The determination of the spatial and temporal variations of phytoplankton populations contribute ... more The determination of the spatial and temporal variations of phytoplankton populations contribute to set up lake management strategies. It was aimed to investigate the biomass of phytoplankton of large and shallow Lake Beysehir. The lake was sampled monthly from four selected stations and surface, mid and deep layers between March and December 2007. The phytoplankton biomass was estimated from counted cell size. A total of 119 phytoplankton species from Bacillariophyta (42), Chlorophyta (48), Chrysophyta (1), Cryptophyta (4), Cyanobacteria (9), Pyrrophyta (5) and Euglenophyta (10) were identified. Total phytoplankton biomass consisted of Bacillariophyta (53%), Chlorophyta (27%), Chrysophyta (3%), Cryptophyta (2%), Cyanobacteria (10%), Pyrrophyta (4%) and Euglenophyta (2%). Mean values of chlorophyll a, total phosphorus and Secchi depth were measured as 8.24±2.08 mg/m3, 10.46±6.20 mg/m3 and 1.08±0.35 m, respectively. Dissolved oxygen was measured between 6.36±0.06 and 11.63±0.06 mg/l....
Bu calismada, sig bir gol olan Mogan Golu’nde sucul makro tlere gore ekolojik kalitenin tahmin ed... more Bu calismada, sig bir gol olan Mogan Golu’nde sucul makro tlere gore ekolojik kalitenin tahmin edilmesi amaclanmistir. Makro tlerin bollugu, 2003 ve 2013 yillarinda incelenmistir. Mogan Golu’nde sualti makro tlerden 5 tur ( Ceratophyllum demersum L., Chara vulgaris L., Najas marina L., Myriophyllum spicatum L. ve Stuckenia pectinata (L.) Borner) teshis edilmistir. Mogan Golu’nde Makro t Indeksine gore ekolojik kalite Temmuz 2003’de orta olarak tahmin edilirken, Temmuz 2013’de kotu olarak bulunmustur.
This study was carried out to evaluate the growth performance and nutritive value of carp fed die... more This study was carried out to evaluate the growth performance and nutritive value of carp fed diets containing moderate levels of sunflower seed meal (SFM) as a partial replacement of fishmeal. Four diets were formulated as isocaloric and isonitrogenous at incorporation levels of 0% (control), 15%, 30% and 45% SFM and were fed to triplicates group of carp (993.82±11.68 g). Growth, as assessed using a range of biometric parameters and nutrient utilization was determined by muscle content, fatty acids and electrophoretic protein profiles of tissues. Condition factor (CF) and survival (Surv) were unaffected by levels of SFM inclusion though a significant decline in weight gain (WG), protein efficiency rate (PER), absolute (AGR) and specific growth rate (SGR) was observed with increasing inclusion levels of SFM. Feed conversion ratio (FCR) was negatively correlated with SGR and also reflective of feed intake. No significant effects of inclusion were noted among treatments on protein, li...
Bu calismada, sig bir gol olan Mogan Golu’nde sucul makro tlere gore ekolojik kalitenin tahmin ed... more Bu calismada, sig bir gol olan Mogan Golu’nde sucul makro tlere gore ekolojik kalitenin tahmin edilmesi amaclanmistir. Makro tlerin bollugu, 2003 ve 2013 yillarinda incelenmistir. Mogan Golu’nde sualti makro tlerden 5 tur ( Ceratophyllum demersum L., Chara vulgaris L., Najas marina L., Myriophyllum spicatum L. ve Stuckenia pectinata (L.) Borner) teshis edilmistir. Mogan Golu’nde Makro t Indeksine gore ekolojik kalite Temmuz 2003’de orta olarak tahmin edilirken, Temmuz 2013’de kotu olarak bulunmustur.
