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Effect of Environmental Variables on the Distribution of Two Freshwater Crabs (Anomura: Aeglidae)

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AbstractWe evaluate whether the abundance of the freshwater crabs Aegla itacolomiensis and A. platensis is related to any or all of 11 environmental variables. We sampled 205 Surber samples (33 × 33 cm) in a stream five meters wide in southern Brazil. For each Surber sample we obtained measures of flow velocity, depth, type of substrate, and availability of coarse particulate organic matter. The relationships between abundances of the two species and the environmental variables were assessed by regression trees. Only 2 of the 11 environmental variables were important in describing the abundances of the two species, both of them related to availability of coarse particulate organic matter. The abundance of Aegla itacolomiensis was related positively to quantity of fragmented leaves and, to a lesser degree, to quantity of twigs. For the abundance of A. platensis, quantity of twigs, followed by fragmented leaves, were the most important environmental factors. The quantity of recently fallen, unfragmented leaves was unimportant. We conclude that the two species of Aegla select locations with abundant old plant fragments that are usually colonized by fungi and bacteria. This conclusion is corroborated by previous studies indicating that Aegla spp. feed mostly on plant fragments.

Affiliations: 1: a(FB, ASM: corresponding author) Departamento de Ecologia, Instituto de Biociências, Universidade Federal do Rio Grande do Sul. Caixa Postal 15007, Porto Alegre, Rio Grande do Sul 91501-970, Brazil (; ; 2: b(RG, GBB) Departamento de Zoologia, Instituto de Biociências, Universidade Federal do Rio Grande do Sul. Caixa Postal 15014, Porto Alegre, Rio Grande do Sul 91501-970, Brazil (;


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1. Bond-Buckup G. 2003 "Familia Aeglidae." pp. 21-116. In, G. A. S. Melo (ed.), Manual de Identificaão dos Crustacea Decapoda de gua doce do Brasil. Editora Loyola, São Paulo
2. Bond-Buckup G. , Buckup L. 1994 "A famlia Aeglidae (Crustacea, Decapoda, Anomura)." Arquivos de Zoologia Vol 32 159 346
3. Bueno A. A P. , Bond-Buckup G. 2004 "Natural diet of Aegla platensis Schmitt and Aegla ligulata Bond-Buckup & Buckup (Crustacea, Decapoda, Aeglidae) from Brazil." Acta Limnologica Brasiliensia Vol 16 115 127
4. Castro-Souza T. , Bond-Buckup G. 2004 "O nicho trfico de duas espcies simptricas de Aegla Leach (Crustacea, Aeglidae) no tributrio da Bacia do Rio Pelotas, Rio Grande do Sul, Brasil." Revista Brasileira de Zoologia Vol 21 805 813
5. Colpo K. D. , Ribeiro L. O. , Santos S. 2005 "Population biology of the freshwater anomuran Aegla longirostri (Aeglidae) from south Brazilian streams." Journal of Crustacean Biology Vol 25 495 499
6. De'Ath G. , Fabricius K. E. 2000 "Classification and regression trees: a powerful yet simple technique for ecological data analysis." Ecology Vol 81 3178 3192
7. Egglishaw H. J. 1964 "The distributional relationship between the bottom fauna and plant detritus in streams." Journal of Animal Ecology Vol 33 463 476
8. Graa M. A S. 2001 "The role of invertebrates on leaf litter decomposition in streams a review." International Review of Hydrobiology Vol 86 383 393
9. Graa M. A S. , Cressa C. , Gessner M. O. , Feio M. J. , Callies K. A. , Barrios C. 2001 "Food quality, feeding preferences, survival and growth of shredders from temperate and tropical streams." Freshwater Biology Vol 46 947 957
10. Greco L. S L. , Viau V. , Lavolpe M. , Bond-Buckup G. , Rodriguez E. M. 2004 "Juvenile hatching and maternal care in Aegla uruguayana (Anomura, Aeglidae)." Journal of Crustacean Biology Vol 24 309 313
11. Huamantinco A. A. , Nessimian J. L. 1999 "Estrutura e distribuião espacial da comunidade de larvas de Trichoptera (Insecta) em um tributrio de primeira ordem do Rio Paquequer, Terespolis, RJ." Acta Limnologica Brasiliensia Vol 11 1 16
12. Kelly D. W. , Dick J. T A. , Montgomery W. I. 2002 "The functional role of Gammarus (Crustacea, Amphipoda): shredders, predators, or both?." Hydrobiologia Vol 485 199 203
13. March J. G. , Benstead J. P. , Pringle C. M. , Ruebel M. W. 2001 "Linking shrimp assemblages with rates of detrital processing along an elevational gradient in a tropical stream." Canadian Journal of Fisheries and Aquatic Science Vol 58 470 478
14. Prez-Losada M. , Bond-Buckup G. , Jara C. G. , Crandall K. A. 2004 "Molecular systematics and biogeography of the southern South American freshwater crabs Aegla (Decapoda: Anomura: Aeglidae) using multiple heuristics tree search approaches." Systematic Biology Vol 53 767 780
15. Prez-Losada M. , Jara C. G. , Bond-Buckup G. , Crandall K. A. 2002a "Conservation phylogenetics of Chilean freshwater crabs Aegla (Anomura, Aeglidae): assigning priorities for aquatic habitat protection." Biological Conservation Vol 105 345 353
16. Prez-Losada M. , Jara C. G. , Bond-Buckup G. , Crandall K. A. 2002b "Phylogenetic relationships among the species of Aegla (Anomura: Aeglidae) freshwater crabs from Chile." Journal of Crustacean Biology Vol 22 304 313
17. R Development Core Team 2006 "R: A language and environment for statistical computing." R Foundation for Statistical Computing, Vienna, Austria. ISBN 3-900051-07-0, URL
18. Richardson J. S. 1992 "Food, microhabitat, or both? Macroinvertebrate use of leaf accumulations in a montane stream." Freshwater Biology Vol 27 169 176
19. Rodrigues W. , Hebling J. N. 1978 "Estudos biolgicos em Aegla perobae Hebling and Rodrigues, 1977 (Decapoda: Anomura)." Revista Brasileira de Biologia Vol 38 383 390
20. Schmitt W. L. 1942 "The species of Aegla, endemic South American fresh-water crustaceans." Proceedings of the United States National Museum Vol 91 431 524
21. Therneau T. M. , Atkinson B. 2006 "rpart: Recursive Partitioning." R port by B. Ripley. R package version 3.1-34. URL
22. Therneau T. M. , Atkinson B. 1997 "An introduction to recursive partitioning using the rpart routines." Technical Report 61, Mayo Clinic, Section of Biostatistics. Rochester, Minnesota
23. Usio N. , Townsend C. R. 2001 "The significance of the crayfish Paranephrops zealandicus as shredders in a New Zealand headwater stream." Journal of Crustacean Biology Vol 21 354 359
24. Whitledge G. W. , Rabeni C. F. 1997 "Energy sources and ecological role of crayfishes in an Ozark stream: insights from stable isotopes and gut analysis." Canadian Journal of Fisheries and Aquatic Science Vol 54 2555 2563

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