Oceanographic conditions and marine mammals: identifying a potential relationship in the coastal region of the Mexican Central Pacific

The oceanographic conditions that could influence richness and distribution of marine mammal species in the coastal area of the Mexican Central Pacific (MCP) were investigated throughout 2011. Marine mammals observations were obtained from two research platforms. CTD casts were deployed down to 100...

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Autores principales:	Kono-Martínez,Tadashi, Ortega-Ortiz,Christian D., Olivos-Ortiz,Aramis, Torres-Orozco,Ernesto, González-Rodríguez,Eduardo
Lenguaje:	English
Publicado:	Universidad de Valparaíso. Facultad de Ciencias del Mar 2017
Materias:	Mesoscale dynamic structures chlorophyll-a sea surface temperature bathymetry marine mammals
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572017000300006
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spelling	oai:scielo:S0718-195720170003000062018-02-22Oceanographic conditions and marine mammals: identifying a potential relationship in the coastal region of the Mexican Central PacificKono-Martínez,TadashiOrtega-Ortiz,Christian D.Olivos-Ortiz,AramisTorres-Orozco,ErnestoGonzález-Rodríguez,Eduardo Mesoscale dynamic structures chlorophyll-a sea surface temperature bathymetry marine mammals The oceanographic conditions that could influence richness and distribution of marine mammal species in the coastal area of the Mexican Central Pacific (MCP) were investigated throughout 2011. Marine mammals observations were obtained from two research platforms. CTD casts were deployed down to 100 m, water samples were taken monthly at six stations for determination of organic nutrients, and another 15 stations were sampled over a wider area only during the winter. Satellite images from MODIS-AQUA L2 were used to obtain sea surface temperature (SST) and chlorophyll-a (Chl-a) values, likewise altimetry data to identify mesoscale dynamic structures in the region. High salinity values (34.6), low concentrations of nitrates and nitrites (~3-4 µM), silicates (5-7 µM), Chl-a (~10 mg m-3), and low SST (~23.5°C) were detected, as well as the presence of cyclonic gyres near the coast during the winter-spring period. This coincided with high marine mammal species richness in the area (from 5 to 9 species depending on spatial scale). The dominant species was Megaptera novaeangliae (0.092 sightings km-1), which was distributed close to the coast in shallow waters. Low salinity (32.8) and Chl-a values (0.1 mg m-3) were detected during the summer-fall period. High phosphate availability (2.5 µM), presence of anticyclonic gyres, and high SST (~31°C) were also found, coinciding with low species richness (3 species). The dominant species was Stenella attenuata (0.036 sightings km-1); those individuals were found distributed near the Jalisco-Colima coast (0-3 nm) in shallow waters with high inorganic nutrient availability. The principal components analysis showed that bathymetry (99.6%) was the main parameter explaining data variance; this parameter could therefore potentially modulate ecological aspects of marine mammals.info:eu-repo/semantics/openAccessUniversidad de Valparaíso. Facultad de Ciencias del MarRevista de biología marina y oceanografía v.52 n.3 20172017-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572017000300006en10.4067/S0718-19572017000300006
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Mesoscale dynamic structures chlorophyll-a sea surface temperature bathymetry marine mammals
spellingShingle	Mesoscale dynamic structures chlorophyll-a sea surface temperature bathymetry marine mammals Kono-Martínez,Tadashi Ortega-Ortiz,Christian D. Olivos-Ortiz,Aramis Torres-Orozco,Ernesto González-Rodríguez,Eduardo Oceanographic conditions and marine mammals: identifying a potential relationship in the coastal region of the Mexican Central Pacific
description	The oceanographic conditions that could influence richness and distribution of marine mammal species in the coastal area of the Mexican Central Pacific (MCP) were investigated throughout 2011. Marine mammals observations were obtained from two research platforms. CTD casts were deployed down to 100 m, water samples were taken monthly at six stations for determination of organic nutrients, and another 15 stations were sampled over a wider area only during the winter. Satellite images from MODIS-AQUA L2 were used to obtain sea surface temperature (SST) and chlorophyll-a (Chl-a) values, likewise altimetry data to identify mesoscale dynamic structures in the region. High salinity values (34.6), low concentrations of nitrates and nitrites (~3-4 µM), silicates (5-7 µM), Chl-a (~10 mg m-3), and low SST (~23.5°C) were detected, as well as the presence of cyclonic gyres near the coast during the winter-spring period. This coincided with high marine mammal species richness in the area (from 5 to 9 species depending on spatial scale). The dominant species was Megaptera novaeangliae (0.092 sightings km-1), which was distributed close to the coast in shallow waters. Low salinity (32.8) and Chl-a values (0.1 mg m-3) were detected during the summer-fall period. High phosphate availability (2.5 µM), presence of anticyclonic gyres, and high SST (~31°C) were also found, coinciding with low species richness (3 species). The dominant species was Stenella attenuata (0.036 sightings km-1); those individuals were found distributed near the Jalisco-Colima coast (0-3 nm) in shallow waters with high inorganic nutrient availability. The principal components analysis showed that bathymetry (99.6%) was the main parameter explaining data variance; this parameter could therefore potentially modulate ecological aspects of marine mammals.
author	Kono-Martínez,Tadashi Ortega-Ortiz,Christian D. Olivos-Ortiz,Aramis Torres-Orozco,Ernesto González-Rodríguez,Eduardo
author_facet	Kono-Martínez,Tadashi Ortega-Ortiz,Christian D. Olivos-Ortiz,Aramis Torres-Orozco,Ernesto González-Rodríguez,Eduardo
author_sort	Kono-Martínez,Tadashi
title	Oceanographic conditions and marine mammals: identifying a potential relationship in the coastal region of the Mexican Central Pacific
title_short	Oceanographic conditions and marine mammals: identifying a potential relationship in the coastal region of the Mexican Central Pacific
title_full	Oceanographic conditions and marine mammals: identifying a potential relationship in the coastal region of the Mexican Central Pacific
title_fullStr	Oceanographic conditions and marine mammals: identifying a potential relationship in the coastal region of the Mexican Central Pacific
title_full_unstemmed	Oceanographic conditions and marine mammals: identifying a potential relationship in the coastal region of the Mexican Central Pacific
title_sort	oceanographic conditions and marine mammals: identifying a potential relationship in the coastal region of the mexican central pacific
publisher	Universidad de Valparaíso. Facultad de Ciencias del Mar
publishDate	2017
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572017000300006
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_version_	1714202373349441536

Oceanographic conditions and marine mammals: identifying a potential relationship in the coastal region of the Mexican Central Pacific

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