The flood pulse regulates the longitudinal distribution of fish assemblages in the amazonian floodplain lakes
The present study evaluated the incidence of fish species in Cujubim Lake in Porto Velho (Rondônia, Brazil) concerning periods of flood and low water. For this, we used experimental fisheries, with ichthyofauna samplings carried out in the years 2019 and 2020, which resulted in 2,508 specimens. For...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Instituto de Pesca
2022-12-01
|
| Series: | Boletim do Instituto de Pesca |
| Subjects: | |
| Online Access: | https://institutodepesca.org/index.php/bip/article/view/1694 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850228812220989440 |
|---|---|
| author | Raniere Garcez Costa Sousa Nathalya Sousa Oliveira Fábio Ricardo da Rosa |
| author_facet | Raniere Garcez Costa Sousa Nathalya Sousa Oliveira Fábio Ricardo da Rosa |
| author_sort | Raniere Garcez Costa Sousa |
| collection | DOAJ |
| description |
The present study evaluated the incidence of fish species in Cujubim Lake in Porto Velho (Rondônia, Brazil) concerning periods of flood and low water. For this, we used experimental fisheries, with ichthyofauna samplings carried out in the years 2019 and 2020, which resulted in 2,508 specimens. For quantifying the ecological data, we analyzed Shannon-Weaver diversity, species richness, Simpson dominance and Pielou evenness. The predominant fish orders were Characiformes and Siluriformes, and the species Anchovia aff. surinamensis was the most abundant (N=809/35.49%). Diversity indicators were similar across all sectors (S1=the lower margin - end, S2=center and S3=mouth of the lake). Only the levels of richness and abundance were lower in the S3 sector, despite the importance of this habitat as a link to the Madeira River, which indicates transient diversity, followed by active selection of the S1 and S2 sectors in the lake by most fish. Limnological data, such as those of temperature (30.30±1.20°C), conductivity (35.82±5.98 µS cm-1), dissolved oxygen (7.38±3.56 mg L-1) and pH (6.70±0.54), were within the acceptable levels for tropical fish. The non-metric multidimensional scaling (NMDS) analysis showed the ordering of parameters by sector and species with greater affinity for each environmental attribute, in which dissolved oxygen (NMDS1=-0.720; r2=0.862 and p=0.043) and electrical conductivity stood out. Thus, it can be concluded that the behavior of the fish diversity of Cujubim Lake is affected both seasonally and longitudinally.
|
| format | Article |
| id | doaj-art-e426f6212f2044bdab0853d0191bb045 |
| institution | OA Journals |
| issn | 1678-2305 |
| language | English |
| publishDate | 2022-12-01 |
| publisher | Instituto de Pesca |
| record_format | Article |
| series | Boletim do Instituto de Pesca |
| spelling | doaj-art-e426f6212f2044bdab0853d0191bb0452025-08-20T02:04:25ZengInstituto de PescaBoletim do Instituto de Pesca1678-23052022-12-014810.20950/1678-2305/bip.2022.48.e688The flood pulse regulates the longitudinal distribution of fish assemblages in the amazonian floodplain lakesRaniere Garcez Costa Sousa0Nathalya Sousa Oliveira1Fábio Ricardo da Rosa2Universidade Federal de Rondônia, Graduation Program in Environmental Science 7, Fisheries Science Department – Presidente Médici (RO), Brazil. Universidade Federal de Rondônia, Pesca, Aquicultura e Ecologia de Peixes de Águas Interiores Research Group, Animal Science Department – Presidente Médici (RO), Brazil. Netz – Consultoria Ambiental em Comunidades Aquáticas – Marialva (PR), Brazil. The present study evaluated the incidence of fish species in Cujubim Lake in Porto Velho (Rondônia, Brazil) concerning periods of flood and low water. For this, we used experimental fisheries, with ichthyofauna samplings carried out in the years 2019 and 2020, which resulted in 2,508 specimens. For quantifying the ecological data, we analyzed Shannon-Weaver diversity, species richness, Simpson dominance and Pielou evenness. The predominant fish orders were Characiformes and Siluriformes, and the species Anchovia aff. surinamensis was the most abundant (N=809/35.49%). Diversity indicators were similar across all sectors (S1=the lower margin - end, S2=center and S3=mouth of the lake). Only the levels of richness and abundance were lower in the S3 sector, despite the importance of this habitat as a link to the Madeira River, which indicates transient diversity, followed by active selection of the S1 and S2 sectors in the lake by most fish. Limnological data, such as those of temperature (30.30±1.20°C), conductivity (35.82±5.98 µS cm-1), dissolved oxygen (7.38±3.56 mg L-1) and pH (6.70±0.54), were within the acceptable levels for tropical fish. The non-metric multidimensional scaling (NMDS) analysis showed the ordering of parameters by sector and species with greater affinity for each environmental attribute, in which dissolved oxygen (NMDS1=-0.720; r2=0.862 and p=0.043) and electrical conductivity stood out. Thus, it can be concluded that the behavior of the fish diversity of Cujubim Lake is affected both seasonally and longitudinally. https://institutodepesca.org/index.php/bip/article/view/1694Seasonality; Fish ecology; Amazon fishing; Migration. |
| spellingShingle | Raniere Garcez Costa Sousa Nathalya Sousa Oliveira Fábio Ricardo da Rosa The flood pulse regulates the longitudinal distribution of fish assemblages in the amazonian floodplain lakes Boletim do Instituto de Pesca Seasonality; Fish ecology; Amazon fishing; Migration. |
| title | The flood pulse regulates the longitudinal distribution of fish assemblages in the amazonian floodplain lakes |
| title_full | The flood pulse regulates the longitudinal distribution of fish assemblages in the amazonian floodplain lakes |
| title_fullStr | The flood pulse regulates the longitudinal distribution of fish assemblages in the amazonian floodplain lakes |
| title_full_unstemmed | The flood pulse regulates the longitudinal distribution of fish assemblages in the amazonian floodplain lakes |
| title_short | The flood pulse regulates the longitudinal distribution of fish assemblages in the amazonian floodplain lakes |
| title_sort | flood pulse regulates the longitudinal distribution of fish assemblages in the amazonian floodplain lakes |
| topic | Seasonality; Fish ecology; Amazon fishing; Migration. |
| url | https://institutodepesca.org/index.php/bip/article/view/1694 |
| work_keys_str_mv | AT ranieregarcezcostasousa thefloodpulseregulatesthelongitudinaldistributionoffishassemblagesintheamazonianfloodplainlakes AT nathalyasousaoliveira thefloodpulseregulatesthelongitudinaldistributionoffishassemblagesintheamazonianfloodplainlakes AT fabioricardodarosa thefloodpulseregulatesthelongitudinaldistributionoffishassemblagesintheamazonianfloodplainlakes AT ranieregarcezcostasousa floodpulseregulatesthelongitudinaldistributionoffishassemblagesintheamazonianfloodplainlakes AT nathalyasousaoliveira floodpulseregulatesthelongitudinaldistributionoffishassemblagesintheamazonianfloodplainlakes AT fabioricardodarosa floodpulseregulatesthelongitudinaldistributionoffishassemblagesintheamazonianfloodplainlakes |