The second line on antibiotic resistance seems out of place here. Its understandable that Predation and antibiotic production are linked. Further, resistance to predation might imply antibiotic resistance. However, any species resistant to predator (although most probably through resistance to antibiotic) is likely to benefit from nutrients released. This also exemplified by the authors observation that a susceptible species also stands to gain when the predator exhibits preferences among prey. Thus, benefiting from nutrients of the prey is not necessarily linked to resistance to antibiotics.
The introduction and the objective are much clearer on the relation between predation and antibiotic resistance.