Variations on maternal-embryonic relationship in two natural and six laboratory made hybrids of Poeciliopsis monacha-lucida (Pisces, Cyprinodontiformes)

Lima, Neuza Rejane Wille

doi:10.1590/s1516-89132005000100011

Cited by 12 publications

(10 citation statements)

References 29 publications

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“…Three hypotheses might explain the latter result: (1) lecithotrophy is strictly dominant to matrotrophy; (2) maternal provisioning is maternally inherited; and (3) maternal provisioning is shaped by natural selection via the differential survival of hybrid clones. Lima's (2005) observation that ML hybrids synthesized de novo in the laboratory could be either lecithotrophic or matrotrophic allows us to reject the first two hypotheses. The allotriploids, MML and MLL, have not been generated in the laboratory; consequently, the expression of maternal provisioning in de novo triploids is unknown.…”

Section: Discussionmentioning

confidence: 91%

“…Lima (2005) exploited the latter benefit in her study of post‐fertilization maternal provisioning in laboratory‐synthesized ML strains. She examined eight strains, and found two that were matrotrophic (embryos gained 27·0 and 28·8% dry weight during development) and six that were variably lecithotrophic (embryos lost 6·9 to 25·9% dry weight).…”

Section: Introductionmentioning

confidence: 99%

“…A useful feature of the allodiploid and allotriploid biotypes for ecological studies is the clonal diversity that they exhibit in nature (Vrijenhoek 1979), but perhaps their greatest utility resides in the relative ease in which new clonal diploid hybrids can be synthesized in the laboratory, clones that have not been 'purified' yet by natural selection (Wetherington et al 1989). Lima (2005) exploited the latter benefit in her study of postfertilization maternal provisioning in laboratory-synthesized ML strains. She examined eight strains, and found two that were matrotrophic (embryos gained 27·0 and 28·8% dry weight during development) and six that were variably lecithotrophic (embryos lost 6·9 to 25·9% dry weight).…”

Section: Introductionmentioning

confidence: 99%

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Pre‐ and post‐fertilization maternal provisioning in livebearing fish species and their hybrids (Poeciliidae: Poeciliopsis)

et al. 2008

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Summary 1.Viviparous organisms vary greatly in their level of post-fertilization maternal provisioning and extensive provisioning (including very complex placentas) has evolved dozens of times in vertebrates. Through the use of species representing transitional states we aim to explore and develop empirically supported hypotheses that explain how such a complex trait has evolved. 2. In this study, we investigated the life histories and patterns of post-fertilization maternal provisioning in naturally occurring, all-female, hybrids between Poeciliopsis monacha , a viviparous species that produces large eggs and nourishes its embryos via stored yolk (lecithotrophy) and P. lucida , which produces small eggs and nourishes its embryos after fertilization via a follicular placenta (matrotrophy). Hybrids can be diploid or triploid, leading to different levels of gene dosage from the parental species. 3. We found that the extent of superfetation and average brood size of the hybrids did not differ significantly from their sexual parental species even though the latter was much lower in the hybrids. Moreover, the allodiploid, P. monacha-lucida , has intermediate sized eggs, whereas the allotriploid, P. monacha-monacha-lucida , produces eggs of similar size to those of P. monacha . The degree of post-fertilization maternal provisioning was unrelated to genomic dosages, with wild-caught hybrids being lecithotrophic, as seen in the maternal species ( P. monacha ). 4. Our results with naturally occurring P. monacha-lucida hybrids differed from those obtained with laboratory-synthesized hybrid clones, which were either lecithotrophic or weakly matrotrophic. Consequently, we propose two non-mutually exclusive hypotheses to explain why lecithotrophic clones might be favoured in the wild. One hypothesis suggests that lecithotrophic hybrids minimize competition with the matrotrophic paternal sexual species from which they require sperm to reproduce. Alternatively, we propose that natural selection has eliminated matrotrophic hybrids that suffer from intergenomic conflict in the degree of post-fertilization maternal provisioning. 5. We have thus identified an empirical system and developed testable hypotheses that will help elucidate the selective pressures that caused the evolution of post-fertilization maternal provisioning and potentially provide an opportunity to explore how epigenetic factors (e.g., intergenomic conflict) might influence this complex trait.

