In the present study, a comparison of the otolith morphology of Alburnus tarichi, collected from different localities throughout Van Basin was carried on. A total of 351 specimens of A.tarichi collected by trammel nets from four different localities (Van, Erçek, Nazik, Aygır) during the period April-May 2015 were examined. Fork length and body weight of the specimens ranged between 9.9-24.6 cm and 8.4-176.5 g, respectively. Lagenar otoliths were removed discriminating as left and right. Otolith length (OL), otolith breadth (OB) and otolith weight (OW) were collected. Comparisons of right-left otolith measurements were tested by paired t test. Comparisons of otolith breadth, length and weight of A. tarichi among all localities were tested by ANOVA. There were no significant difference in terms of otolith length and weight between right and left otoliths but there were statistically significant difference in terms of otolith breadth between the specimens collected in Lake Van and Lake Erçek. There were no differences between right and left otolith measurements in Lake Nazik and Lake Aygır. Comparing all localities together, otolith length, breadth and weight were different from each other for four localities. The power model was applied to estimate the relationships between the otolith measurements and fish length.

Özet: Bu çalışma Van Gölü Havzası su kaynakları için endemik olan inci kefalinin (Alburnus tarichi (Guldenstaedtii, 1814)) yayılım bölgelerini belirlemek amacıyla yapılmıştır. Çalışma alanını Van Gölü Havzasında yer alan akarsu ve göller oluşturmuştur. İnci kefalinin Nazik, Van, Erçek ve Aygır Gölleri ile Koçköprü Baraj Göllerinde populasyonlara sahip olduğu belirlenmiştir. Ayrıca üreme dönemi olan Mayıs-Haziran aylarında adı geçen göller ve baraj gölünü besleyen su kaynaklarına giriş yaptığı saptanmıştır.

Bu çalışmada Van merkezde içme suyu olarak şebekelere verilen farklı kaynakların fiziksel, kimyasal ve mikrobiyolojik açıdan analizleri yapılarak tüketime uygun olup olmadığı araştırılmıştır. Şebekelerden alınan sularda bulanıklık, elektriksel iletkenlik, sıcaklık, çözünmüş oksijen değerleri, pH yerinde ölçülmüştür. Laboratuvarda biyolojik oksijen ihtiyacı, kimyasal oksijen ihtiyacı, kalsiyum,

No abstract

Distribution of Fish Species in the Van Lake BasinAbstract: This study was carried out to determine the fish species of Van Lake Basin between in 2008-2012. Van Lake Basin is a closed basin that shaped approximately 2.3 % of Turkey. Because of closed basin character, the differences indicated in species diversity. Basin is rich in endemic species diversity with plant and animal species. This richness were reflected to fish species. All of the fish species naturally occurring in the lake basin are consist of endemic species. Alburnus tarichi, Alburnus timarensis, Barbus ercisianus, Capoeta cosswigi and Oxynoemacheilus ercisianus exhibited a natural distribution. Cyprinus carpio, Carassius gibelio, Gambusia holbrooki and Aphanius mento were constituted population from various water sources. In addition, escaped from fish farm sorvaccinated to water resources Oncorhynchus mykiss was unable to create the population. Barbus ercisianus and Capoeta cosswigi shown to create hybrid fish species in Zilan and Deliçay. Cyprinus carpio and Carassius carassius shown to create hybrid fish species in Nazik Lake.

, askıda katı madde ve silisyum analizleri de gerçekleştirilmiştir. Elde edilen sonuçlar ilgili su kalitesi yönetmeliklerine göre değerlendirilmiştir. Gölet sularının askıda katı madde, mangan, molibden ve kobalt değerleri dışında tarımsal faaliyetlerde kullanımının uygun olduğu belirlenmiştir.

No abstract

Van Basin has a rich geographical structure in terms of water resources and endemic fish species. In this study, Ligula intestinalis parasite, which is the host of Barbus ercisianus living in Nemrut Crater Lake, was recorded for the first time. The parasite was described molecularly as well as morphologically. In this context, a primer set was designed for molecular identification for the 28S rRNA gene region of L. intestinalis. Real-Time PCR results with the designed primers gave positive results in all parasite samples. The results were confirmed by a single peak (87) in the HRM analysis.