predationMortalityBifrost
predationMortalityBifrost calculates <species>ConsumedByCodThisPartTimestep where <species> can be capelin cod or otherFood, The consumption is multiplied by 0.5 to account for each part of timestep divided in two because catch is applied in the middle. A call to evaluateCodDecrease gives predationMortalityCod