Complex sentence: The experiment was a huge success, and the commercial fishery expanded rapidly due to the high level of demand for canned tuna, which became higher than the supply of tuna, causing a significant loss in the albacore tuna population.
Split into simpler sentences: The experiment was a huge success and the commercial fishery expanded rapidly due to the high level of demand for canned tuna. The demand for tuna became higher than the supply of tuna, causing a significant loss in the albacore tuna population.