Yasemin Saygı - Academia.edu (original) (raw)

Papers by Yasemin Saygı

Research paper thumbnail of Ecological surveys on the parthenogenetic Artemia populations in the hypersaline lakes of Anatolia, Turkey

TURKISH JOURNAL OF ZOOLOGY, 2019

The objective of this study is to provide information on the parthenogenetic Artemia populations ... more The objective of this study is to provide information on the parthenogenetic Artemia populations in some hypersaline lakes of Anatolia (Tuz, Bolluk, Tersakan, and Acıgöl). Sampling studies were performed for abiotic factors and population parameters between November 2009 and October 2010. During the survey we focused on the local Artemia populations to investigate population dynamics, reproduction, brood size, and cyst and naupliar biometrics. Generally, the Artemia habitats in Anatolia were relatively shallow, and thus they were subject to major seasonal fluctuations. Dramatic declines in population size in Tuz and Acıgöl Lakes were found during this study. All Artemia populations were parthenogenetic and brood sizes of females showed significant differences among the populations (P < 0.05). The largest brood size was observed in the Acıgöl population and it may be concluded that local conditions for reproductive success were more adequate in this population. Substantial differences among populations were revealed during the studies on cyst and naupliar biometry. Cyst diameter mean values ranged from 231.8 to 266.9 µm. The cyst diameters for the Acıgöl population are determined as the smallest in these populations and among the smallest values recorded in parthenogenetic populations. The total length of newly hatched nauplii ranged from 484 to 512 µm for these populations.

Research paper thumbnail of Primary Production in Shallow Eutrophic Yeniçağa Lake (Bolu, Turkey)

SUMMARY -1 ), coinciding with the period of the greatest phytoplankton bloom. The lowest primary ... more SUMMARY -1 ), coinciding with the period of the greatest phytoplankton bloom. The lowest primary production occurred in 2 m depth in April 1999 (0.91 mg C m -3 h -1 ). The daily primary production ranged between 60 and 6202 mg C m -2 day -1 .

Research paper thumbnail of Rotifera Community Structure of Yeni�aga Lake, Turkey

Research paper thumbnail of Temporal Changes in Water Quality and Trophic Status in Lake Yeniçağa (Bolu, Turkey)

Fresenius Environmental Bulletin, 2012

Research paper thumbnail of Seasonal patterns of the zooplankton community in the shallow, brackish Liman Lake in Kizilirmak Delta, Turkey

Turkish Journal of Zoology

The present study reports on the zooplankton community in Liman Lake based on field studies carri... more The present study reports on the zooplankton community in Liman Lake based on field studies carried out between October 2002 and March 2004. A total of 35 zooplankton taxa, belonging to Rotifera (28), Cladocera (5), and Copepoda (2), were identified. Rotifera was the dominant group in all sampling surveys and accounted for 97% of the zooplankton density in the lake. The average total zooplankton abundance ranged from 993 to 476,912 ind/m3. The maximum and the minimum densities were measured in April and August of 2003, respectively. Seasonal Quantitative contributions of Cladocera and Copepoda to the zooplankton community were insignificant. Keratella During the study period, only rotifer species were found to be quantitatively dominant in the zooplankton community. quadrata, Keratella cochlearis, and Hexarthra oxyuris were the dominant species and were present during the whole year. fluctuations of zooplankton found in the current study disagreed with the Plankton Ecology Group (PE...

Research paper thumbnail of Pre-investigation of some heavy metal accumulation in the water, sediment and crayfish (Astacus leptodactylus) in Yenicaga Lake (Bolu-Turkey) | Yeniçaǧa Gölü'nde (Bolu-TÜRKİYE) su, sediment ve kerevitteki (Astacus leptodactylus) bazi{dotless} aǧi{dotless}r metallerin birikimi üzerine bir ön çali{...

Research paper thumbnail of Rotifera Community Structure of Yeniçağa Lake, Turkey

Journal of Freshwater Ecology, 2005

We analyze the spatial determinants of entrepreneurship in India in the manufacturing and service... more We analyze the spatial determinants of entrepreneurship in India in the manufacturing and services sectors. Among general district traits, quality of physical infrastructure and workforce education are the strongest predictors of entry, with labor laws and household banking access also playing important roles. We also find extensive evidence of agglomeration economies among manufacturing industries. In particular, supportive incumbent industrial structures for input and output markets are strongly linked to higher establishment entry rates. In comparison to the U.S., regional conditions in India play a stronger relative role for the spatial patterns of entrepreneurship compared to incumbent industry locations.

