Age and growth of black drum (Pogonias cromis Linneaus) from Galveston Bay


May 1984


Massey, Julie Kay

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Texas A&M University


Age and growth determinations were made for 487 black drum gill netted from Galveston Bay during September 1981 through August 1982. Scales, otoliths and length-frequency distribution yielded similar age and growth determinations for black drum ranging from 140 to 400 mm standard length and 1 to 3 years old. Mean standard length for drum at age 1,2 and 3 was 182, 283 and 369 mm. respectively. The theoretical growth equation developed for black drum through age 3 was lt = 640(1-e-0.2783(t+0.1562)). Standard and total length-weight relationships were log W = 2.939 log SL - 4.24 and log W = 3.038 log TL -4.958, respectively. The relationship of standard length to total length was TL = 13.199 + 1.209 SL. Results from this study are comparable with length-age determinations for drum from other areas along the Gulf of Mexico and Chesapeake Bay.


38 pages


population dynamics, gillnets, biological age, growth, black drum, Pogonias cromis, length-weight relationships