Ensaios e Ciência: Ciências Biológicas, Agrárias e da Saúde ISSN: Universidade Anhanguera Brasil

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1 Ensaios e Ciência: Ciências Biológicas, Agrárias e da Saúde ISSN: editora@uniderp.br Universidade Anhanguera Brasil Keppeler, Erlei Cassiano; Silva de Souza, Sarah Larissa; Souza da Silva, Enevaldo; Peréa Serrano, Rodrigo Otávio; Medeiros de Souza, Rodrigo; Silva Dantas, Iago Ítalo da; Ferreira Silvério, Jonas; Portela Madeira, Fernanda Rotifera, Eurotatoria, Lecanidae, Lecane monostyla (DADAY, 1897): new occurrence for state of Acre Ensaios e Ciência: Ciências Biológicas, Agrárias e da Saúde, vol. 14, núm. 1, 2010, pp Universidade Anhanguera Campo Grande, Brasil Disponível em: Como citar este artigo Número completo Mais artigos Home da revista no Redalyc Sistema de Informação Científica Rede de Revistas Científicas da América Latina, Caribe, Espanha e Portugal Projeto acadêmico sem fins lucrativos desenvolvido no âmbito da iniciativa Acesso Aberto

2 Ensaios e Ciência Ciências Biológicas, Agrárias e da Saúde Vol. 14, Nº. 1, Ano 2010 ROTIFERA, EUROTATORIA, LECANIDAE, LECANE MONOSTYLA (DADAY, 1897): NEW OCCURRENCE FOR STATE OF ACRE Erlei Cassiano Keppeler erleikeppeler@gmail.com Sarah Larissa Silva de Souza sarahlarissa@hotmail.com Enevaldo Souza da Silva naldo_czs@hotmail.com Rodrigo Otávio Peréa Serrano ropereas@gmail.com Rodrigo Medeiros de Souza rodrigo@ufac.br Iago Ítalo da Silva Dantas iagosilv@hotmail.com Jonas Ferreira Silvério jonsilv@hotmail.com ABSTRACT The Rotifera make up a phylum of microscopic and near-microscopic pseudocoelomate animals (Segers 2004), which show bilateral symmetry. The genus Lecane of the family Lecanidae is common in littoral areas and in eutrophic environments. The zooplankton organisms of Igarapé Jesumira (7º S and 73º W) were collected and measurements of limnological variables were made on September 12, The organisms were caught using pond nets with a 50-μm mesh size and were preserved in 4% formaldehyde. The study of this plankton sampling from Igarapé Jesumira demonstrated the first occurrence of Lecane monostyla in the state of Acre, Brazil. It was found at a temperature of ºC. Keywords: Brazil; Lecane monostyla; temperature. RESUMO O Rotifera constitui um filo de animais microscópicos que são pseudocelomados, e apresentam simetria bilateral. O gênero Lecane da família Lecanidae é comum em áreas litorâneas e em ambientes eutróficos. Os organismos do zooplâncton do Igarapé Jesumira foram coletados usando rede de plâncton com malha de abertura de 50μm e, conservados em solução de formol a concentração de 4%. Como resultado desta coleta foi identificada nas amostras de plâncton do Igarapé Jesumira (7º28 10,2 S e 73º33 54,6 ), a primeira ocorrência de Lecane monostyla no Estado do Acre. Esta espécie foi encontrada à temperatura de 24,40 ºC. Palavras-Chave: Brasil; Lecane monostyla; temperatura. Fernanda Portela Madeira ferlmp@hotmail.com Anhanguera Educacional Ltda. Correspondência/Contato Alameda Maria Tereza, 2000 Valinhos, São Paulo CEP rc.ipade@unianhanguera.edu.br Coordenação Instituto de Pesquisas Aplicadas e Desenvolvimento Educacional - IPADE Comunicação

