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Food web architecture and trophic interactions between organisms can be studied using ratios of naturally occurring stable isotopes of carbon (C/C) and nitrogen (N/N). Most studies, however, focused on free-living organisms, but recently, there has been growing interest in understanding trophic interactions of parasites. The crustacean ectoparasite is a well-studied parasite of freshwater teleost fish, which has low host specificity and a cosmopolitan distribution.
View Article and Find Full Text PDFThe Placenta as the Main Source of Serotonin in Ontogenetic Dynamics: Inflammation-Induced Modulation of Placental Serotonin Can Be Prevented by Immunoglobulin Administration.
Int J Mol Sci
December 2024
Laboratory of Comparative Developmental Physiology, Koltzov Institute of Developmental Biology of the Russian Academy of Sciences, Moscow 119334, Russia.
Placental serotonin is recognized as a key component of feto-placental physiology and can be influenced by environmental factors such as maternal diet, drugs, stress, and immune activation. In this study, we compared the contribution of placental and fetal sources to the maintenance of serotonin levels required for normal fetal development during ontogenetic dynamics. Our results demonstrated the leading role of the placenta at almost all stages of development.
View Article and Find Full Text PDFAge Is Just a Number: Ontogenetic Conservation in Activation of Blood Clotting Factors VII, X, and XII by Caucasus Blunt-Nosed Viper () Venoms.
Toxins (Basel)
December 2024
Adaptive Biotoxicology Lab, School of the Environment, University of Queensland, St Lucia, QLD 4072, Australia.
This study examined the pathophysiological effects of venoms from neonate and adult specimens of the viperid snake , focusing on their ability to activate various blood clotting factors in human plasma. All venoms exhibited strong procoagulant properties. In concentration-response tests, the clotting potency of the neonate venoms fell within the range of their parents' maximum clotting velocities and areas under the curve.
View Article and Find Full Text PDFTolerance to insect herbivory increases with progressing plant development.
Plant Biol (Stuttg)
December 2024
Laboratory of Entomology, Plant Sciences, Wageningen University and Research, Wageningen, The Netherlands.
Plants can sustain various degrees of damage or compensate for tissue loss by regrowth without significant fitness costs. This tolerance to insect herbivory depends on the plant's developmental stage during which the damage is inflicted and on how much tissue is removed. Plant fitness correlates, that is, biomass and germination of seeds, were determined at different ontogenetic stages, vegetative, budding, or flowering stages of three annual brassicaceous species exposed to feeding by Pieris brassicae caterpillars at different intensities.
View Article and Find Full Text PDFThe osteohistology of gorgonopsian therapsids and implications for Permo-Triassic theriodont growth.
J Anat
December 2024
Evolutionary Studies Institute, University of the Witwatersrand, Johannesburg, South Africa.
During the Late Permian, saber-toothed gorgonopsian therapsids were the dominant terrestrial predators, playing crucial roles as apex predators alongside therocephalian therapsids within Permian terrestrial ecosystems. The entire gorgonopsian clade went extinct during the Permo-Triassic mass extinction, leaving other therapsids to continue into the Triassic. Gorgonopsians have not been well studied, particularly in terms of their growth patterns, with only a few genera having undergone osteohistological analysis.
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