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 ...

In most organisms, transitions between different life-history stages occur later and at smaller sizes as growth conditions deteriorate. Day and Rowe recently proposed that this pattern could be explained by the existence of developmental thresholds (minimum sizes or levels of condition below which transitions are unable to proceed). The developmental-threshold model predicts that the reaction n...

This work provides information on Mugilidae fish reproduction in Grand-Lahou lagoon. From September 2009 to August 2011, for each specimen sampled, the total length cm, mass and eviscerated g, gonads cg, sex maturity stages were recorded. Parameters studied size at first sexual maturity, period ratio. The is reached between 16.1 cm 21.0 four of five species 41.6 Mugil cephalus females. Liza dum...

Heibo, E. 2003. Life-history variation and age at maturity in Eurasian Perch (Perca fluviatilis L.) This thesis deals with life-history variation in perch, with special focus on age at maturity. We conducted field studies to uncover the variation within short geographic distances and a literature review to study variation on a large geographic scale in order to reveal some factors affecting lif...

Social conditions experienced prior to sexual maturity influence reproduction later in life in many animals. In simultaneous hermaphrodites variation in mating group size influences reproductive investment. As the mating group size increases, reproductive resources devoted to the female function decrease in favor of the male function. Prior to sexual maturity many hermaphrodites have a protandr...