Index Catalog // ScholarsArchive@OSU

The potential for top-down control on tropical tunas based on size structure of predator-prey interactions

Creator:: Hunsicker, Mary E., Olson, Robert J., Essington, Timothy E., Maunder, Mark N., Duffy, Leanne M., and Kitchell, James F.
Abstract:: The ecological consequences of widespread fisheries-induced reductions of large pelagic predators are not fully understood. Tropical tunas are considered a main component of apex predator guilds that include sharks and billfishes, and thus may seem unsusceptible to secondary effects of fishing top predators. However, intra-guild predation can occur because of...
Resource Type:: Article

Which design elements of individual quota fisheries help to achieve management objectives?

Creator:: Melnychuk, Michael C., Essington, Timothy E., Branch, Trevor A., Heppell, Selina S., Jensen, Olaf P., Link, Jason S., Martell, Steven J. D., Parma, Ana M., and Smith, Anthony D. M.
Abstract:: Individual quota (IQ) management systems in commercial marine fisheries are highly diverse, differing in the security, durability and exclusivity of the harvesting privilege and the transferability of quota units. This diversity in the degree of harvest rights may influence the effectiveness of IQ fisheries to meet management objectives. We conducted...
Resource Type:: Article

Can catch share fisheries better track management targets?

Creator:: Melnychuk, Michael C., Essington, Timothy E., Branch, Trevor A., Heppell, Selina S., Jensen, Olaf P., Link, Jason S., Martell, Steven J. D., Parma, Ana M., Pope, John G., and Smith, Anthony D. M.
Abstract:: Fisheries management based on catch shares – divisions of annual fleet-wide quotas among individuals or groups – has been strongly supported for their economic benefits, but biological consequences have not been rigorously quantified. We used a global meta-analysis of 345 stocks to assess whether fisheries under catch shares were more...
Resource Type:: Article
Full Text:: management targets? Michael C Melnychuk1, Timothy E Essington1, Trevor A Branch1,*, Selina S Heppell2

Catch shares, fisheries, and ecological stewardship: a comparative analysis of resource responses to a rights-based policy instrument

Creator:: Essington, Timothy E., Melnychuk, Michael C., Branch, Trevor A., Heppell, Selina S., Jensen, Olaf P., Link, Jason S., Martell, Steven J. D., Parma, Ana M., Pope, John G., and Smith, Anthony D. M.
Abstract:: Rights-based approaches are potentially promising tools to meet conservation objectives in natural resource management. Here, we evaluated how population status and fishery production respond to catch shares, a rights-based policy instrument in fisheries whereby participants are granted a right to harvest a fraction of the allowable catch. By analyzing time...
Resource Type:: Article
Full Text:: ; property-rights. Correspondence Timothy E. Essington, School of Aquatic and Fishery Sciences, University

Functional responses and scaling in predator–prey interactions of marine fishes: contemporary issues and emerging concepts

Creator:: Hunsicker, Mary E., Ciannelli, Lorenzo, Bailey, Kevin Mclean, Buckel, Jeffrey A., White, J. Wilson, Link, Jason S., Essington, Timothy E., Gaichas, Sarah, Anderson, Todd W., Brodeur, Richard D., Chan, Kung-Sik, Chen, Kun, Englund, Goran, Frank, Kenneth T., Freitas, Vania, Hixon, Mark A., Hurst, Thomas, Johnson, Darren W., Kitchell, James F., Reese, Doug, Rose, George A., Sjodin, Henrik, Sydeman, William J., van der Veer, Henk W., Vollset, Knut, and Zador, Stephani
Abstract:: Predatorprey interactions are a primary structuring force vital to the resilience of marine communities and sustainability of the worlds oceans. Human influences on marine ecosystems mediate changes in species interactions. This generality is evinced by the cascading effects of overharvesting top predators on the structure and function of marine ecosystems....
Resource Type:: Article
Full Text:: ,4 Jason S. Link,5 Timothy E. Essington,6 Sarah Gaichas,2 Todd W. Anderson,7 Richard D. Brodeur,8

Using Culture-independent Genomics as a Means for Understanding Chlamydial Biology

Creator:: Putman, Timothy E.
Abstract:: The chlamydiae are a family of obligate intracellular bacteria that have a unique bi-phasic developmental cycle, unique cellular properties, and a unique set of challenges to studying its biology. While genetic manipulation is becoming routine in Chlamydia, there are significant challenges to working with this intracellular parasite. The body of...
Resource Type:: Dissertation
Full Text:: ABSTRACT OF THE DISSERTATION OF Timothy E. Putman for the degree

Transient fuel pin temperature calculations using describing functions

Creator:: Guidotti, Timothy E.
Abstract:: An important element in rector safety and fuel performance assessments is the efficient calculation of the time dependent temperature profiles within reactor fuel pins. Because the fuel pins have temperature dependent thermal properties, the governing partial differential equations are nonlinear. Traditionally, finite difference or finite element methods have been used...
Resource Type:: Masters Thesis
Full Text:: describing functions AN ABSTRACT OF THE THESIS OF Timothy E. Guidotti for the degree of Master of Science

Growth and development of three meadowfoam (Limnanthes spp.) lines

Creator:: Fiez, Timothy E.
Abstract:: Meadowfoam (Limnanthes R. Br. spp.), a source of C₂₀ and C₂₂ fatty acids, is a new industrial oilseed crop adapted to the Willamette Valley of Oregon. Increased oil yield per land area may increase the rate of meadowfoam commercialization. Using two half-sib L. floccosa x L. alba lines, 85-765 and...
Resource Type:: Masters Thesis
Full Text:: .) lines AN ABSTRACT OF THE THESIS OF Timothy E. Fiez for the degree of Master of Science in Crop

Seasonal snowcover dynamics beneath boreal forest canopies

Creator:: Link, Timothy E.
Abstract:: The accurate simulation of snowpack deposition and ablation beneath forested areas is confounded by the fact that the vegetation canopy strongly affects the snow surface energy balance. The canopy alters the radiation balance of the snowcover, and reduces the wind speed at the snow surface. Data collected as part of...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Timothy E. Link for the degree of Master of Science in Geology

The water and energy dynamics of an old-growth seasonal temperate rainforest

Creator:: Link, Timothy E.
Abstract:: In the Pacific Northwest (PNW), concern about the impacts of climate and land cover change on water resources, flood-generating processes, and ecosystem dynamics emphasize the need for a mechanistic understanding of the interactions between forest canopies and hydrological processes. A detailed measurement and modeling program during the 1999 and 2000...
Resource Type:: Dissertation
Full Text:: of Philosophy dissertation of Timothy E. Link presented on October 2, 2001. 'J 'J i'i Co-Major

ScholarsArchive@OSU

The potential for top-down control on tropical tunas based on size structure of predator-prey interactions

Which design elements of individual quota fisheries help to achieve management objectives?

Can catch share fisheries better track management targets?

Catch shares, fisheries, and ecological stewardship: a comparative analysis of resource responses to a rights-based policy instrument

Functional responses and scaling in predator–prey interactions of marine fishes: contemporary issues and emerging concepts

Using Culture-independent Genomics as a Means for Understanding Chlamydial Biology

Transient fuel pin temperature calculations using describing functions

Growth and development of three meadowfoam (Limnanthes spp.) lines

Seasonal snowcover dynamics beneath boreal forest canopies

The water and energy dynamics of an old-growth seasonal temperate rainforest

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