Abundance and reproduction of brown pelican (Pelecanus occidentalis) in two bays in the Mexican central Pacific
The abundance and reproduction of the brown pelican (Pelecanus occidentalis) was studied in two bays of the Mexican Central Pacific, Bahía de Navidad and Bahía Chamela, located in the coast of Jalisco, Mexico. The number of brown pelicans in both bays was registered from December 2007 to November 20...
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| Formaat: | Online |
| Taal: | spa |
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Instituto de Ecología, A.C.
2011
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| Online toegang: | https://azm.ojs.inecol.mx/index.php/azm/article/view/752 |
| _version_ | 1799770092376948736 |
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| author | Hernández-Vázquez, Salvador Iñigo-Elias, Eduardo Hinojosa Larios, J. Ángel Durand Martínez, Braulio Rojo-Vázquez, J. A. Valadez González, Carmen |
| author_facet | Hernández-Vázquez, Salvador Iñigo-Elias, Eduardo Hinojosa Larios, J. Ángel Durand Martínez, Braulio Rojo-Vázquez, J. A. Valadez González, Carmen |
| author_sort | Hernández-Vázquez, Salvador |
| collection | AZM |
| description | The abundance and reproduction of the brown pelican (Pelecanus occidentalis) was studied in two bays of the Mexican Central Pacific, Bahía de Navidad and Bahía Chamela, located in the coast of Jalisco, Mexico. The number of brown pelicans in both bays was registered from December 2007 to November 2009, as well as the number of nests, eggs and nestlings in the Cocinas Island. The superficial temperature of the water, the nutrients (NO2 -, NO3-, NH4 + y PO4 -) and the primary productivity (clorofile a) were measured on a monthly basis. The greater number of pelicans was registered from January to March, in both bays. There were a bigger number of birds in the Chamela bay, mainly in early 2009. The reproductive period of the brown pelican extended from December to July on both years. The largest number of nests was observed in March and April, with an estimate of 480 (90.7 nests/hectares) in the whole nesting season of 2008 and 1,200 (226.8 nests/hectares) in 2009. In 2008 there were an estimate 1,310 eggs and 800 nestlings, while in 2009 there were an estimate 3,348 eggs and 2,200 nestlings. Both, the highest number of birds, as well as the highest number of nests, eggs and nestlings registered in 2009 were present when the temperature of the water registered its lowest values and the primary productivity (clorofile a) and nutrients, mainly NO3 - and PO4 -, registered their highest levels. These variables have a direct effect in the concentration of a larger number of fish. |
| format | Online |
| id | azm-article-752 |
| institution | Acta Zoológica Mexicana |
| language | spa |
| publishDate | 2011 |
| publisher | Instituto de Ecología, A.C. |
| record_format | ojs |
| spelling | azm-article-7522022-07-13T01:40:42Z Abundance and reproduction of brown pelican (Pelecanus occidentalis) in two bays in the Mexican central Pacific Abundancia y reproducción del pelícano pardo (Pelecanus occidentalis) en dos pequeñas bahías del Pacífico central, México Hernández-Vázquez, Salvador Iñigo-Elias, Eduardo Hinojosa Larios, J. Ángel Durand Martínez, Braulio Rojo-Vázquez, J. A. Valadez González, Carmen Pelecanus occidentalis abundance reproduction temperature nutrients primary productivity Jalisco Mexico Pelecanus occidentalis abundancia reproducción temperatura nutrientes productividad primaria Jalisco México The abundance and reproduction of the brown pelican (Pelecanus occidentalis) was studied in two bays of the Mexican Central Pacific, Bahía de Navidad and Bahía Chamela, located in the coast of Jalisco, Mexico. The number of brown pelicans in both bays was registered from December 2007 to November 2009, as well as the number of nests, eggs and nestlings in the Cocinas Island. The superficial temperature of the water, the nutrients (NO2 -, NO3-, NH4 + y PO4 -) and the primary productivity (clorofile a) were measured on a monthly basis. The