3 10 Rotifera, Eurotatoria, Lecanidae, Lecane monostyla (DADAY, 1897): new occurrence for state of Acre Northwest Acre State, especially Parque Nacional da Serra do Divisor has long been recognized as a biodiversity hotspot because of its rich biodiversity, but the species of zooplankton present there is totally unknown. Little attention has been paid to the diversity of Rotifera inhabiting the igarapé or bayou in Acre, as the last work was carried out in 2004 (KEPPELER; HARDY, 2004) in Lago Amapá, besides others in the Rio Acre floodplain carried out in preceding years by Sendacz and Melo-Costa (1991) and Keppeler (2003). The Rotifera make up a phylum of microscopic and near-microscopic pseudocoelomate animals (SEGERS, 2004), which show bilateral symmetry. The classification of these taxa includes three groups: Monogononta, Bdelloidea and marine epizoic Seisonacea, part of the parasitic group Acanthocephala. The majority of the three comprise about species, distributed among 29 families and 106 genera (SEGERS, 2002). The organisms belonging to this phylum generally display greater richness and abundance in aquatic ecosystems. They constitute an essential axis of the food chains in continental waters, covering the ecologic niche of small filter feeders. Additionally, they are important indicators of specific ecologic conditions, where they are often utilized in the determination of the trophic state of water bodies (MARGALEF, 1983; WETZEL, 1981). Thus, they are important tools for evaluating ecologic integrity ( health condition of a wellspring). These organisms can be found in many freshwater environments and in moist soil, where they inhabit the thin films of water that are formed around soil particles. The habitat of rotifers may include still water environments, such as lake bottoms, as well as flowing water environments, such as rivers, streams, lakes and bayous. Lecane and Monostyla were considered to be separate genera. However, many authors (SEGERS, 1995) argue that Lecane and Monostyla should be combined as a single genus Lecane. For example, according to Ruttner-Kotisko (1974), species with fused toes were placed in the genus Monostyla. However, because of the intermediate forms they were included in Lecane. The genus Lecane of the family Lecanidae (SEGERS, 2004) is common to shallow environment, littoral areas and frequent in eutrophic environments such as harbors, bayous and river mouths). This genus in the Amazonian region comprises approximately 50 species, based on surveys carried out by Robertson and Hardy (1984), Sendacz and Melo-Costa (1991), Keppeler (2003) and Keppeler and Hardy (2004).

4 present in Rio Tocantins and Rio Nhamundá (Robertson and Hardy 1984). Erlei Cassiano Keppeler et al. 11 The occurrence of this species Lecane monostyla is reported for the first time in Acre State, at coordinates 7º S and 73º W (Figure 1). Rotifers were collected using pond nets (Wetzel and Likens, 1991) with a 50-μm mesh size (SEGERS et al., 1993) and were preserved in 4 % formaldehyde. Figure 1. Study area. The circle and the square on the left indicate the location of Igarapé Jesumira, Acre State. In the laboratory, the zooplankton samples were examined and specimens were photographed using a Bioval binocular microscope, Model L2000A, with a digital camera designed especially for microscopes, with Image Output USB and Max Resolution , Color Max 1.64 million 24-bit color, range of wave adjustment / Windows XP (Professional-SP4) in Acer Aspire Notebook, Intel Celeron. Specimens was deposited in the collection, housed at the Sistem of biodiversity information, University Federal of Acre, Cruzeiro do Sul AC. Lecane monostyla was identified by Koste (1978a; 1978b), and was cited in this nomenclature by Segers (2007). This author noted the existence of some unverifiable records from Europe (Spain and Poland), which state that the presence of this unmistakable warm-water species in Europe is likely and that it is synonymous with Monostyla spinifera Idelson, With respect to the geographical distribution area, this species is considered in the work of Rider (1981) as a warm-stenothermic species with a pantropical distribution. It was recorded for the Alto Paraná in the works of Yoko et al. (2008). In the Amazon, it is

