The present situation of freshwater crayfish, Astacus leptodactylus (Eschscholtz, 1823) in Turkey

Harlıoğlu, Muzaffer Mustafa

doi:10.1016/s0044-8486(03)00429-0

Cited by 78 publications

(56 citation statements)

References 7 publications

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“…Crayfish plague epidemics started in Turkey 1985 and devastated most of the native narrow clawed crayfish stocks. Lake İznik stock has been considered productive before the epidemics and was one of the few stocks that has been producing commercially even after the epidemics, with an estimated annual production of 80-245 ton (Baran and Soylu, 1989b;Balik et al, 2002;Harlioğlu, 2004) and an estimated CPUE from 1.13 to 2.18 in year 2000 survey (Balik et al, 2002). The stock in Lake İznik has shown gross symptoms of infection, melanised lesions and tissue erosion, since 1980's epidemics (Harlioğlu, 2008).…”

Section: Resultsmentioning

confidence: 99%

“…The stock collapses in Turkey were partial in some water bodies with up to 25% survival (Harlioglu and Harlioglu, 2006;Bolat et al, 2011). The collapsed narrow clawed crayfish stocks have later recovered substantially in Turkey Güner and Harlioğlu, 2010), but are often still showing severe gross disease symptoms, such as melanisation and erosion of the tail (Baran and Soylu, 1989a;Rahe and Soylu, 1989;Harlioğlu, 2004). Similar symptoms have been described in the signal crayfish (Pacifastacus leniusculus) non-lethally carrying the crayfish plague (A. astaci) (SoutyGrosset et al, 2006).…”

Section: Introductionmentioning

confidence: 89%

“…Water bodies in British Isles, Norway and Turkey remained long the last safe havens for the European crayfish (Souty-Grosset et al, 2006) until mid 1980's, after which many productive native narrow clawed crayfish (Astacus leptodactylus) stocks collapsed in Turkey (Holthuis, 1961;Rahe and Soylu, 1989;Harlioğlu, 2004). As a result, the crayfish trapping and export ceased from Turkey to Europe.…”

Section: Introductionmentioning

confidence: 99%

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Recovering Turkish narrow clawed crayfish (Astacus leptodactylus) populations carryAphanomyces astaci

Kokko

Koistinen

Harlıoğlu

et al. 2012

Knowl. Managt. Aquatic Ecosyst.

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Crayfish stocks collapsed in Turkey in mid 1980's due to crayfish plague epidemics, with up to 25% survival in some cases. The collapsed stocks have then recovered slowly and commercial crayfish fishery was reinitiated gradually within a decade. We examined the prevalence of Aphanomyces astaci DNA in the narrow clawed crayfish (Astacus leptodactylus) collected from two Turkish lakes, Lake İznik and Hirfanlı Dam (N = 40 from both sites). The qPCR results, verified by conventional PCR and sequencing, indicated that nearly all sampled crayfish were A. astaci carries with some of them showing gross symptoms of infection, such as tissue erosion and melanisation, while some did not show any visible symptoms. The prevalence of A. astaci DNA was high in both stocks, being on the average 95% in both Lake İznik and Hirfanlı Dam. Our results show that these stocks are carries of A. astaci, but capable of forming productive stocks which indicates past and contemporary partial resistance adaptation in the host or virulence evolution in the A. astaci. RÉSUMÉ Des populations turques d'écrevisses à pattes grêles (Astacus leptodactylus) productives porteuses d'Aphanomyces astaci

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

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Recovering Turkish narrow clawed crayfish (Astacus leptodactylus) populations carryAphanomyces astaci

Kokko

Koistinen

Harlıoğlu

et al. 2012

Knowl. Managt. Aquatic Ecosyst.

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“…It used to be abundant in Lake Balaton, but the introduction of the eel (Anguilla anguilla) caused its extinction in the 1960s (KISZELY, 1994), similarly to the lower stretch of the River Zala, which flows into the lake from the west (PINTÉR and THURÁNSZKY, 1983). Though it is a commercially utilised species in other parts of its range, both where it occurs naturally such as Turkey (HARLIOGLU, 2004) or where it is introduced such as the U.K. (HARLIOGLU and HOLDICH, 2001), there has been little exploitation and no farming or specific research carried out on this species in Hungary.…”

Section: Native Crayfish Distributionmentioning

confidence: 99%

Native and Alien Decapoda Species in Hungary:distribution, Status, Conservation Importance

Puky

Reynolds

Schád³

2005

Bull. Fr. Pêche Piscic.

