<?xml version="1.0" encoding="UTF-8"?><?xml-stylesheet type="text/xsl" href="static/style.xsl"?><OAI-PMH xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/ http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd"><responseDate>2026-09-14T15:24:10Z</responseDate><request verb="GetRecord" identifier="oai:gredos.usal.es:10366/21986" metadataPrefix="dim">https://gredos.usal.es/oai/request</request><GetRecord><record><header><identifier>oai:gredos.usal.es:10366/21986</identifier><datestamp>2025-04-30T17:37:10Z</datestamp><setSpec>com_10366_3698</setSpec><setSpec>com_10366_3692</setSpec><setSpec>com_10366_3676</setSpec><setSpec>col_10366_3699</setSpec></header><metadata><dim:dim xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:doc="http://www.lyncode.com/xoai" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.dspace.org/xmlns/dspace/dim http://www.dspace.org/schema/dim.xsd">
<dim:field mdschema="dc" element="contributor" qualifier="author" lang="es_ES" authority="1cee4993-0de8-4e7c-8c48-22e659fb9ddb" confidence="500" orcid_id="">Valverde Gómez, José Antonio, 1926-2003</dim:field>
<dim:field mdschema="dc" element="coverage" qualifier="spatial" lang="es_ES">Laguna de Duero (Valladolid, España)</dim:field>
<dim:field mdschema="dc" element="coverage" qualifier="temporal" lang="es_ES">Mayo 1951</dim:field>
<dim:field mdschema="dc" element="date" qualifier="accessioned" lang="es_ES">2008-09-30</dim:field>
<dim:field mdschema="dc" element="date" qualifier="accessioned">2009-10-08T11:19:34Z</dim:field>
<dim:field mdschema="dc" element="date" qualifier="available">2009-10-08T11:19:34Z</dim:field>
<dim:field mdschema="dc" element="date" qualifier="created" lang="es_ES">[ND]</dim:field>
<dim:field mdschema="dc" element="date" qualifier="issued">2009-10-08T11:19:34Z</dim:field>
<dim:field mdschema="dc" element="identifier" qualifier="uri">http://hdl.handle.net/10366/21986</dim:field>
<dim:field mdschema="dc" element="description" lang="es_ES">Salida de campo a Laguna de Duero (Valladolid) el 15 de mayo de 1951, en la que se anotó una observación sobre la disminución de población de ranas y renacuajos en la laguna (no se identifican especies) y anotaron observaciones sobre las siguientes aves: Acrocephalus scirpaceus (Carricero común), Actitis  hypoleucos (Andarríos chico, llamado Actynioides hypoleucus por el autor), Alectoris rufa (Perdiz roja), Anas platyrhynchos (Ánade azulón), Charadrius hiaticula (Chorlitejo grande), Ciconia ciconia (Cigüeña blanca), Circus sp. (Aguilucho), Corvus corone (Corneja negra), Falco naumanni (Cernícalo primilla), Falco subbuteo (Alcotán), Falco tinnunculus (Cernícalo vulgar), Gallinula chloropus (Gallineta común), Hippolais sp. (Zarcero), Luscinia megarhynchos (Ruiseñor común), Miliaria calandra (Triguero, llamada Emberiza calandra por el autor), Milvus migrans (Milano negro), Milvus milvus (Milano real), Motacilla alba (Lavandera blanca), Passer montanus (Gorrión molinero), Saxicola sp. (Tarabilla), Serinus serinus (Verdecillo), Sturnus sp. (Estornino), Sylvia communis (Curruca zarcera), Tachybaptus ruficollis (Zampullín común, llamado Podiceps ruficollis por el autor), Tetrax  tetrax (Sisón común), Tringa  totanus (Archibebe común), Upupa epops (Abubilla) y Vanellus vanellus (Avefría europea). Además, se incluyen un pequeño esquema del recorrido de la excursión y varios dibujos a rotulador sobre algunas de las aves observadas.</dim:field>