In this study, carp were fed for 12 weeks with experimental diets incorporated with different rat... more In this study, carp were fed for 12 weeks with experimental diets incorporated with different ratios of sunflower seed meal and the alterations in biochemical parameters of carp fillets during 6 months of frozen storage at -18 °C were determined. In this context, 4 diets were prepared comprising incremental levels of sunflower seed meal (0%-K, 15%-AT15, 30%-AT30, 45%-AT45). Furthermore, the mineral composition (P, Ca, K, Na, Mg, Zn) of experimental diets and fish flesh was assessed and it was concluded that the difference observed in diets regarding with mineral content did not affect the flesh. Through 6 months of storage, TBA, TVB-N and FFA values were determined monthly and TBA, TVB-N and FFA values were increased in all groups corresponding to storage (P<0.05).
This study was carried out to evaluate the phenological changes resulting from external impacts o... more This study was carried out to evaluate the phenological changes resulting from external impacts on Posidonia oceanica meadows along the Aegean coast. Triplicate samples were collected from 17 stations at 8 and 10 m depths by SCUBA diving between April and June 1999. The water temperature was measured and sediment type was determined in the stations. The phenological parameters; shoot density, leaf number, leaf area index, leaf surface area, brown tissue surface area and total biomass were investigated. One of the most important descriptors of Posidonia, shoot density, showed supranormal values at the seven of the meadows while only two of them showed abnormal values. Beside the natural factors such as water temperature and sediment types, the possible environmental or antrophogenic impacts on phenological characters of Posidonia meadows were discussed.
The flowering and fruiting of Halophila stipulacea (Forsskål) Ascherson were followed on the Turk... more The flowering and fruiting of Halophila stipulacea (Forsskål) Ascherson were followed on the Turkish coasts of the Aegean Sea, and both male and female flowers were recorded at the same location for the first time. Male and female flowers were found between mid-April and late September. In shallow coastal water, male flowers were fewer than female flowers, while in deep zones, female flowers were fewer than male flowers. The female flowers of H. stipulacea had three styles, but four styles of flowers were also found exceptionally. At the research stations, the plants and flowers showed a lower limit of 30 m depth and an upper limit of between 1 and 8 m. The upper limit of female plants was 4 m, and that of male plants was 6 m. Besides, flowering was recorded generally in very dense populations.
Bu calismada, farkli oranlarda aycicegi tohumu kuspesi iceren deneme yemleri kullanilarak 12 haft... more Bu calismada, farkli oranlarda aycicegi tohumu kuspesi iceren deneme yemleri kullanilarak 12 hafta sure ile beslenen sazan baliklari, derili fileto halinde 6 ay boyunca -18 oC’de depolanmis ve depolama suresince biyokimyasal parametrelerdeki degisimler belirlenmistir. Bu amacla, artan oranlarda aycicegi tohumu kuspesi iceren (%0-K, %15-AT15, %30-AT30, %45-AT45) 4 adet yem hazirlanmistir. Ayrica, deneme yemlerinde ve balik etinde mineral madde icerigi (P, Ca, K, Na, Mg, Zn) belirlenmis ve deneme yemlerinde mineral madde icerigi bakimindan gozlenen farkliligin balik etine yansimadigi gorulmustur. Donmus depolama suresince TBA, TVB-N ve SYA degerleri aylik olarak degerlendirilmis ve tum gruplarda TBA, TVB-N ve SYA degerlerinde artis tespit edilmistir (P<0.05).
