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3 resultados encontrados para: AUTOR: Canto, Gabriel
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1.
Artículo
*En hemeroteca, SIBE-Campeche, SIBE-Chetumal, SIBE-San Cristóbal
Hábitos alimenticios del pez Lagodon rhomboides (Perciformes: sparidae) en la laguna costera de Chelem, Yucatán, México
Canto Maza, Walter Gabriel ; Vega Cendejas, María Eugenia (coaut.) ;
Contenido en: Revista de Biología Tropical Vol. 56, no. 4 (diciembre 2008), p. 1837-1846 ISSN: 0034-7744
Bibliotecas: Campeche , Chetumal , San Cristóbal
Cerrar
SIBE Campeche
47661-30 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE Chetumal
47661-20 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE San Cristóbal
47661-10 (Disponible)
Disponibles para prestamo: 1
Nota: En hemeroteca, SIBE-Campeche, SIBE-Chetumal, SIBE-San Cristóbal
PDF
Resumen en: Español | Inglés |
Resumen en español

Se analizó el contenido estomacal de Lagodon rhomboides (Sparidae), la especie más abundante de pez en la zona de pastos marinos en la laguna de Chelem, Yucatán, México. Los especímenes se recolectaron utilizando un chinchorro playero en ocho estaciones distribuidas aleatoriamente durante julio, septiembre y noviembre del 2002. Los componentes tróficos fueron analizados por medio del porcentaje de la abundancia relativa (%A) y la frecuencia de presencia (FO). La similitud trófica entre las diferentes etapas ontogénicas fue determinada usando el índice de Bray-Curtis. Se analizaron un total de 90 contenidos estomacales. Esta especie es omnívora e incluye en su alimentación componentes tanto de origen vegetal como animal; muestra una amplia generalización trófica con 58 componentes alimenticios. La variación trófica ontogénica fue significativa con una progresión alimenticia de una etapa alimenticia a la siguiente. Los individuos de menos talla, consumen preferentemente presas planctónicas y microcrustáceos s (4.0 - 8.0 cm de LE), mientras que en los de mayor talla, los macrocrustáceos (carideos), poliquetos y macrófitas constituyen el alimento principal.

Resumen en inglés

Stomach contents of Lagodon rhomboides, the most abundant fish species from seagrass beds in Chelem Lagoon, Yucatan, Mexico, were analyzed. The specimens were collected using a beach seine at eight stations distributed randomly in the lagoon during July, September and November 2002. The trophic components were analyzed by means of the relative abundance (%A) and frequency of occurrence (FO) indices. The trophic similarity between different ontogenetic stages was determined using the Bray-Curtis Index. A total of 90 stomach contents were analyzed. This species is omnivorous, including vegetal and animal material and has a wide trophic spectrum with 58 alimentary items. Trophic ontogenetic variation was significant with a transition from one feeding stage to the next. Small individuals (4.0 - 8.0 cm LE) preferentially consume plankton preys and microcrustaceans, while in bigger sizes, the macrocrustaceans, annelids and macrophytes were the main food.


2.
Artículo
*En hemeroteca, SIBE-San Cristóbal
Stem anatomical characteristics of the climbing palm Desmoncus orthacanthos (Arecaceae) under two natural growth conditions in a tropical forest
Quiroz, Joaquín ; Orellana Lanza, Roger Armando Antonio (coaut.) ; Canto, Gabriel (coaut.) ; Rebollar Domínguez, Silvia (coaut.) ; Herrera Franco, Pedro (coaut.) ;
Contenido en: Revista de Biología Tropical Vol. 56, no. 2 (junio 2008), p. 937-949 ISSN: 0034-7744
Nota: En hemeroteca, SIBE-San Cristóbal
PDF
Resumen en: Español |
Resumen en español

Desmoncus orthacanthos is a Neotropical climbing palm that resembles rattan and therefore has similar potential applications. The genus Desmoncus (subfamily Arecoideae, subtribe Bactridinae) is distributed throughout the Americas, from Veracruz, Mexico, to Brazil and Bolivia. The anatomical characteristics of its support tissue have not been thoroughly studied, although some observations from Central American artisans suggest that the stems collected from undisturbed sites possess better characteristics; these include a good capacity to withstand bending without breaking (i.e. higher fracture strength than plants from disturbed sites). Stem samples were collected from individuals from disturbed and undisturbed sites, at three points along the length of the stem (basal, medium and apical). Collections were made of one ramet from five individuals (n=5) at both sites. Each ramet was divided into three sections: basal, from soil surface to a height of 0.5 m; medium, from a height of 0.5 to 5.0 m; and apical, from a height 5.0 to 10.0 m. An anatomical analysis including vascular bundles, parenchyma elements and fibers was performed in the radial direction and also along the longitudinal direction of the stems. The amount of vascular bundles was greater for samples from undisturbed site stems; the amount of parenchyma cells differ between samples from both sites and the amount of fibers was greater for samples from disturbed site stems. The anatomical structural dimensions were smaller for samples from the undisturbed site stems. These findings partially confirm the artisans’ belief and supports the conclusion that microclimatic conditions affect plant anatomical structure.


3.
Artículo
*En hemeroteca, SIBE-Chetumal, SIBE-San Cristóbal
Distribución, abundancia y preferencias alimenticias del pez sapo Opsanus phobetron (Batrachoididae) en la laguna costera de Chelem, Yucatán, México
Canto Maza, Walter Gabriel ; Vega Cendejas, María Eugenia (coaut.) ;
Contenido en: Revista de Biología Tropical Vol. 55, no. 3-4 (septiembre-diciembre 2007), p. 979-988 ISSN: 0034-7744
Bibliotecas: Chetumal , San Cristóbal
Cerrar
SIBE Chetumal
44724-20 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE San Cristóbal
44724-10 (Disponible)
Disponibles para prestamo: 1
Nota: En hemeroteca, SIBE-Chetumal, SIBE-San Cristóbal
PDF