Growth Black drum

weight vs. length black drum based on data calcasieu estuary, louisiana. (fall female curve obscured spring female curve. data jenkins, 2004)



length vs. age black drum 2 gulf coast locations.

annual growth rate ages 1–3 100–150 mm/year-1and slows 10–50 mm/year ages 10–20 . studies have reported black drum weighing more 60 kg on atlantic coast , believed live 60 years. other studies suggest black drum in gulf of mexico not grow large or live long; in sample of 1357 black drum coastal louisiana, largest individual 22.6 kg , oldest 44 years. length vs. age graph shows how typical length of black drum increases age. weight vs. length graph shows how typical weight of black drum increases length; small differences during different seasons have been measured shown. kind of information can used estimate weight based on length. more scientifically, can used determine whether given sample of black drum above or below expected weight, may related number of environmental conditions.