Intraspecific variation of body size in a gamasid mite Laelaps clethrionomydis: environment, geography and host dependence

2015 ◽  
Vol 114 (10) ◽  
pp. 3767-3774 ◽  
Author(s):  
Natalia P. Korallo-Vinarskaya ◽  
Maxim V. Vinarski ◽  
Irina S. Khokhlova ◽  
Georgy I. Shenbrot ◽  
Boris R. Krasnov
Keyword(s):  
Body Size ◽  
Intraspecific Variation ◽  
Gamasid Mite

Body size, not age, predicts parasite load in Clark’s Spiny Lizards (Sceloporus clarkii)

2019 ◽  
Vol 97 (3) ◽  
pp. 220-224 ◽  
Author(s):  
H.V. Watkins ◽  
G. Blouin-Demers
Keyword(s):  
Body Size ◽  
Surface Area ◽  
Intraspecific Variation ◽  
Wild Population ◽  
Parasite Load ◽  
Older Individuals ◽  
Fundamental Goal ◽  
Males And Females ◽  
Ectoparasite Load

Determining the factors that influence parasite load is a fundamental goal of parasitology. Body size often influences parasite load in reptiles, but it is unclear whether higher levels of parasitism are a result of greater surface area of individuals (a function of size) or of longer periods of exposure to parasites (a function of age). Using skeletochronology in a wild population of Clark’s Spiny Lizards (Sceloporus clarkii Baird and Girard, 1852), we tested the hypotheses that (i) larger individuals have higher parasite loads due to increased surface area available for colonization by parasites and their vectors and that (ii) older individuals have higher parasite loads because they have had longer exposure to parasites and their vectors. Males harboured more ectoparasites than females. Males and females differed in how body size influenced chigger (Acari: Trombiculidae) load; larger males harboured more chiggers than smaller males, but this was not the case in females. Age did not affect ectoparasite load in either sex. These results emphasize the importance of disentangling the effects of size and age in models of parasitism to gain a clearer understanding of intraspecific variation in parasite load.

Intraspecific variation in body size of bumblebee workers influences anti‐predator behaviour

2019 ◽  
Vol 89 (2) ◽  
pp. 658-669 ◽  
Author(s):  
Sabrina S. Gavini ◽  
Carolina Quintero ◽  
Mariana Tadey
Keyword(s):  
Body Size ◽  
Intraspecific Variation ◽  
Predator Behaviour

Intraspecific variation in reproductive potential with maternal body size in Gulf killifish Fundulus grandis

Aquaculture ◽  
2013 ◽  
Vol 384-387 ◽  
pp. 134-139 ◽  
Author(s):  
Joshua T. Patterson ◽  
Taylor G. Allgood ◽  
Christopher C. Green
Keyword(s):  
Body Size ◽  
Intraspecific Variation ◽  
Reproductive Potential ◽  
Maternal Body ◽  
Fundulus Grandis

Allometry and sexual dimorphism in the lung morphology of prairie rattlesnakes, Crotalus viridis viridis

1999 ◽  
Vol 20 (4) ◽  
pp. 377-389 ◽  
Author(s):  
J. Scott Keogh ◽  
V. Wallach
Keyword(s):  
Body Size ◽  
Sexual Dimorphism ◽  
Intraspecific Variation ◽  
Relative Length ◽  
Single Population ◽  
Crotalus Viridis ◽  
Lung Morphology ◽  
Body Sizes ◽  
Vascular Component

AbstractWe quantified sexual dimorphism and allometric changes in the lung morphology of 160 juvenile and adult specimens of prairie rattlesnake, Crotalus viridis viridis, from a single population. In virtually all lung components, those of males are located more posteriorly than are those of females of the same body size. Males display a longer vascular component than females but there is no sexual dimorphism in size of the avascular component. Thus, males generally have longer lungs than do females at all body sizes. With increasing body size, the lung components are found more anteriorly, relative length of the vascular lung decreases, and relative length of the avascular lung increases in both sexes. However, total lung length increases isometrically with body size. These sexual and allometric differences suggest that intraspecific variation should be taken into account when lung size characters are used in snake systematic studies.

Female polymorphism in Chilothrips strobilus (Thysanoptera: Thripidae), with the first description of the male

Zootaxa ◽  
2017 ◽  
Vol 4358 (1) ◽  
pp. 193 ◽  
Author(s):  
YANZE CUI ◽  
JINGHUI XI ◽  
JUN WANG
Keyword(s):  
Body Size ◽  
Sexual Dimorphism ◽  
Intraspecific Variation ◽  
Abdominal Segment ◽  
Wing Length ◽  
Northeastern China ◽  
Liaoning Province ◽  
Female Polymorphism ◽  
Small Genus ◽  
Different Parts

Polymorphism and sexual dimorphism are common in insects. Thrips have been reported to exhibit intraspecific variation in body size, color and wing length (Mound 2005), also sexual dimorphism in abdominal pore plates, antennal sensoria and fore leg armature (Tyagi et al. 2008). Chilothrips Hood is a small genus that currently comprises seven species (ThripsWiki 2017), three from USA, one from Japan, and three from China. No male has been reported in the three species from China, C. strobilus, C. jiuxiensis and C. hangzhouensis (Hu & Feng 2015), and C. strobilus was described on three female specimens from cones of Pinus in Liaoning Province, northeastern China (Tong & Zhang, 1994). Recently, we have surveyed different parts of northeastern China and collected many male individuals of C. strobilus. We have observed that this species shows sexual dimorphism in mouth cone length, and remarkable variation in form of abdominal segment X among females. 

