Multiscale characterization of the sea temperature in an area of abalone banks (Haliotis spp.) at Bahia Asuncion, Baja California Sur, Mexico

Multiscale characterization of the sea temperature in an area of abalone banks (Haliotis spp.) at Bahia Asuncion, Baja California Sur, Mexico

The Baja California abalone is one of the most important Mexican fisheries because of its high economic value. Despite strong management efforts, this fishery has faced dramatic fluctuations attributed mainly to overfishing and variability of the marine climate. In this report we analyze sea tempera...

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Principais autores: Ponce-Díaz, G, Lluch-Cota, SE, Bautista-Romero, JJ, Lluch-Belda, D
Formato: Online
Idioma:eng
Publicado em: Iniversidad Autónoma de Baja California 2003
Acesso em linha:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/156
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id oai:cienciasmarinas.com.mx:article-156
record_format ojs
institution Ciencias Marinas
collection OJS
language eng
format Online
author Ponce-Díaz, G
Lluch-Cota, SE
Bautista-Romero, JJ
Lluch-Belda, D
spellingShingle Ponce-Díaz, G
Lluch-Cota, SE
Bautista-Romero, JJ
Lluch-Belda, D
Multiscale characterization of the sea temperature in an area of abalone banks (Haliotis spp.) at Bahia Asuncion, Baja California Sur, Mexico
author_facet Ponce-Díaz, G
Lluch-Cota, SE
Bautista-Romero, JJ
Lluch-Belda, D
author_sort Ponce-Díaz, G
title Multiscale characterization of the sea temperature in an area of abalone banks (Haliotis spp.) at Bahia Asuncion, Baja California Sur, Mexico
title_short Multiscale characterization of the sea temperature in an area of abalone banks (Haliotis spp.) at Bahia Asuncion, Baja California Sur, Mexico
title_full Multiscale characterization of the sea temperature in an area of abalone banks (Haliotis spp.) at Bahia Asuncion, Baja California Sur, Mexico
title_fullStr Multiscale characterization of the sea temperature in an area of abalone banks (Haliotis spp.) at Bahia Asuncion, Baja California Sur, Mexico
title_full_unstemmed Multiscale characterization of the sea temperature in an area of abalone banks (Haliotis spp.) at Bahia Asuncion, Baja California Sur, Mexico
title_sort multiscale characterization of the sea temperature in an area of abalone banks (haliotis spp.) at bahia asuncion, baja california sur, mexico
description The Baja California abalone is one of the most important Mexican fisheries because of its high economic value. Despite strong management efforts, this fishery has faced dramatic fluctuations attributed mainly to overfishing and variability of the marine climate. In this report we analyze sea temperature variability off Bahía Asunción, Baja California Sur (Mexico), at temporal scales that may affect abalone biological processes, such as mortality, reproduction, recruitment, and individual growth rate. Since the analysis is based on different data sources, we conducted a series of correlation analyses to determine the coherence between them. We report the average daily cycle and its variations throughout the year and between years for the period 1997–2000, the seasonal cycle and interannual deviations for the period 1992–2000, the behavior of the decadal scale variability based on annual values for the period 1959–1997, and the long-term trends after analyzing the entire 20th century. Furthermore, we conducted a spectral density analysis to estimate the proportional contribution of each temporal scale to the entire variability signal. Results from the high-frequency variability (daily to interannual) suggest a relationship between temperature and the abalone reproductive cycles, a potential negative effect of the very strong ENSO events on the postlarvae, and a differential effect of temperature on juveniles of different species. Regarding the low-frequency variability (decadal to century), we show that recent years represent a much warmer period compared to previous decades, suggesting a different biological community structure between periods. The spectral density analysis indicates seasonal variability as the major contributor to the regional variability, followed by the interannual (related to ENSO). There is almost no information of the marine climate in this region, particularly in regard to fine and high-resolution observations. This contribution will provide new quantitative elements for studies dealing with the ecology of these coastal productive systems.
publisher Iniversidad Autónoma de Baja California
publishDate 2003
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/156
_version_ 1715723937089847296
