Results 71 to 80 of about 225 (136)

Sílidos (Syllidae: Polychaeta) del Parque Nacional de Coiba (Pacífico, Panamá)

Revista de Biología Tropical, 2006
Durante un estudio sobre la fauna marina del Parque Nacional de Coiba (Panamá) se identificaron 281 ejemplares de sílidos (Annelida: Polychaeta) intersticiales pertenecientes a 19 especies. Dos son nuevas citas para el Pacífico, Exogone (Exogone) arenosa
María Teresa Aguado
doaj  

Early origin of viviparity in the mammalian lineage

Frontiers in Mammal Science
Viviparity is a reproductive mode in which the embryo completes their development inside the female body. Present-day mammals, with the exception of monotremes, are viviparous, as opposed to the egg-laying reproductive mode of most vertebrates.
Leandro Carlos Gaetano, Leandro Carlos Gaetano, María de los Ángeles Miceli Baro, Ignacio Alejandro Cerda, Adriana Cecilia Mancuso   +4 more
doaj   +1 more source

Geographical distribution and phoretic associations of the viviparous nematode Tokorhabditis atripennis with Onthophagus dung beetles in Japan

Journal of Nematology
Viviparity is generally considered to be rare in animals. In nematodes, only six species of Rhabditida are viviparous. Five of these species have been identified in association with Onthophagus dung beetles, with Tokorhabditis atripennis being repeatedly
Ikeda Yuya, Koike Yuto, Shinya Ryoji, Hasegawa Koichi   +3 more
doaj   +1 more source

On a viviparous Sea-Urchin [PDF]

Annals and Magazine of Natural History
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openaire   +1 more source

Long‐Term Sperm Storage in a Superfetatious Live‐Bearing Fish (Poeciliopsis gracilis, Poeciliidae)

Ecology and Evolution
Sperm storage is a post‐copulatory strategy by which females can improve their fecundity by creating asynchrony between mating and fertilization. Sperm storage duration varies across vertebrate species, wherein longer sperm storage is thought to coincide
T. R. Ernst, R. M. H. W. Hogers, P. J. C. Kwant, A. Korosi, J. L. vanLeeuwen, A. Kotrschal, B. J. A. Pollux   +6 more
doaj   +1 more source

Development of thirty-four new microsatellite loci and multiplexing of seven existing loci for Zootoca vivipara (Squamata: Lacertidae)

Phyllomedusa: Journal of Herpetology, 2017
Few microsatellite loci exist for the European common lizard, Zootoca vivipara, a common model species in studies of population dynamics, sexual selection, population genetics, parity evolution, and physiology. The existing primers did not amplify in all
Jose Luis Horreo, Maria Luisa Peláez, Teresa Suárez, Benoit Heulin, Patrick Stefan Fitze   +4 more
doaj  

Editorial: Ecology, Evolution, and Behavior of Viviparous Fishes

Frontiers in Ecology and Evolution, 2022
J. Jaime Zúñiga-Vega, Andrea S. Aspbury, Jerald B. Johnson, Bart J. A. Pollux   +3 more
doaj   +1 more source

Notes on the reproduction and thermal biology of Porthidium ophryomegas (Serpentes: Viperidae)

Phyllomedusa: Journal of Herpetology, 2020
Manfredo A. Turcios-Casco, Alejandro Velásquez, Nadienhka W. Casco-Raudales, José A. Soler-Orellana   +3 more
doaj  

Viviparous Fishes

Neotropical Ichthyology, 2006
openaire   +4 more sources

Ovoviviparity and viviparity in the Diptera

Biological Reviews, 1999
ABSTRACTThe taxonomic distribution and evolution of viviparity in Diptera is critically reviewed. The phenomenon ranges from ovoviviparity (eggs deposited at an advanced stage of embryonic development; larva emerges immediately after deposition), through viviparity (larva hatches inside female before deposition) to pupiparity (offspring deposited as ...
Rudolf Meier
exaly   +3 more sources