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\hypersetup{pdftitle={Using Otolith Dimensions in Estimation of Size and Mass of Silver Sillago, \textit{Sillago sihama}},pdfauthor={Mohammad Sadegh Alavi Yeganeh, Seyedeh Narges Mirhadi},pdfsubject={Tropentag 2016: Abstract},pdfkeywords={Otolith, sagittal otolith, sillaginidae},pdfpagemode=None,colorlinks=true}
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\parbox[b]{13.4cm}{\centering \large{\textbf{Tropentag, September 18-21, 2016, Vienna, Austria}}\\[1ex] \Large{``Solidarity in a competing world ---\\fair use of resources''\\[2ex]}}
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\begin{center}
\Large{\textbf{Using Otolith Dimensions in Estimation of Size and Mass of Silver Sillago, \textit{Sillago sihama}\footnote{\textbf{Contact Address:} Mohammad Sadegh Alavi Yeganeh, Tarbiat Modares University, Marine Sciences, 4641776489~Nur, Iran, \mbox{e-mail}: \email{malavi@modares.ac.ir}}\\[0.8ex]}}
\normalsize{\textsc{Mohammad Sadegh Alavi Yeganeh$^{1}$, Seyedeh Narges Mirhadi$^{2}$}}
\end{center}
\begin{itemize*}
\item[]{\small{\textit{$^{1}$Tarbiat Modares University, Marine Sciences, Iran}}}
\item[]{\small{\textit{$^{2}$Tarbiat Modares University, Marine Sciences, }}}
\end{itemize*}
\index[author]{Alavi Yeganeh, Mohammad Sadegh}
\index[author]{Mirhadi, Seyedeh Narges}
\begin{center}
\vspace{1.1cm}
\textbf{Abstract}
\begin{abstract}
\normalsize{
Silver sillago, \textit{Sillago sihama }(Forsskål, 1775) is distributed in all coasts of the Persian Gulf and the Oman Sea in Iran. It is moderate size and popular commercial fish throughout their range in area. 54 specimens of silver sillago were collected occasionally from August 2015 to January 2016 by cast net (Mesh size: 10 mm) and beach seine (Mesh size: 15 mm); in four locations from east to west along northern Persian Gulf coast of Iran; Bandar"=abbas (27\textdegree{}10'N, 56\textdegree{}20'E) Kangan (27\textdegree{}50'N, 52\textdegree{}03'E), Dayer (27\textdegree{}50'N, 51\textdegree{}56'E) and Bushehr beaches (29\textdegree{}00'N, 50\textdegree{}50'E). Specimens assessed for length and width of sagittal otoliths, TL (cm) and weight (gr) of fish. Total length (TL) and otolith (SL) Measurements were obtained with a Digital caliper to an accuracy of \mbox{0.01\,cm} and measurements of body weight (BW) were made by using a digital scale to an accuracy of 0.1 g. T-test revealed no significance difference ($p > 0.05$) between left and right otolith characters. Range of Total length and weight of specimens were 10.72--\mbox{29.06\,cm} and 7.0--77.6 gr. linear regression relationship with high coefficient of determination appeared for length and width of otoliths with Total Length (TL) of fish specimens. Relationships were TL (mm) = otolith length (mm) $\times$ 23.8--18.9 and TL (mm) = otolith width (mm) $\times$ 23.96--20.74, Coefficient determinations of relationships were 0.882 and 0.811 respectively. Also exponential relationship between fish weight and otolith size was appeared as fish weight (gr) = 0.061 $\times$ otolith length 3.181 with coefficient determination of 0.905. Result showed that estimation of Silver sillago size and weight with good accuracy is possible by using otoliths size parameters and these data could be useful in study of ecology, population dynamic and resources of this species.}

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\noindent \textbf{Keywords:} Otolith, sagittal otolith, sillaginidae
\index[key]{Otolith}
\index[key]{Sagittal otolith}
\index[key]{Sillaginidae}
\end{document}
