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John P Giesy - One of the best experts on this subject based on the ideXlab platform.

  • risk assessment of great horned owls bubo virginianus exposed to polychlorinated biphenyls and ddt along the kalamazoo river michigan usa
    Environmental Toxicology and Chemistry, 2007
    Co-Authors: Karl D Strause, Matthew J Zwiernik, Patrick W Bradley, Pamela P Moseley, Denise P Kay, Cyrus S Park, Paul D Jones, Alan L Blankenship, John L Newsted, John P Giesy
    Abstract:

    The great horned owl (GHO; Bubo virginianus) was used in a multiple lines of evidence study of polychlorinated biphenyls (PCBs) and p,p'-dichlorodiphenyltrichloroethane (DDT) exposures at the Kalamazoo River Superfund Site (KRSS), Kalamazoo, Michigan, USA. The study examined risks from total PCBs, including 2,3,7,8-tetrachlorodibenzo-p-dioxin equivalents (TEQWorld Health Organization [WHO]-Avian Toxicity Equivalency Factor [TEF]), and total DDTs (sum of DDT, dichlorodiphenyldichloroethylene [DDE], and dichlorodiphenyldichloroethane [DDD]; sigmaDDT) by measuring concentrations in Eggs and nestling blood plasma in two regions of the KRSS (upper, lower) and an upstream reference area (RA). An ecological risk assessment compared concentrations of the contaminants of concern (COCs) in Eggs or plasma to toxicity reference values. Productivity and relative abundance measures for KRSS GHOs were compared with other GHO populations. Egg Shell Thickness was measured to assess effects of p,p'-DDE. The concentrations of PCBs in Eggs were as great as 4.7 x 10(2) and 4.0 x 10(4) ng PCB/g, wet weight at the RA and combined KRSS sites, respectively. Egg TEQ(WHO-Avian) calculated from aryl hydrocarbon receptor-active PCB congeners and WHO TEFs ranged to 8.0 and 1.9 x 10(2) pg TEQ(WHO-Avian)/g, (wet wt) at the RA and combined KRSS, respectively. Egg sigmaDDT concentrations were as great as 4.2 x 10(2) and 5.0 x 10(3) ng sigmaDDT/g (wet wt) at the RA and combined KRSS, respectively. Hazard quotients (HQs) for the upper 95% confidence interval (UCI) (geometric mean) and least observable adverse effect concentration (LOAEC) for COCs in Eggs were < or = 1.0 for all sites. Hazard quotient values based on the no observable adverse effect concentration (NOAEC) 95% UCI in Eggs were < or = 1.0, except at the LKRSS (PCB HQ = 3.1; TEQ(WHO-Avian) HQ = 1.3). Productivity and relative abundance measures indicated no population level effects in the UKRSS.

Karl D Strause - One of the best experts on this subject based on the ideXlab platform.

  • risk assessment of great horned owls bubo virginianus exposed to polychlorinated biphenyls and ddt along the kalamazoo river michigan usa
    Environmental Toxicology and Chemistry, 2007
    Co-Authors: Karl D Strause, Matthew J Zwiernik, Patrick W Bradley, Pamela P Moseley, Denise P Kay, Cyrus S Park, Paul D Jones, Alan L Blankenship, John L Newsted, John P Giesy
    Abstract:

