Frond elongation rates of Macrocystis pyrifera (L.) AG. at Bahía Tortugas, Baja California Sur, Mexico
Growth rates of Macrocystis pyrifera fronds were measured in a control and a harvested bed in Bahía Tortugas, BCS. Measurements were taken every third day for the first 15 days after tagging and once again after 100 days. Growth rate in the control bed, as a function of frond length, follows a logar...
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Iniversidad Autónoma de Baja California
1996
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| Acceso en línea: | https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/834 |
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Hernández-Carmona, G |
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Hernández-Carmona, G Frond elongation rates of Macrocystis pyrifera (L.) AG. at Bahía Tortugas, Baja California Sur, Mexico |
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Hernández-Carmona, G |
| author_sort |
Hernández-Carmona, G |
| title |
Frond elongation rates of Macrocystis pyrifera (L.) AG. at Bahía Tortugas, Baja California Sur, Mexico |
| title_short |
Frond elongation rates of Macrocystis pyrifera (L.) AG. at Bahía Tortugas, Baja California Sur, Mexico |
| title_full |
Frond elongation rates of Macrocystis pyrifera (L.) AG. at Bahía Tortugas, Baja California Sur, Mexico |
| title_fullStr |
Frond elongation rates of Macrocystis pyrifera (L.) AG. at Bahía Tortugas, Baja California Sur, Mexico |
| title_full_unstemmed |
Frond elongation rates of Macrocystis pyrifera (L.) AG. at Bahía Tortugas, Baja California Sur, Mexico |
| title_sort |
frond elongation rates of macrocystis pyrifera (l.) ag. at bahía tortugas, baja california sur, mexico |
| description |
Growth rates of Macrocystis pyrifera fronds were measured in a control and a harvested bed in Bahía Tortugas, BCS. Measurements were taken every third day for the first 15 days after tagging and once again after 100 days. Growth rate in the control bed, as a function of frond length, follows a logarithmic relation, with maximum values in winter and minimum in summer. This pattern was consistent with the 100-day average growth rate, which varied from 12.8 cm/day in summer to 20.8 cm/day in winter. No significant difference was found in the percentage daily growth rate (E), ranging from 5.4% (spring) to 8.5% (winter). The standard growth rate (G) was not significantly different either, varying from 5.3% (spring) to 8.8% (winter), and the data obtained for average growth over 15 and 100 days were used to determine the seasonal variation, which is related to ambient temperature and nutrient availability. No adverse effects were found due to the experimental harvest, but the logarithmic relation changed to a linear one in spring and fall. Maximum values were also found in winter and autumn, with minimum values in spring and summer in both the 15 and 100-day average growth rates; average growth values after 100 days varied from 14.7 cm/day (spring) to 23.3 cm/day (winter). The E values ranged from 6.3% (spring) to 7.2% (winter). The G values varied from 6.9% (winter) to 10.1% (spring) and were significantly greater than those of the control bed. Considering the data obtained in this study, I suggest future experiments to validate the results in order to propose additional regulations for sustaining the harvest of the M. pyrifera kelp beds in the southern region of their distribution in Mexico. |
| publisher |
Iniversidad Autónoma de Baja California |
| publishDate |
1996 |
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https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/834 |
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1715724017225170944 |
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oai:cienciasmarinas.com.mx:article-8342019-06-13T17:00:23Z Frond elongation rates of Macrocystis pyrifera (L.) AG. at Bahía Tortugas, Baja California Sur, Mexico Tasas de elongación de frondas de Macrocystis pyrifera (L.) AG. en Bahía Tortugas, Baja California Sur, México Hernández-Carmona, G Macrocystis pyrifera fronds elongation harvest Bahía Tortugas Macrocystis pyrifera frondas elongación cosecha Bahía Tortugas Growth rates of Macrocystis pyrifera fronds were measured in a control and a harvested bed in Bahía Tortugas, BCS. Measurements were taken every third day for the first 15 days after tagging and once again after 100 days. Growth rate in the control bed, as a function of frond length, follows a logarithmic relation, with maximum values in winter and minimum in summer. This pattern was consistent with the 100-day average growth rate, which varied from 12.8 cm/day in summer to 20.8 cm/day in winter. No significant difference was found in the percentage daily growth rate (E), ranging from 5.4% (spring) to 8.5% (winter). The standard growth rate (G) was not significantly different either, varying from 5.3% (spring) to 8.8% (winter), and the data obtained for average growth over 15 and 100 days were used to determine the seasonal variation, which is related to ambient temperature and nutrient availability. No adverse effects were found due to the experimental harvest, but the logarithmic relation changed to a linear one in spring and fall. Maximum values were also found in winter and autumn, with minimum values in spring and summer in both the 15 and 100-day average growth rates; average growth values after 100 days varied from 14.7 cm/day (spring) to 23.3 cm/day (winter). The E values ranged from 6.3% (spring) to 7.2% (winter). The G values varied from 6.9% (winter) to 10.1% (spring) and were significantly greater than those of the control bed. Considering the data obtained in this study, I suggest future experiments to validate the results in order to propose additional regulations for sustaining the harvest of the M. pyrifera kelp beds in the southern region of their distribution in Mexico. Se midió la tasa de crecimiento de frondas de Macrocystis pyrifera en un manto testigo y otro cosechado trimestralmente, en bahía Tortugas, BCS. Las mediciones se realizaron cada tercer día durante los primeros 15 días de marcadas y se realizó una última medición después de 100 días de crecimiento (estacional). En el manto testigo, la tasa de elongación en función de la longitud de las frondas presentó una tendencia logarítmica, con valores mínimos en verano y máximos en invierno. Este patrón fue consistente con el promedio de crecimiento después de 100 días, variando de 12.8 cm/día en verano a 20.8 cm/día en invierno. No se encontró diferencia significativa en los valores de porcentaje diario de elongación (E), variando de 5.4% (primavera) a 8.5% (invierno). Los valores de la tasa estándar de elongación (G) tampoco fueron significativamente diferentes, variando de 5.3% (primavera) a 8.8% (invierno), por lo que se consideraron los datos del análisis del crecimiento a los 15 y 100 días para establecer la variación estacional, la cual se relaciona con los parámetros de temperatura y concentración de nutrientes. No se encontraron efectos adversos sobre las plantas de M. pyrifera debido a la cosecha del manto experimental, aunque cambió la tendencia de logarítmica a lineal en el crecimiento de primavera y otoño, y se mantuvieron los valores mínimos en invierno y otoño y mínimos en primavera y verano, tanto en el análisis de los primeros 15 días como en el de los 100 días; los promedios fluctuaron entre 14.7 cm/día (primavera) y 23.3 cm/día (invierno). Los valores de E fluctuaron de 6.3% (primavera) a 7.2% (invierno) y los valores de G variaron entre 6.9% (invierno) y 10.1% (primavera), siendo significativamente mayores que los del manto testigo. Con base en los datos obtenidos, se sugieren futuros experimentos para validar los resultados y poder proponer medidas adicionales para la regulación de la cosecha sustentable de los mantos de M. pyrifera al sur de su distribución geográfica en México. 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/834 10.7773/cm.v22i1.834 Ciencias Marinas; Vol. 22 No. 1 (1996); 57-72 Ciencias Marinas; Vol. 22 Núm. 1 (1996); 57-72 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/834/758 |
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