5 12 Rotifera, Eurotatoria, Lecanidae, Lecane monostyla (DADAY, 1897): new occurrence for state of Acre Recently, on September 12, 2008, the occurrence of this species (Figure 2) was verified in tropical waters, in the pelagic region of Igarapé Jesumira, which is part of the floodplain of the Rio Môa, located in the Rio Juruá sub-basin. The physical and chemical conditions, measured with a TROLL 9500 limnological probe, at the collection site were: temperature ºC; ph- 6.27; turbidity NTU; dissolved oxygen mg.l -1 ; and transparency m. The site depth was 0.80 m. Figure 2. Lecane monostyla of Igarapé Jesumira located in Parque Nacional da Serra do Divisor, Acre State ACKNOWLEDGEMENTS This work was supported by ARPA IBAMA-ICM-Bio. We thank the Instituto Brasileiro do Meio Ambiente e dos Recursos Naturais Renováveis (IBAMA) for the expedition license (N ). We are also grateful to Dr. A. Leyva for English editing of the manuscript. REFERENCES JOKO, C.Y.; TÔHA, F.A.L.; MURAKAMI, E.; BONECKER, C.C. Novas ocorrências de Lecane no plâncton de distintos ambientes da planície de inundação do alto rio Paraná (Brasil). Acta Scientiarum, v. 30, n. 1, p , KEPPELER, E.C. Comparative study of the zooplankton composition of two lacustrine ecosystems in southwestern Amazonia. Acta Scientiarum, v. 25, n. 2, p , KEPPELER, E.C.; HARDY, E.R. Abundance and composition of Rotifera in abandoned meander lake (Lago Amapá) in Amazonia. Revista Brasileira de Zoologia, v. 21, n. 2, p , KOSTE, W. Rotatoria Die Rädertiere Mitteleuropas bergründet von Max Voigt-Monogononta. 2. Auflage neubearbeitet von Walter Koste. 1. Berlin: Gebrüder Borntraeger. 238 p., 1978a.. Rotatoria Die Rädertiere Mitteleuropas bergründet von Max Voigt-Monogononta. 2.

6 MARGALEF, R. Limnología. Barcelona: Ediciones Ômega, SA p., Erlei Cassiano Keppeler et al. 13 RIDER, M.D. Some considerations on the geographical distribution of rotifers, Hydrobiologia, v.85, n.3, p , RUTTNER-KOLISKO, A. Plankton Rotifers. Biology and Taxonomy. Binnengewasser, v. 26, n. 1, p , ROBERTSON, B.A.; HARDY, E.R. Zooplankton of Amazonian lakes and rivers; p In: SIOLI, H. (Ed.). The Amazon. Limnology and landscape. Ecology of a mighty tropical river and its basin. Monographiae biological. The Hague. Boston: Dr. W. Junk Publishers, SEGERS, H. Rotifera. The Lecanidae (Monogononta). Guides to the identification of the microinvertebrates of the continental waters of the world. SPB Academics,v.2, p.226, The nomenclature of the Rotifera: annotated checklist of valid family and genus group. Journal of Natural History, v. 36, n. 6, p , Rotifera: Monogononta. In: YULE, C.M.; YONG, H.S. (Ed.). Freshwater Invertebrates of the Malaysian Region. Kuala Lumpur: Academy of Sciences of Malaysia, p Annotated checklist of the rotifers (Phylum Rotifera) with notes on nomenclature, taxonomy and distribution. Zootaxa v. 1564, p , SEGERS, H.; NWADIARO, C.S.; DUMONT, H.J. Rotifera of some lakes in the floodplain of the River Niger (Imo State, Nigeria). Hydrobiologia, v. 250, p , SENDACZ, S.; MELO-COSTA, S. Caracterização do Zooplâncton do Rio Acre e Lagos Lua Nova, Novo Andirá e Amapá (Amazônia, Brasil). Revista Brasileira de Biologia, v. 51, n. 2, p , WETZEL, R.G. Limnología. Barcelona: Ediciones Ômega. 679p., WETZEL, R.G.; LIKENS, G.E. Limnological analysis. New York: W. B. Saunders Company. 391 p., Erlei Cassiano Keppeler Biologist pela University Federal and Master Science by University Federal of Acre. She is working in Campus Floresta. Colony São Francisco, Gleba. CEP Cruzeiro do Sul, AC, Brazil. Sarah Larissa Silva de Souza Enevaldo Souza da Silva Rodrigo Otávio Peréa Serrano University Federal of Acre, Multidisciplinar Center, Campus Floresta. Colônia São Francisco, Gleba. CEP Cruzeiro do Sul, AC, Brazil.

7 14 Rotifera, Eurotatoria, Lecanidae, Lecane monostyla (DADAY, 1897): new occurrence for state of Acre Rodrigo Medeiros de Souza Professor of the University Federal of Acre, Multidisciplinar Center, Campus Floresta. Colônia São Francisco, Gleba. Cruzeiro do Sul, AC, Brazil. Student of Master in Sciences. University city, São Paulo, SP, Brazil. Iago Ítalo da Silva Dantas Jonas Ferreira Silvério Fernanda Portela Madeira Student of Biological Sciences Graduate. Campus Floresta. Colony São Francisco, Gleba. CEP Cruzeiro do Sul, AC, Brazil.