Results 31 to 40 of about 5,209 (201)

Evolution of lizard viviparity

open access: yesNature Ecology & Evolution, 2021
Analysis of oviparous and viviparous individuals of the common lizard reveals the genetic architecture of pregnancy.
openaire   +4 more sources

Harvest Season and Morphological Variation of Canistel (Pouteria campechiana) Fruit and Leaves Collected in Different Zones of Mexico

open access: yesHorticulturae, 2023
Canistel (Pouteria campechiana (Kunth) Baehni; yellow sapote, canistel) is an edible fruit that is native to Mexico; the tree is used as an ornamental and medicinal plant.
Karen M. Granados-Vega   +5 more
doaj   +1 more source

Foliculogénesis Ovárica en la Raya Marmorada, Sympterygia bonapartii (Müller & Henle, 1841) (Chondrichthyes, Rajidae) [PDF]

open access: yes, 2011
Los Condrictios se han convertido en un recurso económico importante en las últimas décadas, siendo Argentina uno de los países que más explota tiburones y rayas, incluso a niveles que exceden los límites de varias especies.
Díaz Andrade, María Constanza   +3 more
core   +1 more source

Embryos of the viviparous dermapteran, Arixenia esau develop sequentially in two compartments: terminal ovarian follicles and the uterus.

open access: yesPLoS ONE, 2013
Three main reproductive strategies have been described among insects: most common oviparity, ovoviviparity and viviparity. In the latter strategy, the embryonic development takes place within the body of the mother which provides gas exchange and ...
Waclaw Tworzydlo   +2 more
doaj   +1 more source

Anatomy of the female reproductive system and sperm storage of the viviparous caecilian Typhlonectes natans (Gymnophiona: Typhlonectidae)

open access: yesActa Biologica, 2018
Here, we describe the anatomy of the female reproductive system of the aquatic, viviparous caecilian Typhlonectes natans. We conducted our research on two adult females using light microscopy and reflected our results with the available literature data ...
Jakub Dymek, Anna Dymek, Artur Osikowski
doaj   +1 more source

Climate, geographic distribution and viviparity in Liolaemus (Reptilia; Squamata) species: when hypotheses need to be tested [PDF]

open access: yes, 2014
La distribución de los reptiles, dada su dependencia de la temperatura, puede verse restringida en función del clima. En particular, se han planteado tres hipótesis que vinculan el clima con la distribución y el viviparismo en las especies de reptiles: i)
Abdala, Cristian Simón   +5 more
core   +3 more sources

Reptilian Viviparity and Dollo's Law [PDF]

open access: yesEvolution, 1998
It has been suggested repeatedly that the evolutionary transition from oviparity (egg-laying) to viviparity (live-bearing) in reptiles is irreversible. However, these adaptive arguments have yet to be tested by detailed examination of the phylogenetic distribution of oviparity and viviparity across a broad range of taxa.
Michael S Y, Lee, Richard, Shine
openaire   +2 more sources

Effects of maternal basking and food quantity during gestation provide evidence for the selective advantage of matrotrophy in a viviparous lizard. [PDF]

open access: yesPLoS ONE, 2012
The evolution of matrotrophy (i.e., direct supply of nutrients by the mother during gestation) may be associated with high maternal energy availability during gestation. However, we lack knowledge about the selective advantages of matrotrophic viviparity
Keisuke Itonaga   +2 more
doaj   +1 more source

Reproductive Mode and Conflict Shape the Evolution of Male Attributes and Rate of Speciation in the Fish Family Poeciliidae

open access: yesFrontiers in Ecology and Evolution, 2021
Sexual conflict is caused by differences between the sexes in how fitness is maximized. These differences are shaped by the discrepancy in the investment in gametes, how mates are chosen and how embryos and young are provided for.
David N. Reznick   +3 more
doaj   +1 more source

Sceloporus megalepidurus [PDF]

open access: yes, 2006
Number of Pages: 5Integrative BiologyGeological ...
Chiszar, David   +4 more
core   +1 more source

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