Size structure and reproduction of Gefidium robusturn (Rhodophyta) in the central part of the Baja California peninsula, Mexico
The size structure and reproduction of Gelidium robustum were studied at Punta San Hipólito at 6 m depth, and at Isla Natividad at 8 and I5 m depth. Both sites are located on the Pacific coast of Baja California Sur, Mexico. Vegetative reproduction was greater, but average frond size was smaller at...
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Iniversidad Autónoma de Baja California
1996
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oai:cienciasmarinas.com.mx:article-8782019-05-29T19:57:48Z Size structure and reproduction of Gefidium robusturn (Rhodophyta) in the central part of the Baja California peninsula, Mexico Estructura de tallas y reproducción de Gelidium robustum (Rhodophyta) en la parte central de la península de Baja California, México Espinoza-Avalos, J Gelidium size carposporic tetrasporic minimum reproductive size Mexico Gelidium talla carpospórica tetraspórica tamaño mínimo de reproducción México The size structure and reproduction of Gelidium robustum were studied at Punta San Hipólito at 6 m depth, and at Isla Natividad at 8 and I5 m depth. Both sites are located on the Pacific coast of Baja California Sur, Mexico. Vegetative reproduction was greater, but average frond size was smaller at the two shallow sites than at 15 m. The degree of reproduction by sporophytes was directly related to frond size and occurred year-round. Tetrasporic fronds outnumbered carposporic ones. Carposporic fronds were less abundant at 15 m depth than at 6 and 8 m, and were shorter, on average, than tetrasporic fronds at all sites. The minimum reproductive size was also smaller for carposporic fronds than for tetrasporic fronds. The minimum reproductive size of tetrasporic fronds was smaller at Punta San Hipolito (7.4 cm), followed by Isla Natividad 8-m fronds (16.5 cm) and Isla Natividad 15-m fronds (22.8 cm). It is thought that maintaining the rhizoidal part of a plant with the associated juvenile fronds (less than IO cm in length) is very important for the recovery of a bed after harvesting. Se estudió la estructura de tallas y reproducción de Gelidium robustum en Punta San Hipólito, a 6 m de profundidad, y en Isla Natividad, Baja California Sur, México, a 8 y 15 m de profundidad. La reproducción vegetativa fue mayor y la talla promedio fue menor en los dos sitios someros que a 15 m en Isla Natividad. La reproducción esporofítica se presentó a lo largo del año y se incrementó directamente con la talla de frondas. Existió una dominancia numérica de las frondas tetraspóricas con respecto a las carpospóricas. Las frondas carpospóricas se presentaron en menor número a 15 m de profundidad que a 6 y 8 m de profundidad y fueron de menor talla que las tetraspóricas: La talla mínima de reproducción de las frondas carpospóricas también fue menor que las tetraspóricas. La talla mínima de reproducción de las frondas tetraspóricas fue menor en Punta San Hipólito (7.4 cm), seguida por las de Isla Natividad a 8 m (16.5 cm) y I5 m (22.8 cm) de profundidad. Se considera muy importante no cortar 1os rizoides de una planta junto con las frondas juveniles asociadas (menores de 10 cm), para que promuevan la recuperación del manto después de cosecharlo. Iniversidad Autónoma de Baja California 1996-03-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/878 10.7773/cm.v22i4.878 Ciencias Marinas; Vol. 22 No. 4 (1996); 415-426 Ciencias Marinas; Vol. 22 Núm. 4 (1996); 415-426 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/878/800 |
| institution |
Ciencias Marinas |
| collection |
OJS |
| language |
eng |
| format |
Online |
| author |
Espinoza-Avalos, J |
| spellingShingle |
Espinoza-Avalos, J Size structure and reproduction of Gefidium robusturn (Rhodophyta) in the central part of the Baja California peninsula, Mexico |
| author_facet |
Espinoza-Avalos, J |
| author_sort |
Espinoza-Avalos, J |
| title |
Size structure and reproduction of Gefidium robusturn (Rhodophyta) in the central part of the Baja California peninsula, Mexico |
| title_short |
Size structure and reproduction of Gefidium robusturn (Rhodophyta) in the central part of the Baja California peninsula, Mexico |
| title_full |
Size structure and reproduction of Gefidium robusturn (Rhodophyta) in the central part of the Baja California peninsula, Mexico |
| title_fullStr |
Size structure and reproduction of Gefidium robusturn (Rhodophyta) in the central part of the Baja California peninsula, Mexico |
| title_full_unstemmed |
Size structure and reproduction of Gefidium robusturn (Rhodophyta) in the central part of the Baja California peninsula, Mexico |
| title_sort |
size structure and reproduction of gefidium robusturn (rhodophyta) in the central part of the baja california peninsula, mexico |
| description |
The size structure and reproduction of Gelidium robustum were studied at Punta San Hipólito at 6 m depth, and at Isla Natividad at 8 and I5 m depth. Both sites are located on the Pacific coast of Baja California Sur, Mexico. Vegetative reproduction was greater, but average frond size was smaller at the two shallow sites than at 15 m. The degree of reproduction by sporophytes was directly related to frond size and occurred year-round. Tetrasporic fronds outnumbered carposporic ones. Carposporic fronds were less abundant at 15 m depth than at 6 and 8 m, and were shorter, on average, than tetrasporic fronds at all sites. The minimum reproductive size was also smaller for carposporic fronds than for tetrasporic fronds. The minimum reproductive size of tetrasporic fronds was smaller at Punta San Hipolito (7.4 cm), followed by Isla Natividad 8-m fronds (16.5 cm) and Isla Natividad 15-m fronds (22.8 cm). It is thought that maintaining the rhizoidal part of a plant with the associated juvenile fronds (less than IO cm in length) is very important for the recovery of a bed after harvesting. |
| publisher |
Iniversidad Autónoma de Baja California |
| publishDate |
1996 |
| url |
https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/878 |
| _version_ |
1715724022801498112 |
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