Host body size and the abundance of chewing lice (Phthiraptera: Amblycera, Ischnocera) infesting eight owl species (Aves: Strigiformes) in Manitoba, Canada

2019 ◽  
Vol 151 (5) ◽  
pp. 621-628 ◽  
Author(s):  
Robert J. Lamb ◽  
Terry D. Galloway
Keyword(s):  
Body Size ◽  
Body Mass ◽  
Louse Infestation ◽  
Mean Intensity ◽  
Chewing Lice ◽  
Host Body ◽  
Abundant Genus ◽  
Louse Species ◽  
The Relationship ◽  
Host Body Mass

AbstractSpecimens (n = 508) of eight species of owl (Aves: Strigiformes) collected from 1994 to 2017 in Manitoba, Canada, were weighed and examined for chewing lice (Phthiraptera: Amblycera, Ischnocera). The relationship between host body mass and infestation by 12 species of lice was examined. Host body mass explained 52% (P = 0.03) of the variation in mean intensity of louse infestation among hosts, due primarily to a high abundance of lice on the heaviest owl species. The relationship was due to the mean intensity of lice, and neither species richness nor the prevalence of lice was related to host body mass. For individual louse species, the relationship was due primarily to Kurodaia acadicae Price and Beer, Kurodaia magna Emerson, and an undetermined species of Kurodaia Uchida (Phthiraptera: Menoponidae) (R2 = 0.997), but not the nine Strigiphilus Mjöberg (Phthiraptera: Philopteridae) species (R2 = 0.27). Louse intensity did not increase with body size for individual birds of any of the owl species. Mean intensity is expected to increase in proportion with the size, specifically the surface area, of the host. Why that relationship holds only for one louse genus, and not for the most abundant genus of lice on owls, and weakly compared with other families of birds, has yet to be determined.

Abundance of chewing lice (Phthiraptera: Amblycera and Ischnocera) increases with the body size of their host woodpeckers and sapsuckers (Aves: Piciformes: Picidae)

2017 ◽  
Vol 149 (4) ◽  
pp. 473-481 ◽  
Author(s):  
Terry D. Galloway ◽  
Robert J. Lamb
Keyword(s):  
Body Size ◽  
Body Mass ◽  
Host Species ◽  
The Body ◽  
Louse Infestation ◽  
Mean Intensity ◽  
Chewing Lice ◽  
Host Body ◽  
Northern Flicker ◽  
Host Body Mass

AbstractSpecimens of five species of woodpeckers (Piciformes: Picidae) from Manitoba, Canada, were weighed and examined for chewing lice, 1998–2015: downy woodpecker (Picoides pubescens (Linnaeus), n=49), hairy woodpecker (Picoides villosus (Linnaeus), n=23), pileated woodpecker (Dryocopus pileatus (Linnaeus), n=10), northern flicker (Colaptes auratus (Linnaeus), n=170), and yellow-bellied sapsucker (Sphyrapicus varius (Linnaeus), n=239). The relationship between body mass of each host species and infestation by seven species of lice was analysed: Menacanthus pici (Denny) from all host species, Brueelia straminea (Denny) from Picoides Lacépède species, Penenirmus jungens (Kellogg) from northern flicker, Penenirmus auritus (Scopoli) from the other four hosts, Picicola porisma Dalgleish from northern flicker, Picicola snodgrassi (Kellogg) from Picoides species, and Picicola marginatulus (Harrison) from pileated woodpeckers. Mean abundance of lice increased with the mean mass of their host. Neither the species richness of lice nor the prevalence of lice were related to host body mass. Host body mass explained 98% of the variation in mean intensity of louse infestation among hosts. The positive association of mean intensity and body size was also detected for three genera of lice. Louse intensity also increased with body size for individual birds, more so for some species of lice and hosts than others. Body size matters, but the adaptations that allow higher mean intensity on larger host species remain to be determined.

Chewing lice (Phthiraptera: Amblycera and Ischnocera) infesting woodpeckers and sapsuckers (Aves: Piciformes: Picidae) in Manitoba, Canada

2016 ◽  
Vol 148 (5) ◽  
pp. 520-531 ◽  
Author(s):  
Terry D. Galloway ◽  
Robert J. Lamb
Keyword(s):  
Louse Infestation ◽  
Mean Intensity ◽  
Chewing Lice ◽  
Northern Flicker ◽  
Picoides Pubescens ◽  
Louse Species ◽  
Colaptes Auratus ◽  
Pileated Woodpeckers ◽  
Picoides Villosus

