Sürdürülebilir Kalkınma Amaçları

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• MakaleAçık Erişim2018Scopus SJRQ2/r/munzur/3114
  Observations of crayfish plague infections in commercially important narrow-clawed crayfish populations in Turkey

  Kokko, Harri; Harlioglu, Muzaffer M.; Aydin, Hamdi; Makkonen, Jenny; Gökmen, Gökhan; Aksu, Önder; Jussila, Japo

  We studied the presence of possible Aphanomyces astaci infections in eight Turkish narrow-clawed crayfish (Astacus leptodactylus) populations by analyzing the prevalence and genotypes of the disease agent A. astaci. The qPCR analyses revealed A. astaci infection in seven of the studied eight populations, with the agent level A2 or higher. The agent levels among the infected populations varied from A0 to A5, i.e., from negative to high level of infection, based on qPCR ranking. Based on the sequencing of the chitinase gene and the mitochondrial ribosomal rnnS and rnnL subunits, we detected both A (As) and B (PsI) haplogroups of A. astaci in our samples, with each of the studied populations being carriers of only one haplotype. The results confirm previous detections of A. astaci in Turkish narrow-clawed crayfish populations and reveal, that both A and B haplogroup A. astaci carriers exist widely in A. leptodactylus populations of Turkey.

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  AtıfScopus28·WoS29·OpenAlex23

  İncele
• Derleme MakaleAçık Erişim2011Scopus SJRQ2/r/munzur/4619
  Status of freshwater crayfish (Astacus leptodactylus) in Iran

  Karimpour, M.; Harlioglu, M. M.; Aksu, O.

  Iranian native crayfish includes one crayfish species, Astacus leptodactylus, with two subspecies, A. l. leptodactylus (lives in freshwater) and A. l. eichwaldi (lives in the Caspian Sea with 12 ppt salinity). Only A. leptodactylus is commonly distributed in Iranian water resources. Nearly 80 years ago local fishermen started to catch Anzali Lagoon crayfish and sold them to foreigners and embassy employees. The consumption of crayfish in Iran is very low, approximately 1 t annually. The first commercially significant crayfish harvest in Iran was 11.3 t from Anzali Lagoon in 1985. It was carried out by a Turkish company. In 1985, the introduction of A. leptodactylus was started into suitable Iranian freshwaters. For example, crayfish from Anzali Lagoon were introduced into Arass water reservoir in 1985. Today, Arass water reservoir is the main resource of crayfish in Iran. There was no further crayfish harvest in Iran until 1993. In that year, a private Iranian company began harvesting the Iranian crayfish and exporting them to European countries. In 1993, 3.2 t of crayfish were exported from Iran. Although there have been fluctuations between years, the export of crayfish in Iran increased remarkably after 1996. The successful results of crayfish introductions gave rise to this increase. In 2003, the export of A. leptodactylus from Iran reached the maximum level (216 t). The commercial value of exported crayfish between 2000 and 2009 varied from 1.5-2.5 million US$ annually and its amount was 106-211.5 t. However, there was a reduction in the export of A. leptodactylus from Iran after 2003, to just above 100 t. In conclusion, in order to increase crayfish production in Iran, introduction of A. leptodactylus into suitable water resources, and management, conservation and monitoring of present crayfish populations should be carried out.

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  AtıfWoS21·OpenAlex26

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