scholarly journals INTRASPECIFIC VARIATION IN THE REPRODUCTIVE EFFORT AMONG THREE POPULATIONS OF AN INTERTIDAL GASTROPOD, Nerita japonica (Dunker)

2012 ◽  
Vol 8 (1) ◽  
pp. 1
Author(s):  
Carolus Paruntu
Keyword(s):  
Body Size ◽  
Intraspecific Variation ◽  
Rocky Shore ◽  
Reproductive Effort ◽  
Dry Weight ◽  
Mature Gonad ◽  
Adult Body ◽  
Intertidal Gastropod ◽  
Intertidal Habitats ◽  
The Relationship

The aim of the present research is to figure out the reproductive effort of Nerita japonica occurring in three different intertidal habitats of Amakusa Shimoshima Island, western Kyushu, Japan. Rocky shore population and other two stony shore populations (the upper stony shore and the lower stony shore) were described based on: (a) its mean mature gonad dry weight, (b) reproductive effort, and (c) the relationship between reproductive effort and body size. Data recorded in the period of spawning season. The results revealed that there were mean mature gonad dry weight and reproductive effort variations among three snail populations. Mean mature gonad dry weight and reproductive effort were larger for the Rocky shore population, intermediate for lower stone shore population, and smaller for the upper stone shore population. In one out of three populations, i.e., the upper stone shore population, reproductive effort of mature females increased significantly with an increase in body size. The data showed that reproductive effort is related to adult body size of N. japonica. There was an intraspecific variation in reproductive effort among three populations of N. japonica over even small geographic distances. Keywords: mature body size, mature gonad dry weight, reproductive effort, intraspecific variation, Nerita japonica.  Variasi Indeks Kematangan Gonad Interspesies pada Tiga Populasi Gastropoda Intertidal, Nerita japonica (Dunder)) Penelitian ini bertujuan untuk mendeskripsikan indeks kematangan gonad dari gastropoda intertidal, Nerita japonica yang hidup di tiga habitat yang berbeda di Pulau Shimoshima Amakusa, Kyushu bagian barat, Jepang. Parameter yang diamati pada setiap populasi adalah: (a) nilai rata-rata berat kering gonad matang, (b) indeks kematangan gonad, dan (c) hubungan antara indeks kematangan gonad dan ukuran tubuh. Data dicatat pada periode musim pemijahan. Ketiga populasi memperlihatkan nilai rata-rata berat kering gonad yang matang dan indeks kematangan gonad yang berbeda. Populasi pantai berbatu memiliki nilai rata-rata berat kering matang gonad dan indeks kematangan gonad yang paling besar, diikuti oleh nilai dari populasi pantai berbatu bagian bawah dan populasi pantai berbatu bagian atas memiliki nilai yang paling kecil. Selanjutnya, satu dari tiga populasi, yaitu populasi pantai berbatu bagian atas memperlihatkan indeks kematangan gonad dari individu-individu betina N. japonica berhubungan dengan ukuran tubuhnya. Sekalipun indeks kematangan gonad dari individu-individu N. japonica meningkat secara signifikan dengan bertambahnya ukuran tubuh, namun terdapat variasi intraspesifik pada N. japonica dalam hal indeks kematangan gonad menurut habitat walaupun secara geografis berdekatan.Kata kunci: ukuran tubuh matang kelamin, berat kering gonad matang, indeks kematangan gonad, variasi intraspesifik, Nerita japonica.

Intraspecific variation of body size in fleas: effects of host sex and flea phenology

2020 ◽  
Vol 119 (10) ◽  
pp. 3211-3220
Author(s):  
Sergei G. Medvedev ◽  
Nikolai V. Sedikhin ◽  
Boris R. Krasnov
Keyword(s):  
Body Size ◽  
Intraspecific Variation ◽  
Host Sex

Brontostoma lilloi Carpintero, 1980, a junior synonym of B. rubrovenosum (Stål, 1860) (Hemiptera: Heteroptera: Reduviidae)

Zootaxa ◽  
2019 ◽  
Vol 4614 (1) ◽  
pp. 180
Author(s):  
HÉLCIO R. GIL-SANTANA ◽  
DIEGO L. CARPINTERO
Keyword(s):  
Body Size ◽  
Sexual Dimorphism ◽  
Geographic Variation ◽  
Intraspecific Variation ◽  
New World ◽  
Junior Synonym

There are 22 genera and more than 100 described species of Ectrichodiinae in the New World (Gil-Santana et al. 2015). Intraspecific variation in coloration and body size have been recorded in several species of the subfamily. These characteristics can occur in the same population or can suggest geographic variation of the same species (Wygodzinsky 1951, Dougherty 1995, Gil-Santana & Baena 2009, Gil-Santana et al. 2013). Sexual dimorphism is also common: females are almost always more or less larger than males, frequently have thicker fore femora and smaller eyes and ocelli (Dougherty 1995). 

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