Definitions:
Blank: this is the tap water that the stomachs were rinsed with, 
       which contain MPs, so we had to correct for that
	   
Code: this is the condition of the carcass (code 1-alive; 
      code 2- fresh dead; code 3-moderately decomposed; 
	  code 4-severely decomposed; code 5-skeletal)
	  
HI: human interaction (fishery interaction, shot, boat strike, 
    marine debris, etc)
	
fiber (elongated, string-like) 
fragment (irregular shaped plastic), 
films (sheet-like appearance) and 
foams (styrofoam-like)