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Estefany L García-Cruz et al.
Comparative biochemistry and physiology. Part A, Molecular & integrative physiology, 245, 110701-110701 (2020-04-17)
The pejerrey is an atherinopsid species from South America that presents a combination of genotypic and environmental (temperature-dependent) sex determination whereby low and high temperatures induce feminization and masculinization, respectively. Masculinization involves a heat-induced stress response leading to increased circulating
Shogo Higaki et al.
Scientific reports, 7, 42852-42852 (2017-02-18)
Many endemic fish species are threatened with extinction. Conservation strategies and the restoration of endemic fish after extinction must therefore be investigated. Although sperm cryopreservation is indispensable for the conservation of endangered fishes, the limited number of mature fish and
Omer Sid-Ahmed et al.
Environmental toxicology and chemistry, 32(6), 1332-1336 (2013-02-14)
11-Oxoetiocholanolone and related substances are important metabolites of cortisol and are excreted via feces in ruminants. To investigate whether 11-ketotestosterone (11-KT) or its immunoreactive metabolites are formed and excreted in ruminant feces, an enzyme immunoassay (EIA) was developed and validated.
J L Saraiva et al.
Fish physiology and biochemistry, 39(1), 85-89 (2012-05-31)
The inter-populational variation in the reproductive behaviour of the peacock blenny Salaria pavo (Risso 1810), particularly the influence of the ecologic environment, was reviewed in the present work. Two populations of this species inhabiting contrasting environments were studied: the Ria
Chien-Ju Lin et al.
Developmental neurobiology, 76(2), 121-136 (2015-05-20)
The early brain development, at the time of gonadal differentiation was investigated using a protandrous teleost, black porgy. This natural model of monosex juvenile fish avoids the potential complexity of sexual dimorphism. Brain neurogenesis was evaluated by histological analyses of
Andrew D Southam et al.
Environmental science & technology, 45(8), 3759-3767 (2011-03-18)
The ability of targeted and nontargeted metabolomics to discover chronic ecotoxicological effects is largely unexplored. Fenitrothion, an organophosphate pesticide, is categorized as a "red list" pollutant, being particularly hazardous to aquatic life. It acts primarily as a cholinesterase inhibitor, but
Ana S Félix et al.
G3 (Bethesda, Md.), 10(6), 1971-1982 (2020-04-12)
It has been hypothesized that androgens respond to the social interactions as a way to adjust the behavior of individuals to the challenges of the social environment in an adaptive manner. Therefore, it is expected that transient changes in circulating
Azadeh Hatef et al.
Aquatic toxicology (Amsterdam, Netherlands), 122-123, 181-187 (2012-07-24)
In mammals, vinclozolin (VZ) is known as anti-androgen, which causes male infertility via androgen receptor (AR) antagonism. In aquatic animals, the VZ effects on reproductive functions are largely unknown and results are somewhat contradictory. To understand VZ adverse effects on
Qing Wang et al.
Chemosphere, 221, 235-245 (2019-01-15)
Bisphenol A (BPA) is an abundant endocrine-disrupting compound that is found in the aquatic environment and has adverse effects on fish reproduction; however, the exact pathway of these impacts is unclear. In this study, the different effects of BPA on
Li-Na Sun et al.
Endocrinology, 155(4), 1476-1488 (2014-01-21)
Females with differentiated ovary of a gonochoristic fish, Nile tilapia, were masculinized by long-term treatment with an aromatase inhibitor (Fadrozole) in the present study. The reversed gonads developed into functional testes with fertile sperm. The longer the fish experienced sex
A G Little et al.
The Journal of experimental biology, 223(Pt 14) (2020-06-21)
Female-biased mortality has been repeatedly reported in Pacific salmon during their upriver migration in both field studies and laboratory holding experiments, especially in the presence of multiple environmental stressors, including thermal stress. Here, we used coho salmon (Oncorhynchus kisutch) to
Yohana M Velasco-Santamaría et al.
Environmental pollution (Barking, Essex : 1987), 178, 189-196 (2013-04-16)
The interaction of xenobiotics is common in aquatic ecosystems; therefore, we wanted to evaluate if trenbolone (TB) modulates the effects of 17α-ethinylestradiol (EE2). Male eelpout (Zoarces viviparus) were exposed to 5 ng L(-1) EE2 continuously for 19 d (EE2-C) or discontinuously (11 d, EE2-D)
Karolína Rohlenová et al.
Parasites & vectors, 4, 120-120 (2011-06-29)
The basic function of the immune system is to protect an organism against infection in order to minimize the fitness costs of being infected. According to life-history theory, energy resources are in a trade-off between the costly demands of immunity
Amy L Filby et al.
Environmental science & technology, 46(6), 3472-3479 (2012-03-01)
Environmental estrogens have been shown to affect aspects of fish behavior that could potentially impact on wild populations, but the physiological mechanisms underpinning these effects are unknown. Using small colonies of zebrafish (Danio rerio), we evaluated the impacts of estrogen
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Adriana E Sardi et al.
