Naididae (Annelida, Oligochaeta) associated with Pomacea bridgesii (Reeve) (Gastropoda, Ampullaridae)

Abstract

The family Amplullaridae belongs to this class Gastropoda and is made up of freshwater organisms with a wide geographical distribution in tropical regions. Oligochaeta worms can be found in association with snails of this family, inhabiting the umbilicus of their shells. Due to the lack of information on the ecology of these worms, this work focused on investigating which kind of Oligochaeta species associate with the mollusk Pomacea bridgesii (Reeve, 1856). Samples were collected during winter and spring 2003 and summer 2004. From a total of 209 snails collected, the presence of Oligochaeta worms was observed in only 58 of them (27.75%). In these infected snails, 89 Oligochaeta worms were found, all belonging to the family Naididae. The species Haemonais waldvogeli Bretscher, 1900, Dero (Dero) nivea Aiyer, 1929 and Dero (Dero) sawayai Marcus, 1943 were the most abundant (43.68%, 12.32% and 10.08%, respectively). Haemonais waldvogeli was found in all of the seasons studied, what demonstrates its affinity for this kind of substrate. The results indicate that several Naididae species find in the umbilicus of these snails's shells (which contains fine detritus) a favorable habitat for establishing themselves.

Aquatic oligochaeta (Annelida: Clitellata) in extractive reserve Lake Cuniã, Western Brazilian Amazon

“…Like other species of Oligochaeta, it can live in association with other organisms, but is especially found on aquatic vegetation (Correia & Trivinho-Strixino, 1998, Trivinho-Strixino et al 2000, Alves & Gorni, 2007. Stephenson, 1925 (Figure 2f) The records of this species occurrence are in the State of São Paulo, where it was found in urban streams with low concentration of dissolved oxygen (Alves et al 2006) and in organically enriched reservoirs (Fusari & Fonseca-Gessner, 2006). (Aiyer, 1929) (Figure 2g) Species with records only in São Paulo and Paraná.…”

“…In Brazil, it has been found in the State of São Paulo associated with other organisms such as gastropods (Gorni & Alves, 2006), aquatic macrophytes (Alves & Gorni, 2007), and sponges (Gorni & Alves, 2008a). It has also been recorded in an urban stream by Alves et al (2006). (Müller, 1774) (Figure 2b) A cosmopolitan species, characterized by the presence of gills and palps in the posterior region of its body (Brinkhurst & Marchese, 1989).…”

“…Its occurrence in Brazilian aquatic environments has been registered in the States of São Paulo, Paraná, Minas Gerais, Pernambuco and Rio Grande do Sul. It also frequently lives in association with other organisms such as Nymphaea (Marcus, 1944), gastropods (Gorni & Alves, 2006), macrophytes (Montanholi- Martins & Takeda, 2001) and also to decomposing macrophyte leaves (Martins et al 2011). It has been already detected in floodplain habitats (Ragonha & Takeda, 2014), in streams of preserved areas (Rodrigues et al 2013) and in irrigated rice fields (Stenert et al 2012).…”

“…Dero digitata (O. F. Müller, 1773) (Figure 2d) In Brazil, this species has been registered in the State of São Paulo, in association with gastropods (Gorni & Alves, 2006) and macrophytes (Alves & Gorni, 2007), in reservoirs (Pamplin et al 2005) and in urban streams (Alves & Lucca, 2000). In the Amazon region, it has been registered in many rivers in the State of Pará, such as Tapajós River, Cururu River, Acara River, Cupari River, Juruena River and São Samuel River (Marcus 1942, Marcus, 1944, Du Bois-Reymond Marcus, 1947, 1949a, 1949b.…”

“…This results in fragmented and scarce information on the invertebrate fauna (Magurran, 2011), especially in continental aquatic ecosystems, where the information about this group is even more incomplete (Agostinho et al 2005). Biota Neotrop., 17(1): e20160232, 2017 http://www.scielo.br/bn http://dx.doi.org/10.1590/1676-0611- BN-2016-0232 Aquatic Oligochaeta worms are one of the most abundant organisms in continental aquatic fauna and can be found in sediments, in water columns or associated to other organisms such as molluscs (Gorni & Alves, 2006), aquatic macrophytes (Alves & Gorni, 2007), insect larvae (Corbi et al 2004), bryophytes (Gorni & Alves, 2007), sponges (Gorni & Alves, 2008a) and amphibians (Oda et al, 2015). It is important to highlight that these organisms are important for organic matter cycling of freshwater ecosystems, bioturbation processes, biomonitoring research, aquatic ecotoxicology and test organisms (Chapman, 2001, Corbi et al 2015.…”