Abundance estimation of Gigartina canaliculata Harvey, In San Quintin Bay, Baja California, Mexico

Abundance estimation of Gigartina canaliculata Harvey, In San Quintin Bay, Baja California, Mexico

Bimonthly samplings were carried out from March 1987 to January 1988 in San Quintín Bay, B.C., in order to determine the abundance of the alga Gigartina canaliculata Harvey (Bhodophyceae-Gigartinales). The highest biomass values obtained, expressed in dry weight, were 475 + 49 g/m2 in May, 545 ±88 g...

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Главные авторы: Ballesteros-Grijalva, G, Chauvet-Allard, G, Durazo-Beltrán, E
Формат: Online
Язык:eng
Опубликовано: Iniversidad Autónoma de Baja California 2021
Online-ссылка:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/792
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spelling oai:cienciasmarinas.com.mx:article-7922013-08-19T03:29:28Z Abundance estimation of Gigartina canaliculata Harvey, In San Quintin Bay, Baja California, Mexico Estimación de la abundancia de Gigartina canaliculata Harvey, en Bahía San Quintín, Baja California, México Ballesteros-Grijalva, G Chauvet-Allard, G Durazo-Beltrán, E Bimonthly samplings were carried out from March 1987 to January 1988 in San Quintín Bay, B.C., in order to determine the abundance of the alga Gigartina canaliculata Harvey (Bhodophyceae-Gigartinales). The highest biomass values obtained, expressed in dry weight, were 475 + 49 g/m2 in May, 545 ±88 g/m2 in July and 377 ± 47 g/m2 in September. Extrapolated to the total area of 400,000 m2, this represents 190 ± 19 tons, 218 ± 35 tons and 150 ± 19 tons, respectively. The lowest biomass value obtained was 120 ± 35 g/m2 in January, which extrapolated to the 400,000 m2, represents 48 ± 5.2 tons. The upwelling events that occur in San Quintín Bay at the end of spring and beginning of summer (Dawson, 1951; Alvarez-Borrego and Alvarez-Borrego, 1982) coincided with the highest biomass values recorded. The functional relation of wet weight versus dry weight had a regression coefficient r = 0.94 and was expressed by the equation y = 1.75 + 0.19 x. Sexual reproduction was maximum from September to January with 95% of the cystocarpic plants and minimum in May with 50%. The minimum reproduction in May and the highest percentage of sexually mature plants found during the autumn-winter season indicate a shift in the life cycle of G. canaliculata, caused in tum by a shift in seawater temperature which is controlled by upwelling events. The plants presented a quasi-homogeneous growth throughout the year (% proteins/% carbohydrates), with a growth index of 0.22-0.29 (0.29 corresponding to March). Se realizó un estudio con muestreos bimensuales desde marzo de 1987 hasta enero de 1988 en bahía San Quintín, B.C., en donde se determinó la abundancia del alga Gigartina canaliculata Harvey (Bhodophyceae-Gigartinales). Las mayores magnitudes de biomasa expresadas en peso seco, se obtuvieron durante los muestreos en los meses de mayo con 475 ± 49 g/m2, julio con 545 ± 88 g/m2 y septiembre con 377 + 47 g/m2; lo anterior extrapolado al área total de 400,000 m2, resultó en 190 ± 19 ton, 218 ± 35 ton y 150 ± 19 ton, respectivamente. La mínima biomasa se apreció en el muestreo del mes de enero con 120 ± 35 g/m2 y, que extrapolada a los 400,000 m2, representó 48 ± 5.2 ton. Los eventos de surgencias que se presentan a finales de primavera y principios de verano en bahía San Quintín (Dawson, 1951; Alvarez-Borrego y Alvarez-Borrego, 1982) coinciden con las máximas magnitudes de biomasa registradas. La relación funcional peso húmedo contra peso seco resultó con un coeficiente de regresión r = 0.94 y con una ecuación y = 1.75 + 0.19 x. La reproducción sexual es máxima de septiembre a enero con 95% de