Table 4. Percentages of change in biomass for commercially important trophic groups of prey, by different marine mammals groups, in the seven study ecosystems.

Ecosystem model	Trophic groups	No MM	No pinnipeds	No dolphins	No whales	No toothed whales	No baleen whales
Bering Sea	Predator fish	160.2	39.0	-	18.5	13.3	4.1
	Forage fish	−21.0	−33.6	-	−48.4	−45.6	0.5
	Cephalopods	-	-	-	-	-	-
	Benthos	53.1	15.4	-	38.0	35.4	−3.9
	Plankton	-	-	-	-	-	-
Gulf of St.	Predator fish	19.7	8.3	-	6.7	-	-
Lawrence	Forage fish	4.2	0.7	-	−23.67	-	-
	Cephalopods	-	-	-	-	-	-
	Benthos	0.01	−0.1	-	0.1	-	-
	Plankton	−9.0	−6.5	-	−3.9	-	-
Benguela	Predator fish	−8.9	−7.1	-	−5.1	-	-
	Forage fish	−4.5	−1.5	-	11.4	-	-
	Cephalopods	−8.7	−11.1	-	−15.4	-	-
	Benthos	-	-	-	-	-	-
	Plankton	-	-	-	-	-	-
Eastern tropical	Predator fish	8.9	-	1.5	-	7.1	0.2
Pacific	Forage fish	-	-	-	-	-	-
	Cephalopods	-	-	-	-	-	-
	Benthos	-	-	-	-	-	-
	Plankton	-	-	-	-	-	-
North Sea	Predator fish	2.0	2.0	-	-	-	-
	Forage fish	1.5	1.5	-	-	-	-
	Cephalopods	-	-	-	-	-	-
	Benthos	-	-	-	-	-	-
	Plankton	-	-	-	-	-	-
Gulf of	Predator fish	90.1	-	-	-	-	-
Thailand	Forage fish	181.2	-	-	-	-	-
	Cephalopods	74.1	-	-	-	-	-
	Benthos	3.1	-	-	-	-	-
	Plankton	−18.6	-	-	-	-	-
Strait of Georgia	Predator fish	−7.5	−6.0	-	-	−2.2	-
	Forage fish	-	-	-	-	-	-
	Cephalopods	-	-	-	-	-	-
	Benthos	-	-	-	-	-	-
	Plankton	-	-	-	-	-	-