en Fish processing Fish processing پژوهشي Orginal research papers <span lang="EN-GB" style="font-size:11.0pt"><span calibri="" style="font-family:"><span style="color:black">This study investigated the seasonal variation in the nutrient composition of four groups (with different average weights) of cultured olive flounder (<i>Paralichthys olivaceus</i>) to determine the optimal season and harvest size. The yield of 1 kg olive flounder did not vary throughout the seasons. The texture of the muscle tissue, levels of crude lipids, and vitamin E content in the 1 kg fish were highest in April and lowest in August. However, the levels in the 2, 3, and 4 kg fish were lowest in April, during the reproductive period, and highest in December. The vitamin E content in the fish muscle may correspond with high levels of crude lipids, possibly influenced by the spawning period. The 4 kg group had lower levels of crude lipid, texture, and vitamin E content than other fish, potentially owing to repeated spawning. The optimal harvest size for olive flounder was 3 kg based on nutrient evaluation.</span></span></span> Oliv flounder, Texture, Seasonal variation, Vitamin A, Vitamin E 603 618 http://jifro.ir/browse.php?a_code=A-10-2837-3&slc_lang=en&sid=1 K.B. Shim kilbo1221@korea.kr 100319475328460056762 100319475328460056762 Yes National Institute of Fisheries Science N.Y. Yoon dbssud@korea.kr 100319475328460056763 100319475328460056763 No National Institute of Fisheries Science H.C. Kim hckimgnu@korea.kr 100319475328460056764 100319475328460056764 No National Institute of Fisheries Science