Journal of Anatolian Environmental and Animal Sciences
Aras, Çoruh ve Doğu Karadeniz havzaları topografik açıdan ortalama yüksekliği fazla olan nehir ha... more Aras, Çoruh ve Doğu Karadeniz havzaları topografik açıdan ortalama yüksekliği fazla olan nehir havzalarıdır ve Türkiye’nin kuzeydoğusunda yer alır. Yükseltinin fazla olmasından dolayı bu havzalarda birçok yüksek rakımlı göl bulunmaktadır. Ekstrem koşullarından dolayı yüksek rakımlı göller her zaman ilgi duyulan bir konu olmuştur. Bu çalışmada Aras, Çoruh ve Doğu Karadeniz havzalarında yer alan ve 2100 metrenin üzerinde bulunan doğal göllerin fitoplankton biyokütlesinin değerlendirilmesi amaçlanmıştır. Bu amaçla, Aras havzasında bulunan Aygır Gölü (2126 m), Çoruh havzasında bulunan Balık Gölü (2146 m) ve Boğa Gölü (2358 m) ile Doğu Karadeniz havzasında bulunan Camlı Gölü (2757 m) ve Çakır Gölü (2556 m) incelenmiştir. Doğu Karadeniz havzası için 2018 yılında, Aras ve Çoruh havzaları için ise 2019 yılında üç dönemde fitoplankton ve su örnekleri toplanmıştır. Toplamda 48 fitoplankton türü teşhis edilmiştir. Bu göllerin ekolojik durumlarının değerlendirilmesi için fitoplankton biyokütles...
Marine and freshwater aquaculture in Turkey have grown substantially. The first trout farm was es... more Marine and freshwater aquaculture in Turkey have grown substantially. The first trout farm was established in the 1960s and the first marine cage farm for sea bream and sea bass in 1985. From the beginning of the 1970s to 1999 the number of licensed fish farms increased from two to 1,444. Since 1995, the number of cage farms has grown to 57 and production reached 4,100 tons in 1999. Total aquaculture production grew from 3,075 tons in 1986 to 63,000 tons in 1999. Production is dominated by inland production, mainly of trout (Oncorhynchus mykiss), which supplies 60% of the total. From 1995 to 1999, marine production increased from 8,494 tons to 25,230 tons. The major contributors are sea bream (Sparus aurata) and sea bass (Dicentrarchus labrax). Because of the rel- atively high temperatures in the Black Sea, Atlantic salmon (Salmo salar), cultured from the late 1980s to 1997, is no longer grown; only rainbow trout (O. mykiss) in floating net cages is produced. Because of the growing ...
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 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....
An excessive growth of submerged vegetation has been observed in some regions of the Kızılırmak r... more An excessive growth of submerged vegetation has been observed in some regions of the Kızılırmak river. In this research, conducted below Yamula Dam, monthly changes in submerged macrophytes in the river course around Avanos (Nevsehir) were investigated. Submerged plant samples were taken from four stations and some water quality parameters were measured. The submerged plant which had increased excessively was identified as fennel pondweed, Stuckenia pectinata (L.) Börner. Molecular identification using a partial sequence of the ITS region has found that sampled S. pectinata specimens were not closer to sequences belonging to hybrid samples. Rather, nucleotide sequences of analysed fragment of ITS region have shown that the phytogeographic distribution of the haplotype, lies between eastern and western examples. The mean submerged plant biomass was estimated as 721 ± 288 g dry weight/m 2 in the research period. The excessive increase of S. pectinata in the Kızılırmak can be attributed to the regulated flow in the river, and its salt tolerance and preference for hard waters. Since it was the single dominant species of submerged macrophyte in the study area, macrophytes indices could not be applied. Mechanical/physical control was recommended for the control of submerged plant biomass in the area.
This study evaluates the growth performance and nutritive value of carp fed diets containing mode... more This study evaluates the growth performance and nutritive value of carp fed diets containing moderate levels of sunflower seed meal in partial replacement of fishmeal. Four isocaloric and isonitrogenous diets were formulated with 0% (control), 15%, 30%, or 45% sunflower seed meal and fed to triplicate groups of carp (993.82±11.68 g). Growth was 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 and survival were unaffected by the sunflower seed level butweight gain, protein efficiency rate, and absolute and specific growth ratessignificantly declined as the inclusion level rose. Feed conversion ratio negatively correlated with SGR and reflected feed intake. There were no significant effects on protein, lipid, or pH content of fish, but there were slight alterations in dry matter and ash values. Total saturated fatty acids (SFA) and monounsaturated fat...
