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Influence of environmental variables and reproduction on the gonadal fatty acid profile of tropical scallop Nodipecten nodosus.
Comp Biochem Physiol B Biochem Mol Biol. 2010 Dec; 157(4):408-14.CB

Abstract

We examined the influence of the reproductive cycle and environmental variables on the gonadal fatty acid profile in the tropical scallop Nodipecten nodosus. Individuals from a natural population in north-eastern Venezuela (Caribbean Sea) were sampled monthly during one year. The gonadosomatic index (GSI) and a visual assessment of gonadic status are also reported. The environmental conditions characterized by chlorophyll a, temperature and seston concentration were measured in parallel. The highest reproductive activity, with a GSI of 13-18%, was observed from November 2003 to April 2004, and a decrease in GSI, taken as an indication of three spawning periods, was recorded in October, January and May-June. The GSI was 5-8% outside these intervals. A similar trend was observed in maturity stage frequency. Statistical analysis (MDS-ANOSIM) established two different periods; one dominated by upwelling (January to July) and the other characteristic of non-upwelling conditions (August to December). The fatty acids 16:0, 22:6n-3, 20:5n-3 and 16:1n-7 were responsible for the differences between two periods and explained 50% of the observed variance. Accordingly, during the upwelling period, fatty acids such as 22:6n-3 were positively correlated with temperature, organic seston and bivalves in the spent sexual stage and inversely related to the GSI. Furthermore, individuals in the ripe sexual stage were positively related to 20:5n-3 and 18:3n-3, whereas chlorophyll a was directly related to 18:1n-7 and 16:1n-7. In the non-upwelling period, a significant and positive correlation was obtained between fatty acids such as 20:5n-3 and 22:6n-3 and the GSI and the bivalves in the ripe sexual stage, whereas these acids were inversely correlated with the spent sexual stage. In addition, chlorophyll a was positively related to 18:1n-9 and 18:2n-6. Changes in the gonadal fatty acid profile of N. nodosus were influenced by the environmental variables (exogenous factors) during the upwelling and non-upwelling periods and by reproductions (endogenous factors).

Authors+Show Affiliations

Instituto Oceanográfico de Venezuela, Universidad de Oriente, Cumaná, Venezuela. lfreitesv@yahoo.esNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

20828631

Citation

Freites, Luis, et al. "Influence of Environmental Variables and Reproduction On the Gonadal Fatty Acid Profile of Tropical Scallop Nodipecten Nodosus." Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology, vol. 157, no. 4, 2010, pp. 408-14.
Freites L, García N, Troccoli L, et al. Influence of environmental variables and reproduction on the gonadal fatty acid profile of tropical scallop Nodipecten nodosus. Comp Biochem Physiol B, Biochem Mol Biol. 2010;157(4):408-14.
Freites, L., García, N., Troccoli, L., Maeda-Martínez, A. N., & Fernández-Reiriz, M. J. (2010). Influence of environmental variables and reproduction on the gonadal fatty acid profile of tropical scallop Nodipecten nodosus. Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology, 157(4), 408-14. https://doi.org/10.1016/j.cbpb.2010.09.001
Freites L, et al. Influence of Environmental Variables and Reproduction On the Gonadal Fatty Acid Profile of Tropical Scallop Nodipecten Nodosus. Comp Biochem Physiol B, Biochem Mol Biol. 2010;157(4):408-14. PubMed PMID: 20828631.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Influence of environmental variables and reproduction on the gonadal fatty acid profile of tropical scallop Nodipecten nodosus. AU - Freites,Luis, AU - García,Natividad, AU - Troccoli,Luis, AU - Maeda-Martínez,Alfonso N, AU - Fernández-Reiriz,María J, Y1 - 2010/09/07/ PY - 2010/06/02/received PY - 2010/08/30/revised PY - 2010/09/02/accepted PY - 2010/9/11/entrez PY - 2010/9/11/pubmed PY - 2010/12/16/medline SP - 408 EP - 14 JF - Comparative biochemistry and physiology. Part B, Biochemistry & molecular biology JO - Comp. Biochem. Physiol. B, Biochem. Mol. Biol. VL - 157 IS - 4 N2 - We examined the influence of the reproductive cycle and environmental variables on the gonadal fatty acid profile in the tropical scallop Nodipecten nodosus. Individuals from a natural population in north-eastern Venezuela (Caribbean Sea) were sampled monthly during one year. The gonadosomatic index (GSI) and a visual assessment of gonadic status are also reported. The environmental conditions characterized by chlorophyll a, temperature and seston concentration were measured in parallel. The highest reproductive activity, with a GSI of 13-18%, was observed from November 2003 to April 2004, and a decrease in GSI, taken as an indication of three spawning periods, was recorded in October, January and May-June. The GSI was 5-8% outside these intervals. A similar trend was observed in maturity stage frequency. Statistical analysis (MDS-ANOSIM) established two different periods; one dominated by upwelling (January to July) and the other characteristic of non-upwelling conditions (August to December). The fatty acids 16:0, 22:6n-3, 20:5n-3 and 16:1n-7 were responsible for the differences between two periods and explained 50% of the observed variance. Accordingly, during the upwelling period, fatty acids such as 22:6n-3 were positively correlated with temperature, organic seston and bivalves in the spent sexual stage and inversely related to the GSI. Furthermore, individuals in the ripe sexual stage were positively related to 20:5n-3 and 18:3n-3, whereas chlorophyll a was directly related to 18:1n-7 and 16:1n-7. In the non-upwelling period, a significant and positive correlation was obtained between fatty acids such as 20:5n-3 and 22:6n-3 and the GSI and the bivalves in the ripe sexual stage, whereas these acids were inversely correlated with the spent sexual stage. In addition, chlorophyll a was positively related to 18:1n-9 and 18:2n-6. Changes in the gonadal fatty acid profile of N. nodosus were influenced by the environmental variables (exogenous factors) during the upwelling and non-upwelling periods and by reproductions (endogenous factors). SN - 1879-1107 UR - https://www.unboundmedicine.com/medline/citation/20828631/Influence_of_environmental_variables_and_reproduction_on_the_gonadal_fatty_acid_profile_of_tropical_scallop_Nodipecten_nodosus_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S1096-4959(10)00222-8 DB - PRIME DP - Unbound Medicine ER -