Research paper thumbnail of Limnological Assesment on the Brakish Shallow Liman Lake from Kizilirmak Delta (Turkey)

Journal of Animal and Veterinary Advances, 2010

Research paper thumbnail of Characterization of Parthenogenetic Artemia Populations from Çamaltı (Izmir, Turkey) and Kalloni (Lesbos, Greece): Survival, Growth, Maturation, Biometrics, Fatty Acid Profiles and Hatching Characteristics

Hydrobiologia, 2004

Two parthenogenetic populations from Ç amalt (Izmir, Turkey) and Kalloni (Lesbos, Greece) were ev... more Two parthenogenetic populations from Ç amalt (Izmir, Turkey) and Kalloni (Lesbos, Greece) were evaluated for their tolerance and fitness at different salinities and temperatures under laboratory conditions aiming to compare salinity and temperature effects upon special characteristics of the two Artemia strains, such as survival, growth rate, age of maturity and morphometry. Furthermore, biometry, hatching characteristics and fatty acid profile of Ç amalt cysts were evaluated for potential use in aquaculture. This evaluation revealed that both populations showed significant differences in their response to different temperatures and salinity. Although significant differences occurred between Kalloni and Ç amalt in survival at 25 and 30°C, neither of the strains exhibited good performance at high temperature. The optimum salinity for the Ç amalt population was 80 g l)1 , while the Kalloni population appeared to perform well at 120 g l)1. The fatty acid composition of Ç amalt cysts was found to be of good quality for use in aquaculture, especially in feeding larvae of marine species.

Research paper thumbnail of Heavy metals in Yeniçağa Lake and its potential sources: soil, water, sediment, and plankton

Environmental Monitoring and Assessment, 2011

The distribution and accumulation of heavy metals (Al,

Research paper thumbnail of Assessment of Pesticide Residues in Karaboğaz Lake from Kızılırmak Delta, Turkey

Bulletin of Environmental Contamination and Toxicology, 2013

Monitoring of pesticide residues in water and sediments was conducted for the coastal shallow Kar... more Monitoring of pesticide residues in water and sediments was conducted for the coastal shallow Karaboğaz Lake, northern Turkey. During a one-year study period, eight pesticides (malathion, etofenprox, molinate, oxamyl, propamocarb hydrochloride, tebufenozide, linuron, piperonyl butoxide) were detected in water and in sediments, all at μg/L and μg/kg concentrations, respectively. Temporal variation in pesticide concentrations was observed. Highest pesticide concentrations in water and sediment were from tebufenozide and etofenprox, respectively. Aquatic risk assessments revealed that out of eight pesticides detected, three showed unaccaptable risk: malathion, oxamyl and etofenprox.

Research paper thumbnail of Effects Of Hydrogen Peroxide, Cold Storage And Descapsulation On The Hatching Success Of Artemia Cysts

Israeli Journal of Aquaculture - Bamidgeh, 2003

As from January 2010 The Israeli Journal of Aquaculture-Bamidgeh (IJA) will be published exclusiv... more As from January 2010 The Israeli Journal of Aquaculture-Bamidgeh (IJA) will be published exclusively as an on-line Open Access (OA) quarterly accessible by all AquacultureHub (http://www.aquaculturehub.org) members and registered individuals and institutions. Please visit our website (http://siamb.org.il) for free registration form, further information and instructions. This transformation from a subscription printed version to an on-line OA journal, aims at supporting the concept that scientific peer-reviewed publications should be made available to all, including those with limited resources. The OA IJA does not enforce author or subscription fees and will endeavor to obtain alternative sources of income to support this policy for as long as possible.

Research paper thumbnail of Assessment of Metal Concentrations in Two Cyprinid Fish Species (Leuciscus cephalus and Tinca tinca) Captured from Yeniçağa Lake, Turkey

Bulletin of Environmental Contamination and Toxicology, 2012

Research paper thumbnail of Heavy metals in Yeniçağa Lake and its potential sources: soil, water, sediment, and plankton

