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“This paper presents an integrated agent-based model of recreational fishing behavior within a reef ecosystem as a platform for the evaluation of recreational fishing management strategies. Angler behavior is described using econometrically estimated site choice models, with site choice among anglers driven by site attributes and angler characteristics. The biophysical model represents the marine reef environment as a system

with different trophic levels identifying algal and coral growth as well as two types of fish (piscivores and herbivores). Wnt tumor Ecosystem dynamics are driven by interactions within the trophic levels and interaction between fish populations and fishing activities. The model is used to simulate recreational fishing activities and their interactions with the environment. Recreational fishing sites from the Ningaloo Marine Park, an iconic coral reef system in Western Australia, are used as a case study. A set of management

Selleck Citarinostat strategies, including “business-as-usual” and different site closure durations, are assessed for two different levels of fishing pressures. The results show that not only the Belinostat inhibitor effectiveness but

also the distribution of management impacts across space and over time can be very different from what one would expect without the benefit of integrated modeling. (C) 2011 Elsevier B.V. All rights reserved.”
“Magnesium alloys have been intensively studied as biodegradable implant materials, as their mechanical properties render them promising candidates for bone tissue engineering applications. In the present work, porous Mg-4 wt% Zn and Mg-6 wt% Zn scaffolds were prepared using a powder metallurgy process. The effects of the porosity and Zn content on the microstructure and the mechanical properties of the fabricated scaffolds were studied. The above mentioned fabrication process involved sequential stages of mixing and compression of Mg and Zn powders with carbamide materials as space-holder particles followed by sintering the green compacts at different temperatures below the melting point of Mg. The results indicate that the porous Mg-Zn specimens with a porosity and pore size of approximately 21-36% and 150-400 mu m, respectively, could have enhanced mechanical properties comparable with those of cancellous bone.