Length-weight relationships of ornamental fish from floodplain lakes in the Solimões River basin (Iranduba, Amazonas, Brazil)

Abstract

This research reports the LWR of ornamental fish from floodplain lakes of the Solimões River basin. The fish were caught in the Paciência island (a fluvial island) in two lakes Sacambú and Cacau using purse seine 7 m × 4 m and mesh size = 3 mm, once during the flood in June 2017 and dry in January 2018. The specimens captured were anesthetized using eugenol 15 mg · L–1, fixed formalin 10% and stored ethanol 70% after 10 days. This study provides the LWR parameters for the species Anablepsoides micropus, Anchoviella jamesi, Cichlasoma amazonarum, Heros efasciatus, Ctenobrycon hauxwellianus, Copella nattereri and Hemigrammus levis. The parameter a ranged from 0.0092 to 0.0229, b ranged from 2.78 to 3.50 and the R2 ranged from 0.985 to 0.998. The results represent new information about ornamental fish from floodplain lakes, with new LWR for five species that are not present in FishBase data set and probably are new for science. This study is preliminary and much work needs to be done especially in the Solimões River floodplain areas and with our research we hope to encourage new studies in the region.

Length‐weight relationship of 16 fish species from the Negro River basin (Amazonas state, Brazil)

“…The type of growth of fish species is variable, causing changes in the values of these parameters. Furthermore, many factors can influence these values including species’ biology, food availability, environmental conditions, geographic region and climatic changes (Matos et al., 2019; Oliveira et al., 2020; Prestes et al., 2019; Sampaio et al., 2019).…”

“…The Amazon Basin is a huge ecosystem composed of many river sub‐basins. Currently, most length‐weight relationships of the fish species studied are based on individuals collected in the Amazon River (Freitas et al., 2017; Oliveira et al., 2020), Solimões River (Dieb‐Magalhães et al., 2015; Matos et al., 2019; Sampaio et al., 2019; Tribuzy‐Neto et al., 2015, 2018; Villacorta‐Correa & Saint‐Paul, 1999), Madeira River (Cella‐Ribeiro et al., 2015) and Xingu River (Giarrizzo et al., 2015). Thus, few studies using this approach analyze species collected in the Negro River basin, which is the second largest sub‐basin of the Amazon basin (Goulding et al., 2003).…”

Length‐weight relationship of fish species from Central Amazon floodplain

“…From all records presented here, LWR estimates for Cichla monoculus and Pterygoplichthys pardalis can be found at FishBase, however, we opted to keep these two species in the study because the published record for the first species was based on three specimens only, and for the second, refers to an introduced population in the Philippines (Jumawan & Seroney, 2017), as opposed to our findings that are based on natural populations (Ferraris‐Jr, 2007). Our study also considers another seven species which LWR estimates have already been published elsewhere, however, we decided to present the information here because they bring new records on the maximum length, were based on a larger number of specimens and showed better size range: Heros efasciatus (Sampaio, Aguiar‐Santos, Anjos, Freitas, & Siqueira‐Souza, 2019), Curimatella meyeri (Matos et al., 2019), Cichlasoma amazonarum (Sampaio et al, 2019), Acestrorhynchus abbreviatus, Anadoras grypus, Chalceus erythrurus, and Pterygoplichthys pardalis (the four species on Chuctayal, Capitani, Faustino, & Castro, 2017).…”

Length‐weight relationships of 10 fish species from the coastal waters of the East China Sea

“…Parameter b for all analyzed species corroborates with the expected values of the allometric coefficient b (2.5–3.5) as defined by Froese (2006). The changes observed in the b ‐values for the different species could be attributed to the differences in the sampling season, and possibly differences in the fish conditions as a result of different environmental conditions (Ma et al., 2017, 2020; Sampaio et al., 2019).…”

“…and large sample size was collected for these species. Sexual and seasonal variations may also influence the estimate accuracy of LWRs (Ma et al., 2017, 2020; Sampaio et al., 2019), so future study should be explored to deal with the growth heterogeneity of these species.…”