Environmental Monitoring and Assessment

The distribution and accumulation of heavy metals (Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Mo, Cd, Sn... more The distribution and accumulation of heavy metals (Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Mo, Cd, Sn, Ba, Pb) in the water, sediments, plankton of Yeniçağa Lake, and its potential sources (creeks, sewage, artesian well, soil) were investigated during 1-year study period as monthly or seasonally. Element analyses were performed by ICP–MS. Results showed that the trace and toxic elements (Al, As, Mn, Pb, Fe) concentration in lake water and/or its feeding sources were above the recommended water standards (WHO, EC, EPA, TS-266). It was found that the maximum accumulation of the heavy metals iron, aluminum, manganese, zinc, and barium in the sediment of Yeniçağa Lake. The accumulation order of trace metals were Fe > Al > Mn > Zn > Ba > Ni > Cr > As > Cu > Pb > Co > Mo > Sn > Cd in the lake, creeks sediment, and soil samples. The similar results suggest that the accumulation of heavy metals in the sediment is a natural process. Metals accumulated in the lake are naturally mixed from the soil. However, the presence of heavy metals in the analysis of artesian well water and sewage reveals that the transportation occurs also from the groundwater to the lake. The results obtained in plankton in Yeniçağa Lake showed that aluminum, iron, manganese, zinc, and barium were most accumulated elements in the plankton. The lower averages of lead prevalent in the water and sediment during some months were seen to have a significant mean accumulation in the plankton.

Research paper thumbnail of Heavy metals in Yeniçağa Lake and its potential sources: soil, water, sediment, and plankton

Environmental Monitoring and Assessment

The distribution and accumulation of heavy metals (Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Mo, Cd, Sn... more The distribution and accumulation of heavy metals (Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Mo, Cd, Sn, Ba, Pb) in the water, sediments, plankton of Yeniçağa Lake, and its potential sources (creeks, sewage, artesian well, soil) were investigated during 1-year study period as monthly or seasonally. Element analyses were performed by ICP–MS. Results showed that the trace and toxic elements (Al, As, Mn, Pb, Fe) concentration in lake water and/or its feeding sources were above the recommended water standards (WHO, EC, EPA, TS-266). It was found that the maximum accumulation of the heavy metals iron, aluminum, manganese, zinc, and barium in the sediment of Yeniçağa Lake. The accumulation order of trace metals were Fe > Al > Mn > Zn > Ba > Ni > Cr > As > Cu > Pb > Co > Mo > Sn > Cd in the lake, creeks sediment, and soil samples. The similar results suggest that the accumulation of heavy metals in the sediment is a natural process. Metals accumulated in the lake are naturally mixed from the soil. However, the presence of heavy metals in the analysis of artesian well water and sewage reveals that the transportation occurs also from the groundwater to the lake. The results obtained in plankton in Yeniçağa Lake showed that aluminum, iron, manganese, zinc, and barium were most accumulated elements in the plankton. The lower averages of lead prevalent in the water and sediment during some months were seen to have a significant mean accumulation in the plankton.

Research paper thumbnail of Heavy metals in Yeniçağa Lake and its potential sources: soil, water, sediment, and plankton

Environmental Monitoring and Assessment

The distribution and accumulation of heavy metals (Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Mo, Cd, Sn... more The distribution and accumulation of heavy metals (Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Mo, Cd, Sn, Ba, Pb) in the water, sediments, plankton of Yeniçağa Lake, and its potential sources (creeks, sewage, artesian well, soil) were investigated during 1-year study period as monthly or seasonally. Element analyses were performed by ICP–MS. Results showed that the trace and toxic elements (Al, As, Mn, Pb, Fe) concentration in lake water and/or its feeding sources were above the recommended water standards (WHO, EC, EPA, TS-266). It was found that the maximum accumulation of the heavy metals iron, aluminum, manganese, zinc, and barium in the sediment of Yeniçağa Lake. The accumulation order of trace metals were Fe > Al > Mn > Zn > Ba > Ni > Cr > As > Cu > Pb > Co > Mo > Sn > Cd in the lake, creeks sediment, and soil samples. The similar results suggest that the accumulation of heavy metals in the sediment is a natural process. Metals accumulated in the lake are naturally mixed from the soil. However, the presence of heavy metals in the analysis of artesian well water and sewage reveals that the transportation occurs also from the groundwater to the lake. The results obtained in plankton in Yeniçağa Lake showed that aluminum, iron, manganese, zinc, and barium were most accumulated elements in the plankton. The lower averages of lead prevalent in the water and sediment during some months were seen to have a significant mean accumulation in the plankton.

