Resource Allocation in Offspring Provisioning: An Evaluation of the Conditions Favoring the Evolution of Matrotrophy

@article{Trexler2003ResourceAI,
  title={Resource Allocation in Offspring Provisioning: An Evaluation of the Conditions Favoring the Evolution of Matrotrophy},
  author={Joel C. Trexler and Donald L. DeAngelis},
  journal={The American Naturalist},
  year={2003},
  volume={162},
  pages={574 - 585}
}
We used analytic and simulation models to determine the ecological conditions favoring evolution of a matrotrophic fish from a lecithotrophic ancestor given a complex set of trade‐offs. Matrotrophy is the nourishment of viviparous embryos by resources provided between fertilization and parturition, while lecithotrophy describes embryo nourishment provided before fertilization. In fishes and reptiles, embryo nourishment encompasses a continuum from solely lecithotrophic to primarily matrotrophic… 

Examination of the Trexler-DeAngelis Model of Maternal Provisioning Reveals That Matrotrophy Is Costly

The evolution of matrotrophy (post-fertilization maternal provisioning to developing embryos) has been explained through several hypotheses. Trexler and DeAngelis proposed in 2003 a theoretical model

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It is suggested that high food abundance and ability to abort and cannibalize poor-quality offspring are permissive factors necessary for placentotrophy to be a viable strategy of reproductive allocation.

Matrotrophy limits a female’s ability to adaptively adjust offspring size and fecundity in fluctuating environments

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Parent-offspring conflict, ecology, and life history diversification of livebearing fishes

It is proposed that natural selection mediated by resource availability counterbalances conflict-fueled—potentially maladaptive—increases in matrotrophy.

Effects of Maternal Basking and Food Quantity during Gestation Provide Evidence for the Selective Advantage of Matrotrophy in a Viviparous Lizard

The first evidence that an interaction between maternal thermal and maternal food conditions during gestation strongly affects offspring phenotype is provided, including date of birth, body size and performance ability, which affect offspring fitness is provided.

Evolutionary Diversification of Reproductive Modes in Livebearing Fishes

Three studies find correlates between placental matrotrophy and other life history traits, but the only common correlate found was a reduction in reproductive allocation, which adds to the difficulties of explaining the evolution of the placenta within the constraints of the Trexler-DeAngelis model.

Remarkable Shifts in Offspring Provisioning during Gestation in a Live-Bearing Cnidarian

The brooding sea anemone Aulactinia stella is studied, using behavioural, morphological and biochemical indicators of offspring phenotype to characterize gestation and elucidate parental and sibling relationships, highlighting matrotrophic and conflict-driven mechanisms acting on offspring phenotype during gestation.
...

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