Fish larvae from the upper Paraná River: do abiotic factors affect larval density?
The purpose of this study was to evaluate the role of abiotic factors on fish larvae occurrence. Samplings were carried out monthly at 12 stations (grouped in four areas) in the Amambaí, Ivaí and Paraná rivers and in the Itaipu Reservoir (upper Paraná River basin), from October 1994 to January 1995...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Ictiologia
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| Series: | Neotropical Ichthyology |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000400002&lng=en&tlng=en |
| _version_ | 1811317144938348544 |
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| author | Gilmar Baumgartner Keshiyu Nakatani Luiz Carlos Gomes Andréa Bialetzki Paulo Vanderlei Sanches Maristela Cavicchioli Makrakis |
| author_facet | Gilmar Baumgartner Keshiyu Nakatani Luiz Carlos Gomes Andréa Bialetzki Paulo Vanderlei Sanches Maristela Cavicchioli Makrakis |
| author_sort | Gilmar Baumgartner |
| collection | DOAJ |
| description | The purpose of this study was to evaluate the role of abiotic factors on fish larvae occurrence. Samplings were carried out monthly at 12 stations (grouped in four areas) in the Amambaí, Ivaí and Paraná rivers and in the Itaipu Reservoir (upper Paraná River basin), from October 1994 to January 1995 (spawning season). Simultaneously, we obtained water temperature, pH, electrical conductivity, dissolved oxygen, water level, water velocity, and rainfall. Principal Component Analyses (PCA) and Detrended Correspondence Analyses (DCA) were applied to summarize abiotic and larvae density data, respectively. Amambaí River differed significantly from the other areas in relation to abiotic factors. Itaipu Reservoir differed significantly from the other areas considering species composition, and the Ivaí River also differed from the Paraná River. The relationship among PCA and DCA axes were significant, indicating that abiotic factors do influence larva. For example: Leporinus elongatus prefered the Amambaí River, Hypophthalmus edentatus, Plagioscion squamosissimus, and Hoplias aff. malabaricus the Itaipu Reservoir, and Pimelodus maculatus, Auchenipterus osteomystax and Iheringichthys labrosus the Ivaí River. We suggest that species selected some abiotic factors characteristic to a given environment as spawning grounds. |
| first_indexed | 2024-04-13T12:02:51Z |
| format | Article |
| id | doaj.art-9fb0fc54cd65414da10dde6da40a1523 |
| institution | Directory Open Access Journal |
| issn | 1982-0224 |
| language | English |
| last_indexed | 2024-04-13T12:02:51Z |
| publisher | Sociedade Brasileira de Ictiologia |
| record_format | Article |
| series | Neotropical Ichthyology |
| spelling | doaj.art-9fb0fc54cd65414da10dde6da40a15232022-12-22T02:47:44ZengSociedade Brasileira de IctiologiaNeotropical Ichthyology1982-02246455155810.1590/S1679-62252008000400002S1679-62252008000400002Fish larvae from the upper Paraná River: do abiotic factors affect larval density?Gilmar Baumgartner0Keshiyu Nakatani1Luiz Carlos Gomes2Andréa Bialetzki3Paulo Vanderlei Sanches4Maristela Cavicchioli Makrakis5Universidade Estadual do Oeste do ParanáUniversidade Estadual de MaringáUniversidade Estadual de MaringáUniversidade Estadual de MaringáUniversidade ParanaenseUniversidade Estadual do Oeste do ParanáThe purpose of this study was to evaluate the role of abiotic factors on fish larvae occurrence. Samplings were carried out monthly at 12 stations (grouped in four areas) in the Amambaí, Ivaí and Paraná rivers and in the Itaipu Reservoir (upper Paraná River basin), from October 1994 to January 1995 (spawning season). Simultaneously, we obtained water temperature, pH, electrical conductivity, dissolved oxygen, water level, water velocity, and rainfall. Principal Component Analyses (PCA) and Detrended Correspondence Analyses (DCA) were applied to summarize abiotic and larvae density data, respectively. Amambaí River differed significantly from the other areas in relation to abiotic factors. Itaipu Reservoir differed significantly from the other areas considering species composition, and the Ivaí River also differed from the Paraná River. The relationship among PCA and DCA axes were significant, indicating that abiotic factors do influence larva. For example: Leporinus elongatus prefered the Amambaí River, Hypophthalmus edentatus, Plagioscion squamosissimus, and Hoplias aff. malabaricus the Itaipu Reservoir, and Pimelodus maculatus, Auchenipterus osteomystax and Iheringichthys labrosus the Ivaí River. We suggest that species selected some abiotic factors characteristic to a given environment as spawning grounds.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000400002&lng=en&tlng=enLarval ecologySpatial distributionFloodplainItaipu reservoirLarval drift |
| spellingShingle | Gilmar Baumgartner Keshiyu Nakatani Luiz Carlos Gomes Andréa Bialetzki Paulo Vanderlei Sanches Maristela Cavicchioli Makrakis Fish larvae from the upper Paraná River: do abiotic factors affect larval density? Neotropical Ichthyology Larval ecology Spatial distribution Floodplain Itaipu reservoir Larval drift |
| title | Fish larvae from the upper Paraná River: do abiotic factors affect larval density? |
| title_full | Fish larvae from the upper Paraná River: do abiotic factors affect larval density? |
| title_fullStr | Fish larvae from the upper Paraná River: do abiotic factors affect larval density? |
| title_full_unstemmed | Fish larvae from the upper Paraná River: do abiotic factors affect larval density? |
| title_short | Fish larvae from the upper Paraná River: do abiotic factors affect larval density? |
| title_sort | fish larvae from the upper parana river do abiotic factors affect larval density |
| topic | Larval ecology Spatial distribution Floodplain Itaipu reservoir Larval drift |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000400002&lng=en&tlng=en |
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