\documentclass[english,german]{scrartcl}
\usepackage[latin1]{inputenc}
\usepackage{geometry}
\geometry{verbose,a4paper,tmargin=1.75cm,bmargin=2cm,lmargin=2cm,rmargin=2cm,headheight=0.8cm,headsep=0.5cm,footskip=0.5cm}
\usepackage{babel}
\usepackage{url}
\urlstyle{same}
\newcommand\email{\begingroup \urlstyle{same}\Url}\usepackage{graphicx}
\usepackage{units}
\usepackage{tabularx}
\usepackage{wasysym} % enable use of \permil instead of \textperthousand
\usepackage{marvosym}
\usepackage{arabtex}
\usepackage{hyphenat}
\usepackage{booktabs}
\usepackage{mdwlist}
\renewcommand{\thefootnote}{\relax}
\usepackage{index}
\newindex{key}{kdx}{knd}{Keywords}
\newindex{author}{idx}{ind}{Authors}
\usepackage{fancyhdr}
\pagestyle{fancy}
\renewcommand{\headrulewidth}{0pt}
\fancyfoot{}
\usepackage{ifpdf}
\ifpdf
%\usepackage[activate]{pdfcprot}
%\usepackage[owner=Tapioka, print=true, copy=true, edit=false, annotate=false,set]{pdfcrypt}
%encryption: not supported any more (since pdftex 1.10)
\usepackage[pdftex]{thumbpdf}
\usepackage[pdftex]{hyperref}
\hypersetup{pdftitle={Analysis of the Determinants of Stock Collapse:the Case of the American Lobster Fishery of Long Island Sound},pdfauthor={Michele Baggio},pdfsubject={Tropentag 2010: Abstract},pdfkeywords={American lobster, Bioeconomic model, Open access, Pollution, Sea temperature},pdfpagemode=None,colorlinks=true}
\else
\usepackage{ae}
\usepackage{textcomp}
\fi
\begin{document}
\ifpdf
\parbox[b]{2.5cm}{\resizebox*{2.5cm}{!}{\includegraphics{dtt2010.jpg}}}
\else
\parbox[b]{2.5cm}{\resizebox*{2.5cm}{!}{\includegraphics{dtt2010.eps}}}
\fi
\hfill
\parbox[b]{13.4cm}{\centering \large{\textbf{Tropentag, September 14-16, 2010, Zurich}}\\[1ex] \Large{``World Food System  ---\\A Contribution from Europe''\\[2ex]}}
\hspace{0.1cm}
\begin{center}
\Large{\textbf{Analysis of the Determinants of Stock Collapse:the Case of the American Lobster Fishery of Long Island Sound\footnote{\textbf{Contact Address:} Michele Baggio, ETH Zurich, Professorship for Environmental Policy and Economics, Institute for Environmental Decisions, Universitaetstr. 22 Chn 76.2, 8092~Zurich, Switzerland, \mbox{e-mail}: \email{michele.baggio@env.ethz.ch}}\\[0.8ex]}}
\normalsize{\textsc{Michele Baggio}}
\end{center}
\begin{itemize*}
\item[]{\small{\textit{ETH Zurich, Professorship for Environmental Policy and Economics, Institute for Environmental Decisions, Switzerland}}}
\end{itemize*}
\index[author]{Baggio, Michele}
\begin{center}
\vspace{1.1cm}
\textbf{Abstract}
\begin{abstract}
\normalsize{
Significant attention was given to the unprecedented and severe die--off that American lobsters experienced in Long Island Sound (LIS) in 1999. This event stimulated several research projects aimed at explaining the causes of the die--off. Factors such as anthropogenic and environmental stressors, as well as diseases were investigated. The direct cause of mortality was attributed to a parasite infection. However, the general consensus among scientists is that a combination of environmental factors, mainly temperature, triggered this mortality event. They believed that the extent of the infection outbreak was augmented by a prolonged exposure to high bottom water temperature which suppressed lobsters' immune system making them more susceptible to the infection. This explanation ignores the role of anthropogenic factors, notably the potential roles of overfishing due to the open access conditions under which the lobster population is exploited and of nutrient discharges causing hypoxic conditions in the Sound. This paper investigates the relative importance of uncontrollable environmental factors like high temperatures and anthropogenic factors like overfishing and hypoxia in the 1999 die"=off.  I combine data from annual trawl surveys and lobstermen's logbooks to construct a combined model of lobster population dynamics and fishing effort.  I use the model to investigate the relative importance of high temperatures, low dissolved oxygen, and incentives for more intensive fishing effort experienced in the Sound in 1999.  The simulations show that low dissolved oxygen was the major factor underlying the die"=off.  Overfishing was a minor contributor, largely because fishing mortality in the Sound has been low relative to population size.  These results indicate that stricter regulation of nutrient emissions may be the most effective way to protect fisheries like the Long Island Sound lobster fishery.  They suggest in addition that global warming may exacerbate the problems experienced by coastal fisheries like this one, making the need for stricter regulation of nutrient emissions more acute.}

\vspace{0.5cm}
\end{abstract}
\end{center}
\noindent \textbf{Keywords:} American lobster, Bioeconomic model, Open access, Pollution, Sea temperature
\index[key]{American lobster}
\index[key]{Bioeconomic model}
\index[key]{Open access}
\index[key]{Pollution}
\index[key]{Sea temperature}
\end{document}