scholarly journals Infection of Baltic herring (Clupea harengus membras) with Anisakis simplex larvae, 1992–1999: a statistical analysis using generalized linear models

2003 ◽  
Vol 60 (1) ◽  
pp. 85-93 ◽  
Author(s):  
M Podolska
Keyword(s):  
Statistical Analysis ◽  
Generalized Linear Models ◽  
Linear Models ◽  
Anisakis Simplex ◽  
Clupea Harengus ◽  
Baltic Herring

scholarly journals Acetylcholinesterase activity in hosts (herring Clupea harengus) and parasites (Anisakis simplex larvae) from the southern Baltic

2006 ◽  
Vol 63 (1) ◽  
pp. 161-168 ◽  
Author(s):  
Magdalena Podolska ◽  
Dorota Napierska
Keyword(s):  
Generalized Linear Models ◽  
Coastal Waters ◽  
Ache Activity ◽  
Linear Models ◽  
Acetylcholinesterase Activity ◽  
Anisakis Simplex ◽  
Clupea Harengus ◽  
Vistula Lagoon ◽  
Polluted Sites ◽  
Southern Baltic

Abstract This study compares the acetylcholinesterase (AChE) activity of herring Clupea harengus infected with Anisakis simplex larvae and non-infected individuals caught in coastal waters of the southern Baltic. Acetylcholinesterase activity was measured spectrophotometrically. Generalized linear models were applied to analyse the dependence of AChE activity on the area of sampling and the biological parameters of fish and their parasites. The AChE activity of herring was higher in samples from the western and central coasts (regarded as “clean” waters) than in fish caught in the semi-enclosed areas of the Gulf of Gdańsk and Vistula Lagoon (regarded as “polluted” sites). The opposite relationship was noted in the activity of AChE extracted from A. simplex larvae. In male hosts, the parasitic AChE activity was markedly higher than in the females in all examined areas.

Changes in the distribution of Poplar Box (Eucalyptus populnea) on major soil groups: An application of the log-linear model.

1981 ◽  
Vol 3 (1) ◽  
pp. 33 ◽  
Author(s):  
RB Cunningham ◽  
AA Webb ◽  
A Mortlock
Keyword(s):  
Statistical Analysis ◽  
Linear Model ◽  
Generalized Linear Models ◽  
Gradient Analysis ◽  
Linear Models ◽  
Geographic Location ◽  
Significance Tests ◽  
Log Linear ◽  
Eucalyptus Populnea ◽  
Soil Groups

The association of poplar box (Eucalyptus populnea) with five main soil groups is examined. A statistical analysis, using a log- linear model, indicated that the relative frequencies of poplar box sites occumng on major soil groups changed with geographic location. The change in distribution is shown to relate to climate, as indicated by summer and winter moisture indices and the diff- erence between them. This study illustrates the use of log-linear models in ecology; such models, and more generally, Generalized Linear Models, in providing significance tests, have advantages over the non-statistical methods of gradient analysis.

scholarly journals A Statistical Analysis of the Lake Levels at Lake Neusiedl

2016 ◽  
Vol 37 (2) ◽  
Author(s):  
Johannes Ledolter
Keyword(s):  
Statistical Analysis ◽  
Generalized Linear Models ◽  
Lake Level ◽  
Linear Models ◽  
Daily Precipitation ◽  
Lake Levels ◽  
Lake Level Changes ◽  
Daily Data ◽  
Eastern Border ◽  
Logistic Regressions

A long record of daily data is used to study the lake levels of Lake Neusiedl, a large steppe lake at the eastern border of Austria. Daily lake level changes are modeled as functions of precipitation, temperature, and wind conditions. The occurrence and the amount of daily precipitation are modeled with logistic regressions and generalized linear models.

scholarly journals Immunohistochemical Characterization of Tumor-Associated Macrophages in Canine Lymphomas

Animals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 2301
Author(s):  
Sergio Vázquez ◽  
Raquel Vallejo ◽  
José Espinosa ◽  
Noive Arteche ◽  
José A. Vega ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
B Cell ◽  
Generalized Linear Models ◽  
Linear Models ◽  
Histological Grade ◽  
Heterogeneous Population ◽  
High Grade ◽  
B Cell Lymphomas ◽  
Cd20 Antibodies