AbstractFive species of woodpeckers (Piciformes: Picidae) in Manitoba, Canada were examined for chewing lice (Phthiraptera: Amblycera and Ischnocera): downy woodpecker (DOWO) (Picoides pubescens (Linnaeus), n=56), hairy woodpecker (HAWO) (Picoides villosus (Linnaeus), n=32), pileated woodpecker (PIWO) (Dryocopus pileatus (Linnaeus), n=12), northern flicker (NOFL) (Colaptes auratus (Linnaeus), n=223), and yellow-bellied sapsucker (YBSA) (Sphyrapicus varius (Linnaeus), n=192). Seven species of lice were collected (total number=40 613): Menacanthus pici (Denny) from all species of woodpeckers, Brueelia straminea (Denny) from both species of Picoides Lacépède, Penenirmus jungens (Kellogg) from northern flicker, Penenirmus auritus (Scopoli) from all species of woodpeckers examined except northern flickers, Picicola porisma Dalgleish from northern flickers, Picicola snodgrassi (Kellogg) from both species of Picoides, and Picicola marginatulus (Harrison) from pileated woodpeckers. Prevalence for total louse infestation ranged from 32.3% to 85.7% (NOFL>YBSA>PIWO>DOWO>HAWO). Mean intensity for total lice ranged from 29.2 to 232.4 (PIWO>NOFL>HAWO>YBSA>DOWO). Infestation parameters for each louse/host combination are provided. Distribution of louse infestations was highly aggregated. In all louse/host combinations, either females were more prevalent than males or there was no significant deviation from 50:50. There was a tendency for louse species to co-occur on the same host specimen.

scholarly journals The Influence of Host Body Size and Food Guild on Prevalence and Mean Intensity of Chewing Lice (Phthiraptera) on Birds in Southern China

2019 ◽  
Vol 105 (2) ◽  
pp. 334 ◽  
Author(s):  
Xingzhi Chu ◽  
Bilal Dik ◽  
Daniel R. Gustafsson ◽  
Xianli Che ◽  
Qiang Zhang ◽  
...  
Keyword(s):  
Body Size ◽  
Southern China ◽  
Mean Intensity ◽  
Chewing Lice ◽  
Host Body ◽  
Host Body Size

scholarly journals Intraspecific Variation in Maximum Ingested Food Size and Body Mass in Varecia rubra and Propithecus coquereli

2011 ◽  
Vol 2011 ◽  
pp. 1-8 ◽  
Author(s):  
Adam Hartstone-Rose ◽  
Jonathan M. G. Perry
Keyword(s):  
Body Size ◽  
Body Mass ◽  
Individual Variation ◽  
Size Variation ◽  
Maximum Size ◽  
Least Squares Regression ◽  
Scaling Relationship ◽  
Varecia Rubra ◽  
Food Size ◽  
The Relationship

In a recent study, we quantified the scaling of ingested food size (Vb )—the maximum size at which an animal consistently ingests food whole—and found that Vb scaled isometrically between species of captive strepsirrhines. The current study examines the relationship between Vb and body size within species with a focus on the frugivorous Varecia rubra and the folivorous Propithecus coquereli. We found no overlap in Vb between the species (all V. rubra ingested larger pieces of food relative to those eaten by P. coquereli), and least-squares regression of Vb and three different measures of body mass showed no scaling relationship within each species. We believe that this lack of relationship results from the relatively narrow intraspecific body size variation and seemingly patternless individual variation in Vb within species and take this study as further evidence that general scaling questions are best examined interspecifically rather than intraspecifically.

The Relationship between Body Mass Index and Body Size Dissatisfaction in Young Adolescents: Spline Function Analysis

2010 ◽  
Vol 110 (7) ◽  
pp. 1098-1102 ◽  
Author(s):  
Samuele Cortese ◽  
Bruno Falissard ◽  
Yolande Pigaiani ◽  
Claudia Banzato ◽  
Giovanna Bogoni ◽  
...  
Keyword(s):  
Body Mass Index ◽  
Body Size ◽  
Body Mass ◽  
Spline Function ◽  
Function Analysis ◽  
Young Adolescents ◽  
Body Size Dissatisfaction ◽  
The Relationship

Testing models of biological scaling with mammalian population densities

2003 ◽  
Vol 81 (5) ◽  
pp. 844-851 ◽  
Author(s):  
F Stephen Dobson ◽  
Bertram Zinner ◽  
Marina Silva
Keyword(s):  
Body Size ◽  
Body Mass ◽  
Mammalian Species ◽  
Fractal Dimensions ◽  
Scaling Exponent ◽  
Population Densities ◽  
Biological Variables ◽  
Terrestrial Habitats ◽  
Broad Variety ◽  
The Relationship

Two hypotheses have been suggested to explain the form of interspecific scaling of organismal characteristics to body size, such as the well-known increase in total metabolism with body mass. A hypothesis based on simple Euclidean geometry suggests that the scaling of many biological variables to body size should have a scaling exponent of 2/3, or [Formula: see text]0.667. On the other hand, according to a hypothesis based on fractal dimensions, the relationship between biological variables and body mass should have a scaling exponent of 0.750. We conducted a power analysis of the predicted exponents of scaling under the Euclidean and fractal hypotheses, using average adult body masses and population densities collected from the published literature on mammalian species. The collected data reflect 987 mammal populations from a broad variety of terrestrial habitats. Using statistical methods we determined the sample sizes required to decide between the values of the scaling exponent of the density-to-mass relationship based on the Euclidean (–0.667) and fractal (–0.750) hypotheses. Non-linearities in the dataset and insufficient power plagued our tests of the predictions. We found that mammalian species weighing less than 100 kg had a linear scaling pattern, sufficient power to reveal a difference between the scaling coefficients –0.667 and –0.750, and an actual scaling coefficient of –0.719 (barely significantly different from –0.667 but not from –0.750). Thus, our results support the fractal hypothesis, though the support was not particularly strong, which suggests that the relationship between body mass and population density should have a scaling exponent of –0.750.

