Relative abundance of Antillean manatees in the Pantanos de Centla Biosphere Reserve in the coastal plain of Tabasco, Mexico
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Redalyc · Ciencias Marinas
Abundance estimates for the Antillean manatee, Trichechus manatus manatus, in the southern Gulf of Mexico are based on interviews, mortality reports, and opportunistic sightings. The lack of quantitative data is explained by the complexity of hard-to-access fluviallake systems, low water transparenc...
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Universidad Autónoma de Baja California
2016
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| author | Gissel Puc-Carrasco |
| author_facet | Gissel Puc-Carrasco |
| collection | Ciencias Marinas |
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| contents | Relative abundance of Antillean manatees in the Pantanos de Centla Biosphere Reserve in the coastal plain of Tabasco, Mexico Gissel Puc-Carrasco León David Olivera-Gómez Stefan Arriaga-Hernández Darwin Jiménez-Domínguez Ciencias de la Tierra side scan sonar Conservation freshwater ecosystems quantitative assessment Abundance estimates for the Antillean manatee, Trichechus manatus manatus , in the southern Gulf of Mexico are based on interviews, mortality reports, and opportunist ic sightings. The lack of qua ntitative data is explained by the complexity of har d-to-access fluvial- lake systems, low water transparency, and th e elusive behavior of manat ees. Side-scan sonar is a prom issory tool to detect and count manatees in fluvial systems. The Pantanos de Centla Biosphere Reserve (PCBR), in the coas tal plain of Tabasco (Mex ico), could play a key role in the regional conservation of manatees, but it is under constant pressu re, especially from the oil an d gas industry, and it is impor tant to generate quantitative data for this area. The objective of this study was to quantify the relative abundance of manatees at 4 selected s ites within PCBR and at 2 reference sites outside the reserv e using side-scan sonar, as a basis for th e long-term monitoring of the species and to determine the importance of the reserve for regional ma natee conservation. We conducted 5 to 7 boa t surveys on 10-km line transects along sel ected water courses and recorded 63 manatee sightings. Manatees occurred at all sampling sites and abundance increased upriver. The site wi th the highest mean abundance (5.17 ± 1.9 manatees/10 km) was located at the southeastern end of PCBR. There was statistical di fference among sites. The southeastern portion of Tabasco is a key re gion for manatee conservation and management in Mexico. PCBR is a key regional featu re but it is necessary to define protec tion strategies within and beyond its southern limits. 2016 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48049436003 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.4 Vol.42 |
| ctrlnum | oai:cienciasmarinas.com.mx:article/2678 10.7773/cm.v42i4.2678 |
| description | Abundance estimates for the Antillean manatee, Trichechus manatus manatus, in the southern Gulf of Mexico are based on interviews, mortality reports, and opportunistic sightings. The lack of quantitative data is explained by the complexity of hard-to-access fluviallake systems, low water transparency, and the elusive behavior of manatees. Side-scan sonar is a promissory tool to detect and count manatees in fluvial systems. The Pantanos de Centla Biosphere Reserve (PCBR), in the coastal plain of Tabasco (Mexico), could play a key role in the regional conservation of manatees, but it is under constant pressure, especially from the oil and gas industry, and it is important to generate quantitative data for this area. The objective of this study was to quantify the relative abundance of manatees at 4 selected sites within PCBR and at 2 reference sites outside the reserve using side-scan sonar, as a basis for the long-term monitoring of the species and to determine the importance of the reserve for regional manatee conservation. We conducted 5 to 7 boat surveys on 10-km line transects along selected water courses and recorded 63 manatee sightings. Manatees occurred at all sampling sites and abundance increased upriver. The site with the highest mean abundance (5.17 ± 1.9 manatees/10 km) was located at the southeastern end of PCBR. There was statistical difference among sites. The southeastern portion of Tabasco is a key region for manatee conservation and management in Mexico. PCBR is a key regional feature but it is necessary to define protection strategies within and beyond its southern limits.
