus polyphemus) is harvested commercially, used by the biomedical industry, and provides food for migrating shorebirds, particularly in Delaware Bay. Recently, decreasing crab population trends in this ... -
Potential causes of mortality for horseshoe crabs (Limulus polyphemus) during the biomedical bleeding process
(National Marine Fisheries Service Scientific Publication Office, 2006-04)Biomedical companies catch and bleed horseshoe crabs for the production of Limulus amebocyte lysate (LAL), a product used for protecting public health (Berkson and Shuster, 1999). LAL is a clotting agent, derived solely ... -
Effects of a simulated fishing moratorium on the stock assessment of red porgy (Pagrus pagrus)
(National Marine Fisheries Service Scientific Publication Office, 2006-10)Much of the information available on the population status of a harvested fish species is obtained from landings data. When fishing restrictions are in place, fishery-dependent data are reduced and assessments rely more ... -
Preventing Raptor Electrocutions in an Urban Environment
(Raptor Research Foundation, 2007)Electrocution of raptors on poles supporting overhead electric lines is a cause of concern in the United States. Techniques for modifying (i.e., retrofitting) potentially lethal poles to reduce electrocutions have been ... -
Range-wide Assessment of Habitat Suitability for Roanoke Logperch (Percina rex)
(Virginia Center for Transportation Innovation and Research, 2007-01)The Roanoke logperch (Percina rex) is a federally endangered darter endemic to Virginia. Knowledge of its distribution and habitat requirements is limited. Before this study, it was known to occur in the Smith, Pigg, Roanoke ... -
Threat of hantavirus pulmonary syndrome to field biologists working with small mammals
(2007-09)Low risk for hantavirus pulmonary syndrome (HPS) has been reported among biologists engaged in fieldwork with rodents. The overall probability of acquiring HPS when working with rodents appears to be 1 in 1,412 (0.00071). ... -
Ocelot Leopardus pardalis in Belize: the impact of trap spacing and distance moved on density estimates
(Cambridge University Press, 2007-10)We used remote cameras to obtain information on an elusive species and to examine the effects of different camera trapping methodologies on abundance estimates. We determined activity pattern, trail use, trap success, and ...
