Browsing by Author "Adizel, O."

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Breeding Ecology of Night Heron (Nycticorax Nycticorax Linne, 1758) in the Lake Van Basin, Turkey
(Pakistan Agricultural Scientists Forum, 2010) Durmus, A.; Adizel, O.
A study on breeding ecology of night heron (Nycticorax nycticorax) was conducted in the Lake Van Basin between 16 February 2006 and 04 October 2007 on four big islands inside the lake and sorrounding wetlands. The night heron only breeds on islands inside the lake in this region because it finds food in wetlands. Trees which numbers had been given previously were observed and, starting from pre-breeding period into March and June, data on nests and breeding were taken. The breeding period was about seven months (March - September). During this period, it was frequently observed that nests from the previous year were repaired and re-used. Both the male and the female repair the nest. Average dimensions of eggs laid on nests were measured as 49.33 +/- 3.2 mm in length, 32.19 +/- 1.35 in width, and with a weight of 29.66 +/- 5.01 grams. The number of eggs laid ranged from 1 to 6 per nest. In 1364 active nests observed within the entire breeding region, 4206 (92 %) of 4576 eggs hatched and 3923 (93 %) of all chicks managed to leave the nest. Brooding periods in 50 nests were observed separately in each breeding season. In 2006, average brooding period during the first period was 25.62 +/- 2.03 and it was 26.22 +/- 1.18 during the second period; in 2007, average brooding period during the first period was 26.10 +/- 1.69 and it was 25.60 +/- 1.76 during the second period. Juvenile growth periods for N. nycticorax have been observed as follows: in 2006, average 39.98 +/- 2.47 days during the first breeding period and 32.68 +/- 1.25 days during the second breeding period; in 2007, average 42.18 +/- 2.60 days during the first breeding period and 34.64 +/- 1.15 days during the second breeding period. A significant statistical difference has been observed between years and even periods in question (P < 0.01).
Determination of Avian Influenza a Viruses in Some Avian Species in Van Lake Basin by Real Time-Pcr, Isolation and Subtyping
(2011) Boynukara, B.; Gulhan, T.; Adizel, O.; Ilhan, Z.; Aksakal, A.; Durmus, A.; Solmaz, H.
In this study, feces samples collected during 37 months from February 2006 to March 2009 from 2013 animals consisting of 47 avian species covering irregular vagrant, transit migrant, winter visitor, migratory and native birds in the Van Lake Basin Turkey were tested by Real-Time PCR (RT-PCR) with respect to Avian Influenza (AI) type A virus M2 gene. Of them, 59 samples (2.9%) were found to be positive. RT-PCR positive samples were examined with the same method with respect to H5N1 and 4 samples (6.8%) were found to be positive. RT-PCR positive 59 samples were inoculated in Embryonated Chicken Egg (ECE) and AI type A virus was isolated from 12 samples (20.3%). Of the isolates, 3 were typed as H1N7, 2 as H7N9, 2 as H11N9 and 1 as H8N4 with Hemagglutination Inhibition (HI) and Neuraminidase Inhibition (NI) tests. About 4 isolates obtained from winter visitor Anas cylpeata which had been determined as H5N1 by RT-PCR and agarose gel electrophoresis, gave positive reaction by HI test both with HI and H5 antisera and all were typed as Nl by Nl-test. Feces samples found to be positive by RT-PCR belonged to avian species Anseriformes, Charadriiformes, Pas seriformes, Gruiformes and Phoenicopteriformes orders. The highest positivity was determined in winter visitor Anas acuta (37.1%) and Anas penelope (22.5%) ducks. Of the RT-PCR positive 59 samples, 43 (72.9%) were determined in the samples collected during winter and spring of 2006-2009. Positivity was determined at a rate of 35.2% in respect of AI type A by RT-PCR in different species sharing the same time and place. With this study, the presence of AI type A viruses in various wild birds in the Van Lake Basin was determined for the first time in Turkey. © Medwell Journals, 2011.
Preliminary Study on Newly Detected Yayliyaka Marshes in the Lake Van Basin, Turkey
(Pakistan Agricultural Scientists Forum, 2010) Adizel, O.; Durmus, A.; Kiziroglu, I.
Yayliyaka Marshes (38 degrees, 49' N; 043 degrees, 23' E) is located between Yayliyaka and Kumluca Villages in the southeast shore of Lake Van. The area did not grab attention of researches because of its distance from the high way. Its length is 8.5 km and has 10-12 km(2) surface area approximately. Review of the ornithological and ecological studies carried out in previous years revealed that no information related to this area exists. As many as 137 bird species belonging to 39 families (2 of them are subspecies) were identified in the study area. Of these, 67 (48.9%) are migrant species (summer migrant), 50 (36.5%) are resident, 19 (13.87%) are winter visitors and 1 (0.73%) is transit migratory These species belong to different IUCN Red List Categories including; 2 (1.46%) species are critically endangered, 4 (2.9%) are endangered, 17 (12.4%) are vulnerable, 16 (11.68%) are near threatened, 88 (64.23%) are least concern, 3 (2.19%) are data deficient and 7 (5.1%) are not evaluated. According to Red Data Book List of Turkey, birds can be categorized as; A. 1.2. 12 (8.76%), A.2. 22 (16.05%), A.3. 38 (27.74%), A.3.1. 21 (15.33%), A.4. 14 (10.22%), A.5. 20 (14.6%), B.3. 3 (2.2%), B.3.1. 1 (0.73%), B.4. 3 (2.2%) and B.5. 3 (2.2%). The most convenient protection method in such big basins is to protect the sections where living things live extensively. Therefore, the detection of Yayliyaka Marshes will provide a significant contribution to basin protection plan.
A Statistical Approach on Seasonal Population Changes and Habitat Preferences on Coastal and Waterfowl Species Around Ekşisu Reeds (erzincan-Turkey): Using Negative Binomial Regression
(Corvinus University of Budapest, 2021) Azizoğlu, E.; Adizel, O.; Kara, R.
The present study was performed in order to analyze the population density of 55 coastal and waterfowl species belonging to 15 families in Ekşisu Reeds using negative binominal regression models according to their habitat preferences. For this study, Anas crecca was chosen as a reference species. Population changes of 55 different species were interpreted in relation to it. Accordingly, increases by 4.48 fold (p<0.001) in Anas platyrhynchos population, 3.45 fold (p<0.001) in Fulica atra population, 2.45 fold (p<0.05) in Larus armenicus population (p<0.05), and 1.77 fold (p<0.05) in Tadorna ferruginea population were noted. In addition, the population of 19 species decreased. Of the seasons, autumn was taken as a reference, thus a 1.50 fold-increase (p<0.01) was recorded in the winter season. Changes in other seasons were not statistically significant. When the reed habitat was taken as reference, it was determined that there was a 1.33 times increase (p<0.05) in the water surface habitat and 36% decrease in agricultural areas (p<0.05). Meadows and marshland habitats were not found statistically significant. © 2021, ALÖKI Kft., Budapest, Hungary.