Final answer:
In Memo's lifetime, the waters near the fishing village likely saw drastic changes in marine ecosystems as a result of fishery extinctions.
Step-by-step explanation:
While these extinctions do not mean that the last individual of a species has been fished from the ocean, they do indicate a significant reduction of certain species to the point of them becoming ecologically insignificant.
For instance, some species of large fish, such as groupers in the Caribbean and certain species of sharks, may be at risk of extinction from overfishing. Additionally, species with slow-growing populations like whales may face the threat of complete extinction due to hunting.
Other examples include cichlids in Lake Victoria, which were driven to the brink of extinction due to the introduction of the Nile perch, which consumed them, along with other factors such as declining water quality and increased fishing pressure.
It's important to note that the loss of dominant species due to over-harvesting leads to a restructuring of the marine ecosystem, affecting the biodiversity and stability of the marine environment while also impacting human populations reliant on these species for food and livelihood. Streams of smaller species have now become the main catch as larger species have been overfished and reduced in numbers significantly.