Kizilirmak Nehri’nin Avanos Ilcesi (Nevsehir) icinden gecen bolumunde Mart 2010-Aralik 2010 tarih... more Kizilirmak Nehri’nin Avanos Ilcesi (Nevsehir) icinden gecen bolumunde Mart 2010-Aralik 2010 tarihleri arasinda yurutulen bu calismada, sualti bitki tur/turleri incelenmistir. Sucul makrofit ornekleri, 4 istasyondan ayda bir defa, uc tekrarli olmak uzere alinmistir. Ayrica su derinligi, Secchi derinligi, su sicakligi, cozunmus oksijen, pH ve elektrik iletkenligi yerinde olculmustur. Arastirma alaninda sualti bitkilerinden Stuckenia pectinata (L.) Borner (Taraksi Su Sumbulu) turunun baskin olarak bulundugu tespit edilmis, nadir olarak Ceratophyllum submersum turunun bulundugu belirlenmistir. Sualti bitki biyokutlesi Mart ayindan itibaren artis gostermis, en yuksek degerine (1086 kuru agirlik/m2) Kasim ayinda ulasmis ve ortalama bitki biyokutlesi 720,9± 287,9 kuru agirlik/m2 olarak tahmin edilmistir. Calisma suresince ortalama su derinligi 2,21± 0,45 m, Secchi derinligi 0,90 ± 0,19 m, su sicakligi 10,19 ± 3,33 °C, cozunmus oksijen 12,45 ± 1,0 mg/l, pH 8,01 ± 0,3, elektrik iletkenligi 1178 ± 67 µS/cm olarak olculmustur. Taraksi Su Sumbulunun asiri gelisiminde Kizilirmak Nehri’nde baraj yapimi sonrasinda olusan mudaheleli akim kosullarinin baslica etken oldugu dusunulmektedir. Abstract In this study, submerged plant species were investigated in the part of river Kizilirmak passing through Avanos town (Nevsehir) between March 2010 and December 2010. Aquatic macrophytes were sampled by three replicates once a month from four stations. .Furthermore, water depth, Secchi depth, water temperature, dissolved oxygen, pH and conductivity were measured in situ. The dominant submerged plant in the research area was identified as Stuckenia pectinata (L.) Borner (Sago Pond Weed), Another submerged plant which existed rarely was Ceratophyllum submersum. The underwater plant biomass was increased from March, reached its highest level as 1086 dry weight/ m2 in November and the average plant biomass was estimated as 720,9± 287,9 dry weight/ m2. Throughout this study, the average water depth, Secchi depth, water temperature, dissolved oxygen, pH and conductivity were measured as 2,21± 0,45 m, 0,90 ± 0,19 m, 10,19 ± 3,33 °C, 12,45 ± 1,0 mg/l, 8,01 ± 0,3, 1178 ± 67 µS/cm, respectively. The modified stream course which was occurred after the dam construction in Kizilirmak River could be the main reason of the excessive growth of Sago Pondweed.
The determination of the spatial and temporal variations of phytoplankton populations contribute ... more The determination of the spatial and temporal variations of phytoplankton populations contribute to set up lake management strategies. It was aimed to investigate the biomass of phytoplankton of large and shallow Lake Beysehir. The lake was sampled monthly from four selected stations and surface, mid and deep layers between March and December 2007. The phytoplankton biomass was estimated from counted cell size. A total of 119 phytoplankton species from Bacillariophyta (42), Chlorophyta (48), Chrysophyta (1), Cryptophyta (4), Cyanobacteria (9), Pyrrophyta (5) and Euglenophyta (10) were identified. Total phytoplankton biomass consisted of Bacillariophyta (53%), Chlorophyta (27%), Chrysophyta (3%), Cryptophyta (2%), Cyanobacteria (10%), Pyrrophyta (4%) and Euglenophyta (2%). Mean values of chlorophyll a, total phosphorus and Secchi depth were measured as 8.24±2.08 mg/m3, 10.46±6.20 mg/m3 and 1.08±0.35 m, respectively. Dissolved oxygen was measured between 6.36±0.06 and 11.63±0.06 mg/l....
Bu calismada, sig bir gol olan Mogan Golu’nde sucul makro tlere gore ekolojik kalitenin tahmin ed... more Bu calismada, sig bir gol olan Mogan Golu’nde sucul makro tlere gore ekolojik kalitenin tahmin edilmesi amaclanmistir. Makro tlerin bollugu, 2003 ve 2013 yillarinda incelenmistir. Mogan Golu’nde sualti makro tlerden 5 tur ( Ceratophyllum demersum L., Chara vulgaris L., Najas marina L., Myriophyllum spicatum L. ve Stuckenia pectinata (L.) Borner) teshis edilmistir. Mogan Golu’nde Makro t Indeksine gore ekolojik kalite Temmuz 2003’de orta olarak tahmin edilirken, Temmuz 2013’de kotu olarak bulunmustur.