Research paper thumbnail of Heavy metals in Yeniçağa Lake and its potential sources: soil, water, sediment, and plankton

Environmental Monitoring and Assessment

The distribution and accumulation of heavy metals (Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Mo, Cd, Sn... more The distribution and accumulation of heavy metals (Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Mo, Cd, Sn, Ba, Pb) in the water, sediments, plankton of Yeniçağa Lake, and its potential sources (creeks, sewage, artesian well, soil) were investigated during 1-year study period as monthly or seasonally. Element analyses were performed by ICP–MS. Results showed that the trace and toxic elements (Al, As, Mn, Pb, Fe) concentration in lake water and/or its feeding sources were above the recommended water standards (WHO, EC, EPA, TS-266). It was found that the maximum accumulation of the heavy metals iron, aluminum, manganese, zinc, and barium in the sediment of Yeniçağa Lake. The accumulation order of trace metals were Fe > Al > Mn > Zn > Ba > Ni > Cr > As > Cu > Pb > Co > Mo > Sn > Cd in the lake, creeks sediment, and soil samples. The similar results suggest that the accumulation of heavy metals in the sediment is a natural process. Metals accumulated in the lake are naturally mixed from the soil. However, the presence of heavy metals in the analysis of artesian well water and sewage reveals that the transportation occurs also from the groundwater to the lake. The results obtained in plankton in Yeniçağa Lake showed that aluminum, iron, manganese, zinc, and barium were most accumulated elements in the plankton. The lower averages of lead prevalent in the water and sediment during some months were seen to have a significant mean accumulation in the plankton.

Research paper thumbnail of Heavy metals in Yeniçağa Lake and its potential sources: soil, water, sediment, and plankton

Environmental Monitoring and Assessment

The distribution and accumulation of heavy metals (Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Mo, Cd, Sn... more The distribution and accumulation of heavy metals (Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Mo, Cd, Sn, Ba, Pb) in the water, sediments, plankton of Yeniçağa Lake, and its potential sources (creeks, sewage, artesian well, soil) were investigated during 1-year study period as monthly or seasonally. Element analyses were performed by ICP–MS. Results showed that the trace and toxic elements (Al, As, Mn, Pb, Fe) concentration in lake water and/or its feeding sources were above the recommended water standards (WHO, EC, EPA, TS-266). It was found that the maximum accumulation of the heavy metals iron, aluminum, manganese, zinc, and barium in the sediment of Yeniçağa Lake. The accumulation order of trace metals were Fe > Al > Mn > Zn > Ba > Ni > Cr > As > Cu > Pb > Co > Mo > Sn > Cd in the lake, creeks sediment, and soil samples. The similar results suggest that the accumulation of heavy metals in the sediment is a natural process. Metals accumulated in the lake are naturally mixed from the soil. However, the presence of heavy metals in the analysis of artesian well water and sewage reveals that the transportation occurs also from the groundwater to the lake. The results obtained in plankton in Yeniçağa Lake showed that aluminum, iron, manganese, zinc, and barium were most accumulated elements in the plankton. The lower averages of lead prevalent in the water and sediment during some months were seen to have a significant mean accumulation in the plankton.

Research paper thumbnail of Heavy metals in Yeniçağa Lake and its potential sources: soil, water, sediment, and plankton

Environmental Monitoring and Assessment

The distribution and accumulation of heavy metals (Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Mo, Cd, Sn... more The distribution and accumulation of heavy metals (Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Mo, Cd, Sn, Ba, Pb) in the water, sediments, plankton of Yeniçağa Lake, and its potential sources (creeks, sewage, artesian well, soil) were investigated during 1-year study period as monthly or seasonally. Element analyses were performed by ICP–MS. Results showed that the trace and toxic elements (Al, As, Mn, Pb, Fe) concentration in lake water and/or its feeding sources were above the recommended water standards (WHO, EC, EPA, TS-266). It was found that the maximum accumulation of the heavy metals iron, aluminum, manganese, zinc, and barium in the sediment of Yeniçağa Lake. The accumulation order of trace metals were Fe > Al > Mn > Zn > Ba > Ni > Cr > As > Cu > Pb > Co > Mo > Sn > Cd in the lake, creeks sediment, and soil samples. The similar results suggest that the accumulation of heavy metals in the sediment is a natural process. Metals accumulated in the lake are naturally mixed from the soil. However, the presence of heavy metals in the analysis of artesian well water and sewage reveals that the transportation occurs also from the groundwater to the lake. The results obtained in plankton in Yeniçağa Lake showed that aluminum, iron, manganese, zinc, and barium were most accumulated elements in the plankton. The lower averages of lead prevalent in the water and sediment during some months were seen to have a significant mean accumulation in the plankton.

Research paper thumbnail of Rotifera Community Structure of Yeniçağa Lake, Turkey

Journal of Freshwater Ecology, 2005

We characterized the Rotifera community in Yeniçağa Lake, Turkey between October 1997 and August ... more We characterized the Rotifera community in Yeniçağa Lake, Turkey between October 1997 and August 1999. Totally, twenty-two rotifer species were found, and their relative dominance showed significant seasonal variations. The most frequently occurring species were Keratella quadrata, Filinia longiseta, Brachionus urceolaris, and Asplanchna priodonta.