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Three native (Astacus astacus, Astacus leptodactylus, Austropotamobius torrentium) and three alien (Orconectes limosus, Pacifastacus leniusculus, Eriocheir sinensis)Decapoda species have been found in Hungary so far. A. astacus is the most widespread Decapoda species in Hungary. A. leptodactylus might be considered as the least studied. The distribution of A. torrentium in Hungary is restricted to mountain streams with occasional data on its presence in the adjacent section of the River Danube. The indigenous species A. torrentium and, especially A. astacus, are declining while A. leptodactylus seems to have stable populations. The detection of alien species accelerated at the turn of the century: O. limosus was found at new sites, P. leniusculus was first recorded in the Gyöngyös-stream near the Austrian border in 2000, E. sinensis in the main arm of the Danube at Budapest in November 2003. As there is a lack of information even on the commonest species, conservation-oriented mapping is necessary to follow the distribution changes of Decapoda in Hungary.Key-words: crayfish, alien species, Hungary, distribution, conservation. LES DÉCAPODES INDIGÈNES ET EXOTIQUES EN HONGRIE

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“…Ülkemizde kerevit besin olarak fazla tercih edilmemesine karşın, özellikle Avrupa ülkelerinde oldukça fazla rağbet görmektedir. Türkiye'de değerlendirilmesine 1965 yılından itibaren ilk olarak Manyas ve Apolyont (Ulubat) Göllerinde başlanmış ve giderek artan ihracat hacmiyle büyük önem kazanmışlardır 4,5 .…”

unclassified

Biberiye ve Kekik Esansiyel Yağları Katkısının Marine Edilmiş Kerevitlerin (Astacus leptodactylus Esch., 1823) Raf Ömrüne Etkisinin Belirlenmesi

Duman¹,

Çoban²,

Özpolat³

2012

Kafkas Univ Vet Fak Derg

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ÖzetBu çalışmada, biberiye ve kekik esansiyel yağları uygulanarak marine edilen kerevitlerin 4ºC'de muhafazası sırasında kimyasal [pH ve tiyobarbitürik asit (TBA)], mikrobiyolojik (Toplam aerobik bakteri, psikrofilik bakteri, laktik asit bakterileri ve maya küf bakteri sayımı) ve duyusal niteliklerinde meydana gelen değişimler incelenmiştir. Analiz sonuçlarına göre gruplar arasında pH değeri bakımından istatistiksel olarak fark saptanmamıştır (P>0.05). Ancak TVB-N ve TBA miktarları açısından kontrol grubu ile esansiyel yağ uygulanan gruplar arasındaki farkın önemli olduğu (P<0.05) tespit edilmiştir. Yine muhafaza süresince toplam aerobik bakteri, psikrofilik bakteri, laktik asit bakterileri ve maya küf bakteri sayısı bakımından kontrol grubu ile uygulama grupları arasındaki farkın önemli olduğu bulunmuştur (P<0.05). Duyusal değerlendirme sonuçlarına göre kontrol grubunun raf ömrü 42 gün olarak belirlenirken, biberiye esansiyel yağı uygulanan grubun 56 ve kekik esansiyel yağı uygulanan grubun raf ömrü 70 gün olarak belirlenmiştir. Sonuç olarak, uygulanan esansiyel yağların ürünün raf ömrü üzerine olumlu etki gösterdiği, özellikle kekik esansiyel yağının bu konuda kayda değer olduğu, adı geçen yağların kullanımının ürünün kimyasal ve mikrobiyolojik kalitesi üzerine olumlu etki yaptığı ortaya konmuştur. Anahtar sözcükler: Kerevit, Marinasyon, Biberiye esansiyel yağı, Kekik esansiyel yağı, Esansiyel yağlar, Raf ömrü The Determination of the Effect to Shelf Life of Marinated Crayfish (Astacus leptodactylus Esch., 1823) with Rosemary and Thyme Essential Oils Additive SummaryIn this study, chemical [pH and thiobarbituric acid (TBA)], microbiological (Total aerobic bacteria, psychrophilic bacteria, lactic acid bacteria and yeast-mould count) and sensory analyses were performed to investigate the qualitative changes of crayfish marinated with rosemary and thyme essential oils during the storage at 4ºC. According to the results, statistically no significant difference was found in pH values amongst groups (P˃0.05). However, the difference between control group and essential oils applied groups were significant (P˂0.05) in term of TBA values. During the storage, the difference between control group and essential oils applied groups in term of the total aerobic bacteria, psychrophilic bacteria, lactic acid bacteria and yeast-mould counts were statistically found significant (P˂0.05). The sensory evolution results indicated that the shelf life of marinated crayfish was 42 days for the control, 56 days for the rosemary and 70 days for the thyme essential oils applied groups. In conclusion, essential oils showed a positive effect on the product's shelf-life; particularly thyme essential oil is noteworthy in this regard. The use of oils mentioned was a positive impact on the chemical and microbiological quality of the products.

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The present situation of freshwater crayfish, Astacus leptodactylus (Eschscholtz, 1823) in Turkey

Cited by 78 publications

References 7 publications

Recovering Turkish narrow clawed crayfish (Astacus leptodactylus) populations carryAphanomyces astaci

Recovering Turkish narrow clawed crayfish (Astacus leptodactylus) populations carryAphanomyces astaci

Native and Alien Decapoda Species in Hungary:distribution, Status, Conservation Importance

Biberiye ve Kekik Esansiyel Yağları Katkısının Marine Edilmiş Kerevitlerin (Astacus leptodactylus Esch., 1823) Raf Ömrüne Etkisinin Belirlenmesi

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