Allozyme variability in populations of trout (Salmo trutta) from the rivers of Russia and Iran.

Vahid Taghizadeh,Abdolreza Jahanbakhshi,Gerigori Genadevich Novikov

doi:10.1186/2193-1801-1-48

Vahid Taghizadeh, Abdolreza Jahanbakhshi + Show 1 more

Open Access

https://doi.org/10.1186/2193-1801-1-48

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Abstract

For the first time, an analysis was carried out of allozyme variability in trout (Salmo trutta) from three rivers of Iran. We studied 23 gene loci coding enzymes: glycerol-3-phosphate dehydrogenase (G3PDH), aspartate aminotransferase (AAT), malate dehydrogenase (MDH), lactate dehydrogenase (LDH), creatine kinase (CK), malic enzyme [NADP-dependent MDH] (MEP), superoxide dismutase (SOD), esterase (EST), and esterase D (EST–D). The obtained data demonstrate the similarity between the trout samples from different rivers of Iran according to genetic characteristics. Taking into account the differences by allozyme markers of allele frequencies and allele composition of some loci, we should expect that Iranian trout diverges significantly in genetics from the other trout populations of the Caspian Sea.

Highlights

Trout (Salmo trutta) is distributed in a wide area covering a significant part of Europe, the western part of Asia, and the northern part of Africa (Berg 1948; Reshetnikov et al 2002)
Trout of the Caspian Sea Basin belongs to one of the most valuable commercial fishes of the region, the commercial importance of which increases as the resources of salmon fishes decrease
The population-genetic analysis we carried out using a sum total of 23 enzyme loci, 10 of which were polymorphic (Table 1)

Summary

Introduction

Trout (Salmo trutta) is distributed in a wide area covering a significant part of Europe, the western part of Asia, and the northern part of Africa (Berg 1948; Reshetnikov et al 2002). Trout of the Caspian Sea Basin belongs to one of the most valuable commercial fishes of the region, the commercial importance of which increases as the resources of salmon fishes decrease. Natural populations of trout are preserved in many rivers in the territory of Iran, but they are endangered because of a permanently increasing anthropogenic impact including mining (especially coal mining) in the northern part of Iran, where the main spawning rivers of this species are situated. The problems of protection and rational use of trout resources cannot be solved without accounting the population structure of this species. Monitoring of results of industrial activity becomes a more and more important general biological task

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