    The great horned owl (GHO; Bubo virginianus) was used in a multiple lines of evidence study of polychlorinated biphenyls (PCBs) and p,p'-dichlorodiphenyltrichloroethane (DDT) exposures at the Kalamazoo River Superfund Site (KRSS), Kalamazoo, Michigan, USA. The study examined risks from total PCBs, including 2,3,7,8-tetrachlorodibenzo-p-dioxin equivalents (TEQWorld Health Organization [WHO]-Avian Toxicity Equivalency Factor [TEF]), and total DDTs (sum of DDT, dichlorodiphenyldichloroethylene [DDE], and dichlorodiphenyldichloroethane [DDD]; sigmaDDT) by measuring concentrations in Eggs and nestling blood plasma in two regions of the KRSS (upper, lower) and an upstream reference area (RA). An ecological risk assessment compared concentrations of the contaminants of concern (COCs) in Eggs or plasma to toxicity reference values. Productivity and relative abundance measures for KRSS GHOs were compared with other GHO populations. Egg Shell Thickness was measured to assess effects of p,p'-DDE. The concentrations of PCBs in Eggs were as great as 4.7 x 10(2) and 4.0 x 10(4) ng PCB/g, wet weight at the RA and combined KRSS sites, respectively. Egg TEQ(WHO-Avian) calculated from aryl hydrocarbon receptor-active PCB congeners and WHO TEFs ranged to 8.0 and 1.9 x 10(2) pg TEQ(WHO-Avian)/g, (wet wt) at the RA and combined KRSS, respectively. Egg sigmaDDT concentrations were as great as 4.2 x 10(2) and 5.0 x 10(3) ng sigmaDDT/g (wet wt) at the RA and combined KRSS, respectively. Hazard quotients (HQs) for the upper 95% confidence interval (UCI) (geometric mean) and least observable adverse effect concentration (LOAEC) for COCs in Eggs were < or = 1.0 for all sites. Hazard quotient values based on the no observable adverse effect concentration (NOAEC) 95% UCI in Eggs were < or = 1.0, except at the LKRSS (PCB HQ = 3.1; TEQ(WHO-Avian) HQ = 1.3). Productivity and relative abundance measures indicated no population level effects in the UKRSS.

  • Environmental Toxicology RISK ASSESSMENT OF GREAT HORNED OWLS (BUBO VIRGINIANUS) EXPOSED TO POLYCHLORINATED BIPHENYLS AND DDT ALONG THE KALAMAZOO RIVER, MICHIGAN, USA
    2007
    Co-Authors: Karl D Strause, Matthew J Zwiernik, Patrick W Bradley, Pamela P Moseley, Denise P Kay, Cyrus S Park, Paul D Jones, † Sook, Alan L Blankenship
    Abstract:

    Abstract-The great horned owl (GHO; Bubo virginianus) was used in a multiple lines of evidence study of polychlorinated biphenyls (PCBs) and p,pЈ-dichlorodiphenyltrichloroethane (DDT) exposures at the Kalamazoo River Superfund Site (KRSS), Kalamazoo, Michigan, USA. The study examined risks from total PCBs, including 2,3,7,8-tetrachlorodibenzo-p-dioxin equivalents (TEQ World Health Organization [WHO]-Avian Toxicity Equivalency Factor [TEF] ), and total DDTs (sum of DDT, dichlorodiphenyldichloroethylene [DDE], and dichlorodiphenyldichloroethane [DDD]; ⌺DDT) by measuring concentrations in Eggs and nestling blood plasma in two regions of the KRSS (upper, lower) and an upstream reference area (RA). An ecological risk assessment compared concentrations of the contaminants of concern (COCs) in Eggs or plasma to toxicity reference values. Productivity and relative abundance measures for KRSS GHOs were compared with other GHO populations. Egg Shell Thickness was measured to assess effects of p,pЈ-DDE. The concentrations of PCBs in Eggs were as great as 4.7 ϫ 10 2 and 4.0 ϫ 10 4 ng PCB/g, wet weight at the RA and combined KRSS sites, respectively. Egg TEQ WHO-Avian calculated from aryl hydrocarbon receptor-active PCB congeners and WHO TEFs ranged to 8.0 and 1.9 ϫ 10 2 pg TEQ WHO-Avian /g, (wet wt) at the RA and combined KRSS, respectively. Egg ⌺DDT concentrations were as great as 4.2 ϫ 10 2 and 5.0 ϫ 10 3 ng ⌺DDT/g (wet wt) at the RA and combined KRSS, respectively. Hazard quotients (HQs) for the upper 95% confidence interval (UCI) (geometric mean) and least observable adverse effect concentration (LOAEC) for COCs in Eggs were Յ1.0 for all sites. Hazard quotient values based on the no observable adverse effect concentration (NOAEC) 95% UCI in Eggs were Յ1.0, except at the LKRSS (PCB HQ ϭ 3.1; TEQ WHO-Avian HQ ϭ 1.3). Productivity and relative abundance measures indicated no population level effects in the UKRSS

