Complex sentence: Initially the station was granted a quota of only 50 humpbacks, but this was increased and at its peak, the company took between 900 and 1100 Sperm and Humpback whales each year for processing.
Split into simpler sentences: Initially the station was granted a quota of only 50 humpbacks. In its peak, the company took between 900 and 1100 Sperm and Humpback whales each year for processing.