Great question. I'll have to take a look at the published data.
Here is an article that esmitate a population of 1,665 sperm whales in the Gulf. All of this is new to me. Interesting and disturbing, in parts. Biologists with the Minerals Management Service are attempting to identify the fish and squid species preferred by the esmitated 1,665 sperm whales that call the Gulf their home. Gulf sperm whales are genetically distinct and smaller than sperm whales found in other oceans. Research indicates that the Gulf sperm whale subspecies can sustain no more than an average 2.8 human-caused deaths each year without threatening its recovery to a non-endangered status.
Very interesting post. I'll have to take a look at the published data. Thanks