Research paper thumbnail of Ecological surveys on the parthenogenetic Artemia populations in the hypersaline lakes of Anatolia, Turkey

TURKISH JOURNAL OF ZOOLOGY, 2019

The objective of this study is to provide information on the parthenogenetic Artemia populations ... more The objective of this study is to provide information on the parthenogenetic Artemia populations in some hypersaline lakes of Anatolia (Tuz, Bolluk, Tersakan, and Acıgöl). Sampling studies were performed for abiotic factors and population parameters between November 2009 and October 2010. During the survey we focused on the local Artemia populations to investigate population dynamics, reproduction, brood size, and cyst and naupliar biometrics. Generally, the Artemia habitats in Anatolia were relatively shallow, and thus they were subject to major seasonal fluctuations. Dramatic declines in population size in Tuz and Acıgöl Lakes were found during this study. All Artemia populations were parthenogenetic and brood sizes of females showed significant differences among the populations (P < 0.05). The largest brood size was observed in the Acıgöl population and it may be concluded that local conditions for reproductive success were more adequate in this population. Substantial differences among populations were revealed during the studies on cyst and naupliar biometry. Cyst diameter mean values ranged from 231.8 to 266.9 µm. The cyst diameters for the Acıgöl population are determined as the smallest in these populations and among the smallest values recorded in parthenogenetic populations. The total length of newly hatched nauplii ranged from 484 to 512 µm for these populations.

Research paper thumbnail of Primary Production in Shallow Eutrophic Yeniçağa Lake (Bolu, Turkey)

SUMMARY -1 ), coinciding with the period of the greatest phytoplankton bloom. The lowest primary ... more SUMMARY -1 ), coinciding with the period of the greatest phytoplankton bloom. The lowest primary production occurred in 2 m depth in April 1999 (0.91 mg C m -3 h -1 ). The daily primary production ranged between 60 and 6202 mg C m -2 day -1 .

Research paper thumbnail of Rotifera Community Structure of Yeni�aga Lake, Turkey

Research paper thumbnail of Temporal Changes in Water Quality and Trophic Status in Lake Yeniçağa (Bolu, Turkey)

Fresenius Environmental Bulletin, 2012

Research paper thumbnail of Seasonal patterns of the zooplankton community in the shallow, brackish Liman Lake in Kizilirmak Delta, Turkey

Turkish Journal of Zoology

The present study reports on the zooplankton community in Liman Lake based on field studies carri... more The present study reports on the zooplankton community in Liman Lake based on field studies carried out between October 2002 and March 2004. A total of 35 zooplankton taxa, belonging to Rotifera (28), Cladocera (5), and Copepoda (2), were identified. Rotifera was the dominant group in all sampling surveys and accounted for 97% of the zooplankton density in the lake. The average total zooplankton abundance ranged from 993 to 476,912 ind/m3. The maximum and the minimum densities were measured in April and August of 2003, respectively. Seasonal Quantitative contributions of Cladocera and Copepoda to the zooplankton community were insignificant. Keratella During the study period, only rotifer species were found to be quantitatively dominant in the zooplankton community. quadrata, Keratella cochlearis, and Hexarthra oxyuris were the dominant species and were present during the whole year. fluctuations of zooplankton found in the current study disagreed with the Plankton Ecology Group (PE...

Research paper thumbnail of Pre-investigation of some heavy metal accumulation in the water, sediment and crayfish (Astacus leptodactylus) in Yenicaga Lake (Bolu-Turkey) | Yeniçaǧa Gölü'nde (Bolu-TÜRKİYE) su, sediment ve kerevitteki (Astacus leptodactylus) bazi{dotless} aǧi{dotless}r metallerin birikimi üzerine bir ön çali{...

Research paper thumbnail of Rotifera Community Structure of Yeniçağa Lake, Turkey

Journal of Freshwater Ecology, 2005

We analyze the spatial determinants of entrepreneurship in India in the manufacturing and service... more We analyze the spatial determinants of entrepreneurship in India in the manufacturing and services sectors. Among general district traits, quality of physical infrastructure and workforce education are the strongest predictors of entry, with labor laws and household banking access also playing important roles. We also find extensive evidence of agglomeration economies among manufacturing industries. In particular, supportive incumbent industrial structures for input and output markets are strongly linked to higher establishment entry rates. In comparison to the U.S., regional conditions in India play a stronger relative role for the spatial patterns of entrepreneurship compared to incumbent industry locations.