Hidalgo Bravo, Gustavo Adolfo - One of the best experts on this subject based on the ideXlab platform.

  • Efecto de diferentes niveles de suministro de carbonato de calcio sobre el peso y grosor de la cascara del huevo
    'Universidad de Sucre', 2019
    Co-Authors: Vera Rodríguez, José Humberto, Hidalgo Bravo, Gustavo Adolfo
    Abstract:

    The objective was to evaluate the effect of calcium carbonate supply levels 0.00; 0.50; 1.00; 1.50 g/bird/day, with a granulometry between 2 to 4 mm, when added in the late afternoon, about the weight of the Egg and the Thickness of the Shell in laying hens from 22 to 30 weeks of age. 200 layers of the Hy-Line Brown genetic line were used, which were distributed in 4 treatments, 10 repetitions, during 9 weeks. The Egg weight and Shell Thickness were evaluated weekly, using a completely randomized block design. The results did not show differences in the weight of the Egg, while for the Thickness of the Shell significant statistical differences were found p <0.05. In conclusion, it was demonstrated that the addition of 1.50 g/ bird / day of calcium carbonate in the late afternoon with a granulometry of 2 to 4 mm, improved the Thickness of the EggShell during the weeks of evaluation, It is also stated that the Egg Shell Thickness can be estimated through the weight of the Egg by performing the following regression model (Shell Thickness = 0.3533 x ln (Egg weight) - 1.001).El objetivo fue evaluar el efecto de los niveles de suministro del carbonato de calcio 0.00; 0.50; 1.00; 1.50 g/ave/día, con una granulometría entre 2 a 4 mm, al adicionarlos en las últimas horas de la tarde, sobre el peso del huevo y el grosor del cascarón en gallinas ponedoras de 22 a 30 semanas de edad. Se utilizaron 200 ponedoras de la línea genética Hy-Line Brown, las cuales fueron distribuidas en 4 tratamientos, 10 repeticiones, durante 9 semanas. Se evalúo semanalmente el peso del huevo y el espesor del cascarón, utilizando un diseño de bloques completamente al azar. Los resultados no registraron diferencias en cuanto al peso del huevo, mientras que para el grosor del cascarón se encontraron diferencias estadísticas significativas p<0.05. En conclusión, se demostró que la adición de 1.50 g/ave/día de carbonato de calcio en las últimas horas de la tarde con una granulometría de 2 a 4 mm, mejoró el grosor del cascarón del huevo durante las semanas de evaluación, además se afirma que se puede estimar el grosor del cascarón del huevo a través del peso del huevo realizando el siguiente modelo de regresión (Grosor del cascarón = 0.3533 x ln (Peso del huevo) - 1.001)

Zubaidah Zubaidah - One of the best experts on this subject based on the ideXlab platform.

  • Penggunaan Bungkil Inti Sawit dan Enzim Mannanase dalam Ransum terhadap Performa Produksi Telur Puyuh (Coturnix coturnix japonica)
    'Pusat Unggulan Riset-Penggembangan Lahan Suboptimal (PUR-PLSO)', 2019
    Co-Authors: Noferdiman Noferdiman, Sestilawarti Sestilawarti, Zubaidah Zubaidah
    Abstract:

