Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 4 of 4
Full-Text Articles in Life Sciences
Environmental Change In The Coastal Environment: Challenges For The Selection And Propagation Of Filter Feeding Species In Aquaculture, Stock Enhancement And Environmental Rehabilitation, Roger L. Mann
VIMS Articles
Selection of species for aquaculture, fishery stock enhancement and environmental rehabilitation or restoration in the coastal zone requires consideration of the fact that species have evolved over geological time whereas changes in the coastal environment have occurred predominantly over recent historical time, often with the largest changes occurring within the past decades of human activity. The evolutionary issue is particularly noted with filter feeding molluscs, where extant species supporting both major natural fisheries and aquaculture have ancient lineages and evolved in environments that may have differed considerably from the locally turbid, nutrient enriched, disturbed (through watershed change and local activity) …
Evidence Of Shark Predation And Scavenging On Fishes Equipped With Pop-Up Satellite Archival Tags, David Kerstetter, Jeffery J. Polovina, John Graves
Evidence Of Shark Predation And Scavenging On Fishes Equipped With Pop-Up Satellite Archival Tags, David Kerstetter, Jeffery J. Polovina, John Graves
VIMS Articles
No abstract provided.
Deterministic And Stochastic Capacity Estimation For Fishery Capacity Reduction, James Kirkley, Catherine Morrison Paul, Dales Squires
Deterministic And Stochastic Capacity Estimation For Fishery Capacity Reduction, James Kirkley, Catherine Morrison Paul, Dales Squires
VIMS Articles
Deterministic data envelopment analysis (DEA) and stochastic pro- duction frontier (SPF) models are alternative methods for estimating capacity in fisheries. Fishery managers should be aware of likely differences in the capacity estimates obtained from these approaches if such estimates are to be used to support capacity reduction programs. In this paper, we provide a comparative analysis of DEA and SPF capacity estimates for a variety of possible capacity concepts using a panel data set for 10 vessels in the U.S. Northwest Atlantic scallop fishery. We find that DEA capacity output measures are higher than cor- responding SPF measures, but that …
Short-Run Welfare Losses From Essential Fish Habitat Designations For The Surfclam And Ocean Quahog Fisheries, Robert L. Hicks, James Kirkley, Iver E. Strand Jr.
Short-Run Welfare Losses From Essential Fish Habitat Designations For The Surfclam And Ocean Quahog Fisheries, Robert L. Hicks, James Kirkley, Iver E. Strand Jr.
VIMS Articles
In this paper, we present a spatial model of fishing that can be used to assess some of the economic welfare losses to producers from setting aside essential fish habitat (EFH) areas. The paper demonstrates how spatially explicit behavioral models of fishing are estimated, how these models can be used to measure welfare losses to fishermen, and how these models can then, in turn, be used to simulate fishing behavior. In developing the spatial model of fishing behavior, the work incorporates ideas of congestion and information effects, and we show a modification of standard welfare measures that accounts for these …