{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,7,30]],"date-time":"2025-07-30T12:38:00Z","timestamp":1753879080025,"version":"3.41.2"},"reference-count":80,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2024,11,17]],"date-time":"2024-11-17T00:00:00Z","timestamp":1731801600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100006087","name":"Direcci\u00f3n General de Asuntos del Personal Acad\u00e9mico, Universidad Nacional Aut\u00f3noma de M\u00e9xico","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100006087","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal of Fish Diseases"],"published-print":{"date-parts":[[2025,2]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:p>Life history theory predicts that a trade\u2010off may occur when an increased investment in one fitness component causes a reduced investment in another. Parasites generate changes in the optimal life history traits of organisms, causing compromises for their hosts. The objective of this research was to determine whether trematodes <jats:italic>Clinostomum<\/jats:italic> sp. and <jats:italic>Uvulifer<\/jats:italic> sp. inflict measurable damage on the males of the viviparous fish <jats:italic>Poeciliopsis infans<\/jats:italic>, generating trade\u2010offs between somatic condition and reproductive traits (gonad mass and gonopodium length). We found (i) a negative relationship of large encysted metacercariae and non\u2010encysted metacercariae on somatic condition. Interestingly, individuals with a higher parasite load had a worse body condition, but bigger gonads and longer gonopodium; and, (ii) a bond between small encysted metacercariae and non\u2010encysted metacercariae with smaller gonopodia, only in fish with poorer somatic condition. The strongest correlation was given by the non\u2010encysted metacercariae, probably due to mechanical damage during migration through the body cavity. We did not find any trade\u2010off effects of <jats:italic>Uvulifer<\/jats:italic> sp. We consider that the statistical effects found on somatic condition can be attributed to a greater reproductive investment, generating energetic costs that compromise their defences against infection, allowing a greater parasite load.<\/jats:p>","DOI":"10.1111\/jfd.14038","type":"journal-article","created":{"date-parts":[[2024,11,18]],"date-time":"2024-11-18T07:34:05Z","timestamp":1731915245000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Does the Infestation by Trematode Parasites Influence Trade\u2010Offs Between Somatic Condition and Male Reproductive Traits in a Viviparous Fish?"],"prefix":"10.1111","volume":"48","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3017-5114","authenticated-orcid":false,"given":"Omar","family":"Dom\u00ednguez\u2010Castanedo","sequence":"first","affiliation":[{"name":"Laboratorio de Ecolog\u00eda Evolutiva y Demograf\u00eda Animal, Departamento de Ecolog\u00eda y Recursos Naturales, Facultad de Ciencias Universidad Nacional Aut\u00f3noma de M\u00e9xico  Mexico City Mexico"},{"name":"Asociaci\u00f3n Mexicana Para el Estudio y Conservaci\u00f3n de Cyprinodontiformes  Mexico City Mexico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jorge","family":"Gaspar\u2010Navarro","sequence":"additional","affiliation":[{"name":"Laboratorio de Sanidad Acu\u00edcola y Parasitolog\u00eda Molecular, Departamento El Hombre y Su Ambiente Universidad Aut\u00f3noma Metropolitana, Unidad Xochimilco  Mexico City Mexico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9661-1521","authenticated-orcid":false,"given":"J. 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