Results 31 to 40 of about 1,917 (204)

Liochlorophis, L. vernalis [PDF]

, 2003
Number of Pages: 13Integrative BiologyGeological ...
Walley, Harlan D.
core   +1 more source

Molecular mechanism of nutrient uptake in developing embryos of oviparous cloudy catshark (Scyliorhinus torazame)

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, Nobuhiro Ogawa, Marty Kwok-Shing Wong, Kotaro Tokunaga, Shigehiro Kuraku, Susumu Hyodo, Wataru Takagi   +6 more
doaj   +3 more sources

Skrjabinelazia rizzoi n. sp. (Nematoda: Seuratoidea) from a Sicilian lacertid, with comments on specific and biological diversity in the genus

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, Brown-Peterson, Canario, Dahle, Eldridge, Grier, Grier, Guerreiro, Howell, Hureau, Kime, Kobayashi, Liley, Matsuyama, Muñoz, Muñoz, Nagahama, Rinchard, Schulz, Scott, Sequeira, Sequeira, Sequeira, Sequeira, Shimizu, Shinomiya, Takano, Vila, Wallace, West, Wourms   +30 more
core   +1 more source

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., Dubey, S., Salamin, N., Schuerch, J.   +3 more
core   +2 more sources

Evolutionary transitions in body plan and reproductive mode alter maintenance metabolism in squamates

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, Kun Guo, Guang-Zheng Zhang, Long-Hui Lin, Xiang Ji   +4 more
doaj   +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   +4 more sources

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, Yan-Fu Qu, Xue-Ji Wang, Jian-Fang Gao, Xiang Ji   +4 more
doaj   +1 more source

Viviparous mothers impose stronger glucocorticoid‐mediated maternal stress effects on their offspring than oviparous mothers

Ecology and Evolution, 2021
Maternal stress during gestation has the potential to affect offspring development via changes in maternal physiology, such as increases in circulating levels of glucocorticoid hormones that are typical after exposure to a stressor.
Kirsty J. MacLeod, Geoffrey M. While, Tobias Uller   +2 more
doaj   +1 more source

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., Castro J. A., Coelho R., Davenport I. R., Dodd J. M., Fernanda O. Lana, Fábio H. V. Hazin, Hamlett W. C., Hamlett W. C., Hazin F. H. V., Joaquim Evêncio Neto, Keilla Regina L. S. Torres, Koob T. J., Maria Goretti Soares, Mariana G. Rêgo, Matthews L. H., Natália L. Santos, P. G. V. Oliveira, Pollyana C. G. Roque, Pratt H. L., Rui Coelho, Stehmann M. F. W., Teshima K., Wourms J. P., Wourms J. P.   +24 more
core   +2 more sources