This book contributes to the understanding of the reproductive biology of Trachurus trachurus from the Algerian west coast and highlights the importance of fecundity in maintaining fish populations. It aims to provide valuable information for fisheries managers, scientists, fishing industry players and all those interested in the preservation of marine ecosystems and the sustainability of fishery resources. This book aims to broaden our knowledge of the fecundity of T. trachurus and to stimulate further research in this field. By understanding the reproductive mechanisms of this keystone species, it becomes possible to more accurately assess and predict variations in coastal fish populations, which is essential for ensuring the stability of marine ecosystems. It's time to deepen our understanding of this species' fecundity and take concrete steps to protect this vital species. On the following pages, we invite you to explore the exciting discoveries about the fecundity of T. trachurus. Happy reading!