Abstract
Eleven enzymes coded by 15 loci (ADH*, SOD*, SDH*, LDH-1*, LDH-2*, ME-1*, ME-2*, GPI-1*, GPI-2*, IDH*, MDH-1*, MDH-2*, PGM*, AAT* and CK*) were studied using electrophoretic methods in order to characterize stocks of sardines from the western Mediterranean Sea. The results showed differentiated groups distributed throughout the area studied. They did not form a panmictic population, but they existed as semi-independent, although not completely isolated, breeding units with an estimation of migration of Nem = 3.1 (number of migrants per generation). In the LDH-1 system a north-south cline was detected. We have also detected a discontinuity between the Alboran and the rest of the Mediterranean populations sampled at the enzymatic level. This result confirms the action of the Almeria–Oran front as a barrier that produces discontinuities as detected in other marine species.
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Ramon, M., Castro, J. Genetic variation in natural stocks of Sardina pilchardus (sardines) from the western Mediterranean Sea. Heredity 78, 520–528 (1997). https://doi.org/10.1038/hdy.1997.81
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DOI: https://doi.org/10.1038/hdy.1997.81
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