> it seems far more likely that information pertinent to predicting their migratory movements and periods of aggregation, i.e. mating and birthing when they are

> it seems far more likely that information pertinent to predicting their migratory movements and periods of aggregation, i.e. mating and birthing when they are predicably located in some number and relatively vulnerable, would be of greatest importance for survival That's more or less the only relevant statement I found, but I didn't read the paper start to finish.