Abstract
Abstract: The present study reviews the records of occurrences of fish species found in the Mamirauá Sustainable Development Reserve (MSDR). The reserve is located in a large section of the middle Solimões River basin, in its interflow with Japurá River. For the elaboration of the list of fish species occurring in Mamirauá Reserve, we used a database of different studies on fish communities carried out in the area over the last three decades, in addition to the material deposited in the ichthyological collections of three scientific institutions, the National Institute for Amazon Research - INPA, the Mamirauá Sustainable Development Institute - IDSM and the Science and Technology Museum of the Catholic University of Rio Grande do Sul - PUCRS. The ichthyofauna of the MSDR is composed of 541 species, encompassing 45 families and 15 orders. These correspond to 20% of all valid species known for the entire Amazonia so far. As observed in other studies in the Neotropical Region, the more represented orders were Siluriformes (209 species) and Characiformes (185 species), followed by the Gymnotiformes (78 species). The results presented here demonstrate a considerable increase (86%) in the knowledge about the fish diversity found in Mamirauá Reserve, in relation to its first list of fish species, published in the 90's. This increase reflects not only the growth in number of studies on fish diversity in the area, with new surveys, but also the continuous taxonomic work on the collections, and descriptions of twenty-eight new species, with one hundred and ten type series. Further surveys are expected to take place in the Northwestern, more isolated areas of the Reserve, and will allow the identification of new occurrences, and may even unveil new fish species yet to be described to Science..
Highlights
At the end of the XX century, an attempt to inventory the fish fauna of the Mamirauá Reserve was made, and produced a first list of 291 species (Crampton 1999)
These figures correspond to about 20% of all species valid for the Amazon (Dagosta and De Pinna 2019), and represent a 86% increase in relation to the first list produced for the Reserva de Desenvolvimento Sustentável Mamirauá (RDSM), published in the end of the last century (Crampton, 1999)
As detected in other studies and fish fauna surveys in Neotropical sites, the most represented orders were Siluriformes, with 209 species, and Characiformes, with 185 species (Beltrão and Soares 2018; Beltrão et al 2019; Dagosta and De Pinna 2019). Together they represent more than 70% of the fish species richness at Mamirauá Reserve
Summary
At the end of the XX century, an attempt to inventory the fish fauna of the Mamirauá Reserve was made, and produced a first list of 291 species (Crampton 1999). This information is usually originated in species lists from very restricted areas, tend to be taxonomically unreliable and not supported by voucher specimens deposited in the main scientific fish collections Despite these limitations, it is generally recognized that the ichthyofauna found in the Solimões-Amazonas várzea is placed among the more diverse of the Amazon, especially at the Western parts of the Central Brazilian Amazon, upstream from Manaus, the capital city of Amazonas State. One of the main characteristics of this type of protected area, is the participatory management of natural resources by the local populations, combined with the scientific research to support their activities (Queiroz 2005) In this way, a large inventory was made for the Mamirauá Reserve area and its adjacent rivers, generating a first list of fish species (Crampton 1999). The goal of the present paper, is to provide an updated list of the fish fauna that occur in the Mamirauá Sustainable Development Reserve
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