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annotated bibliography of fisheries economics literature - Office of ...

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Wildlife Management.<br />

Due to world wide declines in sea turtle populations, efforts are being<br />

made to mitigate effects on humans on turtle mortality. This paper shows<br />

conservation efforts can be interpreted only with population monitoring and an<br />

understanding <strong>of</strong> population dynamics. The example used investigates whether<br />

we can detect changes in nesting turtle numbers from reduced turtle mortality<br />

through use <strong>of</strong> Turtle Excluder Devices (TEDs) on shrimp trawls. An age<br />

specific model <strong>of</strong> the Little Cumberland Island, Georgia population <strong>of</strong><br />

loggerhead sea turtles (Caretta), concludes that the two largest sources <strong>of</strong><br />

uncertainty, unknown age <strong>of</strong> first reproduction (AFR) and unknown history <strong>of</strong><br />

survival rate changes, have large effects on future population trajectories.<br />

Unless estimates <strong>of</strong> AFR are improved, it will be impossible to interpret the<br />

effect <strong>of</strong> TED use in the next decade. Models must account for population<br />

history. Use <strong>of</strong> time invariant survival rates leads to overestimation <strong>of</strong> our<br />

ability to detect the effect <strong>of</strong> TED use. Caution is advised when interpreting<br />

results obtained form equations that use only population size, particularly<br />

when data represent a portion <strong>of</strong> the population.<br />

Taylor, David L. (1979). "Preliminary Stock Assessment, North Carolina:<br />

Rock Shrimp (Sicyonia brevirostris)." North Carolina Department<br />

<strong>of</strong> Natural Resources and Community Development, Division <strong>of</strong> Marine<br />

Fisheries, Morehead City, NC, December, 19 pp.<br />

During October, 1979, the R/V Dan Moore utilized a conventional shrimp<br />

trawl at 22 locations <strong>of</strong>fshore North Carolina from south <strong>of</strong> Cape Hatteras to<br />

southwest <strong>of</strong> Cape Fear in search <strong>of</strong> rock shrimp. Data were compiled on<br />

distribution, relative abundance, size and sex composition, and cull rates.<br />

Rock shrimp were found to be more abundant in Long Bay than in Onslow and<br />

Raleigh Bays, and it was evident that catches decreased in numbers as latitude<br />

increased. Although the vast majority (94.8%) <strong>of</strong> rock shrimp captured were <strong>of</strong><br />

commercial size, nowhere were they located in commercially significant<br />

concentrations. Males averaged slightly smaller in total length than females<br />

and females became more numerous than males in the larger size categories.<br />

Sex ratio did not vary significantly from 1:1.<br />

Taylor, Keri H., Fred J. Prochaska, and James C. Cato (1982). "Economic<br />

Returns in Operating Florida Atlantic Coast Charter and Party<br />

Boats, 1980-81." Sea Grant Project No. R/L-1, Grant No. NA80AA-D-<br />

00038, Marine Advisory Bulletin MAP-28, Florida Sea Grant College<br />

Program, August, 15 pp.<br />

This bulletin attempts to provide individual charter boat and party boat<br />

owners/captains with basic economic information with which they can compare<br />

their own operations and compare the economic characteristics <strong>of</strong> the charter<br />

boat industry on the north and south Florida Atlantic coasts. This has been<br />

accomplished by providing a description <strong>of</strong> the general characteristics <strong>of</strong><br />

charter boats and party boats in the fleet, an analysis <strong>of</strong> fishing activity<br />

and costs and returns, and a comparison <strong>of</strong> the differences in charter boat<br />

operations between north and south Florida.<br />

Taylor, C. Robert (1984). "Stochastic Dynamic Duality: Theory and<br />

Empirical Applicability." American Journal <strong>of</strong> Agricultural<br />

Economics, 66(3):351-357.<br />

This paper explores duality relationships for a broad class <strong>of</strong><br />

stochastic dynamic production problems. Assuming that the decision maker<br />

maximizes the expected present value <strong>of</strong> pr<strong>of</strong>it, it is shown that product<br />

supply, negative factor demand, and negative quasifixed factor acquisition<br />

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