Survival and dispersal variability of pelagic eggs and yolk-sac larvae of central and eastern baltic flounder (Platichthys flesus): application of biophysical models

2016 ◽  
Vol 74 (1) ◽  
pp. 41-55 ◽  
Author(s):  
Hans-Harald Hinrichsen ◽  
Christoph Petereit ◽  
Anders Nissling ◽  
Isa Wallin ◽  
Didzis Ustups ◽  
...  
Keyword(s):  
Survival Rates ◽  
Relative Survival ◽  
Larval Survival ◽  
Yolk Sac ◽  
Bornholm Basin ◽  
Gotland Basin ◽  
Gdansk Deep ◽  
Spawning Areas ◽  
Pelagic Eggs ◽  
Arkona Basin

A hydrodynamic model coupled with a Lagrangian particle tracking technique was utilized to simulate spatially and temporally resolved long-term environmentally related (i) size of habitat suitable for reproduction, (ii) egg/yolk-sac larval survival, (iii) separation of causes of mortality, and (iv) connectivity between spawning areas of Baltic flounder with pelagic eggs. Information on reproduction habitat requirements and mortality sources were obtained from field or laboratory studies. In our modelling study we only quantified physical processes generating heterogeneity in spatial distribution of eggs and yolk-sac larvae, as e.g. predation is not accounted for. The spatial extent of eggs and larvae represented as modelled particles is primarily determined by oxygen and salinity conditions. The reproduction habitat most suitable was determined for the Gdansk Deep, followed by the Bornholm Basin. Relatively low habitat suitability was obtained for the Arkona Basin and the Gotland Basin. The model runs also showed yolk-sac larval survival to be to a large extent affected by sedimentation. Eggs initially released in the Arkona Basin and Bornholm Basin are strongly affected by sedimentation compared with those released in the Gdansk Deep and Gotland Basin. Highest relative survival of eggs occurred in the Gdansk Deep and in the Bornholm Basin. Relatively low survival rates in the Gotland Basin were attributable to oxygen-dependent mortality. Oxygen content had almost no impact on survival in the Arkona Basin. For all spawning areas mortality caused by lethally low temperatures was only evident after severe winters. Buoyancy of eggs and yolk-sac larvae in relation to topographic features appear as a barrier for the transport of eggs and yolk-sac larvae and potentially limits the connectivity of early life stages between the different spawning areas.

scholarly journals Spatio-temporal variability in western Baltic cod early life stage survival mediated by egg buoyancy, hydrography and hydrodynamics

2012 ◽  
Vol 69 (10) ◽  
pp. 1744-1752 ◽  
Author(s):  
H-H. Hinrichsen ◽  
K. Hüssy ◽  
B. Huwer
Keyword(s):  
Temporal Variability ◽  
Early Life ◽  
Life Stage ◽  
Survival Rates ◽  
Early Life Stage ◽  
Yolk Sac ◽  
Biophysical Model ◽  
Spawning Areas ◽  
Spatio Temporal ◽  
Baltic Cod

Abstract Hinrichsen, H-H., Hüssy, K., and Huwer, B. 2012. Spatio-temporal variability in western Baltic cod early life stage survival mediated by egg buoyancy, hydrography and hydrodynamics. – ICES Journal of Marine Science, 69: 1744–1752. To disentangle the effects of different drivers on recruitment variability of marine fish, a spatially and temporally explicit understanding of both the spawning stock size and the early life stage dynamics is required. The objectives of this study are to assess the transport of western Baltic cod early life stages as well as the variability in environmentally-mediated survival along drift routes in relation to both spatial (within and between different spawning areas) and temporal (interannual and seasonal) dynamics. A spatially and temporally highly-resolved biophysical model of the Baltic Sea was used to describe mortalities and survival success of eggs and yolk-sac larvae—represented by individual, virtual drifters—as predicted proportions of drifters that either died due to bottom contact or lethal temperatures, or that survived up to the end of the yolk-sac larval stage. The environmental conditions allowing survival of cod and yolk-sac larvae indicate that favourable conditions predominately occurred during the late spawning season, while minimum survival rates could be expected from January to March. The spatial analysis of different spawning areas revealed highest survival chances in the Kattegat, intermediate survival in the Great Belt, and only low survival in the Sound, Kiel Bay and Mecklenburg Bay.