In this study, the seasonal succession of the diatoms on Phragmites australis community was inves... more In this study, the seasonal succession of the diatoms on Phragmites australis community was investigated in Lake Mogan (Turkey), and the epiphytic diatom community was used to estimate the ecological condition of the lake. Five stations were chosen in the littoral region of the lake, and diatom samples were taken from the P. australis monthly between January and November 2013. Two stations were selected in the pelagial region and chlorophyll a concentrations were determined. Lake water temperature, pH, dissolved oxygen concentration, conductivity and Secchi depths were measured, and total nitrogen, total phosphorus and silicate were analyzed. A total of 61 epiphytic diatom species were identified in Lake Mogan. The dominant species were those with tolerance to α-β mesosaprobic conditions. According to the mean Secchi depth, chlorophyll and total phosphorus concentrations, the lake was eutrophic. The IDG, IPS, DESCY, WAT, IDP and TDI indices, calculated according to epiphytic diatoms, indicated an ecological quality between medium and poor (classes III-IV). Among them, IDG and IPS are recommended for monitoring of ecological status in the lake because these indices also integrated all diatom taxa within the samples. The occurrence of pollution-tolerant species and the fact that most indices showed an ecological quality of medium or poor indicated an increase of organic matter and eutrophication in Lake Mogan.
Bu çalışmada Sakarya Nehri'nin kaynaklarından biri olan Batı Göletinde bulunan tatlı su karidesi ... more Bu çalışmada Sakarya Nehri'nin kaynaklarından biri olan Batı Göletinde bulunan tatlı su karidesi (Palaemonetes turcorum Holthuis, 1961) populasyonunun bazı morfometrik özellikleri araştırılmış ve uzunluk-ağırlık ilişkileri ortaya konmuştur. İncelenen 207 adet bireyde eşey oranı (E:D) 1:0,3 olarak belirlenmiştir. Ortalama toplam uzunluk ve karapaks uzunlukları sırasıyla; 2,95±0,84 cm ve 0,56±0,22 cm, erkeklerde 2,64±0,81 cm ve 0,49±0,21 cm, dişilerde ise 3,64±0,32 cm ve 0,73±0,11 cm olarak saptanmıştır. İncelenen tüm bireyler arasında vücut ağırlığının en yüksek dişilerde (1,10 g) olduğu tespit edilirken, boyca en uzun bireyin erkeklerde (4,50 cm) olduğu gözlenmiştir. Karideslerin vücut ağırlığı ile toplam uzunluk ve karapaks uzunluğu arasındaki eşitlikler ve kondisyon faktörü sırasıyla; W=0,0107xTL 2,8789 (R 2 =0,9121), W=0,8418xCL 2,1023 (R 2 =0,8863), KF 3 =1,012±0.24 ve KF b =1,474±0,64 olarak hesaplanmıştır.
Bu çalışmada rekreaktif amaçlı kullanılan Sarısu Göleti'nin mevcut besin düzeyinin belirlenmesi a... more Bu çalışmada rekreaktif amaçlı kullanılan Sarısu Göleti'nin mevcut besin düzeyinin belirlenmesi amacı ile bazı su kalite parametreleri, klorofil a, fitoplankton kompozisyonu ve sayısı ile zooplankton bolluğu altı ay boyunca incelenmiştir. Su kalite parametrelerine göre gölün besin düzeyi mezoötrofik-ötrofik olarak belirlenmiştir. Söz konusu parametreler Türk Çevre Mevzuatı'na göre tartışılmıştır. Araştırma süresince Bacillariophyceae, Chlorophyceae, Chrysophyceae, Cryptophyceae, Cyanophyceae ve Dinophyceae sınıflarından toplam 31 fitoplankton türü teşhis edilmiştir. Fitoplankton sayısı 495000 hücre/l ile 12808000 hücre/l, klorofil a derişimi ise 1,12 ile 13,2 mg/m 3 arasında değişmiştir. Gölette zooplankton kompozisyonu içinde Rotifera baskın olmuştur. Sonuçlar, gölette hızlı bir ötrofikasyonu işaret etmiştir ve bu nedenle besin maddesi artışı kontrol edilmelidir.