Research paper thumbnail of Limnological Assesment on the Brakish Shallow Liman Lake from Kizilirmak Delta (Turkey)

Journal of Animal and Veterinary Advances, 2010

Research paper thumbnail of Characterization of Parthenogenetic Artemia Populations from Çamaltı (Izmir, Turkey) and Kalloni (Lesbos, Greece): Survival, Growth, Maturation, Biometrics, Fatty Acid Profiles and Hatching Characteristics

Hydrobiologia, 2004

Two parthenogenetic populations from Ç amalt (Izmir, Turkey) and Kalloni (Lesbos, Greece) were ev... more Two parthenogenetic populations from Ç amalt (Izmir, Turkey) and Kalloni (Lesbos, Greece) were evaluated for their tolerance and fitness at different salinities and temperatures under laboratory conditions aiming to compare salinity and temperature effects upon special characteristics of the two Artemia strains, such as survival, growth rate, age of maturity and morphometry. Furthermore, biometry, hatching characteristics and fatty acid profile of Ç amalt cysts were evaluated for potential use in aquaculture. This evaluation revealed that both populations showed significant differences in their response to different temperatures and salinity. Although significant differences occurred between Kalloni and Ç amalt in survival at 25 and 30°C, neither of the strains exhibited good performance at high temperature. The optimum salinity for the Ç amalt population was 80 g l)1 , while the Kalloni population appeared to perform well at 120 g l)1. The fatty acid composition of Ç amalt cysts was found to be of good quality for use in aquaculture, especially in feeding larvae of marine species.

Research paper thumbnail of Heavy metals in Yeniçağa Lake and its potential sources: soil, water, sediment, and plankton

Environmental Monitoring and Assessment, 2011

The distribution and accumulation of heavy metals (Al,

Research paper thumbnail of Assessment of Pesticide Residues in Karaboğaz Lake from Kızılırmak Delta, Turkey

Bulletin of Environmental Contamination and Toxicology, 2013

Monitoring of pesticide residues in water and sediments was conducted for the coastal shallow Kar... more Monitoring of pesticide residues in water and sediments was conducted for the coastal shallow Karaboğaz Lake, northern Turkey. During a one-year study period, eight pesticides (malathion, etofenprox, molinate, oxamyl, propamocarb hydrochloride, tebufenozide, linuron, piperonyl butoxide) were detected in water and in sediments, all at μg/L and μg/kg concentrations, respectively. Temporal variation in pesticide concentrations was observed. Highest pesticide concentrations in water and sediment were from tebufenozide and etofenprox, respectively. Aquatic risk assessments revealed that out of eight pesticides detected, three showed unaccaptable risk: malathion, oxamyl and etofenprox.

Research paper thumbnail of Effects Of Hydrogen Peroxide, Cold Storage And Descapsulation On The Hatching Success Of Artemia Cysts

Israeli Journal of Aquaculture - Bamidgeh, 2003

As from January 2010 The Israeli Journal of Aquaculture-Bamidgeh (IJA) will be published exclusiv... more As from January 2010 The Israeli Journal of Aquaculture-Bamidgeh (IJA) will be published exclusively as an on-line Open Access (OA) quarterly accessible by all AquacultureHub (http://www.aquaculturehub.org) members and registered individuals and institutions. Please visit our website (http://siamb.org.il) for free registration form, further information and instructions. This transformation from a subscription printed version to an on-line OA journal, aims at supporting the concept that scientific peer-reviewed publications should be made available to all, including those with limited resources. The OA IJA does not enforce author or subscription fees and will endeavor to obtain alternative sources of income to support this policy for as long as possible.

Research paper thumbnail of Assessment of Metal Concentrations in Two Cyprinid Fish Species (Leuciscus cephalus and Tinca tinca) Captured from Yeniçağa Lake, Turkey

Bulletin of Environmental Contamination and Toxicology, 2012

Research paper thumbnail of Heavy metals in Yeniçağa Lake and its potential sources: soil, water, sediment, and plankton

