Growth of silver catfish ( Rhamdia quelen ) exposed to acidic pH at different humic acid levels
ABSTRACT: Humic substances are organic compounds that possess high molecular weight and are formed by the decomposition of plant materials. Humic substances comprise humic acids, fulvic acids and humin. Humic acids (HA) have shown to be able to provide some protection to biological membranes of fish...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Universidade Federal de Santa Maria
2016-06-01
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| Series: | Ciência Rural |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000601094&lng=en&tlng=en |
| _version_ | 1828802473771401216 |
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| author | Silvio Teixeira da Costa Fernando Jonas Sutili Luciane Tourem Gressler Luíza Loebens Carine Vargas Colpo Rafael Lazzari Bernardo Baldisserotto |
| author_facet | Silvio Teixeira da Costa Fernando Jonas Sutili Luciane Tourem Gressler Luíza Loebens Carine Vargas Colpo Rafael Lazzari Bernardo Baldisserotto |
| author_sort | Silvio Teixeira da Costa |
| collection | DOAJ |
| description | ABSTRACT: Humic substances are organic compounds that possess high molecular weight and are formed by the decomposition of plant materials. Humic substances comprise humic acids, fulvic acids and humin. Humic acids (HA) have shown to be able to provide some protection to biological membranes of fish in water with low pH, replacing the protective action of Ca2+. Thus, this studyaimed to observe growth of silver catfish ( Rhamdia quelen ) juveniles exposed to pHs 5.5 and 6.5 and to different levels of HA: 0, 10, 25 and 50mg L-1. Results showed that, irrespective of pH, HA was highly detrimental to silver catfish growth, since the higher the concentration of HA, the lower the weight gain and feed intake, resulting in lower biomass and lower specific growth rate of juveniles. Hence, HA is extremely damaging to the performance of silver catfish juveniles in the tested concentrations. |
| first_indexed | 2024-12-12T07:04:41Z |
| format | Article |
| id | doaj.art-8500e811572c4128a5f72719a42ca46a |
| institution | Directory Open Access Journal |
| issn | 1678-4596 |
| language | English |
| last_indexed | 2024-12-12T07:04:41Z |
| publishDate | 2016-06-01 |
| publisher | Universidade Federal de Santa Maria |
| record_format | Article |
| series | Ciência Rural |
| spelling | doaj.art-8500e811572c4128a5f72719a42ca46a2022-12-22T00:33:47ZengUniversidade Federal de Santa MariaCiência Rural1678-45962016-06-014661094109910.1590/0103-8478cr20151027S0103-84782016000601094Growth of silver catfish ( Rhamdia quelen ) exposed to acidic pH at different humic acid levelsSilvio Teixeira da CostaFernando Jonas SutiliLuciane Tourem GresslerLuíza LoebensCarine Vargas ColpoRafael LazzariBernardo BaldisserottoABSTRACT: Humic substances are organic compounds that possess high molecular weight and are formed by the decomposition of plant materials. Humic substances comprise humic acids, fulvic acids and humin. Humic acids (HA) have shown to be able to provide some protection to biological membranes of fish in water with low pH, replacing the protective action of Ca2+. Thus, this studyaimed to observe growth of silver catfish ( Rhamdia quelen ) juveniles exposed to pHs 5.5 and 6.5 and to different levels of HA: 0, 10, 25 and 50mg L-1. Results showed that, irrespective of pH, HA was highly detrimental to silver catfish growth, since the higher the concentration of HA, the lower the weight gain and feed intake, resulting in lower biomass and lower specific growth rate of juveniles. Hence, HA is extremely damaging to the performance of silver catfish juveniles in the tested concentrations.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000601094&lng=en&tlng=enSubstância húmicapH da águacrescimentocarbono orgânico |
| spellingShingle | Silvio Teixeira da Costa Fernando Jonas Sutili Luciane Tourem Gressler Luíza Loebens Carine Vargas Colpo Rafael Lazzari Bernardo Baldisserotto Growth of silver catfish ( Rhamdia quelen ) exposed to acidic pH at different humic acid levels Ciência Rural Substância húmica pH da água crescimento carbono orgânico |
| title | Growth of silver catfish ( Rhamdia quelen ) exposed to acidic pH at different humic acid levels |
| title_full | Growth of silver catfish ( Rhamdia quelen ) exposed to acidic pH at different humic acid levels |
| title_fullStr | Growth of silver catfish ( Rhamdia quelen ) exposed to acidic pH at different humic acid levels |
| title_full_unstemmed | Growth of silver catfish ( Rhamdia quelen ) exposed to acidic pH at different humic acid levels |
| title_short | Growth of silver catfish ( Rhamdia quelen ) exposed to acidic pH at different humic acid levels |
| title_sort | growth of silver catfish rhamdia quelen exposed to acidic ph at different humic acid levels |
| topic | Substância húmica pH da água crescimento carbono orgânico |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000601094&lng=en&tlng=en |
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