Özet : Bu çal ış mada, Ankara Çay ı 'ndan so ğ utma suyu sa ğ layan Kombine Çevrim Enerji Santral... more Özet : Bu çal ış mada, Ankara Çay ı 'ndan so ğ utma suyu sa ğ layan Kombine Çevrim Enerji Santrali'nin Ankara Çay ı üzerine olas ı etkilerini belirlenmek için su kalitesi (su s ıcakl ığı , çözünmü ş oksijen, pH, Secchi derinli ğ i, ask ı da kat ı madde, amonyak, nitrit, toplam fosfat, BOls, KOI, bulan ı kl ı k, demir, ya ğ ve gres), fitoplankton, zooplankton ve bentik fauna incelenmi ştir. Bu amaçla santral çevresinde Ankara Çay ı üzerinde 6 örnekleme noktas ı belirlenmi ştir. Santral deşarj ı öncesi (1., 2., 3. noktalar) ve sonras ı (5. ve 6. nokta) tüm noktalar 4. s ı n ıf (çok kirli sular) su kalitesindedir. Santral de şarj suyunun kalite parametreleri Türk Çevre Mevzuat] ve Su Ürünleri Yönetmeli ğ ine göre tart ışı lm ıştı r. Ayrıca teş his edilen fitoplankton, zooplankton ve bentik organizmalar genelde kirlili ğe toleransl ı organizmalard ı r. Sonuçlar santral çevresinde Ankara Çay ı n ı n bal ı kçı l ığa uygun olmad ığı n ı göstermektedir.
The relationships between chlorophyll a and some physical and chemical properties of water were i... more The relationships between chlorophyll a and some physical and chemical properties of water were investigated by using multiple linear and nonlinear regression models in Kurtbo ğ az ı and Çaml ı dere reservoirs With these two different approaches chlorophyll a was aimed to be estimate more accurately. The determination coefficients were found as 95% and 82% for multiple linear regression models while 85`)/0 and 7 O % for nonlinear regression models for Kurtbo ğ az ı and Çaml ı dere reservoirs, respectively.
Özet : Kafeslerde çipura ve levrek bal ığı yetiştiriciliğinin fitoplanktona etkisinin belirlenmes... more Özet : Kafeslerde çipura ve levrek bal ığı yetiştiriciliğinin fitoplanktona etkisinin belirlenmesi amac ıyla kafesler civar ı nda ve aç ı kta (kontrol) iki istasyon seçilmi ştir. Fitoplankton say ı s ı , kafes istasyonunda aç ı kta seçilen istasyondan yüksek bulunmuştur (p<0,01). Kafes istasyonunun ldorofı l a değerleri de aç ı kta seçilen istasyondakinden yüksektir. Pennat diatomlar, Rhizosolenta spp., Thalassionema nitzschioldes ve Leptocylindricus danicus türleriyle dominant olarak bulunmuşlard ır. Fitoplankton kompozisyonu aç ıs ı ndan kafes istasyonu ve aç ıkta seçilen istasyon aras ı nda bariz bir farkl ı lı k görülmemiştir.
Abstract The phytoplankton composition of coastal, hyposaline (≅12 gl −1) Lake Bafa in western Tu... more Abstract The phytoplankton composition of coastal, hyposaline (≅12 gl −1) Lake Bafa in western Turkey, was investigated after the alteration of salinity levels in past decades. Lake Bafa, formerly a bay of the Aegean Sea, was separated from the sea as a result of alluvium deposits of ...
and/or bioindicators are used for the monitoring and evaluation of the status of water bodies. Wa... more and/or bioindicators are used for the monitoring and evaluation of the status of water bodies. Water Framework Directive was adopted in 2000 by the European Union. It aims the sustainable use of surface and groundwaters. Phytoplankton, phytobenthos, macrophytes, macroinvertebrates and fish were identified as ecological quality indicators in the implementation of Water Framework Directive in lakes. In this study, the use of phyoplankton functional groups and communities in the assessment of the ecological state of lakes were examined. Furthermore, some literatures in Turkish and European lakes on phytoplankton communities were summarized.