<dim:field mdschema="dc" element="description" lang="es_ES">Field trip to Laguna de Duero (Valladolid) the 15th of May of 1951, in which an observation about a decrease in the population of frogs and tadpoles (without identification of species) in the small lake was noted, as well as observations about the following birds: Acrocephalus scirpaceus (Reed Warbler), Actitis  hypoleucos (Common Sandpiper, refered as, Actynioides hypoleucus by the author), Alectoris rufa (Red-leged Partridge), Anas platyrhynchos (Mallard), Charadrius hiaticula (Common Ringed Plover), Ciconia ciconia (White Stork), Circus sp. (Harrier), Corvus corone (Carrion Crow), Falco naumanni (Lesser Kestrel), Falco subbuteo (Eurasian Hobby), Falco tinnunculus (Common Kestrel), Gallinula chloropus (Common Moorhen), Hippolais sp. (Warbler), Luscinia megarhynchos (Common Nightingale), Miliaria calandra (Corn Bunting, refered as Emberiza calandra by the author), Milvus migrans (Black Kite), Milvus milvus (Red Kite), Motacilla  flava (Yellow Wagtail), Passer montanus (Eurasian Tree Sparrow), Saxicola sp. (Stonechat), Serinus serinus (European Serin), Sturnus sp. (Starling), Sylvia communis (Common Whitethroat), Tachybaptus ruficollis (Little Greebe, refered as Pocideps ruficollis by the author), Tetrax tetrax (Little Bustard), Tringa  totanus (Common Redshank), Upupa epops (Eurasia Hoopoe) and Vanellus vanellus (Northern Lapwing). A little map of the tour and different felt-tip pen illustrations of some of the observed birds are also included.</dim:field>
<dim:field mdschema="dc" element="format" qualifier="extent" lang="es_ES">3 páginas</dim:field>
<dim:field mdschema="dc" element="format" qualifier="mimetype" lang="es_ES">application/pdf</dim:field>
<dim:field mdschema="dc" element="language" lang="es_ES">Español</dim:field>
<dim:field mdschema="dc" element="language" qualifier="iso" lang="es_ES">spa</dim:field>
<dim:field mdschema="dc" element="relation" qualifier="requires" lang="es_ES">Adobe Acrobat</dim:field>
<dim:field mdschema="dc" element="rights">Attribution-NonCommercial-NoDerivs 3.0 Unported</dim:field>
<dim:field mdschema="dc" element="rights" qualifier="uri">https://creativecommons.org/licenses/by-nc-nd/3.0/</dim:field>
<dim:field mdschema="dc" element="rights" qualifier="accessRights" lang="es_ES">info:eu-repo/semantics/openAccess</dim:field>
<dim:field mdschema="dc" element="subject" lang="es_ES">Zoología</dim:field>
<dim:field mdschema="dc" element="subject" lang="es_ES">Ecología</dim:field>
<dim:field mdschema="dc" element="subject" lang="es_ES">Vertebrados</dim:field>
<dim:field mdschema="dc" element="subject" lang="es_ES">Aves</dim:field>
<dim:field mdschema="dc" element="subject" lang="es_ES">Anfibios</dim:field>
<dim:field mdschema="dc" element="subject" lang="es_ES">Laguna de Duero (Valladolid, España)</dim:field>
<dim:field mdschema="dc" element="subject" lang="es_ES">Valladolid (España : Provincia)</dim:field>
<dim:field mdschema="dc" element="subject" lang="es_ES">Castilla y León (España)</dim:field>
<dim:field mdschema="dc" element="subject" lang="es_ES">Zoology</dim:field>
<dim:field mdschema="dc" element="subject" lang="es_ES">Ecology</dim:field>
<dim:field mdschema="dc" element="subject" lang="es_ES">Vertebrates</dim:field>
<dim:field mdschema="dc" element="subject" lang="es_ES">Birds</dim:field>
<dim:field mdschema="dc" element="subject" lang="es_ES">Amphibians</dim:field>
<dim:field mdschema="dc" element="subject" lang="es_ES">Laguna de Duero (Valladolid, Spain)</dim:field>
<dim:field mdschema="dc" element="subject" lang="es_ES">Valladolid (Spain : Province)</dim:field>
<dim:field mdschema="dc" element="subject" lang="es_ES">Castilla y León (Spain)</dim:field>
<dim:field mdschema="dc" element="title" lang="es_ES">Salida de campo a Laguna de Duero (Valladolid) el 15 de mayo de 1951</dim:field>
<dim:field mdschema="dc" element="type" lang="es_ES">info:eu-repo/semantics/workingPaper</dim:field>
<dim:field mdschema="dc" element="type" lang="es_ES">info:eu-repo/semantics/workingPaper</dim:field>
</dim:dim></metadata></record></GetRecord></OAI-PMH>