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This issue of Green Theory and Praxis came about as a response to conversations regarding whether ecofeminism had adequately engaged with queer theory and also the converse, whether queer theory has engaged ecofeminism. At times these two bodies of knowledge have heavily influenced one another but the potential of combining both fields has sadly often been overlooked. This issue seeks to bridge this divide. However, after receiving a variety of submissions we realized that for this edition to achieve our goal that it had to move away from just a queering of ecofeminism. Instead we realized that it needed to address the environmental justice and animal liberation movements more sweepingly.
Constantin-Emil Ursu, Adrian Poruciuc, Cornelia-Magda Lazarovici (eds.), From Symbols to Signs, Editura Karl A. Romstorfer, Suceava, 2015: 133-200.
Lunar Menstrual Chronograms from the Danube Civilization to procreate a Child of the MoonHormones and Behavior
Nocturnal Activity in the Green Sea Turtle Alters Daily Profiles of Melatonin and Corticosterone2002 •
2018 •
One of the many functions of melatonin in vertebrates is seasonal reproductive timing. Longer nights in winter correspond to an extended duration of melatonin secretion. The purpose of this review is to discuss melatonin synthesis, receptor subtypes, and function in the context of seasonality across vertebrates. We conclude with Tinbergen's Four Questions to create a comparative framework for future melatonin research in the context of seasonal reproduction.
Light at night (LAN), sometimes known as light pollution by astronomers, is a little understood environmental problem that has deteriorated over the past forty or fifty years. It is now increasingly obvious that it is having serious ecological and sociological consequences. What isn't generally known is that it also has health implications of which medical practitioners should now be aware. The causes of the problem are explained and a variety of simple solutions are offered.
Evidence suggests that chemicals acting as endocrine disruptors can modulate amphibian sex differentiation and induce sex reversal and gonadal abnormalities. However, consequences of gonadal abnormalities such as testicular oocytes on amphibian reproductive potential remain unclear. Assessing this linkage requires suitable experimental models, such as partial life-cycle exposure, in order to correlate accessible endpoints with apical endpoints indicative of reproductive fitness. Larvae of the emerging amphibian model Silurana tropicalis were exposed to EE2 in the ng/L range from NF stage 51-52 until completion of metamorphosis, and endpoints related to the reproductive function were assessed on completion of metamorphosis and at sexual maturity. Exposure to EE2 skewed the sex ratio toward phenotypic females in the treated groups, but also affected growth and development of the tadpoles. At sexual maturity, absence of one or both oviducts was observed in some female frogs that had been exposed to EE2. Regressed testicular oocytes were observed in most males, including males from the control group. The occurrence of regressed testicular oocytes seems to be dependent on genetic background, rather than xenoestrogens exposure. Mature testicular oocytes and presence of oviduct-like ducts in frogs displaying testis were only seen in treatment groups exposed to EE2. The incidence and the severity of gonadal abnormalities observed in Silurana tropicalis males and females exposed to EE2 were dependent on the nominal dose but also dependent on parentage. No link could be made between gonadal abnormalities and the reproductive potential of the frogs. These findings suggest that further development of partial life cycle models using Silurana tropicalis may be warranted in order to support identification and characterization of endocrine disrupters in chemical safety testing, for risk assessment and registration.
Journal of Pineal Research
Comparative aspects of the pineal/melatonin system of poikilothermic vertebrates1996 •
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Journal of Experimental Zoology Part A Ecological Genetics and Physiology
Role of melatonin in fish osmoregulation: Towards a new action of the hormoneInternational journal of occupational and environmental health
State of the evidence: the connection between breast cancer and the environmentAmerican Zoologist
The role of the pineal body in ectotherm thermoregulation1979 •
International Journal of Molecular Sciences
Protecting the Melatonin Rhythm through Circadian Healthy Light Exposure2014 •
International Journal of Andrology
Reproductive dysgenesis in wildlife: a comparative view2006 •
Journal of Biological Rhythms
Melatonin Administration Methods for Research in Mammals and Birds2018 •
International Journal of Environmental Research and Public Health
Effect of Endocrine Disruptor Pesticides: A Review2011 •
2015 •
Environmental Pollution
Amphibians and agricultural chemicals: Review of the risks in a complex environment2009 •
Comparative Biochemistry and Physiology Part C: Pharmacology, Toxicology and Endocrinology
Daily changes in thyroid activity in the frog Rana perezi: Variation with season1996 •
2005 •
Endocrine Reviews
The Effects of Light at Night on Circadian Clocks and Metabolism2014 •
General and Comparative Endocrinology
Effects of the environmental estrogenic contaminants bisphenol A and 17α-ethinyl estradiol on sexual development and adult behaviors in aquatic wildlife species2014 •
Philosophical transactions of the Royal Society of London. Series B, Biological sciences
Melatonin: a possible link between the presence of artificial light at night and reductions in biological fitness2015 •
Sexual Development
Disorders of Sexual Development in Wild and Captive Exotic Animals2012 •
2012 •
Reviews in Fish Biology and Fisheries
A review of the multifunctional hormone melatonin and a new hypothesis involving osmoregulation2001 •
F1000 Medicine Reports
Illuminating the deleterious effects of light at night2011 •
Acta Neurobiologiae Experimentalis
Pineal photosensitivity. A comparison with retinal photoreception1994 •
International Journal of Advanced Academic Research
Impacts of Plastic Pollution on the Sustainability of Seafood Value Chain and Human Health2019 •
Journal of Pineal Research
Influence of light-dark and lunar cycles on the ocular melatonin rhythms in the seagrass rabbitfish, a lunar-synchronized spawner2004 •
Critical reviews in toxicology
Effects of atrazine in fish, amphibians, and reptiles: an analysis based on quantitative weight of evidence2014 •
Environmental Research
Contaminant-induced feminization and demasculinization of nonmammalian vertebrate males in aquatic environments2006 •
Frontiers in Nutrition
Does Circadian Disruption Play a Role in the Metabolic–Hormonal Link to Delayed Lactogenesis II?2015 •