{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,11]],"date-time":"2026-04-11T02:16:03Z","timestamp":1775873763769,"version":"3.50.1"},"reference-count":0,"publisher":"Walter de Gruyter GmbH","issue":"2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Amphib Reptilia"],"published-print":{"date-parts":[[2010]]},"abstract":"<jats:sec>\n\t\t\t\t\t<jats:title>Abstract<\/jats:title>\n\t\t\t\t\t<jats:p>Mediterranean vipers are ecologically very similar. When in contact, they\n\t\t\t\t\t\tconstitute an exceptional model to study the effects of competitive\n\t\t\t\t\t\tinteractions and niche segregation mechanisms. In High Ebro, distinct\n\t\t\t\t\t\tmethodologies (random visual encounter, road sampling and radio-tracking\n\t\t\t\t\t\tsurveys, captive maintenance, standardized transects and ad hoc field\n\t\t\t\t\t\tobservations) were used to compare ecological traits (diet, micro-habitat,\n\t\t\t\t\t\tactivity, reproductive and demographic) of V. aspis, V. latastei and hybrids\n\t\t\t\t\t\tamong both species and determine competitive advantages of each form. Diet\n\t\t\t\t\t\tpreferences were similar but few differences were found in feeding frequency\n\t\t\t\t\t\tand annual variation in diet consumption. Males of the three forms compete\n\t\t\t\t\t\tfor areas with similar characteristics but differences were found mainly\n\t\t\t\t\t\tduring summer. Significant differences in average movement rates and home\n\t\t\t\t\t\trange size were found among males. Fecundity and new-borns fitness were\n\t\t\t\t\t\tlower in V. aspis than in V. latastei, whereas hybrids had intermediate\n\t\t\t\t\t\tvalues. Male and female adult hybrids were more abundant than parental\n\t\t\t\t\t\tforms, whereas female and juvenile V. latastei and juvenile hybrids had high\n\t\t\t\t\t\troad-mortality. The three forms seem to be competing intensely for resources\n\t\t\t\t\t\tbut the segregation on the spatial and temporal axes of their niches could\n\t\t\t\t\t\tbe reducing interspecific competition and allowing coexistence. The use of\n\t\t\t\t\t\tdifferent resources probably confers reproductive and demographic advantages\n\t\t\t\t\t\tfor V. latastei and hybrids, respectively. Moreover, reproductive fitness of\n\t\t\t\t\t\thybrids suggests the occurrence of endogenous selection. Comparative thermal\n\t\t\t\t\t\tand genetic studies are needed to clarify the limiting factors of vipers and\n\t\t\t\t\t\tto establish a model of the hybrid zone.<\/jats:p>\n\t\t\t\t<\/jats:sec>","DOI":"10.1163\/156853810791069001","type":"journal-article","created":{"date-parts":[[2010,4,8]],"date-time":"2010-04-08T23:29:18Z","timestamp":1270769358000},"page":"195-212","source":"Crossref","is-referenced-by-count":27,"title":["Spatial and temporal segregation allows coexistence in a hybrid zone among two Mediterranean vipers (Vipera aspis and V. latastei)"],"prefix":"10.1163","volume":"31","author":[{"given":"Fernando","family":"Mart\u00ednez-Freir\u00eda","sequence":"first","affiliation":[{"name":"3Departamento de Biolog\u00eda Animal, Parasitolog\u00eda, Ecolog\u00eda, Edafolog\u00eda y Qu\u00edmica Agr\u00edcola, Facultad de Biolog\u00eda, Universidad de Salamanca, Campus Miguel de Unamuno, 37007 Salamanca, Spain;, Email: fmartinez_freiria@yahoo.es"}]},{"given":"Miguel","family":"Lizana","sequence":"additional","affiliation":[{"name":"2Departamento de Biolog\u00eda Animal, Parasitolog\u00eda, Ecolog\u00eda, Edafolog\u00eda y Qu\u00edmica Agr\u00edcola, Facultad de Biolog\u00eda, Universidad de Salamanca, Campus Miguel de Unamuno, 37007 Salamanca, Spain"}]},{"given":"Jos\u00e9 Pedro do","family":"Amaral","sequence":"additional","affiliation":[{"name":"4Western Kentucky University, Biology Department, Bowling Green, KY 42101, USA, Centro de Biologia Ambiental, FCUL, Campo Grande C2, 1749-016 Lisboa, Portugal"}]},{"given":"Jos\u00e9 C.","family":"Brito","sequence":"additional","affiliation":[{"name":"1CIBIO, Centro de Investiga\u00e7\u00e3o em Biodiversidade e Recursos Gen\u00e9ticos, Campus Agr\u00e1rio de Vair\u00e3o, R. Padre Armando Quintas, 4485-661 Vair\u00e3o, Portugal"}]}],"member":"374","container-title":["Amphibia-Reptilia"],"original-title":[],"link":[{"URL":"https:\/\/brill.com\/view\/journals\/amre\/31\/2\/article-p195_5.xml","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/brill.com\/downloadpdf\/journals\/amre\/31\/2\/article-p195_5.xml","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2021,9,14]],"date-time":"2021-09-14T03:46:06Z","timestamp":1631591166000},"score":1,"resource":{"primary":{"URL":"https:\/\/brill.com\/view\/journals\/amre\/31\/2\/article-p195_5.xml"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2010]]},"references-count":0,"journal-issue":{"issue":"2"},"URL":"https:\/\/doi.org\/10.1163\/156853810791069001","relation":{},"ISSN":["0173-5373","1568-5381"],"issn-type":[{"value":"0173-5373","type":"print"},{"value":"1568-5381","type":"electronic"}],"subject":[],"published":{"date-parts":[[2010]]}}}