Spatial microdistribution of two introduced dung beetle species Digitonthophagus gazella (F.) and Euniticellus intermedius (Reiche) (Coleoptera Scarabaeidae) in an arid region of Northern Mexico (Durango, Mexico)
The introduced dung beetle species Digitonthophagus gazella (F.) and Euoniticellus intermedias (Reiche) have become the dominant species into the Scarabaeinae guild of the Mapimí región (Durango, México). The distributions of these two species in an apparently homogeneous environment was analyzed th...
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| Formaat: | Online |
| Taal: | eng |
| Gepubliceerd in: |
Instituto de Ecología, A.C.
1997
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| Online toegang: | https://azm.ojs.inecol.mx/index.php/azm/article/view/1740 |
| _version_ | 1799770264643305472 |
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| author | Lobo, Jorge M. |
| author_facet | Lobo, Jorge M. |
| author_sort | Lobo, Jorge M. |
| collection | AZM |
| description | The introduced dung beetle species Digitonthophagus gazella (F.) and Euoniticellus intermedias (Reiche) have become the dominant species into the Scarabaeinae guild of the Mapimí región (Durango, México). The distributions of these two species in an apparently homogeneous environment was analyzed through transects of artificially placed dung pats and pitfall traps baited with cow dung. Both species showed aggregated distnbutions. Aggregation ocurred at high, modérate and low densities and was not affected by emigration, The observed Intraspecific aggregation was probably due to immigration processes: repeated dung beetle selection for the same dung pats and selection of dung pats with larger initial populations. The spatial negativa association between D. gazella and E. intermedius observed at this spatial scale was probably due to differential emigration rates. The rate of emigration of both species depended on the number of the conspecifics into a dung pat, but not on the number of beetles from the other species. We conclude that the competitive interactions among individuáis intraspecifically aggregated ükely ied to differential emigration rafes and caused the observed microspatial segregation. |
| format | Online |
| id | azm-article-1740 |
| institution | Acta Zoológica Mexicana |
| language | eng |
| publishDate | 1997 |
| publisher | Instituto de Ecología, A.C. |
| record_format | ojs |
| spelling | azm-article-17402022-12-13T01:38:38Z Spatial microdistribution of two introduced dung beetle species Digitonthophagus gazella (F.) and Euniticellus intermedius (Reiche) (Coleoptera Scarabaeidae) in an arid region of Northern Mexico (Durango, Mexico) Spatial microdistribution of two introduced dung beetle species Digitonthophagus gazella (F.) and Euniticellus intermedius (Reiche) (Coleoptera Scarabaeidae) in an arid region of Northern Mexico (Durango, Mexico) Lobo, Jorge M. Spatial distribution aggregation covariation dung beetles introduced species and región Distribución espacial agregación covariación escarabajos del estiércol especies introducidas región árida The introduced dung beetle species Digitonthophagus gazella (F.) and Euoniticellus intermedias (Reiche) have become the dominant species into the Scarabaeinae guild of the Mapimí región (Durango, México). The distributions of these two species in an apparently homogeneous environment was analyzed through transects of artificially placed dung pats and pitfall traps baited with cow dung. Both species showed aggregated distnbutions. Aggregation ocurred at high, modérate and low densities and was not affected by emigration, The observed Intraspecific aggregation was probably due to immigration processes: repeated dung beetle selection for the same dung pats and selection of dung pats with larger initial populations. The spatial negativa association between D. gazella and E. intermedius observed at this spatial scale was probably due to differential emigration rates. The rate of emigration of both species depended on the number of the conspecifics into a dung pat, but not on the number of beetles from the other species. We conclude that the competitive interactions among individuáis intraspecifically aggregated ükely ied to differential emigration rafes and caused the observed microspatial segregation. Digitonthophagus gazella (F.) y Euoniticellus intermedias (Reiche) son dos especies de escarabajos coprófagos que fueron introducidos en el continente americano y, que en la actualidad, constituyen las especies dominantes dentro del gremio en Mapimí (Durango, México). Se analizaron las distribuciones de ambas especies en un ambiente aparentemente homogéneo mostrado a lo largo de transectos constituidos por boñigas de vaca depositadas artificialmente y por trampas pitfall. Ambas especies mostraran distribuciones agregadas, las cuales se presentan a densidades bajas, medias y altas, así como cuando hay o no hay emigración. La agregación intraespecífica observada probablemente se deba a una cierta preferencia de los procesos de inmigración hacia las boñigas (y trampas) seleccionadas repetidamente asi como por aquellas boñigas o trampas con mayor número Inicial de individuos. A esta escala espacial la correlación negativa mostrada entre D. gazella and E. intermedius se debe probablemente a tasas de emigración diferenciales. Esta tasa de emigración para cada especie depende del número de individuos de la misma especie que llegan al excremento y no del número de individuos de la otra especie. Concluimos que las interacciones competitivas entre individuos intraespecíficamente agregados son muy probablemente las causas de la emigración diferencial y de la segregación microespacial observada de estas dos especies en esta región. Instituto de Ecología, A.C. 1997-08-14 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Original articles Artículos originales application/pdf https://azm.ojs.inecol.mx/index.php/azm/article/view/1740 10.21829/azm.1997.71711740 ACTA ZOOLÓGICA MEXICANA (N.S.); No. 71 (1997); 17-32 ACTA ZOOLÓGICA MEXICANA (N.S.); Núm. 71 (1997); 17-32 2448-8445 0065-1737 eng https://azm.ojs.inecol.mx/index.php/azm/article/view/1740/1854 Derechos de autor 2018 Acta Zoológica Mexicana (parte1) http://creativecommons.org/licenses/by-nc-sa/4.0 |
| spellingShingle | Lobo, Jorge M. Spatial microdistribution of two introduced dung beetle species Digitonthophagus gazella (F.) and Euniticellus intermedius (Reiche) (Coleoptera Scarabaeidae) in an arid region of Northern Mexico (Durango, Mexico) |
| title | Spatial microdistribution of two introduced dung beetle species Digitonthophagus gazella (F.) and Euniticellus intermedius (Reiche) (Coleoptera Scarabaeidae) in an arid region of Northern Mexico (Durango, Mexico) |
| title_full | Spatial microdistribution of two introduced dung beetle species Digitonthophagus gazella (F.) and Euniticellus intermedius (Reiche) (Coleoptera Scarabaeidae) in an arid region of Northern Mexico (Durango, Mexico) |
| title_fullStr | Spatial microdistribution of two introduced dung beetle species Digitonthophagus gazella (F.) and Euniticellus intermedius (Reiche) (Coleoptera Scarabaeidae) in an arid region of Northern Mexico (Durango, Mexico) |
| title_full_unstemmed | Spatial microdistribution of two introduced dung beetle species Digitonthophagus gazella (F.) and Euniticellus intermedius (Reiche) (Coleoptera Scarabaeidae) in an arid region of Northern Mexico (Durango, Mexico) |
| title_short | Spatial microdistribution of two introduced dung beetle species Digitonthophagus gazella (F.) and Euniticellus intermedius (Reiche) (Coleoptera Scarabaeidae) in an arid region of Northern Mexico (Durango, Mexico) |
| title_sort | spatial microdistribution of two introduced dung beetle species digitonthophagus gazella (f.) and euniticellus intermedius (reiche) (coleoptera scarabaeidae) in an arid region of northern mexico (durango, mexico) |
| url | https://azm.ojs.inecol.mx/index.php/azm/article/view/1740 |
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