Phenotypic variation and sexual size dimorphism in dichroplus elongatus (Orthoptera:Acrididae)
Patterns of body size evolution are of particular interest because body size can affect virtually all the physiological and life history traits of an organism. Sexual size dimorphism (SSD), a difference in body size between males and females, is a widespread phenomenon in insects. Much of the variat...
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todo:paper_0046225X_v44_n4_p1240_Rosetti2023-10-03T14:52:13Z Phenotypic variation and sexual size dimorphism in dichroplus elongatus (Orthoptera:Acrididae) Rosetti, N. Remis, M.I. fecundity morphometric trait Orthoptera body size environmental conditions fecundity grasshopper latitudinal gradient life history trait morphometry phenotypic plasticity physiological response sexual dimorphism Argentina Brazil Chile Uruguay Acrididae Dichroplus elongatus Hexapoda Orthoptera Schistocerca americana anatomy and histology animal Argentina body size Caelifera female genetics growth, development and aging male Orthoptera phenotype physiology reproduction sexual development Animals Argentina Body Size Female Grasshoppers Male Orthoptera Phenotype Reproduction Sex Characteristics Patterns of body size evolution are of particular interest because body size can affect virtually all the physiological and life history traits of an organism. Sexual size dimorphism (SSD), a difference in body size between males and females, is a widespread phenomenon in insects. Much of the variation in SSD is genetically based and likely due to differential selection acting on males and females. The importance of environmental variables and evolutionary processes affecting phenotypeic variation in both sexes may be useful to gain insights into insect ecology and evolution. Dichroplus elongatus Giglio-Tos is a South American grasshopper widely distributed throughout Argentina, Uruguay, most of Chile, and southern Brazil. In this study, we analyzed 122 adult females of D. elongatus collected in eight natural populations from central-east Argentina. Females show large body size variation among the analyzed populations and this variation exhibits a strong relationship with fecundity. Our results have shown that larger females were more fecund than smaller ones. We found that ovariole number varied along a latitudinal gradient, with higher ovariole numbers in populations from warmer locations. A considerable female-biased SSD was detected. SSD for three analyzed morphometric traits scaled isometrically. However, SSD for thorax length displayed a considerable variation across the studied area, indicating a larger relative increase in female size than in male size in warmer environmental conditions. © The Authors 2015. Published by Oxford University Press on behalf of Entomological Society of America. Fil:Rosetti, N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Remis, M.I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0046225X_v44_n4_p1240_Rosetti |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
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R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
fecundity morphometric trait Orthoptera body size environmental conditions fecundity grasshopper latitudinal gradient life history trait morphometry phenotypic plasticity physiological response sexual dimorphism Argentina Brazil Chile Uruguay Acrididae Dichroplus elongatus Hexapoda Orthoptera Schistocerca americana anatomy and histology animal Argentina body size Caelifera female genetics growth, development and aging male Orthoptera phenotype physiology reproduction sexual development Animals Argentina Body Size Female Grasshoppers Male Orthoptera Phenotype Reproduction Sex Characteristics |
| spellingShingle |
fecundity morphometric trait Orthoptera body size environmental conditions fecundity grasshopper latitudinal gradient life history trait morphometry phenotypic plasticity physiological response sexual dimorphism Argentina Brazil Chile Uruguay Acrididae Dichroplus elongatus Hexapoda Orthoptera Schistocerca americana anatomy and histology animal Argentina body size Caelifera female genetics growth, development and aging male Orthoptera phenotype physiology reproduction sexual development Animals Argentina Body Size Female Grasshoppers Male Orthoptera Phenotype Reproduction Sex Characteristics Rosetti, N. Remis, M.I. Phenotypic variation and sexual size dimorphism in dichroplus elongatus (Orthoptera:Acrididae) |
| topic_facet |
fecundity morphometric trait Orthoptera body size environmental conditions fecundity grasshopper latitudinal gradient life history trait morphometry phenotypic plasticity physiological response sexual dimorphism Argentina Brazil Chile Uruguay Acrididae Dichroplus elongatus Hexapoda Orthoptera Schistocerca americana anatomy and histology animal Argentina body size Caelifera female genetics growth, development and aging male Orthoptera phenotype physiology reproduction sexual development Animals Argentina Body Size Female Grasshoppers Male Orthoptera Phenotype Reproduction Sex Characteristics |
| description |
Patterns of body size evolution are of particular interest because body size can affect virtually all the physiological and life history traits of an organism. Sexual size dimorphism (SSD), a difference in body size between males and females, is a widespread phenomenon in insects. Much of the variation in SSD is genetically based and likely due to differential selection acting on males and females. The importance of environmental variables and evolutionary processes affecting phenotypeic variation in both sexes may be useful to gain insights into insect ecology and evolution. Dichroplus elongatus Giglio-Tos is a South American grasshopper widely distributed throughout Argentina, Uruguay, most of Chile, and southern Brazil. In this study, we analyzed 122 adult females of D. elongatus collected in eight natural populations from central-east Argentina. Females show large body size variation among the analyzed populations and this variation exhibits a strong relationship with fecundity. Our results have shown that larger females were more fecund than smaller ones. We found that ovariole number varied along a latitudinal gradient, with higher ovariole numbers in populations from warmer locations. A considerable female-biased SSD was detected. SSD for three analyzed morphometric traits scaled isometrically. However, SSD for thorax length displayed a considerable variation across the studied area, indicating a larger relative increase in female size than in male size in warmer environmental conditions. © The Authors 2015. Published by Oxford University Press on behalf of Entomological Society of America. |
| format |
JOUR |
| author |
Rosetti, N. Remis, M.I. |
| author_facet |
Rosetti, N. Remis, M.I. |
| author_sort |
Rosetti, N. |
| title |
Phenotypic variation and sexual size dimorphism in dichroplus elongatus (Orthoptera:Acrididae) |
| title_short |
Phenotypic variation and sexual size dimorphism in dichroplus elongatus (Orthoptera:Acrididae) |
| title_full |
Phenotypic variation and sexual size dimorphism in dichroplus elongatus (Orthoptera:Acrididae) |
| title_fullStr |
Phenotypic variation and sexual size dimorphism in dichroplus elongatus (Orthoptera:Acrididae) |
| title_full_unstemmed |
Phenotypic variation and sexual size dimorphism in dichroplus elongatus (Orthoptera:Acrididae) |
| title_sort |
phenotypic variation and sexual size dimorphism in dichroplus elongatus (orthoptera:acrididae) |
| url |
http://hdl.handle.net/20.500.12110/paper_0046225X_v44_n4_p1240_Rosetti |
| work_keys_str_mv |
AT rosettin phenotypicvariationandsexualsizedimorphismindichropluselongatusorthopteraacrididae AT remismi phenotypicvariationandsexualsizedimorphismindichropluselongatusorthopteraacrididae |
| _version_ |
1807324471931961344 |