Journal of Anatolian Environmental and Animal Sciences
Aras, Çoruh ve Doğu Karadeniz havzaları topografik açıdan ortalama yüksekliği fazla olan nehir ha... more Aras, Çoruh ve Doğu Karadeniz havzaları topografik açıdan ortalama yüksekliği fazla olan nehir havzalarıdır ve Türkiye’nin kuzeydoğusunda yer alır. Yükseltinin fazla olmasından dolayı bu havzalarda birçok yüksek rakımlı göl bulunmaktadır. Ekstrem koşullarından dolayı yüksek rakımlı göller her zaman ilgi duyulan bir konu olmuştur. Bu çalışmada Aras, Çoruh ve Doğu Karadeniz havzalarında yer alan ve 2100 metrenin üzerinde bulunan doğal göllerin fitoplankton biyokütlesinin değerlendirilmesi amaçlanmıştır. Bu amaçla, Aras havzasında bulunan Aygır Gölü (2126 m), Çoruh havzasında bulunan Balık Gölü (2146 m) ve Boğa Gölü (2358 m) ile Doğu Karadeniz havzasında bulunan Camlı Gölü (2757 m) ve Çakır Gölü (2556 m) incelenmiştir. Doğu Karadeniz havzası için 2018 yılında, Aras ve Çoruh havzaları için ise 2019 yılında üç dönemde fitoplankton ve su örnekleri toplanmıştır. Toplamda 48 fitoplankton türü teşhis edilmiştir. Bu göllerin ekolojik durumlarının değerlendirilmesi için fitoplankton biyokütles...
Marine and freshwater aquaculture in Turkey have grown substantially. The first trout farm was es... more Marine and freshwater aquaculture in Turkey have grown substantially. The first trout farm was established in the 1960s and the first marine cage farm for sea bream and sea bass in 1985. From the beginning of the 1970s to 1999 the number of licensed fish farms increased from two to 1,444. Since 1995, the number of cage farms has grown to 57 and production reached 4,100 tons in 1999. Total aquaculture production grew from 3,075 tons in 1986 to 63,000 tons in 1999. Production is dominated by inland production, mainly of trout (Oncorhynchus mykiss), which supplies 60% of the total. From 1995 to 1999, marine production increased from 8,494 tons to 25,230 tons. The major contributors are sea bream (Sparus aurata) and sea bass (Dicentrarchus labrax). Because of the rel- atively high temperatures in the Black Sea, Atlantic salmon (Salmo salar), cultured from the late 1980s to 1997, is no longer grown; only rainbow trout (O. mykiss) in floating net cages is produced. Because of the growing ...
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 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....
An excessive growth of submerged vegetation has been observed in some regions of the Kızılırmak r... more An excessive growth of submerged vegetation has been observed in some regions of the Kızılırmak river. In this research, conducted below Yamula Dam, monthly changes in submerged macrophytes in the river course around Avanos (Nevsehir) were investigated. Submerged plant samples were taken from four stations and some water quality parameters were measured. The submerged plant which had increased excessively was identified as fennel pondweed, Stuckenia pectinata (L.) Börner. Molecular identification using a partial sequence of the ITS region has found that sampled S. pectinata specimens were not closer to sequences belonging to hybrid samples. Rather, nucleotide sequences of analysed fragment of ITS region have shown that the phytogeographic distribution of the haplotype, lies between eastern and western examples. The mean submerged plant biomass was estimated as 721 ± 288 g dry weight/m 2 in the research period. The excessive increase of S. pectinata in the Kızılırmak can be attributed to the regulated flow in the river, and its salt tolerance and preference for hard waters. Since it was the single dominant species of submerged macrophyte in the study area, macrophytes indices could not be applied. Mechanical/physical control was recommended for the control of submerged plant biomass in the area.
This study evaluates the growth performance and nutritive value of carp fed diets containing mode... more This study evaluates the growth performance and nutritive value of carp fed diets containing moderate levels of sunflower seed meal in partial replacement of fishmeal. Four isocaloric and isonitrogenous diets were formulated with 0% (control), 15%, 30%, or 45% sunflower seed meal and fed to triplicate groups of carp (993.82±11.68 g). Growth was 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 and survival were unaffected by the sunflower seed level butweight gain, protein efficiency rate, and absolute and specific growth ratessignificantly declined as the inclusion level rose. Feed conversion ratio negatively correlated with SGR and reflected feed intake. There were no significant effects on protein, lipid, or pH content of fish, but there were slight alterations in dry matter and ash values. Total saturated fatty acids (SFA) and monounsaturated fat...