This study was carried out to evaluate the growth performance and nutritive value of carp fed die... more This study was carried out to evaluate the growth performance and nutritive value of carp fed diets containing moderate levels of sunflower seed meal (SFM) as a partial replacement of fishmeal. Four diets were formulated as isocaloric and isonitrogenous at incorporation levels of 0% (control), 15%, 30% and 45% SFM and were fed to triplicates group of carp (993.82±11.68 g). Growth, as assessed using a range of biometric parameters and nutrient utilization was determined by muscle content, fatty acids and electrophoretic protein profiles of tissues. Condition factor (CF) and survival (Surv) were unaffected by levels of SFM inclusion though a significant decline in weight gain (WG), protein efficiency rate (PER), absolute (AGR) and specific growth rate (SGR) was observed with increasing inclusion levels of SFM. Feed conversion ratio (FCR) was negatively correlated with SGR and also reflective of feed intake. No significant effects of inclusion were noted among treatments on protein, li...
Bu calismada, sig bir gol olan Mogan Golu’nde sucul makro tlere gore ekolojik kalitenin tahmin ed... more Bu calismada, sig bir gol olan Mogan Golu’nde sucul makro tlere gore ekolojik kalitenin tahmin edilmesi amaclanmistir. Makro tlerin bollugu, 2003 ve 2013 yillarinda incelenmistir. Mogan Golu’nde sualti makro tlerden 5 tur ( Ceratophyllum demersum L., Chara vulgaris L., Najas marina L., Myriophyllum spicatum L. ve Stuckenia pectinata (L.) Borner) teshis edilmistir. Mogan Golu’nde Makro t Indeksine gore ekolojik kalite Temmuz 2003’de orta olarak tahmin edilirken, Temmuz 2013’de kotu olarak bulunmustur.
In this study, carp were fed for 12 weeks with experimental diets incorporated with different rat... more In this study, carp were fed for 12 weeks with experimental diets incorporated with different ratios of sunflower seed meal and the alterations in biochemical parameters of carp fillets during 6 months of frozen storage at -18 °C were determined. In this context, 4 diets were prepared comprising incremental levels of sunflower seed meal (0%-K, 15%-AT15, 30%-AT30, 45%-AT45). Furthermore, the mineral composition (P, Ca, K, Na, Mg, Zn) of experimental diets and fish flesh was assessed and it was concluded that the difference observed in diets regarding with mineral content did not affect the flesh. Through 6 months of storage, TBA, TVB-N and FFA values were determined monthly and TBA, TVB-N and FFA values were increased in all groups corresponding to storage (P<0.05).
This study was carried out to evaluate the phenological changes resulting from external impacts o... more This study was carried out to evaluate the phenological changes resulting from external impacts on Posidonia oceanica meadows along the Aegean coast. Triplicate samples were collected from 17 stations at 8 and 10 m depths by SCUBA diving between April and June 1999. The water temperature was measured and sediment type was determined in the stations. The phenological parameters; shoot density, leaf number, leaf area index, leaf surface area, brown tissue surface area and total biomass were investigated. One of the most important descriptors of Posidonia, shoot density, showed supranormal values at the seven of the meadows while only two of them showed abnormal values. Beside the natural factors such as water temperature and sediment types, the possible environmental or antrophogenic impacts on phenological characters of Posidonia meadows were discussed.
The flowering and fruiting of Halophila stipulacea (Forsskål) Ascherson were followed on the Turk... more The flowering and fruiting of Halophila stipulacea (Forsskål) Ascherson were followed on the Turkish coasts of the Aegean Sea, and both male and female flowers were recorded at the same location for the first time. Male and female flowers were found between mid-April and late September. In shallow coastal water, male flowers were fewer than female flowers, while in deep zones, female flowers were fewer than male flowers. The female flowers of H. stipulacea had three styles, but four styles of flowers were also found exceptionally. At the research stations, the plants and flowers showed a lower limit of 30 m depth and an upper limit of between 1 and 8 m. The upper limit of female plants was 4 m, and that of male plants was 6 m. Besides, flowering was recorded generally in very dense populations.
