Most people assume evolution is a process that takes place gradually over thousands of years. But the Atlantic tomcod has evolved, in just 50 years, to become resistant to toxic chemicals that for ...
Tomcod (Microgadus tomcod) in the St. Lawrence estuarine transition zone (ETZ) undergo an ontogenetic habitat shift. Older age classes, characterised by a maledominated sex ratio, disperse downstream ...
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