scholarly journals Biophysical modeling of larval Baltic cod (Gadus morhua) growth and survival

2002 ◽  
Vol 59 (12) ◽  
pp. 1858-1873 ◽  
Author(s):  
H.-H Hinrichsen ◽  
C Möllmann ◽  
R Voss ◽  
F W Köster ◽  
G Kornilovs
Keyword(s):  
Gadus Morhua ◽  
Calanoid Copepod ◽  
Survival Rates ◽  
Three Dimensional ◽  
Larval Survival ◽  
Early Summer ◽  
High Survival ◽  
Biophysical Modeling ◽  
Bornholm Basin ◽  
Growth And Survival

A coupled hydrodynamic–trophodynamic individual-based model of drift and feeding was utilized to analyze the intra- and inter-annual variability in growth and survival of cod (Gadus morhua) larvae in the central Baltic Sea. Highly temporally and spatially resolved simulated flow fields were used to investigate the potential drift of larval cod from the centre of spawning effort in the Bornholm Basin towards their nursery areas through temporally resolved three-dimensional idealized prey fields. Stomach content analyses of larval cod from the Bornholm Basin revealed calanoid copepod nauplii and early copepodite stages to be the preferred prey organisms. The results of the model runs indicate that larval cod changed from a nonlimited to a food-limited stage because of the strong decrease in abundance of the calanoid copepod Pseudocalanus elongatus during the last two decades. The modeling study revealed retention and dispersal from the main spawning ground to be a key process influencing larval survival. When P. elongatus was available in the prey fields, high cod larval survival rates occurred in spring and early summer. In contrast, when P. elongatus was not available, hatched larvae had only high survival probabilities later in the year or if they were transported into shallower coastal regions.

scholarly journals German oncology certification system for colorectal cancer – relative survival rates of a single certified centre vs. national and international registry data

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Maximilian Richter ◽  
Lena Sonnow ◽  
Amir Mehdizadeh-Shrifi ◽  
Axel Richter ◽  
Rainer Koch ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Rectal Cancer ◽  
International Comparison ◽  
Cancer Registry ◽  
Survival Data ◽  
Survival Rates ◽  
Relative Survival ◽  
Registry Data ◽  
Cancer Registry Data ◽  
Colon And Rectal Cancer

Abstract Objectives To evaluate how the certification of specialised Oncology Centres in Germany affects the relative survival of patients with colorectal cancer (CRC) by means of national and international comparison. Methods Between 2007 and 2013, 675 patients with colorectal cancer, treated at the Hildesheim Hospital, an academic teaching hospital of the Hannover Medical School (MHH), were included. A follow-up of the entire patient group was performed until 2014. To obtain international data, a SEER-database search was done. The relative survival of 148,957 patients was compared to our data after 12, 36 and 60 months. For national survival data, we compared our rates with 41,988 patients of the Munich Cancer Registry (MCR). Results Relative survival at our institution tends to be higher in advanced tumour stages compared to national and international cancer registry data. Nationally we found only little variation in survival rates for low stages CRC (UICC I and II), colon, and rectal cancer. There were notable variations regarding relative survival rates for advanced CRC tumour stages (UICC IV). These variations were even more distinct for rectal cancer after 12, 36 and 60 months (Hildesheim Hospital: 89.9, 40.3, 30.1%; Munich Cancer Registry (MCR): 65.4, 28.7, 16.6%). The international comparison of CRC showed significantly higher relative survival rates for patients with advanced tumour stages after 12 months at our institution (77 vs. 54.9% for UICC IV; raw p<0.001). Conclusions Our findings suggest that patients with advanced tumour stages of CRC and especially rectal cancer benefit most from a multidisciplinary and guidelines-oriented treatment at Certified Oncology Centres. For a better evaluation of cancer treatment and improved national and international comparison, the creation of a centralised national cancer registry is necessary.

