Results 61 to 70 of about 1,828 (138)

Matrotrophic viviparity constrains microbiome acquisition during gestation in a live‐bearing cockroach, Diploptera punctata

open access: yesEcology and Evolution, 2019
The vertical transmission of microbes from mother to offspring is critical to the survival, development, and health of animals. Invertebrate systems offer unique opportunities to conduct studies on microbiome‐development‐reproduction dynamics since ...
Emily C. Jennings   +3 more
doaj   +1 more source

The brine shrimp Artemia: adapted to critical life conditions

open access: yesFrontiers in Physiology, 2012
The brine shrimp Artemia is a micro-crustacean, well adapted to the harsh conditions that severely hypersaline environments impose on survival and reproduction.
Gonzalo M Gajardo, John A Beardmore
doaj   +1 more source

Observations on the egg-cases of some ovo-viviparous and viviparous elasmobranchs, with a note on the formation of the elasmobranch egg-case [PDF]

open access: yes, 1951
Egg-cases of a number of oviparous Elasmobranchs have been described from time to time, the oblong egg-capsules of skates and rays being known as `skate barrows,' 'sailors' purses,' 'mermaids' purses,' and 'mermaids' pin-boxes'.
Raghu Prasad, R
core  

Transgenerational Plasticity of Maternal Hemolymph Trehalose in Aphids

open access: yesArchives of Insect Biochemistry and Physiology, Volume 118, Issue 1, January 2025.
Maternal hemolymph trehalose influences aphid transgenerational plasticity and adaptation to environmental stress. Higher trehalose levels in winged aphids are associated with increased trehalose levels in the offspring, potentially aiding resilience.
Naomi Soma, Shingo Kikuta
wiley   +1 more source

First Report of Calceostoma glandulosum (Monogenea) in Argyrosomus regius: Morphological and Molecular Characterization and Temperature Effects on Life Cycle

open access: yesAquaculture Research, Volume 2025, Issue 1, 2025.
The increase in fish production in aquaculture reflects the growth of the world population. However, this expansion is accompanied by challenges, such as the intensification of production systems through increased stocking density, which induces stress in fish, weakening their immune system and making them more susceptible to disease outbreaks ...
Maria Carolina Ribeiro   +5 more
wiley   +1 more source

Observations on the developmental stages of the smooth dogfish, Eridacnis radcliffei Smith from Gulf of Mannar. [PDF]

open access: yes, 1974
The structure of mature reproductive organs of fifteien adult females of Eridacn'.s radcliffei. ranging in total length from 150 to 218 mm collected from the trawl catches off Mandapam in Gulf of Mannar during February, 1972 at a depth ranging frori ...
Appukuttan, K K, Nair, R V
core  

Shell Constraints on Evolutionary Body Size–Limb Size Allometry Can Explain Morphological Conservatism in the Turtle Body Plan

open access: yesEcology and Evolution, Volume 14, Issue 11, November 2024.
Turtle body size and limb size scale nearly isometrically along the group's evolution, although major deviations are only seen in highly specialized ecological or morphological groups. The evolution of the shell constrained turtle body proportions, as they show lower rates of variance accumulation in these allometries than other more diverse and ...
Guilherme Hermanson, Serjoscha W. Evers
wiley   +1 more source

The Role of Progesterone in the Reproductive Physiology of Females of Viviparous Squamata

open access: yesReceptors
Progesterone (P4) regulates diverse reproductive processes across vertebrates through nuclear receptors; however, its mechanisms in squamate reptiles—particularly in viviparous species—remain poorly understood.
Norma Berenice Cruz-Cano   +4 more
doaj   +1 more source

Evidence for cell turnover as the mechanism responsible for the transport of embryos towards the vagina in viviparous onychophorans (velvet worms)

open access: yesFrontiers in Zoology, 2019
Background Onychophorans, commonly known as velvet worms, display a remarkable diversity of reproductive strategies including oviparity, and placentotrophic, lecithotrophic, matrotrophic or combined lecithotrophic/matrotrophic viviparity.
Sandra Treffkorn   +2 more
doaj   +1 more source

Shedding light on the ‘dark side’ of phylogenetic comparative methods [PDF]

open access: yes, 2016
ORCID: 0000-0003-4919-8655© 2016 The Authors. Methods in Ecology and Evolution published by John Wiley & Sons Ltd on behalf of British Ecological Society This is an open access article under the terms of the Creative Commons Attribution License, which
Beaulieu   +64 more
core   +2 more sources

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