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The Feminization of Male Fish

Alana Scauzillo

Updated Nov. 2, 2014

Transcript

The Feminization of Male Fish

Supply & Demand

- high demand in North America

- 7.5 billion in U.S.

- 29 million pounds= consumption in Canada

- Walmart:

NPE removal
top three harmful chemicals

NPEs in Alberta

NPEs and NPs

Taking action is so crucial to accomplishing environmental safety.

Little advancements in waste water treatment plants (WWTPs) = longer-term affects may be more problematic, violent and damaging

nonylphenol ethoxylates and nonylphenols
wide spread in large volumes
persistent, bioaccumulative and toxic
long-chain and short-chain (NPs) compounds
short-chain more dangerous
hydrophilic and hydrophobic
C6 and C12 (hexyl and dodecyl) alkylphenol ethoxylates

- struggle to fully break-down

-NPE concentrations in multiple treatment plant effluents

- fewer ethoxylates (NP2EO)= more persistent

- exposure affects wildlife and humans:

feminization of male fish
masculinization of females
abnormal reproductive organs
altered sexual behaviour

- longer-term effects= unknown

Prevention:

avoid pesticides
avoid fatty foods
avoid heating in plastic containers
support government regulation

Environmental Estrogen's

Questions?

endocrine disruptive contaminants (EDCs)
DDT and NPEs
Main source: waste water treatment plants
treatment processes (photodegradation, biodegradation)
results in feminization of male fish
affects fetuses an embryos

DDT and Metabolites

- C14H9C15

- residue of pesticides

- DDD and DDE (C14H10C14, C14H8C17)

- adverse effects

- accumulation

- direct mortality

- anatomical changes: reproduction

-embryos and birds

egg thinning

- toxicity

Sparrow Hawk Egg

DDT biaccumulative steps in food chain

Alkylphenol Ethoxylates (APEs)

- chemical culprits

- breakdown of detergents and plastics

- broader category of surfactants (NPEs and NPs)

- potential substitute?

- toxicity?

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