Maternal investment in the swordtail fish Xiphophorus multilineatus: support for the differential allocation hypothesis.

The differential allocation hypothesis predicts that reproductive investment will be influenced by mate attractiveness, given a cost to reproduction and a tradeoff between current and future reproduction. We tested the differential allocation hypothesis in the swordtail fish Xiphophorus multilineatu...

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Autores principales:	Oscar Rios-Cardenas, Jason Brewer, Molly R Morris
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/7003356492a24d618a5d4173f03b0616
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spelling	oai:doaj.org-article:7003356492a24d618a5d4173f03b06162021-11-18T08:42:51ZMaternal investment in the swordtail fish Xiphophorus multilineatus: support for the differential allocation hypothesis.1932-620310.1371/journal.pone.0082723https://doaj.org/article/7003356492a24d618a5d4173f03b06162013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24349348/?tool=EBIhttps://doaj.org/toc/1932-6203The differential allocation hypothesis predicts that reproductive investment will be influenced by mate attractiveness, given a cost to reproduction and a tradeoff between current and future reproduction. We tested the differential allocation hypothesis in the swordtail fish Xiphophorus multilineatus, where males have genetically influenced (patroclinous inheritance) alternative mating tactics (ARTs) maintained by a tradeoff between being more attractive to females (mature later as larger courting males) and a higher probability of reaching sexual maturity (mature earlier as smaller sneaker males). Males in X. multilineatus do not provide parental care or other resources to the offspring. Allelic variation and copy number of the Mc4R gene on the Y-chromosome influences the size differences between males, however there is no variation in this gene on the X-chromosome. Therefore, to determine if mothers invested more in offspring of the larger courter males, we examined age to sexual maturity for daughters. We confirmed a tradeoff between number of offspring and female offspring's age to sexual maturity, corroborating that there is a cost to reproduction. In addition, the ART of their fathers significantly influenced the age at which daughters reached sexual maturity, suggesting increased maternal investment to daughters of courter males. The differential allocation we detected was influenced by how long the wild-caught mother had been in the laboratory, as there was a brood order by father genotype (ART) interaction. These results suggest that females can adjust their reproductive investment strategy, and that differential allocation is context specific. We hypothesize that one of two aspects of laboratory conditions produced this shift: increased female condition due to higher quality diet, and/or assessment of future mating opportunities due to isolation from males.Oscar Rios-CardenasJason BrewerMolly R MorrisPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 12, p e82723 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Oscar Rios-Cardenas Jason Brewer Molly R Morris Maternal investment in the swordtail fish Xiphophorus multilineatus: support for the differential allocation hypothesis.
description	The differential allocation hypothesis predicts that reproductive investment will be influenced by mate attractiveness, given a cost to reproduction and a tradeoff between current and future reproduction. We tested the differential allocation hypothesis in the swordtail fish Xiphophorus multilineatus, where males have genetically influenced (patroclinous inheritance) alternative mating tactics (ARTs) maintained by a tradeoff between being more attractive to females (mature later as larger courting males) and a higher probability of reaching sexual maturity (mature earlier as smaller sneaker males). Males in X. multilineatus do not provide parental care or other resources to the offspring. Allelic variation and copy number of the Mc4R gene on the Y-chromosome influences the size differences between males, however there is no variation in this gene on the X-chromosome. Therefore, to determine if mothers invested more in offspring of the larger courter males, we examined age to sexual maturity for daughters. We confirmed a tradeoff between number of offspring and female offspring's age to sexual maturity, corroborating that there is a cost to reproduction. In addition, the ART of their fathers significantly influenced the age at which daughters reached sexual maturity, suggesting increased maternal investment to daughters of courter males. The differential allocation we detected was influenced by how long the wild-caught mother had been in the laboratory, as there was a brood order by father genotype (ART) interaction. These results suggest that females can adjust their reproductive investment strategy, and that differential allocation is context specific. We hypothesize that one of two aspects of laboratory conditions produced this shift: increased female condition due to higher quality diet, and/or assessment of future mating opportunities due to isolation from males.
format	article
author	Oscar Rios-Cardenas Jason Brewer Molly R Morris
author_facet	Oscar Rios-Cardenas Jason Brewer Molly R Morris
author_sort	Oscar Rios-Cardenas
title	Maternal investment in the swordtail fish Xiphophorus multilineatus: support for the differential allocation hypothesis.
title_short	Maternal investment in the swordtail fish Xiphophorus multilineatus: support for the differential allocation hypothesis.
title_full	Maternal investment in the swordtail fish Xiphophorus multilineatus: support for the differential allocation hypothesis.
title_fullStr	Maternal investment in the swordtail fish Xiphophorus multilineatus: support for the differential allocation hypothesis.
title_full_unstemmed	Maternal investment in the swordtail fish Xiphophorus multilineatus: support for the differential allocation hypothesis.
title_sort	maternal investment in the swordtail fish xiphophorus multilineatus: support for the differential allocation hypothesis.
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/7003356492a24d618a5d4173f03b0616
work_keys_str_mv	AT oscarrioscardenas maternalinvestmentintheswordtailfishxiphophorusmultilineatussupportforthedifferentialallocationhypothesis AT jasonbrewer maternalinvestmentintheswordtailfishxiphophorusmultilineatussupportforthedifferentialallocationhypothesis AT mollyrmorris maternalinvestmentintheswordtailfishxiphophorusmultilineatussupportforthedifferentialallocationhypothesis
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Maternal investment in the swordtail fish Xiphophorus multilineatus: support for the differential allocation hypothesis.

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