Prostate Cancer: Population-Based Survival Rates in Central Italy

1995 ◽  
Vol 81 (2) ◽  
pp. 81-85 ◽  
Author(s):  
Emanuele Crocetti ◽  
Eva Buiatti ◽  
Andrea Amorosi
Keyword(s):  
Prostate Cancer ◽  
Central Italy ◽  
Survival Rates ◽  
Relative Survival ◽  
Tumor Grade ◽  
Population Based ◽  
Prognostic Effect ◽  
Disease Extension ◽  
The One ◽  
Histological Verification

Aims To evaluate survival in prostate cancer patients in the Province of Florence where the Tuscany Cancer Registry is active. Methods The survival of 777 patients with prostate cancer diagnosed in the period 1985-87 was evaluated. The observed and relative survival rates 1, 3 and 5 years after diagnosis were computed. Also the prognostic effect of age, disease extension, tumor grade, histological verification, place of residence and year of diagnosis were evaluated using univariate and multivariate analysis. Results The observed survival was 73.4% 1 year, 42.5% 3 years and 29.2% 5 years after diagnosis. The relative survival was respectively 78.7%, 53.0% and 43.0%. Significant independent risks were evident when the disease was extended out of the prostate, for patients older than 80 years, for high grade tumors and for patients without histological verification. Conclusion The 5-year relative survival rate in the province of Florence is similar to those from other European Registries and the Latina Registry, but much lower than the one reported by the SEER program in the US. Data on histological verification percentage, availability of information on disease extension, and tumor grade are discussed as indicators of the quality of the diagnostic approach in comparison with other registries.

Acute de novo Leukemia in Estonia and Western Sweden 1982-2006: Positive Trend in the Survival of Acute Leukemia over 25 Years

2016 ◽  
Vol 136 (3) ◽  
pp. 167-173 ◽  
Author(s):  
Erik Hulegårdh ◽  
Mari Punab ◽  
Erik Holmberg ◽  
Katrin Palk ◽  
Edward Laane ◽  
...  
Keyword(s):  
Acute Leukemia ◽  
Cancer Survival ◽  
De Novo ◽  
Survival Rates ◽  
Relative Survival ◽  
West Germany ◽  
Eastern Bloc ◽  
Positive Trend ◽  
The European Union ◽  
Hematopoietic Stem

This study focuses on the incidence, treatment, and survival of de novo acute leukemia in a 25-year perspective in western Sweden and Estonia. At the beginning of our study, Estonia was a part of the Eastern bloc with planned economy, but since 1991 it is a member of the European Union and transforming into a market economy. Survival rates have steadily increased in both countries. However, a gap between their survival curves remains. Based on our data, it is difficult to explain the big difference in the 5-year relative survival in favor of western Sweden (55 vs. 22%). In Germany, there was a big difference in overall cancer survival between East and West Germany after the fall of the iron curtain, but today no difference is seen. Differences in survival are probably due to a higher proportion of intense chemotherapy regimens and a higher rate of hematopoietic stem cell transplantations in Sweden. Other important factors might be better supportive care and diagnostics as well as better adjuvant therapy. Better staff training and conditions in wards are also factors that might play an essential role.

Survival trends in chronic lymphocytic leukemia in the era of oral targeted therapies in the United States: SEER database analyses (1985 to 2017).

