Results 31 to 40 of about 1,879 (181)
Pregnant Females as Historical Individuals: An Insight From the Philosophy of Evo-Devo
Frontiers in Psychology, 2021 Criticisms of the “container” model of pregnancy picturing female and embryo as separate entities multiply in various philosophical and scientific contexts during the last decades.
Laura Nuño de la Rosa +2 more
doaj +1 more source
Growth and reproduction in captivity unveils remarkable life-history plasticity in the smallnose fanskate, Sympterygia bonapartii (Chondrichthyes: Rajiformes) [PDF]
, 2018 Analizamos el crecimiento y la reproducción de ejemplares de raya marmorada, Sympterygia bonapartii nacidas en cautiverio. Se obtuvieron ovicápsulas a partir de la oviposición de dos hembras capturadas en la naturaleza y mantenidas en el Acuario Temaikèn.
Abraham, Carolina +4 more
core +3 more sources
Why are some species older than others? A large-scale study of vertebrates. [PDF]
, 2016 BACKGROUND: Strong variations are observed between and within taxonomic groups in the age of extant species and these differences can clarify factors that render species more vulnerable to extinction.
Cattin, L. +3 more
core +2 more sources
PLoS ONE, 2022 Forms of embryonic nutrition are highly diverse in cartilaginous fishes, which contain oviparity, yolk-sac viviparity and several types of matrotrophic viviparity (histotrophy, oophagy, and placentotrophy). The molecular mechanisms of embryonic nutrition
Yuki Honda +6 more
doaj +2 more sources
Morphological analysis and description of the ovaries of female silky sharks, Carcharhinus falciformis (Müller & Henle, 1839) [PDF]
, 2013 This work aims to study the female reproductive tract of silky sharks, Carcharhinus falciformis, captured in the South and Equatorial Atlantic Ocean.
Carrier J. C. +24 more
core +2 more sources
Parasite, 2008 Skrjabinelazia rizzoi n. sp. (Seuratoidea), from Podarcis sicula captured at Cammarata, Agrigento Province, Sicily, is distinct from the 13 known species of the genus, including Skrjabinelazia sp. Rizzo from Catania.
Lhermitte N., Bain O., Virga A.
doaj +1 more source
Zygoparity and sex steroid hormone profiles in bluemouth Helicolenus dactylopterus [PDF]
, 2017 Two hundred and seven individuals (103 females and 104 males) of bluemouth Helicolenus dactylopterus (Scorpaeniformes, Sebastidae), a commercially important deep-water species with an unusual reproductive strategy, from the eastern Atlantic Ocean ranging
Barcellos +30 more
core +1 more source
An Oviparous Species of Peripatus [PDF]
Nature, 1891 MR. DENDY'S observation of the extrusion of incompletely developed eggs in Peripatus is not, as he appears to think, entirely new. Captain Hutton was the first to observe it, in P. novae-zealandiae, and I confirmed his observation for the same species in my monograph of the genus.
openaire +3 more sources
BMC Evolutionary Biology, 2018 Background Energy (resources) acquired by animals should be allocated towards competing demands, maintenance, growth, reproduction and fat storage. Reproduction has the second lowest priority in energy allocation and only is allowed after meeting the ...
Lin Zhang +4 more
doaj +1 more source
Does the oviparity-viviparity transition alter the partitioning of yolk in embryonic snakes?
BMC Evolutionary Biology, 2017 Background The oviparity-viviparity transition is a major evolutionary event, likely altering the reproductive process of the organisms involved. Residual yolk, a portion of yolk remaining unutilized at hatching or birth as parental investment in care ...
Yan-Qing Wu +4 more
doaj +1 more source