Maturation-related variations in prostaglandin and fatty acid content of ovary in the kuruma prawn ( Marsupenaeus japonicus)

• Published in: Comparative biochemistry and physiology. Part A, Molecular & integrative physiology Vol. 137; no. 4; pp. 631 - 637
• Main Authors: Tahara, Daisuke, Yano, Isao
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01.04.2004
• Subjects: animal reproduction; Animals; Arachidonic acid; Arachidonic Acid - analysis; Arachidonic Acid - biosynthesis; Decapod; Dinoprost - analysis; Dinoprost - biosynthesis; Dinoprostone - analysis; Dinoprostone - biosynthesis; fatty acid composition; Fatty Acids, Unsaturated - analysis; Fatty Acids, Unsaturated - metabolism; Female; Highly unsaturated fatty acids; Lipid; lipids; Marine; Marsupenaeus japonicus; ovarian development; Ovarian maturation; ovaries; Ovary - growth & development; Ovary - metabolism; Penaeidae; Penaeidae - growth & development; Penaeidae - metabolism; Prawn; Prostaglandins; Prostaglandins - metabolism; Radioimmunoassay; shrimp; unsaturated fatty acids; Prostaglandins; Decapod; Ovarian maturation; Radioimmunoassay; Highly unsaturated fatty acids; Prawn; Arachidonic acid; Lipid
• ISSN: 1095-6433; 1531-4332
• DOI: 10.1016/j.cbpb.2003.12.005

Total lipid, fatty acids and prostaglandins (PGF 2α and PGE 2) in the ovary of kuruma prawns ( Marsupenaeus japonicus) were measured during ovarian development. The level of ovarian total lipid increased with an increase in the gonad-somatic index (GSI). No significant difference was found in fatty acid composition among different stages of ovarian development. However, the content of arachidonic acid (precursor of PG 2), but not eicosapentanoic acid (precursor of PG 3), was significantly lower at stages I and II than at stage V ( P<0.01). When ovarian PGF 2α and PGE 2 levels were plotted against GSI, no correlation was found in either PG. However, in terms of ovarian developmental stages, the level of ovarian PGs was high (approx. 20 pg/mg) at stage I, followed by marked decreases at stages IV and V (PGF 2α, P<0.01) and stage IV (PGE 2, P<0.01). These results suggest that ovarian PGs and arachidonic acid are deeply involved in ovarian maturation in kuruma prawns.