This now appears to be an important contributor to the cataclysmic decline of that commercially important fishery. Several factors, including contamination, appears to be contributing to this phenomenon. The importance of different factors appears to vary from one place to another. The causes now appear to be a mixture of chemicals, including excreted byproducts of birth control pills and industrial chemicals. But most of the animal kingdom is invertebrate.
New studies reveal invertebrate species' vulnerability to endocrine disruption.