greater number of pelicans was registered from January to March, in both bays. There were a bigger number of birds in the Chamela bay, mainly in early 2009. The reproductive period of the brown pelican extended from December to July on both years. The largest number of nests was observed in March and April, with an estimate of 480 (90.7 nests/hectares) in the whole nesting season of 2008 and 1,200 (226.8 nests/hectares) in 2009. In 2008 there were an estimate 1,310 eggs and 800 nestlings, while in 2009 there were an estimate 3,348 eggs and 2,200 nestlings. Both, the highest number of birds, as well as the highest number of nests, eggs and nestlings registered in 2009 were present when the temperature of the water registered its lowest values and the primary productivity (clorofile a) and nutrients, mainly NO3 - and PO4 -, registered their highest levels. These variables have a direct effect in the concentration of a larger number of fish. La abundancia y reproducción del pelícano pardo (Pelecanus occidentalis) se estudió en dos bahías del pacífico central Mexicano, Bahía de Navidad y Bahía Chamela, ubicadas en la costa de Jalisco. De diciembre de 2007 a noviembre de 2009 se registró mensualmente el número de pelícanos pardos en ambas bahías, así como el número de nidos, huevos y pollos en la isla Cocinas. Se midió mensualmente la temperatura superficial del agua, nutrientes (NO2 -, NO3 -, NH4 + y PO4 -) y la productividad primaria (clorofila a). El mayor número de pelícanos se registró de enero a marzo, en ambas bahías. Hubo una mayor abundancia de aves en la Bahía Chamela, principalmente a principios de 2009. El período reproductivo del pelícano pardo se extendió de diciembre a julio en los dos años. El mayor número de nidos se observó en marzo y abril, con un estimado de 480 (90.7 nidos/hectárea) en toda la temporada de anidación del 2008, y de 1,200 (226.8 nidos/hectárea) en 2009. En 2008 se estimaron 1,310 huevos y 800 pollos, mientras que en 2009 se estimaron 3,348 huevos y 2,200 pollos. Tanto el número de aves, como el número de nidos, huevos y pollos registrados en 2009 fueron mayores cuando la temperatura del agua registró sus valores más bajos y la productividad primaria (clorofila a) y nutrientes, principalmente NO3 - y PO4 - más altos. Estas variables tienen un efecto directo en la concentración de un mayor número de peces. Instituto de Ecología, A.C. 2011-08-15 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Original articles Artículos originales application/pdf https://azm.ojs.inecol.mx/index.php/azm/article/view/752 10.21829/azm.2011.272752 ACTA ZOOLÓGICA MEXICANA (N.S.); Vol. 27 No. 2 (2011); 257-271 ACTA ZOOLÓGICA MEXICANA (N.S.); Vol. 27 Núm. 2 (2011); 257-271 2448-8445 0065-1737 spa https://azm.ojs.inecol.mx/index.php/azm/article/view/752/919 Derechos de autor 2011 ACTA ZOOLÓGICA MEXICANA (N.S.) http://creativecommons.org/licenses/by-nc-sa/4.0 |
| spellingShingle | Hernández-Vázquez, Salvador Iñigo-Elias, Eduardo Hinojosa Larios, J. Ángel Durand Martínez, Braulio Rojo-Vázquez, J. A. Valadez González, Carmen Abundance and reproduction of brown pelican (Pelecanus occidentalis) in two bays in the Mexican central Pacific |
| title | Abundance and reproduction of brown pelican (Pelecanus occidentalis) in two bays in the Mexican central Pacific |
| title_full | Abundance and reproduction of brown pelican (Pelecanus occidentalis) in two bays in the Mexican central Pacific |
| title_fullStr | Abundance and reproduction of brown pelican (Pelecanus occidentalis) in two bays in the Mexican central Pacific |
| title_full_unstemmed | Abundance and reproduction of brown pelican (Pelecanus occidentalis) in two bays in the Mexican central Pacific |
| title_short | Abundance and reproduction of brown pelican (Pelecanus occidentalis) in two bays in the Mexican central Pacific |
| title_sort | abundance and reproduction of brown pelican (pelecanus occidentalis) in two bays in the mexican central pacific |
| url | https://azm.ojs.inecol.mx/index.php/azm/article/view/752 |
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