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... A study was performed to evaluate the efficacy of shrimp shell meal derived natural astaxanthin (SSM), supplemented with its commercial variant on gonadal maturation and vitellogenin gene (Vtg.) expression in reproductively active adults of the high-value ornamental cichlid discus (Symphysodon aequifasciatus) reared under captivity. Four isonitrogenous (50% crude protein), isolipidic (9% ether ext ...
vitellogenin, etc ; case studies; egg production; fecundity; lobsters; population dynamics; Show all 6 Subjects
Abstract:
... In 1990s, the European spiny lobster Palinurus elephas, one of the most commercially important species in the Mediterranean, exhibited a population decline. For this reason, fully protected areas (FPAs) appeared effective in re-establishing natural populations and supporting fishery-management objectives. Here, the reproductive parameters of P. elephas populations in two different FPAs (Su Pallosu ...
vitellogenin, etc ; Zeugodacus cucurbitae; fruits; gene expression; genes; insect biochemistry; oviposition; pests; vegetables; Show all 9 Subjects
Abstract:
... Zeugodacus cucurbitae (Coquillett) is an important pest of fruit and vegetable crops in tropical and subtropical regions. Previous studies have shown that short‐term high‐temperature stress has a significant effect on the oviposition behavior of three successive generations (F₁–F₃) of Z. cucurbitae (Coquillett). For the clarification of the molecular response of the oviposition behavior of Z. cucu ...
vitellogenin, etc ; Clarias batrachus; actinomycin D; appetite; carp; catfish; conspecificity; cycloheximide; oocytes; theophylline; trypsin; Show all 11 Subjects
Abstract:
... Present study demonstrates that conspecific vitellogenin1 (CFVg1) induces oocyte maturation in the catfish, Clarias batrachus. CFVg1 is able to develop fertilizable eggs in the Clarias batrachus. Therefore, different in vitro oocyte culture experiments were designed to see whether CFVg1 has efficacy of oocyte maturation and its pathway. In in vitro oocyte culture experiment, CFVg1 showed a dose- a ...
vitellogenin, etc ; Phytoseiulus persimilis; acarology; eggs; embryogenesis; genes; immatures; lipid transfer proteins; males; oocytes; oogenesis; Show all 11 Subjects
Abstract:
... Vitellogenin (Vg) is an important factor that impacts oocyte maturation, egg formation and embryonic development in Arthropoda. Two orthologs of Vg gene were obtained from the genome of Phytoseiulus persimilis and termed as PpVg1 and PpVg2. Both orthologs belong to the large lipid transfer protein superfamily. The expression of PpVg1 and PpVg2 was low in immatures and male adults, and increased ra ...
vitellogenin, etc ; Pardosa; insects; juveniles; ligands; low density lipoprotein; oocytes; oviposition; spiders; transcription (genetics); vitellogenesis; Show all 11 Subjects
Abstract:
... Vitellogenin receptor (VgR) is crucial for vitellogenin (Vg) uptake by oocytes. VgR is less known in Arachnida, especially in spiders. Different from only one VgR in an arthropod species, two VgRs, VgR‐1 and VgR‐2, were found in the pond wolf spider, Pardosa pseudoannulata. Both VgRs had the typical domains of the low‐density lipoprotein receptor family except for the absence of the ligand‐binding ...
... In insects, insulin signaling plays a pivotal role in the regulation of growth, metabolism, reproduction, and aging. Revealing the regulatory roles of insulin signaling in natural enemy insects is helpful for developing artificial approaches to promote reproduction. In this study, the expression of four insulin-like peptides (ILPs) in female adults of the natural predator Chrysopa pallens was anal ...
vitellogenin, etc ; Fenneropenaeus merguiensis; RNA interference; bone morphogenetic proteins; females; hepatopancreas; ovarian development; shrimp; transcriptome; vitellogenesis; Show all 10 Subjects
Abstract:
... Receptors, which play an initial role in signaling pathways in several physiological processes, including reproduction, are among the several molecular factors that control ovarian development in organisms. This study aimed to identify and study receptors potentially involved in controlling the reproductive process of female banana shrimp, Fenneropenaeus merguiensis. Ovarian transcriptomes derived ...
... Pesticide resistance and resurgence are serious problems often occurring simultaneously in the field. In our long‐term study of a fenpropathrin‐resistant strain of Tetranychus cinnabaribus, enhancement of detoxification and modified fecundity mechanisms were both observed. Here we investigate the network across these two mechanisms and find a key node between resistance and resurgence. We show tha ...
... The aging process leads to the gradual impairment of physiological functions in the elderly, making them more susceptible to the toxicity of environmental pollutants. In this study, aged zebrafish were first transplanted with the feces from young donors and subsequently exposed to perfluorobutanesulfonate (PFBS), an emerging persistent toxic pollutant. The interaction between young fecal transplan ...