Environmental Monitoring and Assessment

The distribution and accumulation of heavy metals (Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Mo, Cd, Sn... more The distribution and accumulation of heavy metals (Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Mo, Cd, Sn, Ba, Pb) in the water, sediments, plankton of Yeniçağa Lake, and its potential sources (creeks, sewage, artesian well, soil) were investigated during 1-year study period as monthly or seasonally. Element analyses were performed by ICP–MS. Results showed that the trace and toxic elements (Al, As, Mn, Pb, Fe) concentration in lake water and/or its feeding sources were above the recommended water standards (WHO, EC, EPA, TS-266). It was found that the maximum accumulation of the heavy metals iron, aluminum, manganese, zinc, and barium in the sediment of Yeniçağa Lake. The accumulation order of trace metals were Fe > Al > Mn > Zn > Ba > Ni > Cr > As > Cu > Pb > Co > Mo > Sn > Cd in the lake, creeks sediment, and soil samples. The similar results suggest that the accumulation of heavy metals in the sediment is a natural process. Metals accumulated in the lake are naturally mixed from the soil. However, the presence of heavy metals in the analysis of artesian well water and sewage reveals that the transportation occurs also from the groundwater to the lake. The results obtained in plankton in Yeniçağa Lake showed that aluminum, iron, manganese, zinc, and barium were most accumulated elements in the plankton. The lower averages of lead prevalent in the water and sediment during some months were seen to have a significant mean accumulation in the plankton.

Research paper thumbnail of Heavy metals in Yeniçağa Lake and its potential sources: soil, water, sediment, and plankton

Environmental Monitoring and Assessment

The distribution and accumulation of heavy metals (Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Mo, Cd, Sn... more The distribution and accumulation of heavy metals (Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Mo, Cd, Sn, Ba, Pb) in the water, sediments, plankton of Yeniçağa Lake, and its potential sources (creeks, sewage, artesian well, soil) were investigated during 1-year study period as monthly or seasonally. Element analyses were performed by ICP–MS. Results showed that the trace and toxic elements (Al, As, Mn, Pb, Fe) concentration in lake water and/or its feeding sources were above the recommended water standards (WHO, EC, EPA, TS-266). It was found that the maximum accumulation of the heavy metals iron, aluminum, manganese, zinc, and barium in the sediment of Yeniçağa Lake. The accumulation order of trace metals were Fe > Al > Mn > Zn > Ba > Ni > Cr > As > Cu > Pb > Co > Mo > Sn > Cd in the lake, creeks sediment, and soil samples. The similar results suggest that the accumulation of heavy metals in the sediment is a natural process. Metals accumulated in the lake are naturally mixed from the soil. However, the presence of heavy metals in the analysis of artesian well water and sewage reveals that the transportation occurs also from the groundwater to the lake. The results obtained in plankton in Yeniçağa Lake showed that aluminum, iron, manganese, zinc, and barium were most accumulated elements in the plankton. The lower averages of lead prevalent in the water and sediment during some months were seen to have a significant mean accumulation in the plankton.

Research paper thumbnail of Heavy metals in Yeniçağa Lake and its potential sources: soil, water, sediment, and plankton

Environmental Monitoring and Assessment

The distribution and accumulation of heavy metals (Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Mo, Cd, Sn... more The distribution and accumulation of heavy metals (Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Mo, Cd, Sn, Ba, Pb) in the water, sediments, plankton of Yeniçağa Lake, and its potential sources (creeks, sewage, artesian well, soil) were investigated during 1-year study period as monthly or seasonally. Element analyses were performed by ICP–MS. Results showed that the trace and toxic elements (Al, As, Mn, Pb, Fe) concentration in lake water and/or its feeding sources were above the recommended water standards (WHO, EC, EPA, TS-266). It was found that the maximum accumulation of the heavy metals iron, aluminum, manganese, zinc, and barium in the sediment of Yeniçağa Lake. The accumulation order of trace metals were Fe > Al > Mn > Zn > Ba > Ni > Cr > As > Cu > Pb > Co > Mo > Sn > Cd in the lake, creeks sediment, and soil samples. The similar results suggest that the accumulation of heavy metals in the sediment is a natural process. Metals accumulated in the lake are naturally mixed from the soil. However, the presence of heavy metals in the analysis of artesian well water and sewage reveals that the transportation occurs also from the groundwater to the lake. The results obtained in plankton in Yeniçağa Lake showed that aluminum, iron, manganese, zinc, and barium were most accumulated elements in the plankton. The lower averages of lead prevalent in the water and sediment during some months were seen to have a significant mean accumulation in the plankton.

