scholarly journals Depredación del borrego Ovis canadensis (Artiodactila: Bovidae) y el venado bura Odocoileus hemionus (Artiodactila: Cervidae) por Puma concolor (Carnivora: Felidae) en Coahuila, México

2018 ◽  
Vol 66 (4) ◽  
pp. 1496
Author(s):  
Hugo Sotelo-Gallardo ◽  
Juan Antonio García-Salas ◽  
Armando Jesús Contreras-Balderas
Keyword(s):  
Survival Rate ◽  
Puma Concolor ◽  
Mule Deer ◽  
Bighorn Sheep ◽  
Conservation Strategies ◽  
Isolated Populations ◽  
Mountain Lion ◽  
Significant Difference ◽  
The Impact ◽  
Predation Rates

Small and isolated populations of bighorn sheep (subject to special protection according to NOM-059-SEMARNAT-2010) are vulnerable to predation by mountain lion in habitat sympatric with mule deer. Understanding the specific causes of death and survival is important for the development of conservation strategies for bighorn sheep and other ungulates that share the same habitat, such as mule deer.We evaluated and compared the rate of predation by puma in 12 bighorn sheep (10 females, two males) and 10 adult females of mule deer with radio collars through measure risk program (micromorts). The impact of predation in both populations of herbivores is evaluated through the estimation of densities of sheep and mule deer. 88 % (8/9) deaths by puma in bighorn sheep with an average monthly survival rate of 0.79 and predation rates due to puma range from 0.17 to 0.30. In mule deer predation due to puma was 83 % (5/6) with an average monthly survival rate of 0.86 and predation rates due to puma range from 0.10 to 0.25, however when comparing the mountain lion depredation rate we found a significant difference between species (Z = 1.826, df = 6, P = 0.05). The density in mule deer was 9x more that bighorn. The bighorn sheep being the prey most selected and the one most affected as the population with the lowest density.

Impact of obesity upon the survival of cholangiocarcinoma patients.

2019 ◽  
Vol 37 (4_suppl) ◽  
pp. 288-288
Author(s):  
Phani Keerthi Surapaneni ◽  
Zhuo Li ◽  
Lalitha Padmanabha Vemireddy ◽  
Pashtoon Murtaza Kasi ◽  
Jason Scott Starr ◽  
...  
Keyword(s):  
Overall Survival ◽  
Survival Rate ◽  
Survival Rates ◽  
Tumor Location ◽  
Normal Weight ◽  
Categorical Variables ◽  
Overall Survival Rate ◽  
Exact Test ◽  
Significant Difference ◽  
The Impact

288 Background: Obesity is a risk factor for developing cholangiocarcinoma (CCA). However, the effect of obesity on survival of CCA is unclear. The primary aim of this study was to analyze the impact of obesity upon overall survival of CCA patients. Secondary aims were to analyze impact of obesity upon other disease characteristics such as tumor site, stage, age, sex, BMI and Ca 19-9. Methods: A total of 411 unique pts diagnosed with CCA at Mayo Clinic Florida between 2000 and 2018 were retrieved from our collective SDMS database. Variables evaluated included:demographics, Body Mass Index (BMI), AJCC stage, tumor location and Ca 19-9.A total of 185 pts had all data available pertaining to these variables. We further restricted the analysis to pts with intrahepatic CCA classified BMI as per CDC criteria normal (18.5-25kg/m2), overweight (25-29.9kg/m2) and obese (≥30 kg/m2), thus leaving a total of 152 pts. Continuous and categorical variables were compared across BMI groups using Chi-squared or Fisher’s exact test. Overall survival rates after diagnosis at 1, 2 and 3 years were estimated using Kaplan-Meier method. Results: Among 152 pts included in the study, 28% were normal weight, 40% were overweight and 32% were obese. The overall survival rate at 1, 2 and 3 years for normal weight pts with all stages combined was 54.1%, 35%, and 30.7%, respectively. The overall survival rate at 1, 2 and 3 years for overweight pts with all stages combined was 59.7 %, 32.6%, and 25.4%, respectively. The overall survival rate at 1, 2 and 3 years for obese pts with all stages combined was 63.9%, 37.6%, and 26.7%, respectively(p = 0.8766). Multivariate analysis demonstrated is no significant difference in overall survival for obese pts compared to normal or overweight pts.(Table to be shown) However it showed, gender and Ca19-9 were statistically significant predictors of overall survival, with males and pts with Ca19-9≥100 doing worse (HR1.65 (CI = 1.05, 2.61, p = 0.031) and HR 2.31 (CI = 1.49, 3.59, p = < 0.01), respectively). Conclusions: BMI did not make a significant impact on the overall survival, though there may be a trend toward worse OS for ptswith higher BMI. A larger, stage focused evaluation is warranted for further exploration of this trend.

