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	Provedor de dados BABT (2) Autor Ortega-Rubio,Alfredo (2) Maravilla-Chávez,M. Octavio (1) Romero-Schmidt,Heidi L (1) Zavala-González,Alfredo (1) Palavra-chave Mexico (2) Baja California Sur (1) Gulf of California (1) Livestock grazing (1) Lizard abundance (1) Migration (1) Relative abundance (1) Seasonal variations (1) Zalophus californianus californianus (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2006 (1) 1999 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Four seasons abundance changes of Zalophus californianus californianus (Lesson 1828), Allen, 1880, in the Gulf of California, Mexico BABT Maravilla-Chávez,M. Octavio; Zavala-González,Alfredo; Ortega-Rubio,Alfredo. This paper describes for the first time the relative abundance, population structure and numeric variation of California sea lions in the Gulf of California, Mexico, during four different seasons. The relative abundance estimates varied from the highest 17,162 sea lions in July of 1990 (summer) to a minimum 7,470 in February of 1992 (winter), representing a reduction of 10,000 sea lions. Hypotheses about the migration of part of the population to the Pacific Ocean were compared and discussed against their residency inside the Gulf, and seasonal dispersion of individuals along this inner sea. Tipo: Info:eu-repo/semantics/article Palavras-chave: Zalophus californianus californianus; Seasonal variations; Relative abundance; Migration; Gulf of California; Mexico. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000100013 Changes in lizard abundance on protected versus grazed desert scrub in Baja California Sur, Mexico BABT Romero-Schmidt,Heidi L; Ortega-Rubio,Alfredo. The changes in abundance of three species of lizards were determined and compared between grazed and ungrazed desert scrub near La Paz, in the Cape Region, Baja California Sur, Mexico, from April 1992 to March 1993. A total of 54 censuses were taken of these species over two transect systems, one inside and one outside livestock enclosure. Urosaurus nigricaudus were negatively affected by the grazing activities, but Uta stansburiana exhibited an apparently positive effect by such activities. Cnemidophorus hyperythrus population apparently showed no effect by the livestock grazing. The paper discusses the possible relationship between the microhabitat specificity of each species and their population number individuals response. Tipo: Info:eu-repo/semantics/article Palavras-chave: Baja California Sur; Lizard abundance; Livestock grazing; Mexico. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131999000200007 Registros recuperados: 2 Primeira ... 1 ... Última

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