Results 21 to 30 of about 204 (115)

Hormones and Reproductive Cycles in Snakes [PDF]

, 2010
The study of the hormonal regulation of reproduction in snakes is in its infancy. Studies have disproportionately examined temperate zone viperid and colubrid snakes, especially the red-sided garter snake (Thamnophis sirtalis parietalis).
Aldridge, Aldridge, Almeida-Santos, Andrén, Aubret, Bishop, Bluhm, Bona-Gallo, Bonnet, Brown, Callard, Callard, Camazine, Cease, Chiu, Crews, Crews, Crews, Crews, Crews, Crews, Crews, Crews, Crews, Custodia-Lora, Dawson, DeNardo, Dowling, Drent, Dubach, Dunham, Duvall, El-Deib, Ford, Ford, Ford, Friedman, Friedman, Garstka, Garstka, Gorman, Graham, Greene, Greene, Gregory, Groot, Haldar, Hawley, Hawley, Ho, Janzen, Johnson, Joy, King, Kleis-San Francisco, Krohmer, Krohmer, Krohmer, Krohmer, Krohmer, Krohmer, LeMaster, LeMaster, LeMaster, Lerner, Licht, Licht, Licht, Licht, Licht, Licht, Lofts, Lourdais, Lutterschmidt, Lutterschmidt, Lutterschmidt, Madsen, Madsen, Mason, Mason, Mason, Mathies, Mead, Mendonça, Mendonça, Mendonça, Mendonça, Mendonça, Mendonça, Mendonça, Mendonça, Moore, Moore, Moore, Moore, Moore, Moore, Naulleau, Naulleau, Naulleau, Naulleau, Nelson, Ng, Ng, Nozaki, O'Donnell, Osypka, Ota, Pang, Panzica, Paolucci, Price, Radder, Reed, Riley, Riley, Robert, Roselli, Saint Girons, Saint Girons, Schuett, Schuett, Schuett, Schuett, Schuett, Schuett, Schuett, Schwabl, Sherwood, Shine, Shine, Shine, Shine, Shine, Shine, Shine, Silveira, Smith, Stevens, Tamarkin, Taylor, Taylor, Thapliyial, Tilden, Tosini, Tsai, Tsui, Tsutsui, Turner, Turner, Ubuka, Uller, Uribe, Vagell, Vitt, Weil, Weil, Whittier, Whittier, Whittier, Whittier, Whittier, Wingfield, Zaidan   +163 more
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Spermatogenesis and plasma testosterone levels under field conditions, in males of the common toad (Rhinella arenarum Hensel, 1867), from the Monte Desert, Argentina [PDF]

, 2018
The reproductive function in anurans depends on interactions between the hypothalamus, adenohypophysis and gonads, which are mediated by an endocrine circuit.
Fornes, Miguel Walter, Jahn, Graciela Alma, Quiroga, Lorena Beatriz, Sanabria, Eduardo Alfredo   +3 more
core   +1 more source

A Review of the Macroscopic, Microscopic, and Ultramicroscopic Characteristics of Some Key Oocyte Developmental Processes in Fish Species [PDF]

, 2019
Studies involving the reproductive biology of fish have several possibilities of approach, such as the understanding of gonadal development, oocyte development, and the reproductive cycle of the species. In addition, analyses of gonadal morphology can be
Cassel, Mônica
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Morphological and immunological approach for studying the distribution pattern of mitochondria and germ granules during oogenesis of the guppy (Poecilia reticulata) [PDF]

: A same set of genes is associated to germline determination and differentiation in almost all Metazoa. Previous studies in several animals, also from distantly related taxa, showed a close association between germline determinants in germ granules and ...
Cacialli P., Franceschini V., Iannello M., Lazzari M., Maurizii M. G., Milani L., Piccinini G.   +6 more
core   +1 more source

The origin of platelets enabled the evolution of eutherian placentation [PDF]

, 2019
Invasive placentation with extended pregnancy is a shared derived characteristic unique to eutherian mammals that possess a highly effective system of haemostasis, platelets. These are found in all mammals but no other group of animals.
Martin, JF, Wagner, GP
core  

The ovary of Mustelus schmitti (Chondrichthyes, Triakidae): microanatomy and development through the reproductive cycle [PDF]

, 2014
En este trabajo se describe la evolución estructural del ovario de Mustelus schmitti (gatuso) a lo largo del ciclo reproductivo. Se consideraron 3 estadios madurativos macroscópicos y se analizaron la población folicular en cada uno de e llos y la s ...
Díaz Andrade, María Constanza, Estecondo, Silvia, Fuentes, Sabrina, Galíndez, Elena Juana, Piscicelli, Juan Manuel, Wehitt, Anahí   +5 more
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Adjustment of the reproductive activity of vulnerable lizard phymaturus williamsi at high altitudes [PDF]

, 2018
In environments with cold climates, reproduction of lizards is restricted to short seasonal periods of activity, from mid-spring to early autumn. We studied the reproductive biology of Phymaturus williamsi (William’s Andean Lizard), a vulnerable and ...
Acosta, Juan Carlos, Blanco, Graciela Mirta, Boretto, Jorgelina Mariela, Castro, Susana Alejandra   +3 more
core  

Can Assisted Reproductive Technologies Help Conserve 300 Million Years of Evolution? A First Attempt at Developing These Technologies for Male Reptiles [PDF]

, 2019
Biodiversity loss is the most critical environmental problem threatening ecosystem, animal, and human health today. Increases in extinction rates have been observed over the past 50 years, with reptile losses occurring twelve times faster than ...
Perry, Sean M
core   +2 more sources

Características histológicas de los estadios de atresia de folículos ováricos en dos especies de teleósteos vivíparos: Ilyodon whitei (Meek, 1904) y Goodea atripinnis (Jordan, 1880) (Goodeidae) [PDF]

, 2017
Atresia, the process of degeneration and removal of ovarian follicles from the ovary is an essential aspect of the ovarian physiology. It plays an important role in fecundity, reducing the number of maturing oocytes. In viviparous teleosts, atresia shows
Aguilar Morales, Marcela, De la Rosa Cruz, Gabino, García Alarcón, Adriana, Guerrero-Estévez, Sandra Milena, Uribe Aranzábal, Mari Carmen   +4 more
core   +1 more source

Neural progenitors, patterning and ecology in neocortical origins [PDF]

, 2013
The anatomical organization of the mammalian neocortex stands out among vertebrates for its laminar and columnar arrangement, featuring vertically oriented, excitatory pyramidal neurons.
Aboitiz, Francisco, Zamorano, Francisco
core   +3 more sources