spelling oai:cienciasmarinas.com.mx:article-1562019-04-25T18:49:18Z Multiscale characterization of the sea temperature in an area of abalone banks (Haliotis spp.) at Bahia Asuncion, Baja California Sur, Mexico Caracterización multiescala de la temperatura del mar en una zona de bancos de abulón (Haliotis spp.) en Bahía Asunción, Baja California Sur, México Ponce-Díaz, G Lluch-Cota, SE Bautista-Romero, JJ Lluch-Belda, D Haliotis sea surface temperature Bahía Asunción climate variability ENSO Haliotis temperatura superficial del mar Bahía Asunción variabilidad climática ENSO The Baja California abalone is one of the most important Mexican fisheries because of its high economic value. Despite strong management efforts, this fishery has faced dramatic fluctuations attributed mainly to overfishing and variability of the marine climate. In this report we analyze sea temperature variability off Bahía Asunción, Baja California Sur (Mexico), at temporal scales that may affect abalone biological processes, such as mortality, reproduction, recruitment, and individual growth rate. Since the analysis is based on different data sources, we conducted a series of correlation analyses to determine the coherence between them. We report the average daily cycle and its variations throughout the year and between years for the period 1997–2000, the seasonal cycle and interannual deviations for the period 1992–2000, the behavior of the decadal scale variability based on annual values for the period 1959–1997, and the long-term trends after analyzing the entire 20th century. Furthermore, we conducted a spectral density analysis to estimate the proportional contribution of each temporal scale to the entire variability signal. Results from the high-frequency variability (daily to interannual) suggest a relationship between temperature and the abalone reproductive cycles, a potential negative effect of the very strong ENSO events on the postlarvae, and a differential effect of temperature on juveniles of different species. Regarding the low-frequency variability (decadal to century), we show that recent years represent a much warmer period compared to previous decades, suggesting a different biological community structure between periods. The spectral density analysis indicates seasonal variability as the major contributor to the regional variability, followed by the interannual (related to ENSO). There is almost no information of the marine climate in this region, particularly in regard to fine and high-resolution observations. This contribution will provide new quantitative elements for studies dealing with the ecology of these coastal productive systems. La pesquería de abulón en Baja California es una de las más importantes en México debido a su alto valor comercial. A pesar de diversos esfuerzos de manejo, esta pesquería ha sufrido cambios drásticos que han sido atribuidos principalmente a la sobrepesca y a la variabilidad del clima marino. El presente trabajo analiza la variabilidad de la temperatura del mar en la región de Bahía Asunción, BCS, a escalas temporales que pueden afectar procesos biológicos del abulón tales como mortalidad, reproducción, reclutamiento y crecimiento individual, entre otros. El estudio se basa en diferentes fuentes de información. Se presenta el ciclo circadiano tipo y sus variaciones a lo largo del año y entre años para el periodo 1997–2000, el ciclo estacional y desviaciones interanuales para el periodo 1992–2000, la variabilidad a escala decadal sobre la base de valores anuales promedio del periodo 1959–1997 y el comportamiento de largo plazo con datos de todo el Siglo XX. Adicionalmente, se presenta un análisis de densidad espectral donde se estimaron los valores de contribución porcentual de cada región espectral (escala temporal) a la señal de variabilidad completa. Los resultados de variaciones de alta frecuencia (circadiana a interanual) sugieren una relación entre los ciclos reproductivos y de variación térmica, un efecto potencial negativo de los fenómenos ENSO de gran intensidad sobre las postlarvas de abulón con menor tolerancia a altas temperaturas, así como un efecto diferencial de la temperatura sobre juveniles de diferentes especies. Respecto de la baja frecuencia (decadal a siglo), es evidente que los años recientes representan una condición mucho más cálida que la que persistió durante las décadas anteriores, lo que sugiere estados diferentes de las comunidades biológicas en la región. En el área de estudio es notoria la ausencia de información sobre aspectos del clima marino, particularmente acerca de mediciones finas o de alta frecuencia. Iniversidad Autónoma de Baja California 2003-03-06 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/156 10.7773/cm.v29i3.156 Ciencias Marinas; Vol. 29 No. 3 (2003); 291-303 Ciencias Marinas; Vol. 29 Núm. 3 (2003); 291-303 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/156/132

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