Research paper thumbnail of Heavy metals in Yeniçağa Lake and its potential sources: soil, water, sediment, and plankton

Environmental Monitoring and Assessment

The distribution and accumulation of heavy metals (Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Mo, Cd, Sn... more The distribution and accumulation of heavy metals (Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Mo, Cd, Sn, Ba, Pb) in the water, sediments, plankton of Yeniçağa Lake, and its potential sources (creeks, sewage, artesian well, soil) were investigated during 1-year study period as monthly or seasonally. Element analyses were performed by ICP–MS. Results showed that the trace and toxic elements (Al, As, Mn, Pb, Fe) concentration in lake water and/or its feeding sources were above the recommended water standards (WHO, EC, EPA, TS-266). It was found that the maximum accumulation of the heavy metals iron, aluminum, manganese, zinc, and barium in the sediment of Yeniçağa Lake. The accumulation order of trace metals were Fe > Al > Mn > Zn > Ba > Ni > Cr > As > Cu > Pb > Co > Mo > Sn > Cd in the lake, creeks sediment, and soil samples. The similar results suggest that the accumulation of heavy metals in the sediment is a natural process. Metals accumulated in the lake are naturally mixed from the soil. However, the presence of heavy metals in the analysis of artesian well water and sewage reveals that the transportation occurs also from the groundwater to the lake. The results obtained in plankton in Yeniçağa Lake showed that aluminum, iron, manganese, zinc, and barium were most accumulated elements in the plankton. The lower averages of lead prevalent in the water and sediment during some months were seen to have a significant mean accumulation in the plankton.

Research paper thumbnail of Heavy metals in Yeniçağa Lake and its potential sources: soil, water, sediment, and plankton

Environmental Monitoring and Assessment

The distribution and accumulation of heavy metals (Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Mo, Cd, Sn... more The distribution and accumulation of heavy metals (Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Mo, Cd, Sn, Ba, Pb) in the water, sediments, plankton of Yeniçağa Lake, and its potential sources (creeks, sewage, artesian well, soil) were investigated during 1-year study period as monthly or seasonally. Element analyses were performed by ICP–MS. Results showed that the trace and toxic elements (Al, As, Mn, Pb, Fe) concentration in lake water and/or its feeding sources were above the recommended water standards (WHO, EC, EPA, TS-266). It was found that the maximum accumulation of the heavy metals iron, aluminum, manganese, zinc, and barium in the sediment of Yeniçağa Lake. The accumulation order of trace metals were Fe > Al > Mn > Zn > Ba > Ni > Cr > As > Cu > Pb > Co > Mo > Sn > Cd in the lake, creeks sediment, and soil samples. The similar results suggest that the accumulation of heavy metals in the sediment is a natural process. Metals accumulated in the lake are naturally mixed from the soil. However, the presence of heavy metals in the analysis of artesian well water and sewage reveals that the transportation occurs also from the groundwater to the lake. The results obtained in plankton in Yeniçağa Lake showed that aluminum, iron, manganese, zinc, and barium were most accumulated elements in the plankton. The lower averages of lead prevalent in the water and sediment during some months were seen to have a significant mean accumulation in the plankton.

Research paper thumbnail of Heavy metals in Yeniçağa Lake and its potential sources: soil, water, sediment, and plankton

Environmental Monitoring and Assessment

The distribution and accumulation of heavy metals (Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Mo, Cd, Sn... more The distribution and accumulation of heavy metals (Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Mo, Cd, Sn, Ba, Pb) in the water, sediments, plankton of Yeniçağa Lake, and its potential sources (creeks, sewage, artesian well, soil) were investigated during 1-year study period as monthly or seasonally. Element analyses were performed by ICP–MS. Results showed that the trace and toxic elements (Al, As, Mn, Pb, Fe) concentration in lake water and/or its feeding sources were above the recommended water standards (WHO, EC, EPA, TS-266). It was found that the maximum accumulation of the heavy metals iron, aluminum, manganese, zinc, and barium in the sediment of Yeniçağa Lake. The accumulation order of trace metals were Fe > Al > Mn > Zn > Ba > Ni > Cr > As > Cu > Pb > Co > Mo > Sn > Cd in the lake, creeks sediment, and soil samples. The similar results suggest that the accumulation of heavy metals in the sediment is a natural process. Metals accumulated in the lake are naturally mixed from the soil. However, the presence of heavy metals in the analysis of artesian well water and sewage reveals that the transportation occurs also from the groundwater to the lake. The results obtained in plankton in Yeniçağa Lake showed that aluminum, iron, manganese, zinc, and barium were most accumulated elements in the plankton. The lower averages of lead prevalent in the water and sediment during some months were seen to have a significant mean accumulation in the plankton.

Research paper thumbnail of Rotifera Community Structure of Yeniçağa Lake, Turkey

Journal of Freshwater Ecology, 2005

We characterized the Rotifera community in Yeniçağa Lake, Turkey between October 1997 and August ... more We characterized the Rotifera community in Yeniçağa Lake, Turkey between October 1997 and August 1999. Totally, twenty-two rotifer species were found, and their relative dominance showed significant seasonal variations. The most frequently occurring species were Keratella quadrata, Filinia longiseta, Brachionus urceolaris, and Asplanchna priodonta.