Chemical fish sex
'Toxic stew' of chemicals causing male fish to carry eggs in testes
Fish are the sex-switching masters of the animal kingdom
3 Jul Tougher controls should be considered on chemicals that can feminise male fish and cause other “sub-lethal” effects, a leading ecotoxicologist.
20 Feb While most people understand the dangers of flushing toxic chemicals into the ecosystem through municipal sewer systems, one potentially.
Description:In contrast, fish show a wide variety of sex determination systems, some via sex determining chromosomes, others via autosomal genes and still others via environmental or social signals [ 4 , 5 , 6 ]. In both these cases, the different sexes are always represented by two different individuals e. Underwater optics and lighting are limiting, chemical signals can diffuse quickly and other modalities such as weak electrical signaling and sound have distance limitations. However, most sex changing fish rely on social cues to initiate and orchestrate the development of the dominant phenotype [ 61 ], which requires correlated changes in a suite of characters including brain, behavior, hormones, gonads, genitalia and other secondary sexual characters [ 62 ].
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