Reproduction and larval biology in tunas, and the importance of restricted area spawning grounds
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AuthorsMuhling, B.A. (Barbara A.); Lamkin, J.T. (John T.); Alemany, F. (Francisco); García-García, A. (Alberto); Farley, J. (Jessica); Ingram, G.W. (G. Walter); Álvarez-Berastegui, D. (Diego); Reglero, P. (Patricia); Laiz-Carrión, R. (Raúl)
Life history strategy
Tunas show a wide variety of life history strategies, spatial distributions and migratory behaviors, yet they share a common trait of spawning only in tropical and sub-tropical regions. The warm-water tuna species generally show significant overlap between spawning and feeding grounds, and longer spawning seasons of several months to near year-round. In contrast, the cool-water bluefin tunas migrate long distances between feeding and spawning grounds, and may spawn over periods as short as 2 months. Here, we examine the spatial distributions of tuna larvae in the world’s oceans, and examine interspecific differences in the light of adult behaviors and larval ecology. We discuss the links between larval tuna and their oceanographic environments and relate these to current knowledge of larval growth, feeding and trophodynamics, with a focus on the better-studied bluefin tunas. We show that larval tunas have moderate to fast growth rates and selective feeding habits, and thus appear to be ...
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