During the 19th and 20th centuries, many whale populations suffered:

Question

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Commercial hunting in the 19th and 20th centuries led to the depletion of many whale populations to the point of commercial extinction, where there were no longer enough whales to sustain hunting operations. Extinction refers to the complete disappearance of a species, which did not occur for all whale populations, and endemism and adaptive radiation are not relevant to the decline of whale populations. Biotic pollution refers to the introduction of invasive species or diseases, which was not a significant factor in the decline of whales.

During the 19th and 20th Centuries, Many Whale Populations Suffered