2021 ◽  
Vol 39 (15_suppl) ◽  
pp. 7524-7524
Author(s):  
Neda Alrawashdh ◽  
Ali McBride ◽  
Daniel O. Persky ◽  
Joann Sweasy ◽  
Brian Erstad ◽  
...  
Keyword(s):  
Chronic Lymphocytic Leukemia ◽  
Survival Rates ◽  
Relative Survival ◽  
Lymphocytic Leukemia ◽  
Disease Stage ◽  
Seer Database ◽  
Cure Model ◽  
Gender And Age ◽  
Long Term Survivors

7524 Background: The survival of chronic lymphocytic leukemia (CLL) patients has progressively improved after the approval of new targeted therapy for first-line treatment and relapsed disease. We performed a corresponding analysis from the U.S. population-based SEER database (1973–2017) to explore the trend of survival and the effect of advanced CLL treatment on overall survival in CLL patients. Methods: Data were extracted from SEER*Stat for all patients 15 years or older with a primary diagnosis of CLL with or without subsequent cancers. A period analysis was performed to estimate the 5- and 10-year relative survival rates for patients diagnosed (dx) during different calendar periods from 1985 to 2017, based on gender and age at time of diagnosis (15–44, 45–54, 55–64, 65–74, 75–84, 85 years or older). A mixture cure model was used to examine the proportion of long-term survivors per gender and age category among CLL patients diagnosed between 1985 and 2015. Cox proportional hazard modeling was used to calculate the hazard ratios (HRs) of death adjusted for gender and age at diagnosis for two cohorts: (a) diagnosed in 2000–2003 and followed to 2012; (b) 2004–2007 and followed to 2015. Results: For males, the 5-year age-adjusted relative survival rate improved progressively from 72.0% (dx 1985-1989) to 88.2% (dx 2010-2014); for females, from 76.8% (dx 1985-1989) to 90.8% (dx 2010-2014). The corresponding 10-year age-adjusted relative survival rates were 47.3% (dx 1985-1989) and 72.5% (dx 2005-2009) for males; and 58.2% (dx 1985-1989) and 78.7% (dx 2005-2009) for females. The table below shows the proportions of long-term survivors for the 1985–2017 cohort as estimated in the mixed cure model. The HRs (95%CI) of death for cohort (b) in comparison to cohort (a) were 0.58 (0.43–0.78), 0.58 (0.48–0.70), 0.57 (0.49–0.67), 0.68 (0.54–0.85); and 0.83 (0.68–1.02) for age categories of 45–54, 55–64, 65–74, 75–84, and 85 years or old. Conclusions: Survival is significantly improved by calendar period among patients diagnosed after 2004 and treated in the era of advanced therapies. Females and younger patients had a higher probability of long term survival. Future studies should consider such covariates as treatment type, disease stage and genetics.[Table: see text]

Survival of red-capped robins (Petroica goodenovii) in woodland remnants of central western New South Wales, Australia

2001 ◽  
Vol 28 (6) ◽  
pp. 565 ◽  
Author(s):  
Richard E. Major ◽  
Greg Gowing
Keyword(s):  
Survival Rates ◽  
Relative Survival ◽  
Adult Mortality ◽  
Annual Survival ◽  
Survival Probabilities ◽  
South Wales ◽  
Winter Half ◽  
Linear Habitat ◽  
Significant Difference ◽  
Summer Half

To determine relative survival rates of small birds occupying small, linear strips of woodland compared with large patches of woodland, marked populations of red-capped robins were monitored over a two-year period. In total, 196 male robins were banded with unique colour combinations in 10 woodland remnants and censused by song playback at half-yearly intervals. The Cormack–Jolly–Seber method was used to calculate half-yearly survival probabilities for birds in the two habitat configurations and the strongest model included separate survival parameters for summer (36.2% 5.1) and autumn (88.9% 13.5) half-years, but a constant recapture probability (50.5% 7.2). The inclusion of separate parameters for the large and linear habitat configurations reduced the strength of the model, indicating that there was no significant difference between the survival rates of birds occupying small, linear strips of woodland and birds occupying large patches of woodland. The mean annual survival, determined by multiplying the half-yearly survival probabilities, was 32%, which is low, compared with the annual survival of other Petroica robins. Although no banded birds were located away from the banding site, we suspect that much of the ‘mortality’ represented emigration during the summer half-year. Under this scenario a better estimate of annual survival (79%) might be achieved by extrapolation of survival over the winter half-year. This study provides no data to support the contention that adult mortality is higher in small, linear strips of habitat, although further data on the fate of birds that disappear from remnants is required before this is conclusive. In addition, to detect a 20% difference in survival using similar methods to the present study, with their accompanying sources of variation, at least 10 times the number of birds would need to be monitored. This might most effectively be done as a co-operative banding project.