Los registros de abundancia del manatí antillano, Trichechus manatus manatus, en el golfo de México provienen en su mayoría de entrevistas, casos de mortalidad y avistamientos oportunistas. La falta de datos cuantitativos se explica por la complejidad y el difícil acceso a los sistemas fluviolagunares, la baja transparencia del agua y la conducta evasiva de los manatíes. El sonar de barrido lateral es una herramienta promisoria para detectar y contar manatíes en ambientes fluviales. La Reserva de la Biosfera Pantanos de Centla (RBPC), en la planicie costera de Tabasco (México), puede representar un mecanismo importante de conservación regional del manatí. La RBPC está en constante presión de desarrollo, especialmente por parte de la industria de los hidrocarburos, lo que resalta la importancia de generar datos cuantitativos y comparativos. El objetivo de este trabajo fue cuantificar la abundancia relativa de manatíes en 4 sitios seleccionados dentro de la RBPC y en 2 sitios de referencia fuera de la reserva utilizando un sonar de barrido lateral, como base para el monitoreo a largo plazo de la especie y para evaluar la importancia de la RBPC como un mecanismo de conservación regional del manatí. Se realizaron de 5 a 7 recorridos en lancha a lo largo de 10 km lineales en cursos de agua selectos, y se registraron 63 avistamientos de manatíes. Los manatíes estuvieron presentes en todos los sitios y la abundancia se incrementó río arriba. El sitio con mayor abundancia promedio (5.17 ± 1.9 manatíes/10 km) se localizó en el límite sureste de la RBPC. La porción sureste de Tabasco es una región clave para la conservación y manejo del manatí en México. La RBPC es clave en esta región, pero es necesario definir estrategias de protección dentro y fuera de su límite sureste. |
| format | Artículo científico |
| id | redalyc_48049436003 |
| institution | Redalyc Ciencias Marinas |
| language | en |
| publishDate | 2016 |
| publisher | Universidad Autónoma de Baja California |
| spelling | Relative abundance of Antillean manatees in the Pantanos de Centla Biosphere Reserve in the coastal plain of Tabasco, Mexico Abundancia relativa del manatí antillano en la Reserva de la Biosfera Pantanos de Centla en la planicie costera de Tabasco, México Puc-Carrasco, Giselle Olivera-Gómez, León David Arriaga-Hernández, Stefan Jiménez-Domínguez, Darwin Abundance estimates for the Antillean manatee, Trichechus manatus manatus, in the southern Gulf of Mexico are based on interviews, mortality reports, and opportunistic sightings. The lack of quantitative data is explained by the complexity of hard-to-access fluviallake systems, low water transparency, and the elusive behavior of manatees. Side-scan sonar is a promissory tool to detect and count manatees in fluvial systems. The Pantanos de Centla Biosphere Reserve (PCBR), in the coastal plain of Tabasco (Mexico), could play a key role in the regional conservation of manatees, but it is under constant pressure, especially from the oil and gas industry, and it is important to generate quantitative data for this area. The objective of this study was to quantify the relative abundance of manatees at 4 selected sites within PCBR and at 2 reference sites outside the reserve using side-scan sonar, as a basis for the long-term monitoring of the species and to determine the importance of the reserve for regional manatee conservation. We conducted 5 to 7 boat surveys on 10-km line transects along selected water courses and recorded 63 manatee sightings. Manatees occurred at all sampling sites and abundance increased upriver. The site with the highest mean abundance (5.17 ± 1.9 manatees/10 km) was located at the southeastern end of PCBR. There was statistical difference among sites. The southeastern portion of Tabasco is a key region for manatee conservation and management in Mexico. PCBR is a key regional feature but it is necessary to define protection strategies within and beyond its southern limits. Los registros de abundancia del manatí antillano, Trichechus manatus manatus, en el golfo de México provienen en su mayoría de entrevistas, casos de mortalidad y avistamientos oportunistas. La falta de datos cuantitativos se explica por la complejidad y el difícil acceso a los sistemas fluviolagunares, la baja transparencia del agua y la conducta evasiva de los manatíes. El sonar de barrido lateral es una herramienta promisoria para detectar y contar manatíes en ambientes fluviales. La Reserva de la Biosfera Pantanos de Centla (RBPC), en la planicie costera de Tabasco (México), puede representar un mecanismo importante de conservación regional del manatí. La RBPC está en constante presión