Results 11 to 20 of about 13,138 (208)

Reproductive Biology, Sperm storage, and Sexual Maturity of Thamnodynastes strigatus (Serpentes: Dipsadidae) [PDF]

open access: yesAnais da Academia Brasileira de Ciências, 2022
Life history strategies determine and influence many aspects of species fitness. In this study, we describe the reproductive biology - reproductive cycle, sperm storage, and sexual maturity - of Thamnodynastes strigatus in South Brazil.
LUIZA LOEBENS   +3 more
doaj   +1 more source

Global Warming Drives Phenological Shifts and Hinders Reproductive Success in a Temperate Octocoral. [PDF]

open access: yesGlob Chang Biol
Climate change is advancing spring warming, yet its effects on marine foundation species remain unclear. We combined field observations and ex‐situ experiments to examine how advanced warming affects reproduction in the Mediterranean octocoral Paramuricea clavata.
Viladrich N   +8 more
europepmc   +2 more sources

DDX6 Is Essential for Oocyte Development and Maturation in Locusta migratoria

open access: yesInsects, 2021
DEAD-box protein 6 (DDX6) is a member of the DDX RNA helicase family that exists in all eukaryotes. It has been extensively studied in yeast and mammals and has been shown to be involved in messenger ribonucleoprotein assembly, mRNA storage, and decay ...
Junxiu Wang   +5 more
doaj   +1 more source

Comparison of ovarian cycles of Hungarian riverine fish species representing different spawning strategies [PDF]

open access: yes, 2008
Investigations on the ovarian cycle of fish species that inhabit Hungarian rivers are necessitated by both environmental and economic reasons. The objective of our research was to explore new fundamental knowledge concerning the ovarian cycle of the ...
Baska, Ferenc   +6 more
core   +1 more source

Ovary Proteome Analysis Reveals RH36 Regulates Reproduction via Vitellin Uptake Mediated by HSP70 Protein in Hard Ticks

open access: yesFrontiers in Cellular and Infection Microbiology, 2020
Ticks are blood-sucking vector arthropods, which play an important role in transmitting pathogens between humans and animals. RH36 is an immunomodulatory protein expressed in the salivary glands, but not other organs, of partially fed Rhipicephalus ...
Fangfang Wang   +8 more
doaj   +1 more source

Four-way regulation of mosquito yolk protein precursor genes by juvenile hormone-, ecdysone-, nutrient-, and insulin-like peptide signaling pathways. [PDF]

open access: yes, 2014
Anautogenous mosquito females require a meal of vertebrate blood in order to initiate the production of yolk protein precursors by the fat body. Yolk protein precursor gene expression is tightly repressed in a state-of-arrest before blood meal-related ...
Attardo, Geoffrey M   +3 more
core   +2 more sources

Gonadal proliferation and reproductive cycle of the exotic sea squirt Cnemidocarpa amphora () (Pleurogona, Styelidae) sampled for the first time from the northern coast of Arabian Gulf in Saudi Arabia [PDF]

open access: yesBrazilian Journal of Biology, 2023
Specimens of Cnemidocarpa amphora were collected monthly from the Arabian Gulf from September 2017 to August 2018. Parts of their gonads were prepared for histological testing. The gonads’ diameters varied by month.
N. A. AlQurashi, G. Ibrahim
doaj   +1 more source

Zygoparity and sex steroid hormone profiles in bluemouth Helicolenus dactylopterus [PDF]

open access: yes, 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   +30 more
core   +1 more source

SEASONAL INCIDENCE OF CAPTURE AND REPRODUCTION OF FIVE FOSSORIAL SNAKE SPECIES IN WEST VIRGINIA [PDF]

open access: yes, 2017
Museum specimens of five species of fossorial snakes collected in West Virginia during 1930–2000 were examined to determine monthly incidence of capture, adult body sizes, reproductive cycle, and clutch characteristics.
Herrick, Kelli-Marie   +3 more
core   +2 more sources

Revealing genes associated with vitellogenesis in the liver of the zebrafish (Danio rerio) by transcriptome profiling

open access: yesBMC Genomics, 2009
Background In oviparous vertebrates, including fish, vitellogenesis consists of highly regulated pathways involving 17β-estradiol (E2). Previous studies focused on a relatively small number of hepatic expressed genes during vitellogenesis.
Hyslop Terry   +7 more
doaj   +1 more source

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