An Assessment of Atlantic Bluefin Tuna (1994) / Chapter Skim
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Appendix C: Genetic Variation in Other Tunas and Related Fish
Appendix C: Genetic Variation in Other Tunas and Related Fish
Pages 127-134
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From page 127... ...
examined RFLPs of m(DNA from 20 yellowf~n tuna sampled from each of five widely spread Pacific Ocean localities (n = 100) and one Atlantic Ocean locality (n = 20~.
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From page 128... ...
found significant frequency differences in blood group alleles between samples from the Atlantic Ocean and the Mediterranean Sea. He also found qualitative immunodiffusion differences between albacore tuna from the Atlantic Ocean and Mediterranean Sea; Atlantic fish had an antigen that was apparently lacking in Mediterranean fish.
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From page 129... ...
Richardson (1983) made an extensive study of 42 isozyme loci in 70 skipjack samples collected throughout the Pacific Ocean and found a longitudinal cline across the central and sou~western Pacific Ocean for an esterase locus and a locus encoding guanine deaminase.
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From page 130... ...
Direct sequencing of the control region of m([) NA, a region of higher variability, provided a similar result: a ubiquitous blue marlin mtDNA lineage found in both ocean basins and a unique mtDNA lineage specific to the Atlantic Ocean (n = 40 [Meyer et al., unpublished results]
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From page 131... ...
In contrast' swordfish throughout Be Atlantic and Pacific Oceans have a more homogeneous genetic stock structure. This observed difference in population structuring among istiophorid billfishes, swordfish, and tunas may reflect differences in exchange rates between ocean basins that ultimately may be associated with the thermal ecology/physiology of each species (many of Be tuna species and swordfish have endothermic capabilities that allow them to move through wider temperature gradients)
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From page 132... ...
1971. Genic polymorphism of tetrazolium oxidase in bluefin tuna, Thunnus thynnus, from the western North Atlantic.
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1980. A preliminary note on migratory tendencies and distributional patterns of Atlantic bluefin tuna based on recently accquired and cumulative tagging results.
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From page 134... ...
Ectoparasites of eastern and western Atlantic bluefin tunas.
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