scholarly journals Lung Cancer Survival in Lithuania: Changes by Histology, Age, and Sex From 2003-2007 to 2008-2012

2019 ◽  
Vol 26 (1) ◽  
pp. 107327481983608 ◽  
Author(s):  
Vaida Gedvilaitė ◽  
Edvardas Danila ◽  
Saulius Cicėnas ◽  
Giedrė Smailytė
Keyword(s):  
Lung Cancer ◽  
Cell Carcinoma ◽  
Cancer Survival ◽  
Survival Rates ◽  
Age Groups ◽  
Relative Survival ◽  
International Classification Of Diseases ◽  
Advanced Lung Cancer ◽  
Almost All ◽  
Disease Stages

Lung cancer is the most common cancer-related death worldwide. The aim of this study is to describe the most recent survival rates by sex, age group, extent of disease, and histology of lung cancer in Lithuania. The study is based on the Lithuanian Cancer Registry database. The analysis included patients with primary invasive lung cancer diagnosed in 1998 to 2012 (International Classification of Diseases, Tenth Revision C33 and C34). Patients were followed up with respect to vital status until December 31, 2012. Five-year relative survival estimates were calculated using period analysis. Relative survival was calculated as the ratio of the observed survival of patients with cancer and the expected survival of the underlying general population. In our study, the overall 5-year relative survival was low but increased slightly (10.7%) from 2003–2007 to 2008–2012. Positive changes in survival were evident in both sexes, in almost all age groups and for all histological groups and disease stages. Adenocarcinoma relative survival increased from 6.7% in 2003–2007 to 12.8% in 2008–2012 and squamous cell carcinoma increased from 7.4% in 2003–2007 to 11.1% in 2008–2012. Patients with small-cell carcinoma had the worst survival (2.9% in 2003-2007 and 3.6% in 2008–2012). The majority of patients with lung cancer are diagnosed with advanced disease. The number of new cases of advanced lung cancer increased from 35.1% to 37.8%. Despite low overall survival, there were positive changes in survival in both sexes, in almost all age groups, and for all histological groups and disease stages. The survival rate of patients with lung cancer in Lithuania is similar to that in other European countries.

scholarly journals Esophageal Cancer in Canada: Trends according to Morphology and Anatomical Location

2012 ◽  
Vol 26 (10) ◽  
pp. 723-727 ◽  
Author(s):  
Michael C Otterstatter ◽  
James D Brierley ◽  
Prithwish De ◽  
Larry F Ellison ◽  
Maureen MacIntyre ◽  
...  
Keyword(s):  
Squamous Cell Carcinoma ◽  
Esophageal Cancer ◽  
Cell Carcinoma ◽  
Esophageal Adenocarcinoma ◽  
Squamous Cell ◽  
Survival Rates ◽  
Relative Survival ◽  
Incidence Rates ◽  
Anatomical Location ◽  
Males And Females

