The other thing to take into consideration is the size of the fish compared to the size of the bass. It doesn't matter if the gams are 30% more the j/g of BG, if the LMB have to expend 50% more calories catching gams to equal the weight of the BG then the LMB is at a net loss. Size of forage matters too.
One may not assume that LMB expend more energy on small prey than on large prey. This is simply not the case. Small prey have a very high probability of capture where large prey have very low probability of capture. LMB expend more energy to catch a single large prey than a single small one.
