Polyphasic growth in fish: a case study with Corydoras paleatus (Siluriformes, Callichthyidae)
ABSTRACT A weight-length relationship was established for Corydoras paleatus (Jenyns, 1842) (Siluriformes, Callichthyidae) (n=596) from samples taken in November-December 2009 and March-April 2010, in Pinguela Lagoon (29°46'57"S; 50°11'16"W), Rio Grande do Sul, Brazil. The specie...
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| Format: | Article |
| Language: | English |
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Fundação Zoobotânica do Rio Grande do Sul
2016-01-01
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| Series: | Iheringia: Série Zoologia |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212016000100217&lng=en&tlng=en |
| _version_ | 1819043191987372032 |
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| author | José R. S. Barradas Isabel S. Lermen Gabriel G. Larré Thaís P. Martins Nelson F. Fontoura |
| author_facet | José R. S. Barradas Isabel S. Lermen Gabriel G. Larré Thaís P. Martins Nelson F. Fontoura |
| author_sort | José R. S. Barradas |
| collection | DOAJ |
| description | ABSTRACT A weight-length relationship was established for Corydoras paleatus (Jenyns, 1842) (Siluriformes, Callichthyidae) (n=596) from samples taken in November-December 2009 and March-April 2010, in Pinguela Lagoon (29°46'57"S; 50°11'16"W), Rio Grande do Sul, Brazil. The species showed a polyphasic allometric growth pattern, each stanza described by an independent power equation controlled by a switch function: W = a1Lb1 ∙ (1 + eRsc ∙ (L-SCP))-1 + a2Lb2 ∙ [1 - (1 + eRsc ∙ (L-SCP))-1] ; where W is the expected weight for a specific length L, a1 and a2 are the proportionality coefficients for stanzas 1 and 2, b1 and b2 are the allometric coefficients for stanzas 1 and 2, Rsc is the stanza changing rate for the switch function and SCP is the stanza changing point for the switch function. The stanza changing point was estimated as 5.28 cm, corresponding with the length at first maturity for this species Lmat (5.29 cm). Our data suggest that a complex growth pattern can be in nature, and perhaps not often identified because trends are obscured by natural variability. |
| first_indexed | 2024-12-21T09:52:52Z |
| format | Article |
| id | doaj.art-cc65fa0a584a4d62a0664b8d4e7f27af |
| institution | Directory Open Access Journal |
| issn | 1678-4766 |
| language | English |
| last_indexed | 2024-12-21T09:52:52Z |
| publishDate | 2016-01-01 |
| publisher | Fundação Zoobotânica do Rio Grande do Sul |
| record_format | Article |
| series | Iheringia: Série Zoologia |
| spelling | doaj.art-cc65fa0a584a4d62a0664b8d4e7f27af2022-12-21T19:08:09ZengFundação Zoobotânica do Rio Grande do SulIheringia: Série Zoologia1678-47662016-01-01106010.1590/1678-4766e2016017S0073-47212016000100217Polyphasic growth in fish: a case study with Corydoras paleatus (Siluriformes, Callichthyidae)José R. S. BarradasIsabel S. LermenGabriel G. LarréThaís P. MartinsNelson F. FontouraABSTRACT A weight-length relationship was established for Corydoras paleatus (Jenyns, 1842) (Siluriformes, Callichthyidae) (n=596) from samples taken in November-December 2009 and March-April 2010, in Pinguela Lagoon (29°46'57"S; 50°11'16"W), Rio Grande do Sul, Brazil. The species showed a polyphasic allometric growth pattern, each stanza described by an independent power equation controlled by a switch function: W = a1Lb1 ∙ (1 + eRsc ∙ (L-SCP))-1 + a2Lb2 ∙ [1 - (1 + eRsc ∙ (L-SCP))-1] ; where W is the expected weight for a specific length L, a1 and a2 are the proportionality coefficients for stanzas 1 and 2, b1 and b2 are the allometric coefficients for stanzas 1 and 2, Rsc is the stanza changing rate for the switch function and SCP is the stanza changing point for the switch function. The stanza changing point was estimated as 5.28 cm, corresponding with the length at first maturity for this species Lmat (5.29 cm). Our data suggest that a complex growth pattern can be in nature, and perhaps not often identified because trends are obscured by natural variability.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212016000100217&lng=en&tlng=enCrescimento alométricotamanho de primeira maturaçãoreproduçãomaturação sexualrelação peso-comprimento |
| spellingShingle | José R. S. Barradas Isabel S. Lermen Gabriel G. Larré Thaís P. Martins Nelson F. Fontoura Polyphasic growth in fish: a case study with Corydoras paleatus (Siluriformes, Callichthyidae) Iheringia: Série Zoologia Crescimento alométrico tamanho de primeira maturação reprodução maturação sexual relação peso-comprimento |
| title | Polyphasic growth in fish: a case study with Corydoras paleatus (Siluriformes, Callichthyidae) |
| title_full | Polyphasic growth in fish: a case study with Corydoras paleatus (Siluriformes, Callichthyidae) |
| title_fullStr | Polyphasic growth in fish: a case study with Corydoras paleatus (Siluriformes, Callichthyidae) |
| title_full_unstemmed | Polyphasic growth in fish: a case study with Corydoras paleatus (Siluriformes, Callichthyidae) |
| title_short | Polyphasic growth in fish: a case study with Corydoras paleatus (Siluriformes, Callichthyidae) |
| title_sort | polyphasic growth in fish a case study with corydoras paleatus siluriformes callichthyidae |
| topic | Crescimento alométrico tamanho de primeira maturação reprodução maturação sexual relação peso-comprimento |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212016000100217&lng=en&tlng=en |
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