Results 41 to 50 of about 1,879 (181)
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 +2 more
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Low microbial abundance and community diversity in the egg capsule of the oviparous cloudy catshark (Scyliorhinus torazame) during oviposition. [PDF]
Environ Microbiol RepThis research reveals that embryos of the oviparous cloudy catshark (Scyliorhinus torazame) acquire pathogen resistance by Stage 30. The intracapsular environment of freshly laid eggs exhibits low microbial abundance and diversity. This clean environment persists until the early opening of the capsule, suggesting its critical role in protecting ...
Takagi W +5 more
europepmc +2 more sources
Terrestrial gastropods - how do they reproduce? [PDF]
Invertebrate Survival Journal, 2017 Molluscs are the most diverse group in respect of sexual systems and strategies. They can be dioecious with separate sexes or hermaphroditic. Within hermaphroditism, it is possible to distinguish a number of modifications of this type of reproduction ...
K S Zajac, P E Kramarz
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Embryonic Growth and Yolk Depletion during Incubation in the Chinese Skink, Plestiodon chinensis [PDF]
, 2019 We collected 24 gravid female Chinese skinks (Plestiodon chinensis) to study embryonic growth and yolk depletion during incubation. Females laid eggs between late May and mid-June. Eggs were incubated at 24 (± 0.3) °C.
Kun GUO, Li MA, Shan SU, Xiang JI
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Revista Mexicana de Biodiversidad, 2012 Egg retention (ER) and intrauterine embryonic development (IED) have been considered intermediate steps in the evolution from oviparity to viviparity. Sceloporus aeneus is an oviparous lizard that is closely related to the viviparous species (Sceloporus ...
Rodolfo García-Collazo +4 more
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Liochlorophis, L. vernalis [PDF]
, 2003 Number of Pages: 13Integrative BiologyGeological ...
Walley, Harlan D.
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THE NON-OVIPAROUS FEMALE HOOKWORM [PDF]
JAMA: The Journal of the American Medical Association, 1910 In every higher animal we recognize certain more or less definite periods of physiologic activity, and we roughly divide the span of life into three stages, which are in no way sharply outlined. These we call the stages of youth, adolescence, and old age.
openaire +1 more source
Insect Molecular Biology, EarlyView.Duplication of vas genes is universally observed in aphids, and phylogenetic analysis indicates that this event predates the divergence of Aphididae and Phylloxeridae. Ap‐vas1 is germline‐specific, whereas Ap‐vas2–4 exhibit somatic expression, indicating functional divergence during aphid embryogenesis.
Gee‐Way Lin +4 more
wiley +1 more source
Effect of different feeds and water salinities on the cyst production of brine shrimp, Artemia sp. [PDF]
, 2002 Effect of different feeds and salinities on cyst production in Artemia sp. was studied. Among the 12 different feeds used, ragi powder suspension showed the best growth and cyst production.
Joshi, V.P., Vartak, V.R.
core
Is Ginkgo biloba (Ginkgoaceae) really an oviparous plant? [PDF]
American Journal of Botany, 1997 Germination of Ginkgo biloba seeds with intact and removed sarcotesta was compared to test the role of the seed coat in germination biology. The presence of an intact sarcotesta significantly reduced total germination percentage when compared to seeds with the sarcotesta removed. Some seeds were also cold stratified.
B, Holt, G, Rothwell
openaire +2 more sources