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Abstract:

We studied the geographic variation of three morphometric characters in relation to body size in two South American grasshoppers (Acrididae), Dichroplus vittatus Bruner and D. pratensis Bruner to test Allen's rule in these ectotherms. Since both species follow the converse to Bergmann's rule owing to latitudinal and/or altitudinal variation in time available for growth and reproduction, geographic variation in body size proportions of protruding parts may obey to differential allometric growth in different geographic areas. Alternatively, it could reflect true Allenian variation related to thermoregulation. Body proportions were studied by correlation/regression analyses with geographic and climatic variables. In D. pratensis, body proportions increased with latitude and decreased with altitude. These results probably obey to the effects of water balance and seasonality on final body size, and on the allometric growth of the three studied characters not being related to thermoregulation. In D. vittatus, a generally non-significant trend towards the decrease of the mean proportions of all three characters with increasing latitude was observed. Nevertheless, also in this species, it is probable that the environmental gradient responds to seasonality factors (although not to water balance) that affect the length of growing season and, in consequence, body size and its allometric relationships. We conclude that the regularities in the geographic distribution of body proportions of D. pratensis and D. vittatus do not follow Allen's rule in the sense of thermoregulation, and result from variables that determine growing season length and the allometric growth of different body parts.

Registro:

Documento: Artículo
Título:A test of Allen's rule in ectotherms: The case of two south American Melanopline Grasshoppers (Orthoptera: Acrididae) with partially overlapping geographic ranges
Autor:Bidau, C.J.; Martí, D.A.
Filiación:Instituto Oswaldo Cruz, FIOCRUZ, Av. Brasil 4365, Manguinhos, Rio de Janeiro, 21045-900 RJ, Brazil
Consejo Nacional de Investigaciones Científicas Y Técnicas, Buenos Aires, Argentina
Facultad de Ciencias Exactas, Químicas Y Naturales, Universidad Nacional de Misiones, Félix de Azara 1552, 3300, Posadas, Argentina
Idioma: Inglés
Palabras clave:Allometry; Body proportion; Body size; Dichroplus; Geographic variation; altitude; animal; Argentina; article; body size; ecosystem; female; geography; grasshopper; histology; male; physiology; reproduction; season; sex difference; species difference; thermoregulation; Altitude; Animals; Argentina; Body Size; Body Temperature Regulation; Ecosystem; Female; Geography; Grasshoppers; Male; Reproduction; Seasons; Sex Factors; Species Specificity; Acrididae; Dichroplus; Dichroplus pratensis; Dichroplus vittatus; Orthoptera; Schistocerca americana
Año:2008
Volumen:37
Número:4
Página de inicio:370
Página de fin:380
Título revista:Neotropical Entomology
Título revista abreviado:Neotrop. Entomol.
ISSN:1519566X
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1519566X_v37_n4_p370_Bidau

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Citas:

---------- APA ----------
Bidau, C.J. & Martí, D.A. (2008) . A test of Allen's rule in ectotherms: The case of two south American Melanopline Grasshoppers (Orthoptera: Acrididae) with partially overlapping geographic ranges. Neotropical Entomology, 37(4), 370-380.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1519566X_v37_n4_p370_Bidau [ ]
---------- CHICAGO ----------
Bidau, C.J., Martí, D.A. "A test of Allen's rule in ectotherms: The case of two south American Melanopline Grasshoppers (Orthoptera: Acrididae) with partially overlapping geographic ranges" . Neotropical Entomology 37, no. 4 (2008) : 370-380.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1519566X_v37_n4_p370_Bidau [ ]
---------- MLA ----------
Bidau, C.J., Martí, D.A. "A test of Allen's rule in ectotherms: The case of two south American Melanopline Grasshoppers (Orthoptera: Acrididae) with partially overlapping geographic ranges" . Neotropical Entomology, vol. 37, no. 4, 2008, pp. 370-380.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1519566X_v37_n4_p370_Bidau [ ]
---------- VANCOUVER ----------
Bidau, C.J., Martí, D.A. A test of Allen's rule in ectotherms: The case of two south American Melanopline Grasshoppers (Orthoptera: Acrididae) with partially overlapping geographic ranges. Neotrop. Entomol. 2008;37(4):370-380.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1519566X_v37_n4_p370_Bidau [ ]