Underwater vessel noise in a commercial and tourist bay complex in the Mexican Central Pacific

Underwater vessel noise in a commercial and tourist bay complex in the Mexican Central Pacific

Noise generated by ship traffic is increasing around the world. Hence, there is need to effectively evaluate anthropogenic noise levels in marine habitats. In this study, the noise contribution of ships in the Santiago–Manzanillo bay complex, on the Pacific coast of central Mexico, was assessed. The...

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Autores principales: Rosales-Chapula, David A, Ortega-Ortiz, Christian D, Llamas-González, Myriam, Olivos-Ortiz, Aramis, Torres-Orozco, Ernesto, Leon-Lopez, Braulio, Romero-Vivas, Eduardo
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Lenguaje:eng
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Publicado: Iniversidad Autónoma de Baja California 2022
Acceso en línea:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3214
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record_format ojs
institution Ciencias Marinas
collection OJS
language eng
spa
format Online
author Rosales-Chapula, David A
Ortega-Ortiz, Christian D
Llamas-González, Myriam
Olivos-Ortiz, Aramis
Torres-Orozco, Ernesto
Leon-Lopez, Braulio
Romero-Vivas, Eduardo
spellingShingle Rosales-Chapula, David A
Ortega-Ortiz, Christian D
Llamas-González, Myriam
Olivos-Ortiz, Aramis
Torres-Orozco, Ernesto
Leon-Lopez, Braulio
Romero-Vivas, Eduardo
Underwater vessel noise in a commercial and tourist bay complex in the Mexican Central Pacific
author_facet Rosales-Chapula, David A
Ortega-Ortiz, Christian D
Llamas-González, Myriam
Olivos-Ortiz, Aramis
Torres-Orozco, Ernesto
Leon-Lopez, Braulio
Romero-Vivas, Eduardo
author_sort Rosales-Chapula, David A
title Underwater vessel noise in a commercial and tourist bay complex in the Mexican Central Pacific
title_short Underwater vessel noise in a commercial and tourist bay complex in the Mexican Central Pacific
title_full Underwater vessel noise in a commercial and tourist bay complex in the Mexican Central Pacific
title_fullStr Underwater vessel noise in a commercial and tourist bay complex in the Mexican Central Pacific
title_full_unstemmed Underwater vessel noise in a commercial and tourist bay complex in the Mexican Central Pacific
title_sort underwater vessel noise in a commercial and tourist bay complex in the mexican central pacific
description Noise generated by ship traffic is increasing around the world. Hence, there is need to effectively evaluate anthropogenic noise levels in marine habitats. In this study, the noise contribution of ships in the Santiago–Manzanillo bay complex, on the Pacific coast of central Mexico, was assessed. The semienclosed bay complex is one of the most important commercial ports in Mexico, and it is an area with high biological richness and tourism demand, including demand by the informal humpback whale watching industry. Bottom-fixed recording systems were deployed at the entrance to the bay, near the commercial port (Manzanillo Bay), and within the tourist area (Santiago Bay). Monthly acoustic records were obtained from September 2015 to August 2016. Boat categories confirmed by visual sightings were associated with their acoustic signals. According to the diagnostic frequency range, vessel noise was classified into noise coming from large ships (50–220 Hz) or from small vessels (290–500 Hz). Large ships were always detected at both stations, while, as expected, small vessels were more common in tourist areas. Vessel noise in the entire area ranged from 130 to 170 dB (RMS re 1 μPa) and was present up to a median of 81.8% of the time throughout the year, with higher prevalence from 1200 to 1600 hours. Marine traffic activities were constant in the area, but frequency content and sound pressure levels were not equally distributed across the bay. Therefore, it is important to consider the possible differential impacts on marine fauna inhabiting the area.
publisher Iniversidad Autónoma de Baja California
publishDate 2022
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3214
_version_ 1792095474658836480