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Section: Discussionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Pre‐ and post‐fertilization maternal provisioning in livebearing fish species and their hybrids (Poeciliidae: Poeciliopsis)

et al. 2008

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“…The matrotrophy index is a measure of the degree of maternal provisioning to the embryos, with higher MI values indicative of greater maternal investment (Wourms et al 1988). Almost all livebearing fish with superfetation show matrotrophy (Reznick and Miles 1989, but see Lima 2005), yet it is not clear if there is an association between superfetation and matrotrophy within a single species.…”

Section: Methodsmentioning

confidence: 99%

Habitat predicts reproductive superfetation and body shape in the livebearing fish Poeciliopsis turrubarensis

Zúñiga‐Vega¹,

Reznick²,

Johnson³

2007

Oikos

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Superfetation, the ability of females to simultaneously carry more than one brood at different developmental stages, is an unusual reproductive strategy that has independently evolved several times in the livebearing fish family Poeciliidae. Why this strategy has evolved remains uncertain. One hypothesis is that superfetation is a response to selective pressures that constrain the physical space within a female in which her offspring can develop. This hypothesis is reasonable, because superfetation should reduce the total volume needed to house developing embryos Á that is, fewer large, fully developed embryos will be held by a superfetating female (with several broods at different developmental stages) than a non-superfetating female (where all embryos reach a fully developed stage at the same time).In this study, we explore this 'morphological constraint' hypothesis of superfetation by examining the livebearing fish, Poeciliopsis turrubarensis . We found that populations vary markedly in degree of superfetation, with individuals carrying from two to four distinct broods across different geographic areas. These populations also occupy a range of habitat types: some populations occur in slow moving coastal rivers near the ocean, while other populations occur far inland in fast moving waters that drain steep mountain environments. In comparing populations from these two types of environments, we find a strong association between stream habitat type and the degree of superfetation within populations. Fish from inland populations have higher levels of superfetation than their coastal counterparts. In addition, geometric morphometric analysis revealed that inland populations are also more fusiform than fish from coastal locations. Combined, these two lines of evidence support the 'morphological constraint' hypothesis, and suggest that the life history strategy of superfetation could be driven by environmental pressures that favor a more streamlined phenotype.

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“…The production of fewer young is associated with the larger size, more advanced development and hence greater independence of poeciliid embryos upon parturition (Scrimshaw 1946). Also, egg size (ES) has critical importance for the development of poeciliid fishes (Scrimshaw 1946;Thibault & Schultz 1978;Haynes 1995;Reznick et al 1996a,b) and is strongly related with the modes of embryonic nourishment (Wourms et al 1988;Trexler 1997;Lima 2005;Turcotte et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Egg size and its relationship with fecundity, newborn length and female size in Cuban poeciliid fishes (Teleostei: Cyprinodontiformes)

León

Rodríguez

Acosta

et al. 2011

Ecology of Freshwater Fish

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This study describes the relationship between egg size (ES) and brood size (BS), newborn length (NL) and female total length (FTL) in ten species of Cuban poeciliids. Variability and the level of association among variables are analysed and comparisons of ES among species established. Egg size has the lowest variability among the analysed variables and in most species is not correlated with BS, when the effect of FTL is controlled. Cuban poeciliids, thought to be primarily lecithotrophic, can be separated in two groups according to ES, NL and BS relative to FTL. One such group inhabits mountain streams and produces large eggs and small broods. The other group is distributed in lowland wetlands and produces small eggs and large broods. In Cuban poeciliids, ES and NL are highly correlated, which suggests adaptive value for ES.

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Variations on maternal-embryonic relationship in two natural and six laboratory made hybrids of Poeciliopsis monacha-lucida (Pisces, Cyprinodontiformes)

Cited by 12 publications

References 29 publications

Pre‐ and post‐fertilization maternal provisioning in livebearing fish species and their hybrids (Poeciliidae: Poeciliopsis)

Pre‐ and post‐fertilization maternal provisioning in livebearing fish species and their hybrids (Poeciliidae: Poeciliopsis)

Habitat predicts reproductive superfetation and body shape in the livebearing fish Poeciliopsis turrubarensis

Egg size and its relationship with fecundity, newborn length and female size in Cuban poeciliid fishes (Teleostei: Cyprinodontiformes)

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