de desarrollo, especialmente por parte de la industria de los hidrocarburos, lo que resalta la importancia de generar datos cuantitativos y comparativos. El objetivo de este trabajo fue cuantificar la abundancia relativa de manatíes en 4 sitios seleccionados dentro de la RBPC y en 2 sitios de referencia fuera de la reserva utilizando un sonar de barrido lateral, como base para el monitoreo a largo plazo de la especie y para evaluar la importancia de la RBPC como un mecanismo de conservación regional del manatí. Se realizaron de 5 a 7 recorridos en lancha a lo largo de 10 km lineales en cursos de agua selectos, y se registraron 63 avistamientos de manatíes. Los manatíes estuvieron presentes en todos los sitios y la abundancia se incrementó río arriba. El sitio con mayor abundancia promedio (5.17 ± 1.9 manatíes/10 km) se localizó en el límite sureste de la RBPC. La porción sureste de Tabasco es una región clave para la conservación y manejo del manatí en México. La RBPC es clave en esta región, pero es necesario definir estrategias de protección dentro y fuera de su límite sureste. Universidad Autónoma de Baja California, Instituto de Investigaciones Oceanológicas 2016-12-20 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf https://cienciasmarinas.com.mx/index.php/cmarinas/article/view/2678 10.7773/cm.v42i4.2678 Ciencias Marinas; Vol. 42 No. 4 (2016); 261–270 Ciencias Marinas; Vol. 42 Núm. 4 (2016); 261–270 2395-9053 0185-3880 eng https://cienciasmarinas.com.mx/index.php/cmarinas/article/view/2678/1611 Copyright (c) 2016 Ciencias Marinas ['Redalyc'] redalyc_48049436003 Relative abundance of Antillean manatees in the Pantanos de Centla Biosphere Reserve in the coastal plain of Tabasco, Mexico ['Relative abundance of Antillean manatees in the Pantanos de Centla Biosphere Reserve in the coastal plain of Tabasco, Mexico', 'Gissel Puc-Carrasco', 'Ciencias de la Tierra', 'side', 'scan sonar', 'Conservation', 'freshwater ecosystems', 'quantitative assessment', 'Relative abundance of Antillean manatees in the Pantanos de Centla Biosphere Reserve in the coastal plain of Tabasco, Mexico Gissel Puc-Carrasco León David Olivera-Gómez Stefan Arriaga-Hernández Darwin Jiménez-Domínguez Ciencias de la Tierra side scan sonar Conservation freshwater ecosystems quantitative assessment Abundance estimates for the Antillean manatee, Trichechus manatus manatus , in the southern Gulf of Mexico are based on interviews, mortality reports, and opportunist ic sightings. The lack of qua ntitative data is explained by the complexity of har d-to-access fluvial- lake systems, low water transparency, and th e elusive behavior of manat ees. Side-scan sonar is a prom issory tool to detect and count manatees in fluvial systems. The Pantanos de Centla Biosphere Reserve (PCBR), in the coas tal plain of Tabasco (Mex ico), could play a key role in the regional conservation of manatees, but it is under constant pressu re, especially from the oil an d gas industry, and it is impor tant to generate quantitative data for this area. The objective of this study was to quantify the relative abundance of manatees at 4 selected s ites within PCBR and at 2 reference sites outside the reserv e using side-scan sonar, as a basis for th e long-term monitoring of the species and to determine the importance of the reserve for regional ma natee conservation. We conducted 5 to 7 boa t surveys on 10-km line transects along sel ected water courses and recorded 63 manatee sightings. Manatees occurred at all sampling sites and abundance increased upriver. The site wi th the highest mean abundance (5.17 ± 1.9 manatees/10 km) was located at the southeastern end of PCBR. There was statistical di fference among sites. The southeastern portion of Tabasco is a key re gion for manatee conservation and management in Mexico. PCBR is a key regional featu re but it is necessary to define protec tion strategies within and beyond its southern limits. 2016 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48049436003 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.4 Vol.42'] ['Gissel Puc-Carrasco'] ['Gissel Puc-Carrasco'] ['Artículo científico'] ['2016'] ['Universidad Autónoma de Baja California'] ['en'] ['Ciencias de la Tierra', 'side', 'scan sonar', 'Conservation', 'freshwater ecosystems', 'quantitative assessment'] ['https://www.redalyc.org/articulo.oa?id=48049436003'] ['Relative abundance of Antillean manatees in the Pantanos de Centla Biosphere Reserve in the coastal plain of Tabasco, Mexico Gissel Puc-Carrasco León David Olivera-Gómez Stefan Arriaga-Hernández Darwin Jiménez-Domínguez Ciencias de la Tierra side scan sonar Conservation freshwater ecosystems