plantas cistocárpicas y la mínima se localizó en el mes de mayo con 50%. La reproducción mínima encontrada en el mes de mayo y el mayor porcentaje de plantas sexualmente maduras hacia las estaciones de otoño-invierno, nos muestran un corrimiento en el tiempo del ciclo de vida de G. canaliculata, provocado a su vez por un corrimiento de la temperatura del agua de mar la cual es controlada por los eventos de surgencias mencionadas en el párrafo anterior. Las plantas presentaron un crecimiento cuasi-homogéneo durante todo el año (%proteínas/% carbohidratos), con un índice de crecimiento de 0.22-0.29, en donde 0.29 corresponde al mes de marzo. Iniversidad Autónoma de Baja California 2021-02-22 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/792 10.7773/cm.v17i2.792 Ciencias Marinas; Vol. 17 No. 2 (1991); 99-108 Ciencias Marinas; Vol. 17 Núm. 2 (1991); 99-108 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/792/420420540 Copyright (c) 2021 Ciencias Marinas
institution Ciencias Marinas
collection OJS
language eng
format Online
author Ballesteros-Grijalva, G
Chauvet-Allard, G
Durazo-Beltrán, E
spellingShingle Ballesteros-Grijalva, G
Chauvet-Allard, G
Durazo-Beltrán, E
Abundance estimation of Gigartina canaliculata Harvey, In San Quintin Bay, Baja California, Mexico
author_facet Ballesteros-Grijalva, G
Chauvet-Allard, G
Durazo-Beltrán, E
author_sort Ballesteros-Grijalva, G
title Abundance estimation of Gigartina canaliculata Harvey, In San Quintin Bay, Baja California, Mexico
title_short Abundance estimation of Gigartina canaliculata Harvey, In San Quintin Bay, Baja California, Mexico
title_full Abundance estimation of Gigartina canaliculata Harvey, In San Quintin Bay, Baja California, Mexico
title_fullStr Abundance estimation of Gigartina canaliculata Harvey, In San Quintin Bay, Baja California, Mexico
title_full_unstemmed Abundance estimation of Gigartina canaliculata Harvey, In San Quintin Bay, Baja California, Mexico
title_sort abundance estimation of gigartina canaliculata harvey, in san quintin bay, baja california, mexico
description Bimonthly samplings were carried out from March 1987 to January 1988 in San Quintín Bay, B.C., in order to determine the abundance of the alga Gigartina canaliculata Harvey (Bhodophyceae-Gigartinales). The highest biomass values obtained, expressed in dry weight, were 475 + 49 g/m2 in May, 545 ±88 g/m2 in July and 377 ± 47 g/m2 in September. Extrapolated to the total area of 400,000 m2, this represents 190 ± 19 tons, 218 ± 35 tons and 150 ± 19 tons, respectively. The lowest biomass value obtained was 120 ± 35 g/m2 in January, which extrapolated to the 400,000 m2, represents 48 ± 5.2 tons. The upwelling events that occur in San Quintín Bay at the end of spring and beginning of summer (Dawson, 1951; Alvarez-Borrego and Alvarez-Borrego, 1982) coincided with the highest biomass values recorded. The functional relation of wet weight versus dry weight had a regression coefficient r = 0.94 and was expressed by the equation y = 1.75 + 0.19 x. Sexual reproduction was maximum from September to January with 95% of the cystocarpic plants and minimum in May with 50%. The minimum reproduction in May and the highest percentage of sexually mature plants found during the autumn-winter season indicate a shift in the life cycle of G. canaliculata, caused in tum by a shift in seawater temperature which is controlled by upwelling events. The plants presented a quasi-homogeneous growth throughout the year (% proteins/% carbohydrates), with a growth index of 0.22-0.29 (0.29 corresponding to March).
publisher Iniversidad Autónoma de Baja California
publishDate 2021
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/792
_version_ 1715724012129091584

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