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\hypersetup{pdftitle={Population Dynamics of Grey Mullet \textit{Mugil cephalus} Associated with Seagrass Community in Bardawil Lagoon, Northern Sinai, Egypt},pdfauthor={Muhammad Hegazi, Sahar Mehanna},pdfsubject={Tropentag 2010: Abstract},pdfkeywords={Bardawil lagoon, Egypt, management, Mugilidae, population dynamics, seagrass beds},pdfpagemode=None,colorlinks=true}
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\parbox[b]{13.4cm}{\centering \large{\textbf{Tropentag, September 14-16, 2010, Zurich}}\\[1ex] \Large{``World Food System  ---\\A Contribution from Europe''\\[2ex]}}
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\Large{\textbf{Population Dynamics of Grey Mullet \textit{Mugil cephalus} Associated with Seagrass Community in Bardawil Lagoon, Northern Sinai, Egypt\footnote{\textbf{Contact Address:} Muhammad Hegazi, Suez Canal University, Marine Science, Faculty of Science Suez Canal University 41522 Ismailia Egypt, 555~Ismailia, Egypt, \mbox{e-mail}: \email{hegazi16054@yahoo.com}}\\[0.8ex]}}
\normalsize{\textsc{Muhammad Hegazi$^{1}$, Sahar Mehanna$^{2}$}}
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\begin{itemize*}
\item[]{\small{\textit{$^{1}$Suez Canal University, Marine Science, Egypt}}}
\item[]{\small{\textit{$^{2}$National Institute of Oceanography and Fisheries, Fish Population Dynamics, Egypt}}}
\end{itemize*}
\index[author]{Hegazi, Muhammad}
\index[author]{Mehanna, Sahar}
\begin{center}
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\textbf{Abstract}
\begin{abstract}
\normalsize{
The evaluation and management of fisheries resources requires knowledge of spatial and temporal changes in the habitat"=associations of fishes. However, most studies concerning habitat associations of fishes in the shallow areas and lagoons have been limited to daytime sampling strategies. The grey mullet, \textit{Mugil cephalus }is one of the most important and high valued fish species in Bardawil lagoon, Egypt. Long term commercial catch statistics show a significant decrease in the commercial landings of grey mullet in Bardawil lagoon since 1995. By learning more about the biology and population dynamics of this species and protecting the habitat upon which it depends, we can ensure that this important valuable fish resource remains abundant. In this work the population dynamics of grey mullet associated with seagrass community at one of the most important lagoon in Egypt were examined. Age was determined based on scale's readings of fish collected in April 2008 to December 2009 where all fishing operations were prohibited during January through the end of March. Growth parameters, mortality rates, exploitation level, biomass and yield per recruit as well as the distribution according to seagrass community were studied. The results suggest that differences in fish species richness and abundance are primarily related to habitat structure, the ecological importance and the need for protection of such shallow habitats for their crucial role as nurseries for many fish species, as well as the mugilid fishery in Bardawil lagoon is heavily exploited and management measures must be applied to sustain and optimise its yield. }

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\noindent \textbf{Keywords:} Bardawil lagoon, Egypt, management, Mugilidae, population dynamics, seagrass beds
\index[key]{Bardawil lagoon}
\index[key]{Egypt}
\index[key]{Management}
\index[key]{Mugilidae}
\index[key]{Population dynamics}
\index[key]{Seagrass beds}
\end{document}