Reproduction of the threatened Annual Killifish <i>Austrolebias nigrofasciatus</i> (Cyprinodontiformes: Rivulidae), confined in a natural environment
This study concerns the reproduction of Austrolebias nigrofasciatus, an endangered annual fish species endemic to the waters of the São Gonçalo channel and its tributaries in southern Brazil. Three breeding pairs confined in small cages for four weeks in their biotope were observed to produce an ave...
Main Authors: | , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Wildlife Information Liaison Development Society
2011-06-01
|
Series: | Journal of Threatened Taxa |
Online Access: | http://threatenedtaxa.org/index.php/JoTT/article/view/662 |
id |
doaj-d8524ef93bda4d02a22b639ab6f30161 |
---|---|
record_format |
Article |
spelling |
doaj-d8524ef93bda4d02a22b639ab6f301612020-11-25T02:52:10ZengWildlife Information Liaison Development SocietyJournal of Threatened Taxa0974-78930974-79072011-06-01361864186710.11609/JoTT.o2575.1864-7648Reproduction of the threatened Annual Killifish <i>Austrolebias nigrofasciatus</i> (Cyprinodontiformes: Rivulidae), confined in a natural environmentM.V. VolcanA.P. FonsecaR.B. RobaldoThis study concerns the reproduction of Austrolebias nigrofasciatus, an endangered annual fish species endemic to the waters of the São Gonçalo channel and its tributaries in southern Brazil. Three breeding pairs confined in small cages for four weeks in their biotope were observed to produce an average of 21.5 plus or minus 12.0 eggs/week/female, with a range of 3-39 eggs/female/week. Average egg diameter was 1.51 plus or minus 0.12 mm, with abrupt changes observed throughout the period of study. The mean oviposition observed was within the range found for other killifishes and demonstrates the high fecundity rate of the species even under confinement conditions.http://threatenedtaxa.org/index.php/JoTT/article/view/662 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
M.V. Volcan A.P. Fonseca R.B. Robaldo |
spellingShingle |
M.V. Volcan A.P. Fonseca R.B. Robaldo Reproduction of the threatened Annual Killifish <i>Austrolebias nigrofasciatus</i> (Cyprinodontiformes: Rivulidae), confined in a natural environment Journal of Threatened Taxa |
author_facet |
M.V. Volcan A.P. Fonseca R.B. Robaldo |
author_sort |
M.V. Volcan |
title |
Reproduction of the threatened Annual Killifish <i>Austrolebias nigrofasciatus</i> (Cyprinodontiformes: Rivulidae), confined in a natural environment |
title_short |
Reproduction of the threatened Annual Killifish <i>Austrolebias nigrofasciatus</i> (Cyprinodontiformes: Rivulidae), confined in a natural environment |
title_full |
Reproduction of the threatened Annual Killifish <i>Austrolebias nigrofasciatus</i> (Cyprinodontiformes: Rivulidae), confined in a natural environment |
title_fullStr |
Reproduction of the threatened Annual Killifish <i>Austrolebias nigrofasciatus</i> (Cyprinodontiformes: Rivulidae), confined in a natural environment |
title_full_unstemmed |
Reproduction of the threatened Annual Killifish <i>Austrolebias nigrofasciatus</i> (Cyprinodontiformes: Rivulidae), confined in a natural environment |
title_sort |
reproduction of the threatened annual killifish <i>austrolebias nigrofasciatus</i> (cyprinodontiformes: rivulidae), confined in a natural environment |
publisher |
Wildlife Information Liaison Development Society |
series |
Journal of Threatened Taxa |
issn |
0974-7893 0974-7907 |
publishDate |
2011-06-01 |
description |
This study concerns the reproduction of Austrolebias nigrofasciatus, an endangered annual fish species endemic to the waters of the São Gonçalo channel and its tributaries in southern Brazil. Three breeding pairs confined in small cages for four weeks in their biotope were observed to produce an average of 21.5 plus or minus 12.0 eggs/week/female, with a range of 3-39 eggs/female/week. Average egg diameter was 1.51 plus or minus 0.12 mm, with abrupt changes observed throughout the period of study. The mean oviposition observed was within the range found for other killifishes and demonstrates the high fecundity rate of the species even under confinement conditions. |
url |
http://threatenedtaxa.org/index.php/JoTT/article/view/662 |
work_keys_str_mv |
AT mvvolcan reproductionofthethreatenedannualkillifishiaustrolebiasnigrofasciatusicyprinodontiformesrivulidaeconfinedinanaturalenvironment AT apfonseca reproductionofthethreatenedannualkillifishiaustrolebiasnigrofasciatusicyprinodontiformesrivulidaeconfinedinanaturalenvironment AT rbrobaldo reproductionofthethreatenedannualkillifishiaustrolebiasnigrofasciatusicyprinodontiformesrivulidaeconfinedinanaturalenvironment |
_version_ |
1724730891978145792 |