scholarly journals Chewing lice (Phthiraptera: Amblycera, Ischnocera) from chukars (Alectoris chukar) from a pheasant farm in Jinacovice (CzechRepublic)

2012 ◽  
Vol 50 (No. 5) ◽  
pp. 213-218 ◽  
Author(s):  
O. Sychra
Keyword(s):  
Czech Republic ◽  
Species Diversity ◽  
The Other ◽  
Mean Intensity ◽  
Chewing Lice ◽  
Alectoris Chukar ◽  
Louse Species ◽  
First Time

One hundred and twenty captive chukars (Alectoris chukar) and other hosts from a pheasant farm in Jinacovice (Czech Republic) were searched for chewing lice from July 2003 to April 2004. Seven species of chewing lice were found on chukars: Amyrsidea perdicis, Menacanthus pallidulus, Menopon gallinae (Amblycera); Goniodes colchici, Lipeurus maculosus, Goniocotes microthorax and Cuclotogaster heterographus (Ischnocera). Except for the last two mentioned species, the other five louse species are recorded for the first time on chukars. The prevalence, mean intensity of infestation and mean abundance of the lice from chukars were recorded. The species diversity and distribution of chewing lice from another eight species of gallinaceous birds kept in the pheasant farm were also recorded.

Size Matters: Body Size is Correlated with Longevity in Speckled Cockroaches (Nauphoeta cineria).

2021 ◽  
Vol 14 ◽  
Author(s):  
Sami Badwan ◽  
James Harper
Keyword(s):  
Body Size ◽  
Body Mass ◽  
Body Length ◽  
Individual Species ◽  
Time Of Death ◽  
Large Size ◽  
The Status ◽  
Males And Females ◽  
The Relationship ◽  
Individual Body

Background: A relationship between body size and longevity has long been appreciated within eukaryotes, especially vertebrates. Introduction: In general, large size is associated with increased longevity among species of mammals and birds but is associated with decreased longevity within individual species such as dogs and mice. In this study, we examined the relationship between measures of individual body size and longevity in a captive population of speckled cockroaches (Nauphoeta cineria). Method: Newly molted adults of both sexes were removed from a mass colony housed in multiple terraria and housed individually with food and water provided ad libitum for the duration of their lifespan. Thrice weekly, the status (i.e. live/dead) of individual cockroaches was noted for the duration of the study. Individuals found dead were weighed and measured to obtain body mass and morphometric measures and the age at the time of death was recorded. The relationship between body size and lifespan was assessed. Result: Contrary to what is commonly seen within vertebrates, large cockroaches were longer-lived than their smaller counterparts. Specifically, body mass, body length and pronotum width were all significantly correlated with the age at death in a mixed population of males and females (n = 94). In addition, we found that the longevity of a historically larger population in terms of both body mass and body length were significantly longer-lived than the population used in this study. Conclusion: These data indicate there is a significant interaction between body size and aging in this species and that increased size results in a survival advantage. There is evidence in the literature indicating that a positive relationship between size and longevity may be common in insects.

The Relationship Between Perceived and Ideal Body Size and Body Mass Index in 3rd-Grade Low Socioeconomic Hispanic Children

2005 ◽  
Vol 21 (4) ◽  
pp. 224-228 ◽  
Author(s):  
Allison Fisher ◽  
Mary Anne Lange ◽  
Virginia Young-Cureton ◽  
Daryl Canham
Keyword(s):  
Body Mass Index ◽  
Body Size ◽  
Body Mass ◽  
Body Satisfaction ◽  
Healthy Weight ◽  
Ideal Self ◽  
Body Images ◽  
Low Socioeconomic ◽  
Self Image ◽  
The Relationship

Very little is known about body satisfaction among minority children. This study examined the relationship between perceived and actual body size and Body Mass Index among 43 low-socioeconomic Hispanic 3rd-graders. Researchers measured participants’ Body Mass Index; students self-reported Perceived Ideal Self Image and Perceived Actual Self Image using Collins’ (1991) pictorial instrument scale of seven child body images that illustrate body weight from very thin to obese. The majority of students chose body images from the scale that depicted a healthy weight for both their Perceived Ideal Self Image and Perceived Actual Self Image. More boys than girls chose underweight as their Perceived Ideal Self Image. Thirty percent of the students were found to be overweight and 30 percent were at risk for being overweight. A small positive correlation between Perceived Actual Self Image and Body Mass Index was found.

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