Reproduction of Thunnus alalunga
Document source: http://www.fishbase.org/Reproduction/FishReproSummary.php?ID=142&StockCode=156
 
Main Ref. Collette, B.B. and C.E. Nauen, 1983
Mode dioecism
Fertilization external
Spawning frequency
Batch spawner Yes.   Ref.  Collette, B.B. and C.E. Nauen, 1983
Reproductive guild nonguarders
open water/substratum egg scatterers
Description of life cycle and mating behavior The sex ratio in catches is about 1:1 for immature individuals, but males predominate among mature fishes, which is possibly due to both differential mortality of sexes and differential growth rate after maturity.
Search for more references on reproduction Scirus
(e.g. 9948)
( e.g. cephalopods )
Entered by Luna, Susan M. on 10.19.90
Modified by Agustin, Liza Q. on 10.04.94
Checked by Torres, Armi G. on 03.30.95
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