Seasonal changes in the gonadal state of the oysters Crassostrea iridescens and Crassostrea corteziensis (Filibranchia: Ostreidae) in the Northwest coast of México.
Seasonal changes in the gonadal state of the oysters Crassostrea iridescens and Crassostrea corteziensis (Filibranchia: Ostreidae) in the Northwest coast of México.
| dc.creator | Frías-Espericueta, Martín G. | |
| dc.creator | Páez-Osuna, Federico | |
| dc.creator | Osuna-López, J. Isidro | |
| dc.date | 1997-09-01 | |
| dc.date.accessioned | 2023-08-03T18:25:15Z | |
| dc.date.available | 2023-08-03T18:25:15Z | |
| dc.identifier | https://revistas.ucr.ac.cr/index.php/rbt/article/view/32118 | |
| dc.identifier | 10.15517/rbt.v45i3.32118 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/7900909 | |
| dc.description | The reproductive cycle in oysters has been the subject of several studies in temperate zones. However, little information is available for tropical and subtropical species. This study describes the seasonal changes in the gonadic index (GI) of two species of oysters, Crassostrea iridescens and Crassostrea corteziensis, which differ markedly in their hàbitad and time of reproduction. Both oysters were sampled at 45 days intervals in the Northwest coast of Mexico between November 1989 and October 1990. Gonadal and somatic tissue per individual were dried for three days at 90°C, weighed and recorded. The gonadic index (GI) applied in this work was calculated from: GI = Wg/ws. Were WG is the average gonadal tissue dry weight, and Ws is the average somatic tissue dry weight. Seasonal variations in the gonadal state were evident for the two species. C.iridescens exhibited only a single maximum in the year, while C. corteziensis two peaks. This situation is presumably related to the contrastable environmental conditions that prevail in the sites where each species inhabit. | en-US |
| dc.description | El ciclo reproductivo en ostras ha sido objeto de varios estudios en zonas templada. Si embargo, poca información está disponible para especies tropicales y subtropicales. Este estudio describe los cambios estacionales en el ídice gonádico (GI) de dos especies de ostras, Crassostrea iridescens y Crassostrea corteziensis, la cuaes diferen signifcativamnte en su hábitat y tiempo de reproducción. Abas ostras fueron muestradas a intervalos de 45 días cada uno en la costa noroeste de México entre noviembre de 1989 y octubre de 1990. El tejido gonádico y somático por organismo fue secado por tes días a 90·c, pesados y registrados. El índice gonádico (GI) usado en este trabao fue calculado de: Gl= Wg/ws. Donde Wg es el peso seco promedio del tejido gonáico, y Ws el peso seco promedio del tejido somáico. Las varaciones estacionaes en el estado gonádico feron evidentes para las dos especies. C iridescens presentó sólo un máximo en el año, mientra que C. corteziensis presentó dos máximos. Posiblemente esta situación es relacionada con las contrastables condicones ambíentales que prevalecen donde cada especie habita. | es-ES |
| dc.format | application/pdf | |
| dc.language | eng | |
| dc.publisher | Universidad de Costa Rica | en-US |
| dc.relation | https://revistas.ucr.ac.cr/index.php/rbt/article/view/32118/31779 | |
| dc.rights | Derechos de autor 1997 Revista de Biología Tropical | es-ES |
| dc.rights | http://creativecommons.org/licenses/by/4.0 | es-ES |
| dc.source | Revista de Biología Tropical; Vol. 45 No. 3 (1997): Volume 45 – Regular number 3 – September 1997; 1061–1065 | en-US |
| dc.source | Revista de Biología Tropical; Vol. 45 Núm. 3 (1997): Volumen 45 – Volumen regular 3 – Setiembre 1997; 1061–1065 | es-ES |
| dc.source | Revista Biología Tropical; Vol. 45 N.º 3 (1997): Volumen 45 – Volumen regular 3 – Setiembre 1997; 1061–1065 | pt-PT |
| dc.source | 2215-2075 | |
| dc.source | 0034-7744 | |
| dc.subject | C.iridescens | en-US |
| dc.subject | C. corteziensis | en-US |
| dc.subject | reproductive cycle | en-US |
| dc.subject | temperature | en-US |
| dc.subject | oyster. | en-US |
| dc.title | Seasonal changes in the gonadal state of the oysters Crassostrea iridescens and Crassostrea corteziensis (Filibranchia: Ostreidae) in the Northwest coast of México. | en-US |
| dc.title | Seasonal changes in the gonadal state of the oysters Crassostrea iridescens and Crassostrea corteziensis (Filibranchia: Ostreidae) in the Northwest coast of México. | es-ES |
| dc.type | info:eu-repo/semantics/article | |
| dc.type | info:eu-repo/semantics/publishedVersion | |
| dc.type | Article | en-US |