TY - JOUR T1 - Some properties reproductive of the speckled shrimp (Metapenaeus monoceros Fabricius, 1798) in the North-eastern Mediterranean TT - JF - IFRO JO - IFRO VL - 14 IS - 2 UR - http://jifro.ir/article-1-760-en.html Y1 - 2015 SP - 485 EP - 493 KW - Shrimp KW - Reproduction KW - Size at first maturity KW - Mediterranean Sea N2 - Speckled shrimp (Metapenaeus monoceros), is a commercially important prawn in the embayments and estuaries of the Mediterranean Sea. It is originally a Lessepsian species which had migrated from the Red Sea into the Mediterranean Sea through the Suez Canal. This study was carried out in the North-eastern Mediterranean Sea between November 2009 and October 2010 with monthly sampling of speckled shrimps, by bottom trawl operations. Totally 784 specimens of this shrimp were studied, and the male/female ratio was determined as 1:1.4. The minimum size at first maturity for females was measured as 74 mm TL, and 50% of the female population were mature at about 110 mm (TL50%). It was also determined that female shrimps had developed their eggs between June to October, with two peak spawning periods between June-July, and August and October. M3 ER -