quantitative assessment Abundance estimates for the Antillean manatee, Trichechus manatus manatus , in the southern Gulf of Mexico are based on interviews, mortality reports, and opportunist ic sightings. The lack of qua ntitative data is explained by the complexity of har d-to-access fluvial- lake systems, low water transparency, and th e elusive behavior of manat ees. Side-scan sonar is a prom issory tool to detect and count manatees in fluvial systems. The Pantanos de Centla Biosphere Reserve (PCBR), in the coas tal plain of Tabasco (Mex ico), could play a key role in the regional conservation of manatees, but it is under constant pressu re, especially from the oil an d gas industry, and it is impor tant to generate quantitative data for this area. The objective of this study was to quantify the relative abundance of manatees at 4 selected s ites within PCBR and at 2 reference sites outside the reserv e using side-scan sonar, as a basis for th e long-term monitoring of the species and to determine the importance of the reserve for regional ma natee conservation. We conducted 5 to 7 boa t surveys on 10-km line transects along sel ected water courses and recorded 63 manatee sightings. Manatees occurred at all sampling sites and abundance increased upriver. The site wi th the highest mean abundance (5.17 ± 1.9 manatees/10 km) was located at the southeastern end of PCBR. There was statistical di fference among sites. The southeastern portion of Tabasco is a key re gion for manatee conservation and management in Mexico. PCBR is a key regional featu re but it is necessary to define protec tion strategies within and beyond its southern limits. 2016 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48049436003 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.4 Vol.42'] |
| spellingShingle | Relative abundance of Antillean manatees in the Pantanos de Centla Biosphere Reserve in the coastal plain of Tabasco, Mexico Gissel Puc-Carrasco Ciencias de la Tierra side scan sonar Conservation freshwater ecosystems quantitative assessment Relative abundance of Antillean manatees in the Pantanos de Centla Biosphere Reserve in the coastal plain of Tabasco, Mexico Gissel Puc-Carrasco León David Olivera-Gómez Stefan Arriaga-Hernández Darwin Jiménez-Domínguez Ciencias de la Tierra side scan sonar Conservation freshwater ecosystems quantitative assessment Abundance estimates for the Antillean manatee, Trichechus manatus manatus , in the southern Gulf of Mexico are based on interviews, mortality reports, and opportunist ic sightings. The lack of qua ntitative data is explained by the complexity of har d-to-access fluvial- lake systems, low water transparency, and th e elusive behavior of manat ees. Side-scan sonar is a prom issory tool to detect and count manatees in fluvial systems. The Pantanos de Centla Biosphere Reserve (PCBR), in the coas tal plain of Tabasco (Mex ico), could play a key role in the regional conservation of manatees, but it is under constant pressu re, especially from the oil an d gas industry, and it is impor tant to generate quantitative data for this area. The objective of this study was to quantify the relative abundance of manatees at 4 selected s ites within PCBR and at 2 reference sites outside the reserv e using side-scan sonar, as a basis for th e long-term monitoring of the species and to determine the importance of the reserve for regional ma natee conservation. We conducted 5 to 7 boa t surveys on 10-km line transects along sel ected water courses and recorded 63 manatee sightings. Manatees occurred at all sampling sites and abundance increased upriver. The site wi th the highest mean abundance (5.17 ± 1.9 manatees/10 km) was located at the southeastern end of PCBR. There was statistical di fference among sites. The southeastern portion of Tabasco is a key re gion for manatee conservation and management in Mexico. PCBR is a key regional featu re but it is necessary to define protec tion strategies within and beyond its southern limits. 2016 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48049436003 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.4 Vol.42 |
| title | Relative abundance of Antillean manatees in the Pantanos de Centla Biosphere Reserve in the coastal plain of Tabasco, Mexico |
| title_alt | Abundancia relativa del manatí antillano en la Reserva de la Biosfera Pantanos de Centla en la planicie costera de Tabasco, México |
| topic | Ciencias de la Tierra side scan sonar Conservation freshwater ecosystems quantitative assessment |
| url | https://www.redalyc.org/articulo.oa?id=48049436003 https://cienciasmarinas.com.mx/index.php/cmarinas/article/view/2678 |