jueves, 13 de febrero de 2014
jueves, 28 de febrero de 2013
Juan Garcia-de-Lomas 1, José María Torres 1, Ricardo Reques 2, and Ignacio Hernández 1
1Department of Biology, University of Cádiz, Pol. Río San Pedro s/n, Puerto Real (Cádiz) 11510, Spain; E-mail: (JGL) firstname.lastname@example.org; (JMT) email@example.com; (IH) Ignacio.firstname.lastname@example.org. Send reprint requests to JGL.
2Estación Biológica de Doñana, CSIC, Apdo. 1056, Sevilla 41013, Spain; E-mail: email@example.com.
Vernal pools are preferred breeding habitats for numerous amphibian species. The analysis of prey composition during the amphibian larval stages is necessary to understand diet composition and food choice in aquatic communities. We studied the diet of larvae of Pleurodeles waltl when exogenous feeding begins and throughout the flooding period in an episodic Mediterranean pond. The stomach contents were analyzed and the diet was compared to the availability of prey in the pond. The diet analysis revealed an ample diversity of prey, the most abundant being cyclopoid and calanoid copepods and podocopid ostracods. Changes in the composition of the diet corresponded principally to the variations in the availability of different prey as a consequence of the succession of the zooplankton community throughout the flooding period. However, certain taxa such as large anostracans, small anomopods, and turbellarias were not consumed although they were available and abundant. In contrast, prey scarcely represented in the pond such as coleopteran, dipteran, and hemipteran larvae were efficiently captured, suggesting their accessibility to newt larvae. The proportion of prey found in stomachs with respect to their abundance in the pond increased with larval size, coinciding with a reduction in number and bio-volume of available prey. The results suggest that newt larvae are opportunistic feeders and that breeding success of newts may be highly dependent on early egg-laying to match the abundant food supply found at early flooding stages of vernal pools.
Received: March 7, 2011; Accepted: July 20, 2012
viernes, 6 de julio de 2012
lunes, 18 de junio de 2012
viernes, 27 de abril de 2012
viernes, 2 de diciembre de 2011
Gestión de hábitats para la conservación de anfibios en el Parque Natural Sierra de Cardeña y Montoro
ParqueNatural Sierra de Cardeña y Montoro : Investigación, proyectos y estudios = Sierra de Cardeña y Montoro Natural Park : research, projects and studies / coordinador, José Manuel Quero Fernández de Molina.
Córdoba : Servicio de Publicaciones, Universidad de Córdoba : Fundación CajaSur, 2011
438 p. ; 21 cm
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