<?xml version="1.0" encoding="UTF-8" ?><xb:digital_entity_call xmlns:xb="http://com/exlibris/digitool/repository/api/xmlbeans"><xb:digital_entity><pid>19030</pid><control><label>Alguns aspectos da...</label><note>Brito, Ana Rita, 1980-</note><ingest_id>ing1573</ingest_id><ingest_name>ulfcbiol_20090917_1</ingest_name><entity_type xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/><entity_group xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/><usage_type>VIEW</usage_type><preservation_level>critical</preservation_level><partition_a>OAI-RUL</partition_a><partition_b xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/><partition_c xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/><status xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/><creation_date>2009-09-17 18:06:31</creation_date><creator>creator:LSARAM</creator><modification_date>2009-09-21 16:14:19</modification_date><modified_by>super:LSARAM</modified_by><admin_unit>DUL01</admin_unit></control><mds><md shared="false"><mid>19997</mid><description> </description><name>descriptive</name><type>dc</type><value><![CDATA[<?xml version="1.0" encoding="UTF-8"?><record xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">	<dc:language>por</dc:language>	<dc:type>info:eu-repo/semantics/masterThesis</dc:type>	<dc:format>application/pdf</dc:format>	<dc:title>Alguns aspectos da dinâmica de populações de anfíbios no Sistema Montanhoso Peneda-Gerês</dc:title>	<dc:description>Tese de mestrado, Biologia (Biologia da Conservação), 2007, Universidade de Lisboa, Faculdade de Ciências</dc:description>	<dcterms:abstract>In this study we observe and compare the beginning of different phases o f Pelophylax perezi reproductive cycle, in six different sites within the Serra Amarela and Serra do Gerês, Parque Nacional da Peneda-Gerês. Using P. perezi as a referential model for other amphibians, the hypothesis of elevation as a factor in reproduction timing was tested. Each site was characterized by the number of eggs, tadpoles and postmetamorphic individuals in each field trip. Data was analyzed in a contingency tables frequency analysis, using the sum of all observations made per site, for a global perspective. A Cluster Analysis and a Principal Components Analysis was also made for a better classification and arrangement, respectively, of monthly observations. To finish the analysis, a Shannon biodiversity index was calculated for amphibian species in each study site. Although some monthly observations suggested so, data analysis didn’t show any significant and consistent differences, in the reproductive cycle of P. perezi, that can be related to the elevation factor</dcterms:abstract>	<dcterms:accessRights>open access</dcterms:accessRights>	<dc:subject>Herpetologia</dc:subject>	<dc:subject>Anfíbios</dc:subject>	<dc:subject>Teses de mestrado</dc:subject>	<dc:creator>Brito, Ana Rita</dc:creator>	<dcterms:advisor>Vicente, Luís A.</dcterms:advisor>	<dc:date>2007</dc:date>	<dc:link>http://catalogo.ul.pt/F/?func=item-global&amp;doc_library=ULB01&amp;type=03&amp;doc_number=000561708</dc:link>	<dcterms:abstract>Neste estudo observou-se, e comparou-se, o aparecimento de diferentes estágios do ciclo de reprodução da Pelophylax Perezi em seis locais na Serra Amarela e Serra do Gerês, Parque Nacional da Peneda-Gerês. Usando P. perezi como modelo animal referencial, foi testada a hipótese de a altitude ser um factor de influência no período de reprodução. Cada local de estudo foi caracterizado pelo número de ovos, girinos e indivíduos pos-metamórficos. Os dados foram sujeitos a uma análise de frequências, para tabelas de contingência, usando tabelas de observações acumuladas, para obter uma perspectiva global dos mesmos. Também se realizou uma Análise de Aglomeração e uma Análise de Componentes Principais para se obter uma melhor classificação e ordenação, respectivamente, das observações mensais. Foi calculado o Índice de diversidade de Shannon para os anfíbios observados em cada local de estudo. Apesar de algumas observações mensais o sugerirem, a análise de dados não revelou diferenças significativas, no ciclo reprodutivo de P. perezi, relacionáveis com o factor altitude</dcterms:abstract></record>]]></value></md><md shared="false"><mid>20004</mid><description xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/><name>technical</name><type>text_md</type><value><![CDATA[<?xml version="1.0" encoding="utf-8"?>
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