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In the present work, both levels of genetic variation in the broad\u2010snouted caiman (<jats:italic>Caiman latirostris<\/jats:italic>) were evaluated in small wetlands associated with the Piracicaba River and some of its tributaries in the state of S\u00e3o Paulo, Brazil. Genetic variation was determined using microsatellite DNA markers originally developed for the American alligator (<jats:italic>Alligator mississipiensis<\/jats:italic>) and previously tested in pedigreed captive broad\u2010snouted caimans. Using these markers, we were able to detect variability among individuals from different sites, even those within a small geographic distance. Genetic results suggest that the groups sampled at each site are composed predominantly of related individuals. A possible combination of high mortality and low natality rates results in a low number of successfully dispersed individuals per generation. Future studies using a recently constructed <jats:italic>Caiman latirostris<\/jats:italic> microsatellite library (Zucoloto et al., 2002) might help us to understand metapopulation processes that may be occurring within this species. <jats:italic>J. Exp. Zool. (Mol. Dev. Evol.) 294:387\u2013396, 2002<\/jats:italic>. \u00a9 2002 Wiley\u2010Liss, Inc.<\/jats:p>","DOI":"10.1002\/jez.10200","type":"journal-article","created":{"date-parts":[[2002,12,3]],"date-time":"2002-12-03T13:52:28Z","timestamp":1038923548000},"page":"387-396","source":"Crossref","is-referenced-by-count":31,"title":["Microgeographic variation in <i>Caiman latirostris<\/i>"],"prefix":"10.1002","volume":"294","author":[{"given":"Luciano Martins","family":"Verdade","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rodrigo Barban","family":"Zucoloto","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Luiz Lehmann","family":"Coutinho","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2002,12,26]]},"reference":[{"key":"e_1_2_1_2_1","first-page":"314","article-title":"Sexual dimorphism in the genital morphology of young American alligators, Alligator mississippiensis","volume":"51","author":"Allstead J","year":"1995","journal-title":"Herpetologica"},{"key":"e_1_2_1_3_1","first-page":"95","volume-title":"Memorias del IV Workshop sobre Conservaci\u00f3n y Manejo del Yacare Overo (Caiman latirostris)","author":"Aquino AL","year":"1994"},{"key":"e_1_2_1_4_1","doi-asserted-by":"publisher","DOI":"10.1007\/978-1-4615-2381-9"},{"key":"e_1_2_1_5_1","unstructured":"BrazaitisP MaddenR AmatoG RebeloG YamashitaC WatanabeME.1997.The South American and Central American caiman (Caiman) complex. 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