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Check List 8(3): 421-425, 2012 © 2012 Check List and Authors Chec List ISSN 1809-127X (Available at Journal of Species Lists and Distribution

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Check List 8(3): 421-425, 2012 © 2012 Check List and Authors Chec List ISSN 1809-127X (Available at Journal of Species Lists and Distribution Check List 8(3): 421-425, 2012 © 2012 Check List and Authors Chec List ISSN 1809-127X (available at www.checklist.org.br) Journal of species lists and distribution Fish fauna of headwater streams that cross the Atlantic PECIES S Forest of south São Paulo state OF 1* 2, Francisco Langeani Neto 3 2 1 and ISTS L Rodrigo S. Almeida 1 Mauricio Cetra , Walter Barrella , Abílio G. Martins , Bruno J. Mello 1 Universidade Federal de São Carlos (UFSCar/Sorocaba), Departamento de Ciências Ambientais. Rodovia João Leme dos Santos, km110. CEP 18052-780. Sorocaba, SP, Brazil. 2 Pontifícia Universidade Católica (PUC/SP), Laboratório de Ecossistemas Aquáticos. Praça Dr. José Ermírio de Moraes, 290. CEP 18030-095. Sorocaba, SP, Brazil. * 3 CorrUniversidadeesponding Estadual author. E-mail:Paulista [email protected] (UNESP/São José do Rio Preto), Departamento de Zoologia e Botânica, Laboratório de Ictiologia. Rua Cristóvão Colombo, 2265. CEP 15054-000. São José do Rio Preto, SP, Brazil. Abstract: The composition The fishes of the ofichthyofauna the present captured study were in the collected streams in of the Sorocaba headwater and Paranapanemastreams of the riverSorocaba, basin Paranapanemawas greatly similar. and Ribeira de Iguape river basins during the dry period in 2010. A total of 2892 fishes, grouped in 53 species, were captured. in the others basins, with the occurrence of endangered species (Isbrueckerichthys epakmos and I. duseni) and exotic species (OnMisgurnus the other anguillicaudatus hand, the fish fauna of the streams of Ribeira de Iguape river basin were quite different from the ones captured species of Characiformes, one Gymnotiformes and four Siluriformes. ). The previous list of fish for the Sorocaba river basin increased with the addition of seven Introduction the Sorocaba, Pirapora and Sarapuí rivers (IPT 2006). The headwaters of the Turvo river are inserted in the UGRHI in the aquatic ecosystem of São Paulo state, we know that 14, corresponding to the hydrographic basin of the Alto the Despitesmall headwater knowing that streams no species are quickly of fish is and totally negatively extinct Paranapanema that presents agricultural characteristics, being altered by anthropogenic interventions in their a population density of around 30 inhabitants/km2 with about 15% of native vegetation and headwaters covered by that occur in these environments may have become extinct reforestation areas and natural forests (CETEC 1999). The drainage basins (Castro and Menezes 1998). Some species UGRHI 11 includes the hydrographic basins of the Ribeira The area of interest is spatially heterogeneous de Iguape and Litoral Sul. About 60% of its territory has characterizedwithout prior scientificby diverse knowledge. interacting patches ranging from native vegetation and it has a population density of about human-dominated environments to conservation units. 15 inhabitants/km2 (CETEC 2000). Given its physical The basin of the Sorocaba river (Tietê river basin) is the conditions, it has the potential for conservation, with most altered due to human activities, followed by the basin Conservation Units covering most part of its territory. During the dry period in 2010 (July – November), Iguape river basin has native vegetation and a high number we sampled the ichthyofauna in ten 100m-sections of of ConservationAlto Paranapanema. Units in On a large the other portion hand, of its the area. Ribeira de streams in the Sorocaba river basin (Table 1), eight in the Paranapanema river basin (Table 2) and nine in the Ribeira has a high heterogenic relief, contributing to the formation de Iguape river basin (Table 3), totalizing 27 surveys of Thenumerous Maciço small-sizede Piedade, watercourses. on the Serra de In Paranapiacaba this region, carried out in the municipalities of Piedade, Pilar do Sul, drainage basin is separated topographically by the Serra Ibiúna, Tapiraí and Salto de Pirapora (Figure 1). de Paranapiacaba that represents a geographical barrier of the adjacent basins of Sorocaba, Paranapanema and Ribeira de Iguape rivers. This situation stimulated the The ichthyofauna was sampled using electric fishing present study, aiming at presenting the composition of the equipment (License n˚ 13352-1 SISBIO/IBAMA/MMA and 260108-004.423/2010 SMA). The organisms collected to the three hydrographic basins. –were São storedJosé do in Riothe Pretofish collection(DZSJRP 13618-13705).of the Ichthyology The fish communities from the headwater streams belonging SorensenLaboratory, index Zoology (IS) wasand appliedBotany Departmentaiming at quantifying of the UNESP the Materials