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No. de sistema: 000050173

LDR _ _ 00000nab^^22^^^^^za^4500
008 _ _ 110222m20109999mx^qr^p^^^^^^z0^^^a0spa^d
040 _ _ a| ECO
c| ECO
043 _ _ a| n-mx-tb
245 0 0 a| Caracterización espacio-temporal del hábitat y presencia de Dermatemys mawii (Testudines: Dermatemydidae) en la cuenca del Grijalva-Usumacinta, Tabasco, México
246 1 1 a| Presence and spatio-temporal habitat characterization of Dermatemys mawii (Testudines: Dermatemydidae) in the Grijalva-Usumacinta watershed, Tabasco, Mexico
520 1 _ a| The Central American River Turtle (Dermatemys mawii) is an endangered species that has been poorly studied. There are no reports on their population status, habitat condition, and the species distribution area is still unknown. This study analyzes the seasonal and spatial variations of their habitat and the presence/absence of D. mawii in three rivers within the Pantanos de Centla Biosphere Reserve (Tabasco, Mexico). For habitat characterization, natural segmentation of rivers was used and three sites per segment were identified, 9 in each rivers (Grijalva and Usumacinta) and 6 in Tabasquillo. Additionally, the evaluation of 11 environmental variables such as water hydrological, physicochemical characteristics and riparian and hydrophytic vegetation were carried out during two different seasons (dry and rainy). The presence/absence of species was assessed with eight fike nets that were set per segment, with a capture effort of 384 hours per trap. The capture per unit effort (CPUE) was used as an indicator of relative abundance. The results indicated spatio-temporal variations in habitat characteristics and the presence of environmental gradients. The principal components analysis (PCA) applied allowed us to determine that the first three components explained 67.8% of the environmental variability. The species presence was confirmed in all rivers, however significant differences exists in their relative abundance: the highest was registered in the Tabasquillo River where the species was present in both seasons and in all segments. Of the 11 environmental variables analyzed, the gradient, shelter and depth were the most indicative of species presence. The obtained results evidenced the importance of riparian vegetation as habitat for Dermatemys. This represents the first approach towards an action plan for a species and its habitat protection within the Pantanos de Centla Biosphere Reserve.
538 _ _ a| Adobe Acrobat profesional 6.0 o superior e Internet
650 _ 4 a| Dermatemys mawii
650 _ 4 a| Especies en peligro de extinción
650 _ 4 a| Conservación del hábitat
650 _ 4 a| Conservación de la vida silvestre
651 _ 4 a| Reserva de la Biosfera Pantanos de Centla (Tabasco, México)
700 1 _ a| Zenteno Ruíz, Claudia Elena
700 1 _ a| Barba Macías, Everardo
c| Dr.
e| coaut.
n| 16678693600
700 1 _ a| Bello Gutiérrez, Joaquín
e| coaut.
700 1 _ a| Ochoa Gaona, Susana
c| Dra.
e| coaut.
773 0 _
t| Revista de Biología Tropical
g| Vol. 58, no. 4 (diciembre 2010), p. 1247-1270
x| 0034-7744
856 4 1 u| http://www.redalyc.org/articulo.oa?id=44918952017
z| Artículo electrónico
900 _ _ a| En hemeroteca, SIBE-Chetumal, SIBE-San Cristóbal
901 _ _ a| Artículo con arbitraje
902 _ _ a| Nzp/Odg
904 _ _ a| Febrero 2011
905 _ _ a| Artfrosur
905 _ _ a| Artecosur
905 _ _ a| Biblioelectrónica
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*En hemeroteca, SIBE-Chetumal, SIBE-San Cristóbal
Caracterización espacio-temporal del hábitat y presencia de Dermatemys mawii (Testudines: Dermatemydidae) en la cuenca del Grijalva-Usumacinta, Tabasco, México = Presence and spatio-temporal habitat characterization of Dermatemys mawii (Testudines: Dermatemydidae) in the Grijalva-Usumacinta watershed, Tabasco, Mexico
Zenteno Ruíz, Claudia Elena (autor)
Barba Macías, Everardo (autor)
Bello Gutiérrez, Joaquín (autor)
Ochoa Gaona, Susana (autor)
Contenido en: Revista de Biología Tropical. Vol. 58, no. 4 (diciembre 2010), p. 1247-1270. ISSN: 0034-7744
Bibliotecas:
Chetumal , San Cristóbal
No. de sistema: 50173
Tipo: - Artículo con arbitraje
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Inglés

"The Central American River Turtle (Dermatemys mawii) is an endangered species that has been poorly studied. There are no reports on their population status, habitat condition, and the species distribution area is still unknown. This study analyzes the seasonal and spatial variations of their habitat and the presence/absence of D. mawii in three rivers within the Pantanos de Centla Biosphere Reserve (Tabasco, Mexico). For habitat characterization, natural segmentation of rivers was used and three sites per segment were identified, 9 in each rivers (Grijalva and Usumacinta) and 6 in Tabasquillo. Additionally, the evaluation of 11 environmental variables such as water hydrological, physicochemical characteristics and riparian and hydrophytic vegetation were carried out during two different seasons (dry and rainy). The presence/absence of species was assessed with eight fike nets that were set per segment, with a capture effort of 384 hours per trap. The capture per unit effort (CPUE) was used as an indicator of relative abundance. The results indicated spatio-temporal variations in habitat characteristics and the presence of environmental gradients. The principal components analysis (PCA) applied allowed us to determine that the first three components explained 67.8% of the environmental variability. The species presence was confirmed in all rivers, however significant differences exists in their relative abundance: the highest was registered in the Tabasquillo River where the species was present in both seasons and in all segments. Of the 11 environmental variables analyzed, the gradient, shelter and depth were the most indicative of species presence. The obtained results evidenced the importance of riparian vegetation as habitat for Dermatemys. This represents the first approach towards an action plan for a species and its habitat protection within the Pantanos de Centla Biosphere Reserve."

SIBE Chetumal
Codigo de barra
Estado
Colección
50230-20
(Disponible)
Artículos de investigación ECOSUR
SIBE San Cristóbal
Codigo de barra
Estado
Colección
50230-10
(Disponible)
Artículos de investigación ECOSUR

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