Impact of puma predation on the decline and recovery of a mule deer population in southeastern Idaho

2006 ◽  
Vol 84 (11) ◽  
pp. 1555-1565 ◽  
Author(s):  
J.W. Laundré ◽  
L. Hernández ◽  
S.G. Clark
Keyword(s):  
Population Change ◽  
Puma Concolor ◽  
Mule Deer ◽  
Odocoileus Hemionus ◽  
Winter Mortality ◽  
Deer Population ◽  
Before And After ◽  
Proximate Factor ◽  
A Minor ◽  
The Impact

We modeled the impact of puma ( Puma concolor (L., 1771)) predation on the decline and recovery of mule deer ( Odocoileus hemionus (Rafinesque, 1817)) in southern Idaho based on estimates of puma numbers, predation rates of pumas, and reproductive variables of deer. Deer populations peaked in 1992–1993, then declined more than 55% and remained low for the next 11 years. Puma numbers peaked 4–6 years after deer populations peaked but then declined to original levels. Estimated puma predation on the deer population before and after the decline was 2.2%–3.3% and 3.1%–5.8%, respectively. At high puma densities (>3 pumas/100 km2), predation by pumas delayed deer recovery by 2–3 years. Percent winter mortality of fawns (r2 = 0.62, P < 0.001) and adult female deer (r2 = 0.68, P < 0.001) correlated positively with December–January snowfall. Incorporation of winter snowfall amounts in the model produced a pattern of deer population change matching estimated changes based on field survey data. We conclude that pumas probably were a minor factor in the decline of the deer population in our area and did not suppress deer recovery. We propose that winter snowfall was the primary ultimate and proximate factor in the deer decline and suppression of their recovery.

scholarly journals DETERMINANTS OF GROUNDWATER RETENTION IN WELLS: A CASE OF KEIYO NORTH DISTRICT, ELGEYO MARAKWET COUNTY, KENYA

2017 ◽  
Vol 3 (1) ◽  
Author(s):  
Andrew Rutto Kiptum ◽  
Catherine Chebet Sang
Keyword(s):  
Sampling Technique ◽  
Simple Random Sampling ◽  
Primary Data ◽  
Conservation Strategies ◽  
Retention Capacity ◽  
Random Factor ◽  
Biophysical Factors ◽  
Groundwater Supply ◽  
Significant Difference ◽  
The Impact

Continuous degradation of biophysical factors and over utilisation of available water through unsustainable consumptive means, tend to threaten the existence of groundwater supply. The aim of this study was to examine the influence of human activities and biophysical factors on groundwater retention in wells in Keiyo North District, Elgeyo Marakwet County, Kenya. Structured questionnaires were used to obtain primary data. Systematic simple random sampling technique was applied in the study. Excel and Statistical Package for Social Sciences (SPSS) were used for data analysis. The results of the study showed that biophysical factors had significant influence on groundwater level and/or retention capacity during dry season and no association during rainy season. Altitude and land use were insignificant in influencing groundwater retention during both dry and wet seasons. The logit model showed that nearness to the forest, swamp, river had high probability to influence groundwater retention in the wells. However, the random factor in the regression model showed significant difference in influencing groundwater retention, which explains more on the impact of other parameters that were beyond the scope of this study such as soil characteristics and climate on water retention capability. The findings of this study will inform policy and decision makers as they develop sustainable conservation strategies that will ensure continuous groundwater supply.

scholarly journals The Impact of Steatosis on the Outcome of Liver Transplantation: A Meta-Analysis