and Methods similarity in the fauna composition between basins. The hydrographic basin of the Sorocaba river and middle Tietê (UGRHI 10) is characterized by a well Results and Discussion in the areas of permanent preservation that range between than 100mm of total length (CT), grouped in 53 species 80developed and 95% industrial and a pole,population a deficit density in vegetative of about covering 140 (81%A total < 100mm of 2892 CT).fish wereThe sizecaptured, agrees being with 89% comments smaller inhabitants/km2. Within this area lie the headwaters of by Castro and Menezes (1998) who, when referring to 421 Cetra et al. | Fishes from Atlantic Forest streams of São Paulo, Brazil highlighting the capture of Misgurnus anguillicaudatus, hydrographic basins of São Paulo state, highlighted that the an exotic species originally from Asia in a stream in the speciesthe fish arefauna small-sized, that live inlimitedly the headwater distributed, streams have of little the Ribeira de Iguape river basin. This species has a great past or no commercial value and show a strong dependence in ecological impacts following its introduction (Froese on the riparian vegetation as a food source of non-native and Pauly 2011). (alloctone) origin, for reproduction and protection. Phalloceros reisi, In the streams of the Sorocaba and Paranapanema Hypostomus ancistroides, Rhamdia quelen, Hoplias river basins 28 species were captured, while in the malabaricusOn the other and hand,Gymnotus individuals silvius ofwere collected in Iguape river basin 23 species were collected (Table 4). et al. de Iguape river basin was quite different from the ones the streams of the three basins, reflecting their wide The specific composition of the streams of the Ribeira geographic distribution (Buckup 2009, Oyakawa and captured in the Sorocaba and Paranapanema basins (ISRI-S status, given that two are from Menezes 2011). Up to now, five species were captured that = 0.27 and ISRI-P the Characiformes order and three from the Siluriformes. similarity between the ichthyofauna of the streams of the had an undefined taxonomic = 0.31). On the other hand, there is a great Sorocaba and Paranapanema river basins (ISS-P = 0.68). AmericaThis situation regarding reflects the the ichthyofauna, affirmation that, its despiterichness the (391 Alto of the Sorocaba and Paranapanema river basin are part of species)Paraná watercourses is far from beingrepresenting the most reality, well-studied mainly in taking South Such results confirm our expectations, since the streams into consideration the new descriptions coming from the in the fauna composition. Furthermore, since the Ribeira streams and headwater environments (Langeani et al. the Alto Paraná basin, and this justifies the high similarity 2007). basin, observing less species richness in the streams of Aiming at updating the list of species published by Smith thede IguapeRibeira riverde Iguape basin basinis smaller is what than one the would Alto Paranáexpect et al. (2007), that recorded the occurrence of 71 species according to the species-area relationship. for the Sorocaba river basin, seven Characiformes species are added: Astyanax paranae, Hyphessobrycon anisitsi, documented species currently exist in the Ribeira de Piabina argentea, Characidium gomesi, Characidium IguapeAccording river basinto Oyakawa and close and to 45%Menezes occur (2011),exclusively 97 oiticicai, Characidium zebra, Apareiodon ibitiensis; one in this basin. This could be the cause of the endemism Gymnotiformes: Gymnotus silvius; and four Siluriformes: in these watercourses. The present study sampled Cetopsorhamdia iheringi, Pimelodella avanhandavae, only the headwater streams and 15 of the 23 species Hypostomus variipictus, Trichomycterus iheringi. This collected (65%) were exclusive, something that could be addition is probably related to the collecting equipment a result of the stronger endemism in these watercourses. since Smith et al. (2007) used gillnets, sieves and puçás (a Furthermore, Isbrueckerichthys epakmos and I. duseni, sort of funnel net), while in the present study only electric et al. (2009), were captured in this study. It is also worth solely in the headwater streams. species in danger of extinction according to Oyakawa fishing has been used and our samples were carried out Figure 1. Boundary of the Sorocaba, Paranapanema and Ribeira de Iguape river basins and streams sampled (Font: http//sinbiota.cria.org.br/atlas/) 422 Cetra et al. | Fishes from Atlantic Forest streams of São Paulo, Brazil Table 1. basin. Geographic location of the sampled sections including its identification, municipality, sub-basin specification in the Sorocaba river hydrographic ID STREAM MUNICIPALITY SUB-BASIN LONG LAT S1 Ibiúna 47°15’24” 23°48’40” S2 Paiol Ibiúna 47°11’29” 23°48’08” Murundu Sorocabuçu S3 Sarapuí Salto de Pirapora Sarapuí 47°35’31” 23°42’37” Sorocabuçu S4 Sarapuí Salto de Pirapora Sarapuí 47°33’18” 23°44’47”
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