General and comparative endocrinology, 221, 144-155 (2015-01-27)
Steroidogenesis, the process by which steroid hormones are synthesized, involves a vast number of enzymes and biochemical pathways that are susceptible to chemical modulation. Endocrine disrupting compounds (EDCs) are of special concern since they can alter hormone homeostasis by interfering
I Ben Ammar et al.
Fish physiology and biochemistry, 44(1), 301-310 (2017-11-06)
For most temperate and arctic fish species, photoperiod is the key abiotic factor determining the onset of the reproductive cycle, and, for many species, constant long photoperiod seems to have an inhibitory effect. Yet, there is no knowledge about the
Imen Ben Ammar et al.
Fish physiology and biochemistry, 46(1), 89-102 (2019-09-06)
Photoperiod and temperature are commonly accepted as the determinant factors for the control of the reproductive cycle in freshwater fishes. However, this determining effect is dependent on fish species. While applying a constant long photoperiod has an inhibitory effect in
Brett R Blackwell et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 1163, 122513-122513 (2021-01-14)
Exposure to endocrine-disrupting compounds (EDCs) can alter steroid hormone production in vertebrates, sometimes leading to adverse reproductive or developmental effects. Liquid chromatography mass spectrometry methods are the gold standard for analyte confirmation and quantification in biological matrices, but radioimmunoassays (RIAs)
Sayyed Mohammad Hadi Alavi et al.
Fish physiology and biochemistry, 38(6), 1655-1666 (2012-06-06)
Spermiation and changes in androgen (testosterone, T and 11-ketotestosterone, 11-KT) levels were studied in sterlet (Acipenser ruthenus) treated with GnRH agonist implants (DAla(6)-Pro(9)-LHRHa) at 25 and 75 μg kg(-1) b.w. and compared with those males treated with 4 mg kg(-1)
Shogo Higaki et al.
Zygote (Cambridge, England), 25(5), 652-661 (2017-08-25)
Sperm cryopreservation is a valuable conservation method for endangered fish species. Here we report an easy and efficient cryopreservation method for juvenile whole testis by vitrification and successful sperm production from the vitrified whole testis via in vitro spermatogenesis in
Maria C Escalante-Rojas et al.
Ecotoxicology and environmental safety, 208, 111502-111502 (2020-10-30)
The reproductive physiology of fish can be changed by the presence of pollutants in the water, which act as endocrine disrupting compounds (EDC). We evaluated the impacts of water contaminants in polluted reservoirs acting as possible EDC on the reproductive
Harpreet Bhatia et al.
Journal of applied toxicology : JAT, 35(7), 806-816 (2014-10-29)
The aim of the present study was to evaluate whether long-term exposures to environmentally relevant concentrations of di-n-butyl phthalate (DnBP) disrupt the reproduction-based endpoints in juvenile Murray rainbowfish (Melanotaenia fluviatilis). Fish were exposed to 5, 15 or 50 µg l(-1) DnBP for
Jia Zheng et al.
The lancet. Diabetes & endocrinology, 8(8), 693-702 (2020-07-25)
Although clinicians often measure the serum concentration of androgens in premenopausal women presenting with sexual dysfunction, with some women given testosterone or dehydroepiandrosterone as treatment if their concentrations are low, whether androgens are determinants of sexual function in women of
Julie M Butler et al.
Hormones and behavior, 114, 104539-104539 (2019-06-15)
Visual communication is used widely across the animal kingdom to convey crucial information about an animals' identity, reproductive status, and sex. Although it is well-demonstrated that auditory and olfactory sensitivity can change with reproductive state, fewer studies have tested for
Richard J Kavanagh et al.
Aquatic toxicology (Amsterdam, Netherlands), 130-131, 201-209 (2013-02-19)
Previous laboratory based studies have shown that oil sands process-affected waters (OSPWs) containing high concentrations of naphthenic acids (>25 mg/l) have adverse effects on the reproductive physiology of fish. The purpose of this study was to assess the reproductive development
Viet D Dang
Journal of chromatographic science, 59(1), 7-14 (2020-10-21)
Sex steroid hormones are potential biomarkers of reproductive function in teleost fish, but their measurement continues to rely on antibody-based assays. The objective of this study was to optimize a robust and simultaneous liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for
Rachel M Genova et al.
Hormones and behavior, 62(4), 426-432 (2012-08-14)
Behavioral and neuroendocrine mechanisms of social vocalization in teleost fish are influenced by the glucocorticoid cortisol and the androgen 11-ketotestosterone (11kT). The relative abundance of both 11kT, which binds to androgen receptors (ARα, ARβ), and cortisol, which binds to glucocorticoid
Teresa Fagundes et al.
Physiology & behavior, 107(3), 283-291 (2012-08-15)
Phenotypic change in response to variation in environmental cues has been widely documented in fish. Transitions in social dominance, in particular, have been shown to induce a rapid switch in reproductive phenotypes in many species. However, this effect has been
Géraldine Fazio et al.
The Journal of parasitology, 98(4), 695-705 (2012-03-13)
The introduced parasite Anguillicoloides crassus is thought to play an important role in the decline of freshwater eel (Anguilla spp.) populations. These nematodes are known to negatively affect many fitness-related traits in eels. We used experimental infections to study the
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