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Qiong-Yue Zhang ◽  
Qiong-Fang Zhang ◽  
Da-Zhi Zhang
Keyword(s):  
Liver Transplantation ◽  
Survival Rate ◽  
Meta Analysis ◽  
Cochrane Library ◽  
Graft Dysfunction ◽  
Outcome Indicators ◽  
Significant Difference ◽  
Early Graft ◽  
The Impact ◽  
Early Graft Dysfunction

Background and Aims. Liver transplantation is one of the most effective treatments for end-stage liver disease as well as for cases of acute liver failure. Facing organ donor shortage, liver transplant teams had to use marginal organs. Thus, increasing availability is a key concern of donor liver grafts including steatotic livers. However, the use of steatotic liver is still controversial. The aim of this systematic review and meta-analysis was to analyze the impact of steatosis on the outcome of liver transplantation. Methods. We searched PubMed, Cochrane Library, Embase, Web of knowledge, and so on for studies published through May 31, 2018, in which patients experienced liver transplantation using fatty liver. All studies extracted outcome indicators, and we draw conclusions by contrasting outcome indicators in different groups of steatosis. Odds ratios and 95% confidence intervals were calculated. P<0.05 was considered as statistically significant difference. Results. 19 publications were included. There was no significant difference between the group of no steatosis and mild group in primary nonfunction rate (P=0.605) or early graft dysfunction rate (P=0.44). The PNF rate was significantly higher in moderate group (P=0.003) and severe group (P <0.001) compared with that in no steatosis group. The same results were seen in early graft dysfunction rate. However, graft survival rate and patient survival rate did not differ between groups. Conclusions. Livers with mild steatosis, even with moderate or severe steatosis, could be suitable donor under strict control of transplant conditions.

scholarly journals A Comparison of Transplant Outcomes in Peritoneal and Hemodialysis Patients: A Meta-Analysis

2016 ◽  
Vol 42 (2) ◽  
pp. 170-176 ◽  
Author(s):  
Maozhi Tang ◽  
Tianyi Li ◽  
Hong Liu
Keyword(s):  
Survival Rate ◽  
Journal Club ◽  
Meta Analysis ◽  
Graft Function ◽  
Cochrane Central Register ◽  
Transplant Outcomes ◽  
Central Register ◽  
Significant Difference ◽  
Short And Long Term ◽  
The Impact

Background: Peritoneal dialysis (PD) and hemodialysis (HD) have been considered the 2 standard pre-transplant dialysis modalities in patients awaiting kidney transplantation. However, the impact of pretransplant dialysis on the short- and long-term post-transplant outcomes remains controversial. Methods: We searched PubMed, EMBASE and the Cochrane central register of controlled trials for this review. Twelve studies were identified by strict screening for the meta-analysis. Results: We found that pretransplant PD patients had a significantly lower incidence of delayed graft function than HD patients, with an OR 0.67 (95% CI 0.62-0.72, p < 0.05). In contrast, there was no significant difference in the incidence of acute rejection, OR 0.96 (95% CI 0.75-1.16). Pretransplant PD had a better 5-year patient survival rate than HD, with a hazard ratio 0.86 (95% CI 0.79-0.95, p < 0.05); however, there were no significant differences in the graft survival rate (p = 0.08). Conclusions: We found that PD was a better choice of pretransplant dialysis modality than HD. Video Journal Club ‘Cappuccino with Claudio Ronco' at http://www.karger.com/?doi=446272.

scholarly journals Effect of an Oral Adsorbent, AST-120, on Dialysis Initiation and Survival in Patients with Chronic Kidney Disease

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Shingo Hatakeyama ◽  
Hayato Yamamoto ◽  
Akiko Okamoto ◽  
Kengo Imanishi ◽  
Noriko Tokui ◽  
...  
Keyword(s):  
Chronic Kidney Disease ◽  
Survival Rate ◽  
Kidney Disease ◽  
Dialysis Initiation ◽  
Kaplan Meier ◽  
Significant Difference ◽  
Oral Adsorbent ◽  
Matched Study ◽  
The Impact ◽  
Free Rate

