Skip to main content

Free Content Ecology and Growth of Juvenile Tarpon, Megalops Atlanticus, in a Georgia Salt Marsh

Download Article:
 Download
(PDF 1058.1787109375 kb)
 

Abstract:

Juvenile tarpon were found in both still and flowing dark water in marsh pools and creeks on Sapelo Island, Georgia. These fish grew approximately three centimeters per month. Two populations of juveniles were found during 1964: a resident population and a second one driven shoreward from the Gulf Stream by hurricane Dora. Tarpon from the second population grew approximately half as fast as those of the first population. Fish in the second influx encountered lower temperatures and less abundant food earlier in their existence than did those of the first population. The latter were probably the only ones to survive to migrate to warmer waters late in November.

Postlarval tarpon are strictly carnivorous and they are predominantly piscivorous. The principal food varies with relative availability of different food organisms. The size of the food consumed is directly related to the size of the tarpon. Juveniles less than 125 mm in standard length consumed large numbers of ostracods; shrimps (Palaemonetes spp.) were eaten by tarpon longer than 76 mm in standard length. Fishes, mainly Gambusia affinis, were eaten by tarpon of all sizes sampled. Piscivorous birds appear to be the principal predators of juvenile individuals of Megalops.

Document Type: Research Article

Publication date: 1968-03-01

More about this publication?
  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • Terms & Conditions
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more