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The herbicide atrazine, one of the world's most widely used pesticides, screws up the sex lives of adult male frogs, emasculating three-quarters of them and turning one in 10 into females, according to a new study by UC Berkeley's Tyrone Hayes.
One of the mostly widely used weed killers, atrazine, may be disrupting male frogs' sexual development--even reversing it. The bountiful fields of the U.S. are awash in atrazine. Some 36 million...
In the present study, we examined the long-term effects of atrazine exposure on reproductive development and function in an all-male population of African clawed frogs (Xenopus laevis), generated by crossing ZZ females (sex-reversed genetic males) to ZZ males (SI Materials and Methods). The advantage of using this population is that 100% of the ...
Atrazine is a potent endocrine disruptor that both chemically castrates and feminizes male amphibians. It depletes androgens in adult frogs and reduces androgen-dependent growth of the larynx in developing male larvae. It also disrupts normal gonadal development and feminizes the gonads of developing males.
Atrazine is also a potent endocrine disruptor that is active at low, ecologically relevant concentrations. Previous studies showed that atrazine adversely affects amphibian larval development. The present study demonstrates the reproductive consequences of atrazine exposure in adult amphibians.
We examined the effects of atrazine on sexual development in African clawed frogs (Xenopus laevis). Larvae were exposed to atrazine (0.01–200 ppb) by immersion throughout larval development, and we examined gonadal histology and laryngeal size at metamorphosis.
The Ecorisk panel also examined the effects of atrazine in green frogs (Rana clamitans) in the laboratory, for comparison with my laboratory's work on R. pipiens. Their study concluded that atrazine showed no effects on mortality, metamorphosis, or sex differentiation, again reportedly refuting our findings in R. pipiens .
This reduction in feeding success can lead to malnutrition, weakening the frogs and making them less resilient to other environmental stressors. Explore how atrazine impacts frog hormones, reproduction, development, and behavior, revealing significant ecological consequences.
Here we investigate the effects of exposure to water-borne atrazine contamination on wild leopard frogs (Rana pipiens) in different regions of the United States and find that 10–92% of males...
A barrage of studies on such endocrine disruption has followed—some confirming that amphibians such as frogs are suffering from an atrazine onslaught, others finding no effect and others even...