An inventory of coastal freshwater fishes from Amapá highlighting the occurrence of eight new records for Brazil

Abstract

The Amazon Basin occupies a vast portion of northern South America and contains some of the highest species richness in the world. The northern Brazilian state of Amapá is delimited by the Amazonas River to the south, the Oyapock River to the northern boundary with French Guyana, and the Atlantic northeastern coast to Amazon estuary. Despite several expeditions to the Amazon in recent decades, little is known about the freshwater ichthyofauna from Amapá, with records limited to local inventories and species descriptions. This paper presents a compilation of the freshwater fish diversity sampled in fifteen sites covering two major Amapá ecoregions during the dry season of 2015. 120 species representing eight orders and 40 families are reported upon in this work. Eight species appear for the first time in the Brazilian territory providing new information for future conservation status evaluations.

An integrative framework to reevaluate the Neotropical catfish genus Guyanancistrus (Siluriformes: Loricariidae) with particular emphasis on the Guyanancistrus brevispinis complex

“…Guyanancistrus brevispinis (Heitmans, Nijssen & Isbrücker, 1983): Isbrücker in Isbrücker et al, 2001 [ 52 ]: 19 (original designation as type species of Guyanancistrus ); Fisch-Muller, 2003 [ 100 ]: 385 (checklist, valid); Mol et al 2007 [ 56 ]: 112 (Lely Mountains); Covain & Fisch-Muller, 2012 [ 50 ]: 244 (in molecular phylogeny of Pseudancistrus sensu lato , generic reassignation); Mol et al, 2012 [ 45 ]: 274 (distribution in Suriname); Le Bail et al, 2012 [ 44 ]: 303 (distribution in French Guiana); Mol, 2012 [ 55 ]: 448–449 (complementary description and illustration); Lujan et al, 2015 [ 49 ]: 278 (in a molecular phylogeny of Loricariidae); Melo et al, 2016 [ 104 ]: 134 (collected in Amapá, Brazil).…”

Length-weight and length-length relationships of 16 fish species from Amapá, Brazilian Amazon

“…Fishes were caught with sieve and trawl net in several heterogenic habitats, such as small streams, river channels and lagoons covering two ecoregions of northern Brazil ( sensu Abell et al., ): the Guianas (lower Oyapock river) and Amazonas Estuary and Coastal Drainages (see Melo et al., ). Field expedition was realized during dry season of late November/early December 2015.…”

“…Despite of easily obtained, LWR and LLR parameters of most fish species stay unavailable (Froese, ), including those from remote regions. The Amazon ichthyofauna from the coastal rivers of the state of Amapá, northern Brazil, was recently extensively inventoried and 120 freshwater fish species were reported (Melo, Benine, Britzke, Gama, & Oliveira, ). In order to further investigate their ecology, we provide LWR and LLR for 16 fish species from coastal rivers of Amapá.…”

Ichthyofauna of the Ribeirão Frutal and tributaries, upper Rio Paraná basin, Minas Gerais, Southeastern Brazil

“…Consequently, these studies may result in new discoveries (e.g., undescribed species) and can be implemented as the basis for conservation actions (e.g., Castro et al 2004, Serra et al 2007, Raiol et al 2012, Ohara & Loeb 2016, Silva-Oliveira et al 2016, Melo et al 2016, Ferreira et al 2017.…”