In this study, the seasonal succession of the diatoms on Phragmites australis community was inves... more In this study, the seasonal succession of the diatoms on Phragmites australis community was investigated in Lake Mogan (Turkey), and the epiphytic diatom community was used to estimate the ecological condition of the lake. Five stations were chosen in the littoral region of the lake, and diatom samples were taken from the P. australis monthly between January and November 2013. Two stations were selected in the pelagial region and chlorophyll a concentrations were determined. Lake water temperature, pH, dissolved oxygen concentration, conductivity and Secchi depths were measured, and total nitrogen, total phosphorus and silicate were analyzed. A total of 61 epiphytic diatom species were identified in Lake Mogan. The dominant species were those with tolerance to α-β mesosaprobic conditions. According to the mean Secchi depth, chlorophyll and total phosphorus concentrations, the lake was eutrophic. The IDG, IPS, DESCY, WAT, IDP and TDI indices, calculated according to epiphytic diatoms, indicated an ecological quality between medium and poor (classes III-IV). Among them, IDG and IPS are recommended for monitoring of ecological status in the lake because these indices also integrated all diatom taxa within the samples. The occurrence of pollution-tolerant species and the fact that most indices showed an ecological quality of medium or poor indicated an increase of organic matter and eutrophication in Lake Mogan.
Bu çalışmada Sakarya Nehri'nin kaynaklarından biri olan Batı Göletinde bulunan tatlı su karidesi ... more Bu çalışmada Sakarya Nehri'nin kaynaklarından biri olan Batı Göletinde bulunan tatlı su karidesi (Palaemonetes turcorum Holthuis, 1961) populasyonunun bazı morfometrik özellikleri araştırılmış ve uzunluk-ağırlık ilişkileri ortaya konmuştur. İncelenen 207 adet bireyde eşey oranı (E:D) 1:0,3 olarak belirlenmiştir. Ortalama toplam uzunluk ve karapaks uzunlukları sırasıyla; 2,95±0,84 cm ve 0,56±0,22 cm, erkeklerde 2,64±0,81 cm ve 0,49±0,21 cm, dişilerde ise 3,64±0,32 cm ve 0,73±0,11 cm olarak saptanmıştır. İncelenen tüm bireyler arasında vücut ağırlığının en yüksek dişilerde (1,10 g) olduğu tespit edilirken, boyca en uzun bireyin erkeklerde (4,50 cm) olduğu gözlenmiştir. Karideslerin vücut ağırlığı ile toplam uzunluk ve karapaks uzunluğu arasındaki eşitlikler ve kondisyon faktörü sırasıyla; W=0,0107xTL 2,8789 (R 2 =0,9121), W=0,8418xCL 2,1023 (R 2 =0,8863), KF 3 =1,012±0.24 ve KF b =1,474±0,64 olarak hesaplanmıştır.
Bu çalışmada rekreaktif amaçlı kullanılan Sarısu Göleti'nin mevcut besin düzeyinin belirlenmesi a... more Bu çalışmada rekreaktif amaçlı kullanılan Sarısu Göleti'nin mevcut besin düzeyinin belirlenmesi amacı ile bazı su kalite parametreleri, klorofil a, fitoplankton kompozisyonu ve sayısı ile zooplankton bolluğu altı ay boyunca incelenmiştir. Su kalite parametrelerine göre gölün besin düzeyi mezoötrofik-ötrofik olarak belirlenmiştir. Söz konusu parametreler Türk Çevre Mevzuatı'na göre tartışılmıştır. Araştırma süresince Bacillariophyceae, Chlorophyceae, Chrysophyceae, Cryptophyceae, Cyanophyceae ve Dinophyceae sınıflarından toplam 31 fitoplankton türü teşhis edilmiştir. Fitoplankton sayısı 495000 hücre/l ile 12808000 hücre/l, klorofil a derişimi ise 1,12 ile 13,2 mg/m 3 arasında değişmiştir. Gölette zooplankton kompozisyonu içinde Rotifera baskın olmuştur. Sonuçlar, gölette hızlı bir ötrofikasyonu işaret etmiştir ve bu nedenle besin maddesi artışı kontrol edilmelidir.
