2005
DOI: 10.1590/s1516-89132005000100011
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Abstract: The objective of this study was to analyze the maternal-embryonic relationship in eight hybrids Poeciliopsis monacha-lucida. Two natural hybrids (MLVII and MLVIII) collected in Mexico, and in a repertory of six hybrids produced by artificial insemination (A1, A4, B1, B2, E1, and E2) were analyzed. Dry weight of mature eggs and of embryos was significantly different among hybrids. All hybrids but B1 and E2 exhibited superfetation andlecithotrophy. This result showed that the association between superfetation an… Show more

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Cited by 12 publications
(10 citation statements)
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References 29 publications
(50 reference statements)
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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%
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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%
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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%
“…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%