    Noferdiman et al, 2019. The use of palm kernel meal and mannanase enzyme in diets on the production performance of quails (Coturnix coturnix japonica) . JLSO 8(1):11-19.The objective of the study was to investigate the effect of the levels of palm kernel meal and mannanase enzyme in diets to get the best performance of quails. It was used the 180 female quails in treatment combination using the completely randomized design in factorial arrangement of 2 x 3 with 3 replications. Each unit study consisted of  10 quails. The treatment consisted of 2 levels of mannanase enzyme, i.e. 0.00, 0.10 % and 3 levels of palm kernel meal additions, i.e. 0, 10 and 20 %. The results of the study showed that the use of mannanase enzyme and palm kernel meal and their interaction were no significant (P>0.05) affected feed consumption, Eggs production, feed conversion, Egg weight, Egg Shell Thickness, and haugh unit (HU). The use of mannanase enzyme highly significant (P

  • Penggunaan Bungkil Inti Sawit dan Enzim Mannanase dalam Ransum terhadap Performa Produksi Telur Puyuh (Coturnix coturnix japonica)
    'Pusat Unggulan Riset-Penggembangan Lahan Suboptimal (PUR-PLSO)', 2019
    Co-Authors: Noferdiman Noferdiman, Sestilawarti Sestilawarti, Zubaidah Zubaidah
    Abstract:

    Noferdiman et al, 2019. The use of palm kernel meal and mannanase enzyme in diets on the production performance of quails (Coturnix coturnix japonica) . JLSO 8(1):11-19.The objective of the study was to investigate the effect of the levels of palm kernel meal and mannanase enzyme in diets to get the best performance of quails. It was used the 180 female quails in treatment combination using the completely randomized design in factorial arrangement of 2 x 3 with 3 replications. Each unit study consisted of  10 quails. The treatment consisted of 2 levels of mannanase enzyme, i.e. 0.00, 0.10 % and 3 levels of palm kernel meal additions, i.e. 0, 10 and 20 %. The results of the study showed that the use of mannanase enzyme and palm kernel meal and their interaction were no significant (P>0.05) affected feed consumption, Eggs production, feed conversion, Egg weight, Egg Shell Thickness, and haugh unit (HU). The use of mannanase enzyme highly significant (P<0.01) affected on Eggs production and feed conversion however there were no interaction between the treatments. It was concluded that the addition of 0.10 % of mannanase enzyme in diets consisting 20% palm kernel meal can improve the performance Egg production of quails

Alan L Blankenship - One of the best experts on this subject based on the ideXlab platform.

  • risk assessment of great horned owls bubo virginianus exposed to polychlorinated biphenyls and ddt along the kalamazoo river michigan usa
    Environmental Toxicology and Chemistry, 2007
    Co-Authors: Karl D Strause, Matthew J Zwiernik, Patrick W Bradley, Pamela P Moseley, Denise P Kay, Cyrus S Park, Paul D Jones, Alan L Blankenship, John L Newsted, John P Giesy
    Abstract:

    The great horned owl (GHO; Bubo virginianus) was used in a multiple lines of evidence study of polychlorinated biphenyls (PCBs) and p,p'-dichlorodiphenyltrichloroethane (DDT) exposures at the Kalamazoo River Superfund Site (KRSS), Kalamazoo, Michigan, USA. The study examined risks from total PCBs, including 2,3,7,8-tetrachlorodibenzo-p-dioxin equivalents (TEQWorld Health Organization [WHO]-Avian Toxicity Equivalency Factor [TEF]), and total DDTs (sum of DDT, dichlorodiphenyldichloroethylene [DDE], and dichlorodiphenyldichloroethane [DDD]; sigmaDDT) by measuring concentrations in Eggs and nestling blood plasma in two regions of the KRSS (upper, lower) and an upstream reference area (RA). An ecological risk assessment compared concentrations of the contaminants of concern (COCs) in Eggs or plasma to toxicity reference values. Productivity and relative abundance measures for KRSS GHOs were compared with other GHO populations. Egg Shell Thickness was measured to assess effects of p,p'-DDE. The concentrations of PCBs in Eggs were as great as 4.7 x 10(2) and 4.0 x 10(4) ng PCB/g, wet weight at the RA and combined KRSS sites, respectively. Egg TEQ(WHO-Avian) calculated from aryl hydrocarbon receptor-active PCB congeners and WHO TEFs ranged to 8.0 and 1.9 x 10(2) pg TEQ(WHO-Avian)/g, (wet wt) at the RA and combined KRSS, respectively. Egg sigmaDDT concentrations were as great as 4.2 x 10(2) and 5.0 x 10(3) ng sigmaDDT/g (wet wt) at the RA and combined KRSS, respectively. Hazard quotients (HQs) for the upper 95% confidence interval (UCI) (geometric mean) and least observable adverse effect concentration (LOAEC) for COCs in Eggs were < or = 1.0 for all sites. Hazard quotient values based on the no observable adverse effect concentration (NOAEC) 95% UCI in Eggs were < or = 1.0, except at the LKRSS (PCB HQ = 3.1; TEQ(WHO-Avian) HQ = 1.3). Productivity and relative abundance measures indicated no population level effects in the UKRSS.