The oral adsorbent AST-120 has the potential to delay dialysis initiation and improve survival of patients on dialysis. We evaluated the effect of AST-120 on dialysis initiation and its potential to improve survival in patients with chronic kidney disease. The present retrospective pair-matched study included 560 patients, grouped according to whether or not they received AST-120 before dialysis (AST-120 and non-AST-120 groups). The cumulative dialysis initiation free rate and survival rate were compared by the Kaplan-Meier method. Multivariate analysis was used to determine the impact of AST-120 on dialysis initiation. Our results showed significant differences in the 12- and 24-month dialysis initiation free rate (P<0.001), although no significant difference was observed in the survival rate between the two groups. In conclusion, AST-120 delays dialysis initiation in chronic kidney disease (CKD) patients but has no effect on survival. AST-120 is an effective therapy for delaying the progression of CKD.

scholarly journals Year-round water management for desert bighorn sheep corresponds with visits by predators not bighorn sheep

PLoS ONE ◽  
2020 ◽  
Vol 15 (11) ◽  
pp. e0241131
Author(s):  
Grant M. Harris ◽  
David R. Stewart ◽  
David Brown ◽  
Lacrecia Johnson ◽  
Jim Sanderson ◽  
...  
Keyword(s):  
Water Management ◽  
United States ◽  
Arid Regions ◽  
Puma Concolor ◽  
Mule Deer ◽  
Bighorn Sheep ◽  
Maximum Temperature ◽  
Desert Bighorn Sheep ◽  
Mountain Lions ◽  
Southwest United States

Managing water (e.g., catchments) to increase the abundance and distribution of game is popular in arid regions, especially throughout the southwest United States, where biologists often manage water year-round for desert bighorn sheep (Ovis canadensis nelsoni). Bighorn may visit water when predators (e.g., mountain lions [Puma concolor], coyotes [Canis latrans]) do not, suggesting that differences in species ecology or their surface water requirements influence visit timing. Alternatively, visits by desert bighorn sheep and predators may align. The former outcome identifies opportunities to improve water management by providing water when desert bighorn sheep visit most, which hypothetically may reduce predator presence, range expansion and predation, thereby supporting objectives to increase sheep abundances. Since advancing water management hinges on understanding the patterns of species visits, we identified when these three species and mule deer (Odocoileus hemionus) visited managed waters in three North American deserts (Chihuahuan, Sonoran, Mojave). We unraveled the ecological basis describing why visits occurred by associating species visits with four weather variables using multi-site, multi-species models within a Bayesian hierarchical framework (3.4 million images; 105 locations; 7/2009-12/2016). Desert bighorn sheep concentrated visits to water within 4–5 contiguous months. Mountain lions visited water essentially year-round within all deserts. Higher maximum temperature influenced visits to water, especially for desert bighorn sheep. Less long-term precipitation (prior 6-week total) raised visits for all species, and influenced mountain lion visits 3–20 times more than mule deer and 3–37 times more than sheep visits. Visits to water by prey were inconsistent predictors of visits to water by mountain lions. Our results suggest improvements to water management by aligning water provision with the patterns and ecological explanations of desert bighorn sheep visits. We exemplify a scientific approach to water management for enhancing stewardship of desert mammals, be it the southwest United States or arid regions elsewhere.

scholarly journals Long term (five-year) survival following radical surgical treatment plus adjuvant chemotherapy (FAM) in advanced gastric cancer: a controlled study

2000 ◽  
Vol 55 (4) ◽  
pp. 129-136 ◽  
Author(s):  
Cláudio Bresciani ◽  
Joaquim Gama-Rodrigues ◽  
Victor Strassmann ◽  
Dan L. Waitzberg ◽  
Mitsunori Matsuda ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Surgical Treatment ◽  
Survival Rate ◽  
Tnm Classification ◽  
Controlled Study ◽  
Hematological Toxicity ◽  
Control Group ◽  
Significant Difference ◽  
The Impact

