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Freshwater Crayfish 12(1): 387-395 (1999)

PEER REVIEWED    RESEARCH ARTICLE

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Freshwater crayfish populations Astacus astacus (L.) in northeast Brandenburg (Germany): anaysis of genetic structure using RAPD-PCR

Schulz R and Sypke J  e-mail link

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Abstract

The present status of the freshwater crayfish Astacus astacus (L.) in Northeast Brandenburg, Germany, was estimated by means of mark-and-recapture trapping in summer 1997. With reference to the parameters population size, age structure, sex and health conditions, 2 lakes (0.6 and 3.2 ha) were found to have large and reproducing populations (6,747 and 21,938 individuals), while 1 lake (3.8 ha) had a very small population (55 individuals) with no sign of reproduction. Distribution of juveniles and adults within the lakes depended on habitat types and macrophyte species. The genetic structure of the crayfish stocks in Brandenburg was analysed and compared with that of reference stocks in Bavaria and Schleswig–Holstein using RAPD-PCR. Three random primers revealed a total of 51 bands. Each stock could be identified as a distinct population. Differences between the Brandenburg populations and the reference populations were higher than within the Brandenburg populations. From these results it can be assumed that the stocks in Brandenburg are autochthonous. This situation must be taken into account in conservation and restocking projects. The results suggest further studies and improvements in conservation strategies and in the culture and restocking of crayfish in Northeastern Germany.

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Schulz R and Sypke J. (1999). Freshwater crayfish populations Astacus astacus (L) in northeast Brandenburg (Germany): anaysis of genetic structure using RAPD-PCR. Freshwater Crayfish 12(1):387-395. doi:

 

 

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