Fishes (Osteichthyes: Actinopterygii) from igarapés of the rio Acre basin, Brazilian Amazon

Abstract

This study presents a list of species from igarapés tributaries of the rio Acre, Acre State, Brazil. Fish assemblages were sampled in October 2009, August and October 2010, using standard ichthyological gear, along fifteen sampling sites. A total of 11,395 specimens, distributed in 94 species, 24 families and six orders were collected. The most species-rich orders were Characiformes with 45 species (48.4%) and Siluriformes with 33 species (34.7%); from which Serrapinnus gr. microdon (22.4%), Otocinclus vittatus (20.4%), Phenacogaster pectinatus (10.9%), Brachychalcinus copei (5.8%) and Knodus sp. (5.3%) represented 64.8 % of the specimens captured. The species accumulation curve does not present a stabilization tendency, indicating that, additional sampling can increase the number of species. This study has a high importance for the knowledge of the rio Acre fish fauna composition and adds 52 new records of species to the fish fauna of the rio Purus.

Ichthyofauna from floodplain lakes of Reserva de Desenvolvimento Sustentável Piagaçu-Purus (RDS-PP), lower rio Purus

“…Considering all registers published for the rio Purus basin (i.e. La Monte 1935, Rapp Py-Daniel & de Deus 2003, Fernandes et al 2004, Anjos et al 2008, Duarte et al 2010Claro-García et al 2013, and the present) 360 currently valid species compose the ichthyofauna of this river basin. Still, we strongly believe that this number is underestimated, with much of the basin still unexplored or only sparsely sampled.…”

“…Despite this potential, few studies were conducted in order to investigate the ichthyofauna of this basin. Most focused on the upper portion of the river, with 48 species recorded in the río Macauhan (tributary of río Yaco) (La Monte 1935), 86 species in Caeté and Macapá rivers (Anjos et al 2008), and 94 species in rio Acre (Claro-García et al 2013). The investigations in lower rio Purus registered higher number of species: 180 by Rapp in flooded areas, and approximately 110 species in two sandy beaches of Reserva Biológica de Abufari and Reserva de Desenvolvimento Sustentável Piagaçu-Purus (RDS-PP) (Duarte et al 2010).…”

Agrobiodiversity in the floodplains and its economic function in the Peruvian Amazon

“…Las playas y barreales inundados con los cultivos agrícolas forman un hábitat de protección y alimentación de peces y tortugas. Más sin cuestionar sobre los impactos extractivos (Correa y Maitahuari, 2015) y sus potencialidades económicas que representa en la Amazonia (Claro-García et al, 2013) estos recursos son capturados por la pesca artesanal por un corto espacio de tiempo (1 a 2 semanas). La Figura 4 demuestra la proporción de agricultores dedicados a la actividad de pesca así como su orientación al consumo y a la comercialización.…”

Histoquímica De Oócitos De Peixes Do Gênero Steindachnerina (Characiformes: Curimatidae)

“…No Acre, existem aproximadamente 251 espécies de peixes catalogadas, e a segunda categoria com maior diversidade de espécies catalogadas é a de vertebrados (21,6%), representando 10,7% da riqueza brasileira (4,5). Dentre elas, está presente a família Curimatidae e o gênero Steindachnerina (6).…”