Several drugs and their associations are being used for adjuvant or complementary chemotherapy with the aim of improving results of gastric cancer treatment. The objective of this study was to verify the impact of these drugs on nutrition and on survival rate after radical treatment of 53 patients with gastric cancer in stage III of the TNM classification. A control group including 28 patients who had only undergone radical resection was compared to a group of 25 patients who underwent the same operative technique followed by adjuvant polychemotherapy with FAM (5-fluorouracil, Adriamycin, and mitomycin C). In this latter group, chemotherapy toxicity in relation to hepatic, renal, cardiologic, neurological, hematologic, gastrointestinal, and dermatological functions was also studied. There was no significant difference on admission between both groups in relation to gender, race, macroscopic tumoral type of tumor according to the Borrmann classification, location of the tumor in the stomach, length of the gastric resection, or response to cutaneous tests on delayed sensitivity. Chemotherapy was started on average, 2.3 months following surgical treatment. Clinical and laboratory follow-up of all patients continued for 5 years. The following conclusions were reached: 1) The nutritional status and incidence of gastrointestinal manifestation were similar in both groups; 2) There was no occurrence of cardiac, renal, neurological, or hepatic toxicity or death due to the chemotherapeutic method per se; 3) Dermatological alterations and hematological toxicity occurred exclusively in patients who underwent polychemotherapy; 4) There was no significant difference between the rate and site of tumoral recurrence, the disease-free interval, or the survival rate of both study groups; 5) Therefore, we concluded, after a 5-year follow-up, chemotherapy with the FAM regimen did not increase the survival rate.

scholarly journals Kelangsungan Hidup Larva Planula Acropora sp dalam Pemeliharaan Terkontrol Kepadatan yang Berbeda

2021 ◽  
Vol 1 (2) ◽  
pp. 1-8
Author(s):  
Syafyudin Yusuf ◽  
Juniur Rangan ◽  
Esther Sandamanapa
Keyword(s):  
Survival Rate ◽  
Coral Reefs ◽  
Larval Mortality ◽  
Water Medium ◽  
Coral Larvae ◽  
Reef Restoration ◽  
Significant Difference ◽  
Small Container ◽  
The Impact ◽  
Critical Survival

The survival of coral larvae as early phase of coral life is very important for their viability in environmen. This research aims to determine the survival of Acropora sp planula at different densities intensive nursery, and also to khow the critical survival time of them.. This research method was used experiment in density of larvae were held in control laboratory. The planula were rearing ini small container 200 ml of water while the lavae density were used namely 0.5; 1.0, 1.5, 2.0 larvae / ml. The results indicated that survival rate for larvae of different densities (0.5 larvae/ml; 1.0 larvae/ml; 1.5 larvae/ml; 2.0 larvae/m) did not show any significant difference (P>0.05). the highest survival rate of planula larvae was in the treatment with a density of 1.5 larvae/ml and the lowest from a density of 2.0 larvae/ml, and the most larval mortality was in the first 12 hours of rearing, due to the degree of adaptation of larvae to the rearing water medium in all treatment units, then death coral larvae decreased exponentially. This research will be very useful for efforts to restore coral reefs sexually, so as to reduce the impact of exploitation of coral seedlings which are often taken for asexual coral reef restoration as is often done throughout the world's coral reefs.

scholarly journals Mountain lions prey selectively on prion-infected mule deer

2009 ◽  
Vol 6 (2) ◽  
pp. 209-211 ◽  
Author(s):  
Caroline E. Krumm ◽  
Mary M. Conner ◽  
N. Thompson Hobbs ◽  
Don O. Hunter ◽  
Michael W. Miller
Keyword(s):  
Puma Concolor ◽  
Mule Deer ◽  
Odocoileus Hemionus ◽  
Disease Prevalence ◽  
Front Range ◽  
Same Sex ◽  
Wasting Disease ◽  
Mountain Lions ◽  
Mountain Lion ◽  
Prey Items

The possibility that predators choose prey selectively based on age or condition has been suggested but rarely tested. We examined whether mountain lions ( Puma concolor ) selectively prey upon mule deer ( Odocoileus hemionus ) infected with chronic wasting disease, a prion disease. We located kill sites of mountain lions in the northern Front Range of Colorado, USA, and compared disease prevalence among lion-killed adult (≥2 years old) deer with prevalence among sympatric deer taken by hunters in the vicinity of kill sites. Hunter-killed female deer were less likely to be infected than males (odds ratios (OR) = 0.2, 95% confidence intervals (CI) = 0.1–0.6; p = 0.015). However, both female (OR = 8.5, 95% CI = 2.3–30.9) and male deer (OR = 3.2, 95% CI = 1–10) killed by a mountain lion were more likely to be infected than same-sex deer killed in the vicinity by a hunter ( p < 0.001), suggesting that mountain lions in this area actively selected prion-infected individuals when targeting adult mule deer as prey items.

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