BACKGROUND: Esophageal adenocarcinoma has one of the fastest rising incidence rates and one of the lowest survival rates of any cancer type in the Western world. However, in many countries, trends in esophageal cancer differ according to tumour morphology and anatomical location. In Canada, incidence and survival trends for esophageal cancer subtypes are poorly known.METHODS: Cancer incidence and mortality rates were obtained from the Canadian Cancer Registry, the National Cancer Incidence Reporting System and the Canadian Vital Statistics Death databases for the period from 1986 to 2006. Observed trends (annual per cent change) and five-year relative survival ratios were estimated separately for esophageal adenocarcinoma and squamous cell carcinoma, and according to location (upper, middle, or lower one-third of the esophagus). Incidence rates were projected up to the year 2026.RESULTS: Annual age-standardized incidence rates for esophageal cancer in 2004 to 2006 were 6.1 and 1.7 per 100,000 for males and females, respectively. Esophageal adenocarcinoma incidence rose by 3.9% (males) and 3.6% (females) per year for the period 1986 to 2006, with the steepest increase in the lower one-third of the esophagus (4.8% and 5.0% per year among males and females, respectively). In contrast, squamous cell carcinoma incidence declined by 3.3% (males) and 3.2% (females) per year since the early 1990s. The five-year relative survival ratio for esophageal cancer was 13% between 2004 and 2006, approximately a 3% increase since the period from 1992 to 1994. Projected incidence rates showed increases of 40% to 50% for esophageal adenocarcinoma and decreases of 30% for squamous cell carcinoma by 2026.DISCUSSION: Although esophageal cancer is rare in Canada, the incidence of esophageal adenocarcinoma has doubled in the past 20 years, which may reflect the increasing prevalence of obesity and gastroesophageal reflux disease. Declines in squamous cell carcinoma may be the result of the decreases in the prevalence of smoking in Canada. Given the low survival rates and the potential for further increases in incidence, esophageal adenocarcinoma warrants close attention.

scholarly journals Effects of Temperature on the Survival and Larval Development of Deiratonotus Japonicus (Brachyura, Camptandriidae) as a Biological Indicator

2020 ◽  
Vol 8 (3) ◽  
pp. 213 ◽  
Author(s):  
Il-Kweun Oh ◽  
Seung-Woo Lee
Keyword(s):  
Larval Development ◽  
Brachionus Plicatilis ◽  
Survival Rates ◽  
Biological Indicator ◽  
Larval Survival ◽  
Effect Of Temperature ◽  
Larval Stages ◽  
Kanagawa Prefecture ◽  
Survival And Growth ◽  
Increasing Temperature

Deiratonotus japonicus (D. japonicus) inhabits isolated locations and upstream brackish waters from Kanagawa Prefecture to Okinawa Prefecture in Japan. This species faces the threat of extinction because of changing habitat conditions. Our previous studies have shown that its complete larval development from hatching to metamorphosis consists of five zoeal stages and one megalopal stage. In this study, the effect of temperature on the survival and growth of larval development in D. japonicus under controlled laboratory conditions of 13, 18, 23, 24, 25, and 26 °C was investigated by rearing larvae (30 PSU; 12:12 h light/dark cycle; fed a diet of Brachionus plicatilis rotundiformis and Artemia sp. nauplii). The survival rates and developmental periods were measured for each larval stage. The highest survival rates were obtained at 18–24 °C. Metamorphosis to megalopa occurred at 23–25 °C. There were rapid and synchronous developments at 25–26 °C but delayed and extended developments at 13 °C. The molting period decreased with increasing temperature. With decreasing temperature, the beginning of the development and duration of molting was prolonged. In addition, there were very low survival rates at 13 °C and 26 °C in all zoeal stages. Our results indicate that the early larval stages of D. japonicus are well adapted to 18–24 °C, the range observed in the estuarine marine environment of the Kita River during the breeding season. Optimum larval survival and growth were obtained at 23 °C. Temperature significantly affected the survival rate, developmental period, and molting of the larvae. The relationship between the cumulative periods of development from hatching through individual larval stages (y) and temperatures (T) was described as a power function (y = a × Tb).

Sign in / Sign up

Export Citation Format

Share Document