... 17β-Estradiol (E2) and 17α-methyltestosterone (MT) are steroid hormones with dramatic regulatory effects on the growth performance and gonadal development of aquatic species. The aim of the present study was to investigate the regulatory effects of E2 and MT on the growth performance and gonadal development of juvenile prawns (Macrobrachium nipponense). Male and female juvenile prawns were separat ...
... Microplastics (MPs) are considered to exacerbate the impacts of hydrophobic organic pollutants on aquatic organisms through the carrier function, but whether MPs affect the transgenerational toxicity of pollutants is unclear. This study exposed adult female marine medaka to phenanthrene (Phe)-adsorbed MPs for 60 days to investigate the effects of MPs on the bioaccumulation, reproductive and transg ...
vitellogenin, etc ; Daphnia magna; gene expression; genes; heat stress; hemoglobin; lipid metabolism; oxidative stress; prochloraz; protein synthesis; toxic substances; Show all 11 Subjects
Abstract:
... In the present study, Daphnia magna individuals were exposed for 21 days to 87, 130, 170, 230 and 380 μg/L of prochloraz. The expression of genes related to lipid metabolism (fabd), oxidative stress (cat and gst), heat shock proteins synthesis (hsp70 and hsp90), haemoglobin synthesis (hgb1 and hgb2), metallothioneins synthesis (mt-a, mt-b and mt-c), and vitellogenin synthesis (vgt1 y vgt2) were an ...
... Initiation of vitellogenesis by blood feeding is essential for egg maturation in ticks. Nutrients derived from the blood meal are utilized by female ticks to synthesize the yolk protein precursor vitellogenin (Vg). Engorged Ornithodoros moubata ticks can synthesize Vg whether mated or virgin, thus O. moubata is an excellent model for studying the relative roles of blood feeding and mating in tick ...
vitellogenin, etc ; adipokinetic hormone; autumn; bee venoms; carbohydrates; central nervous system; energy metabolism; hemolymph; honey; lipids; melittin; midgut; winter; Show all 13 Subjects
Abstract:
... Worker honey bees are subject to biochemical and physiological changes throughout the year. This study aimed to provide the reasons behind these fluctuations. The markers analysed included lipid, carbohydrate, and protein levels in the haemolymph; the activity of digestive enzymes in the midgut; the levels of adipokinetic hormone (AKH) in the bee central nervous system; the levels of vitellogenins ...
... Difenoconazole (DCZ) is a triazole fungicide that negatively affects aquatic organisms and humans. However, data regarding the reproductive toxicity of DCZ are insufficient. In this study, we used zebrafish (from 2 h post-fertilization [hpf] to adulthood) as a model to evaluate whether DCZ at environmentally relevant concentrations (0.1, 1.0, and 10.0 μg/L) induces reproductive toxicity. After exp ...
... As a frequently detected organophosphate ester in various environmental media, the toxic effects of 2-ethylhexyl diphenyl phosphate (EHDPHP) on aquatic organisms of different sexes remain unclear. In this study, adult zebrafish were exposed to 2.5, 50, 250 µg/L of EHDPHP for 21 days to investigate its sex-dependent reproductive toxicity and related mechanisms. EHDPHP exposure significantly inhibit ...
vitellogenin, etc ; bile acids; bisphenol A; cell lines; chickens; cytotoxicity; estradiol; gene expression; hepatocytes; lethal concentration 50; lipids; pollution; research; Show all 13 Subjects
Abstract:
... Previously, we showed that the chicken LMH cell line cultured as 3D spheroids may be a suitable animal free alternative to primary chicken embryonic hepatocytes (CEH) for avian in vitro chemical screening. In this study, cytotoxicity and mRNA expression were determined in LMH 3D spheroids following exposure to bisphenol A (BPA), five BPA replacement compounds (BPF, TGSH, DD-70, BPAF, BPSIP), and 1 ...
vitellogenin, etc ; Aphis gossypii; epoxide hydrolase; fecundity; flonicamid; gene expression regulation; insect pests; juvenile hormones; life tables; plant protection; population growth; Show all 11 Subjects
Abstract:
... Flonicamid (N-cyanomethyl-4-trifluoromethylnicotinamide) is a novel systemic insecticide that shows high insecticidal toxicity against sap-sucking pests. However, little is known about the sublethal effects of flonicamid on melon aphid, Aphis gossypii Glover, a serious insect pest of many vegetables. Herein, the toxicity of flonicamid to A. gossypii was determined using the leaf-dipping method, an ...
vitellogenin, etc ; Micropterus dolomieu; agricultural land; biosynthesis; drainage; females; fish; histopathology; land cover; liver; males; oocytes; streams; testes; Lake Erie; Pennsylvania; Show all 16 Subjects
Abstract:
... Smallmouth bass Micropterus dolomieu were sampled from three sites within the Lake Erie drainage (Elk Creek, Twentymile Creek, and Misery Bay, an embayment in Presque Isle Bay). Plasma, tissues for histopathological analyses, and liver and testes preserved in RNALater® were sampled from 30 smallmouth bass (of both sexes) at each site. Liver and testes samples were analyzed for transcript abundance ...