  • Environmental Toxicology RISK ASSESSMENT OF GREAT HORNED OWLS (BUBO VIRGINIANUS) EXPOSED TO POLYCHLORINATED BIPHENYLS AND DDT ALONG THE KALAMAZOO RIVER, MICHIGAN, USA
    2007
    Co-Authors: Karl D Strause, Matthew J Zwiernik, Patrick W Bradley, Pamela P Moseley, Denise P Kay, Cyrus S Park, Paul D Jones, † Sook, Alan L Blankenship
    Abstract:

    Abstract-The great horned owl (GHO; Bubo virginianus) was used in a multiple lines of evidence study of polychlorinated biphenyls (PCBs) and p,pЈ-dichlorodiphenyltrichloroethane (DDT) exposures at the Kalamazoo River Superfund Site (KRSS), Kalamazoo, Michigan, USA. The study examined risks from total PCBs, including 2,3,7,8-tetrachlorodibenzo-p-dioxin equivalents (TEQ World Health Organization [WHO]-Avian Toxicity Equivalency Factor [TEF] ), and total DDTs (sum of DDT, dichlorodiphenyldichloroethylene [DDE], and dichlorodiphenyldichloroethane [DDD]; ⌺DDT) by measuring concentrations in Eggs and nestling blood plasma in two regions of the KRSS (upper, lower) and an upstream reference area (RA). An ecological risk assessment compared concentrations of the contaminants of concern (COCs) in Eggs or plasma to toxicity reference values. Productivity and relative abundance measures for KRSS GHOs were compared with other GHO populations. Egg Shell Thickness was measured to assess effects of p,pЈ-DDE. The concentrations of PCBs in Eggs were as great as 4.7 ϫ 10 2 and 4.0 ϫ 10 4 ng PCB/g, wet weight at the RA and combined KRSS sites, respectively. Egg TEQ WHO-Avian calculated from aryl hydrocarbon receptor-active PCB congeners and WHO TEFs ranged to 8.0 and 1.9 ϫ 10 2 pg TEQ WHO-Avian /g, (wet wt) at the RA and combined KRSS, respectively. Egg ⌺DDT concentrations were as great as 4.2 ϫ 10 2 and 5.0 ϫ 10 3 ng ⌺DDT/g (wet wt) at the RA and combined KRSS, respectively. Hazard quotients (HQs) for the upper 95% confidence interval (UCI) (geometric mean) and least observable adverse effect concentration (LOAEC) for COCs in Eggs were Յ1.0 for all sites. Hazard quotient values based on the no observable adverse effect concentration (NOAEC) 95% UCI in Eggs were Յ1.0, except at the LKRSS (PCB HQ ϭ 3.1; TEQ WHO-Avian HQ ϭ 1.3). Productivity and relative abundance measures indicated no population level effects in the UKRSS