Macrophages have been confirmed to play a significant role in the behavior of human lymphomas, albeit no consistent data are so far available in canine lymphomas. The present study characterizes the macrophages present in cases of canine nodal lymphoma and their relationship with the histological grade and the immunophenotype. Samples from the lymph nodes of 25 dogs diagnosed with lymphoma were selected. Immunohistochemistry was used to determine the tumor immunophenotype (CD3 and CD20 antibodies) and macrophage characterization (Iba1, MAC387, CD204, CD163 and iNOS antibodies). Macrophage counting was performed in 10 randomly selected, high-power fields per sample. Generalized linear models with Poisson distribution were used for statistical analysis. A significantly greater number of macrophages (Iba1+) were detected in high-grade and B-cell lymphomas. The highest amount of both M1 (iNOS+) and M2 (CD204+ and CD163+) subtypes were observed in B-cell lymphomas. High-grade lymphomas showed a greater number of CD204+ and CD163+ cells and recently recruited MAC387+ macrophages. The latter were most abundant in T than in B-cell lymphomas. In conclusion, a significant population of macrophages is present in canine lymphomas, which constitute a heterogeneous population that shows variations in the amount and immunohistochemical profile according to the histological grade and immunophenotype.

scholarly journals Correcting for vessel avoidance in acoustic-abundance estimates for herring

2008 ◽  
Vol 65 (6) ◽  
pp. 1036-1045 ◽  
Author(s):  
Vidar Hjellvik ◽  
Nils Olav Handegard ◽  
Egil Ona
Keyword(s):  
Generalized Linear Models ◽  
Linear Models ◽  
Clupea Harengus ◽  
Target Strength ◽  
Correction Factors ◽  
Correction Procedure ◽  
True Density ◽  
Abundance Estimates ◽  
The Mean ◽  
Specific Experiment

AbstractHjellvik, V., Handegard, N. O., and Ona, E. 2008. Correcting for vessel avoidance in acoustic-abundance estimates for herring. – ICES Journal of Marine Science, 65: 1036–1045. When a research vessel passes over a school or layer of herring (Clupea harengus), the fish may avoid the vessel by swimming downwards and horizontally. If the orientation of the fish is changed in this process, the mean target strength may also be altered. Consequently, the echo abundance measured by the relatively narrow echosounder beam does not always reflect the true density of the school in the undisturbed situation. This avoidance behaviour has been quantified in several experiments where a stationary, submerged transducer has been used to measure the changes in echo abundance during the passage of a survey vessel. Two approaches for correcting the echo abundance for avoidance are presented. The first is to correct in each depth layer separately, but this does not account for diving during vessel passage. The second is to correct the total echo abundance based on the mean depth of the fish at passage. Generalized linear models are fitted to the experimental data in both approaches. The parameters are estimated with uncertainty, which is taken into account when the fitted models are used for correcting standard survey data. The models were fitted to data from various experiments conducted during the period 1996–2004. The avoidance response differed strongly between experiments, indicating that correction factors estimated from one specific experiment should not be used uncritically in a standard correction procedure.

scholarly journals Variation in the prevalence of the externally visible pathological symptoms affecting Baltic herring

1998 ◽  
Vol 28 (2) ◽  
pp. 49-62
Author(s):  
Włodzimierz Grygiel
Keyword(s):  
Baltic Sea ◽  
Geographical Distribution ◽  
Geographical Area ◽  
Anisakis Simplex ◽  
Clupea Harengus ◽  
Sample Collection ◽  
Baltic Herring ◽  
The North ◽  
North Eastern ◽  
Eastern Baltic

Geographical distribution of Baltic herring (Clupea harengus membras (L., 1761)) affected with externally visible pathological symptoms is demonstrated, based on the observations of 5 028 individuals. The fish were collected in period 25.11-08.12.1994, from 36 sampling hauls performed on a transect from the south-western to the north-eastern Baltic Sea. The results of analyses indicate statistically significant differences in the fraction of herring with externally visible diseases (mean percentage of 3.7%) dependent on the geographical area. A relationship between the prevalence of emaciation (mean prevalence of 3.3%), infection (mean prevalence of 3.7%) in herring with the parasitic larvae of Anisakis simplex (Rudolphi, 1809), and the area of sample collection was shown to exist.

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