Bu calismada, farkli oranlarda aycicegi tohumu kuspesi iceren deneme yemleri kullanilarak 12 haft... more Bu calismada, farkli oranlarda aycicegi tohumu kuspesi iceren deneme yemleri kullanilarak 12 hafta sure ile beslenen sazan baliklari, derili fileto halinde 6 ay boyunca -18 oC’de depolanmis ve depolama suresince biyokimyasal parametrelerdeki degisimler belirlenmistir. Bu amacla, artan oranlarda aycicegi tohumu kuspesi iceren (%0-K, %15-AT15, %30-AT30, %45-AT45) 4 adet yem hazirlanmistir. Ayrica, deneme yemlerinde ve balik etinde mineral madde icerigi (P, Ca, K, Na, Mg, Zn) belirlenmis ve deneme yemlerinde mineral madde icerigi bakimindan gozlenen farkliligin balik etine yansimadigi gorulmustur. Donmus depolama suresince TBA, TVB-N ve SYA degerleri aylik olarak degerlendirilmis ve tum gruplarda TBA, TVB-N ve SYA degerlerinde artis tespit edilmistir (P<0.05).
Kizilirmak Nehri’nin Avanos Ilcesi (Nevsehir) icinden gecen bolumunde Mart 2010-Aralik 2010 tarih... more Kizilirmak Nehri’nin Avanos Ilcesi (Nevsehir) icinden gecen bolumunde Mart 2010-Aralik 2010 tarihleri arasinda yurutulen bu calismada, sualti bitki tur/turleri incelenmistir. Sucul makrofit ornekleri, 4 istasyondan ayda bir defa, uc tekrarli olmak uzere alinmistir. Ayrica su derinligi, Secchi derinligi, su sicakligi, cozunmus oksijen, pH ve elektrik iletkenligi yerinde olculmustur. Arastirma alaninda sualti bitkilerinden Stuckenia pectinata (L.) Borner (Taraksi Su Sumbulu) turunun baskin olarak bulundugu tespit edilmis, nadir olarak Ceratophyllum submersum turunun bulundugu belirlenmistir. Sualti bitki biyokutlesi Mart ayindan itibaren artis gostermis, en yuksek degerine (1086 kuru agirlik/m2) Kasim ayinda ulasmis ve ortalama bitki biyokutlesi 720,9± 287,9 kuru agirlik/m2 olarak tahmin edilmistir. Calisma suresince ortalama su derinligi 2,21± 0,45 m, Secchi derinligi 0,90 ± 0,19 m, su sicakligi 10,19 ± 3,33 °C, cozunmus oksijen 12,45 ± 1,0 mg/l, pH 8,01 ± 0,3, elektrik iletkenligi 1178 ± 67 µS/cm olarak olculmustur. Taraksi Su Sumbulunun asiri gelisiminde Kizilirmak Nehri’nde baraj yapimi sonrasinda olusan mudaheleli akim kosullarinin baslica etken oldugu dusunulmektedir. Abstract In this study, submerged plant species were investigated in the part of river Kizilirmak passing through Avanos town (Nevsehir) between March 2010 and December 2010. Aquatic macrophytes were sampled by three replicates once a month from four stations. .Furthermore, water depth, Secchi depth, water temperature, dissolved oxygen, pH and conductivity were measured in situ. The dominant submerged plant in the research area was identified as Stuckenia pectinata (L.) Borner (Sago Pond Weed), Another submerged plant which existed rarely was Ceratophyllum submersum. The underwater plant biomass was increased from March, reached its highest level as 1086 dry weight/ m2 in November and the average plant biomass was estimated as 720,9± 287,9 dry weight/ m2. Throughout this study, the average water depth, Secchi depth, water temperature, dissolved oxygen, pH and conductivity were measured as 2,21± 0,45 m, 0,90 ± 0,19 m, 10,19 ± 3,33 °C, 12,45 ± 1,0 mg/l, 8,01 ± 0,3, 1178 ± 67 µS/cm, respectively. The modified stream course which was occurred after the dam construction in Kizilirmak River could be the main reason of the excessive growth of Sago Pondweed.
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