Özet : Bu çal ış mada, Ankara Çay ı 'ndan so ğ utma suyu sa ğ layan Kombine Çevrim Enerji Santral... more Özet : Bu çal ış mada, Ankara Çay ı 'ndan so ğ utma suyu sa ğ layan Kombine Çevrim Enerji Santrali'nin Ankara Çay ı üzerine olas ı etkilerini belirlenmek için su kalitesi (su s ıcakl ığı , çözünmü ş oksijen, pH, Secchi derinli ğ i, ask ı da kat ı madde, amonyak, nitrit, toplam fosfat, BOls, KOI, bulan ı kl ı k, demir, ya ğ ve gres), fitoplankton, zooplankton ve bentik fauna incelenmi ştir. Bu amaçla santral çevresinde Ankara Çay ı üzerinde 6 örnekleme noktas ı belirlenmi ştir. Santral deşarj ı öncesi (1., 2., 3. noktalar) ve sonras ı (5. ve 6. nokta) tüm noktalar 4. s ı n ıf (çok kirli sular) su kalitesindedir. Santral de şarj suyunun kalite parametreleri Türk Çevre Mevzuat] ve Su Ürünleri Yönetmeli ğ ine göre tart ışı lm ıştı r. Ayrıca teş his edilen fitoplankton, zooplankton ve bentik organizmalar genelde kirlili ğe toleransl ı organizmalard ı r. Sonuçlar santral çevresinde Ankara Çay ı n ı n bal ı kçı l ığa uygun olmad ığı n ı göstermektedir.
The relationships between chlorophyll a and some physical and chemical properties of water were i... more The relationships between chlorophyll a and some physical and chemical properties of water were investigated by using multiple linear and nonlinear regression models in Kurtbo ğ az ı and Çaml ı dere reservoirs With these two different approaches chlorophyll a was aimed to be estimate more accurately. The determination coefficients were found as 95% and 82% for multiple linear regression models while 85`)/0 and 7 O % for nonlinear regression models for Kurtbo ğ az ı and Çaml ı dere reservoirs, respectively.
Özet : Kafeslerde çipura ve levrek bal ığı yetiştiriciliğinin fitoplanktona etkisinin belirlenmes... more Özet : Kafeslerde çipura ve levrek bal ığı yetiştiriciliğinin fitoplanktona etkisinin belirlenmesi amac ıyla kafesler civar ı nda ve aç ı kta (kontrol) iki istasyon seçilmi ştir. Fitoplankton say ı s ı , kafes istasyonunda aç ı kta seçilen istasyondan yüksek bulunmuştur (p<0,01). Kafes istasyonunun ldorofı l a değerleri de aç ı kta seçilen istasyondakinden yüksektir. Pennat diatomlar, Rhizosolenta spp., Thalassionema nitzschioldes ve Leptocylindricus danicus türleriyle dominant olarak bulunmuşlard ır. Fitoplankton kompozisyonu aç ıs ı ndan kafes istasyonu ve aç ıkta seçilen istasyon aras ı nda bariz bir farkl ı lı k görülmemiştir.
Abstract The phytoplankton composition of coastal, hyposaline (≅12 gl −1) Lake Bafa in western Tu... more Abstract The phytoplankton composition of coastal, hyposaline (≅12 gl −1) Lake Bafa in western Turkey, was investigated after the alteration of salinity levels in past decades. Lake Bafa, formerly a bay of the Aegean Sea, was separated from the sea as a result of alluvium deposits of ...
and/or bioindicators are used for the monitoring and evaluation of the status of water bodies. Wa... more and/or bioindicators are used for the monitoring and evaluation of the status of water bodies. Water Framework Directive was adopted in 2000 by the European Union. It aims the sustainable use of surface and groundwaters. Phytoplankton, phytobenthos, macrophytes, macroinvertebrates and fish were identified as ecological quality indicators in the implementation of Water Framework Directive in lakes. In this study, the use of phyoplankton functional groups and communities in the assessment of the ecological state of lakes were examined. Furthermore, some literatures in Turkish and European lakes on phytoplankton communities were summarized.
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