spelling oai:cienciasmarinas.com.mx:article-32142023-12-20T17:55:23Z Underwater vessel noise in a commercial and tourist bay complex in the Mexican Central Pacific Ruido submarino de embarcaciones en un complejo de bahías turístico-comerciales en el Pacífico central mexicano Rosales-Chapula, David A Ortega-Ortiz, Christian D Llamas-González, Myriam Olivos-Ortiz, Aramis Torres-Orozco, Ernesto Leon-Lopez, Braulio Romero-Vivas, Eduardo vessel noise commercial port tourist port disturbance whales ruido de embarcaciones puerto comencial puerto turístico disturbio ballenas Noise generated by ship traffic is increasing around the world. Hence, there is need to effectively evaluate anthropogenic noise levels in marine habitats. In this study, the noise contribution of ships in the Santiago–Manzanillo bay complex, on the Pacific coast of central Mexico, was assessed. The semienclosed bay complex is one of the most important commercial ports in Mexico, and it is an area with high biological richness and tourism demand, including demand by the informal humpback whale watching industry. Bottom-fixed recording systems were deployed at the entrance to the bay, near the commercial port (Manzanillo Bay), and within the tourist area (Santiago Bay). Monthly acoustic records were obtained from September 2015 to August 2016. Boat categories confirmed by visual sightings were associated with their acoustic signals. According to the diagnostic frequency range, vessel noise was classified into noise coming from large ships (50–220 Hz) or from small vessels (290–500 Hz). Large ships were always detected at both stations, while, as expected, small vessels were more common in tourist areas. Vessel noise in the entire area ranged from 130 to 170 dB (RMS re 1 μPa) and was present up to a median of 81.8% of the time throughout the year, with higher prevalence from 1200 to 1600 hours. Marine traffic activities were constant in the area, but frequency content and sound pressure levels were not equally distributed across the bay. Therefore, it is important to consider the possible differential impacts on marine fauna inhabiting the area. El ruido generado por el tránsito de embarcaciones ha ido en aumento a nivel mundial, por lo que se requiere evaluar objetivamente los niveles de ruido antropogénico en los hábitats marinos. En este estudio, se evaluó la contribución de las embarcaciones a los niveles de ruido en el complejo de bahías Santiago-Manzanillo, en la costa del Pacífico central mexicano. Este complejo de bahías semicerradas es uno de los puertos comerciales más importantes de México y, a su vez, un área con alta riqueza biológica y demanda turística, incluida la demanda de la industria informal de avistamiento de ballenas jorobadas. Desde septiembre de 2015 hasta agosto de 2016, se obtuvieron registros acústicos mensuales de sistemas de grabación fijos colocados en la entrada a la bahía, cerca del puerto comercial (bahía de Manzanillo) y dentro del área turística (bahía de Santiago). Los barcos avistados durante las grabaciones se asociaron a sus señales acústicas y se agruparon por categoría. De acuerdo con su rango diagnóstico de frecuencia, el ruido de los barcos se clasificó en barcos grandes (50–220 Hz) y pequeños (290–500 Hz). Los barcos grandes siempre se detectaron en ambas estaciones, mientras que, como se esperaba, los barcos pequeños fueron más comunes en las zonas turísticas. El ruido de embarcaciones en toda la zona osciló entre 130 y 170 dB (RMS re 1 μPa) y estuvo presente en una mediana de hasta el 81.8% del tiempo a lo largo del año, con mayor prevalencia entre las 1200 y 1600 horas. Las actividades del tráfico marítimo fueron constantes en el área, pero el contenido de frecuencias y los niveles de presión sonora no se distribuyeron por igual a lo largo de la bahía, por lo que se deben diferenciar los posibles impactos sobre la fauna marina que habita en el área. Iniversidad Autónoma de Baja California 2022-06-28 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf text/xml text/xml https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3214 10.7773/cm.y2022.3214 Ciencias Marinas; Vol. 48 (2022) Ciencias Marinas; Vol. 48 (2022) 2395-9053 0185-3880 eng spa https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3214/420420687 https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3214/420420909 https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3214/420420910 Copyright (c) 2022 David A Rosales-Chapula, Christian D Ortega-Ortiz, Myriam Llamas-González, Aramis Olivos-Ortiz, Ernesto Torres-Orozco, Braulio Leon-Lopez, Eduardo Romero-Vivas https://creativecommons.org/licenses/by/4.0

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