Reproductive biology of Garra regressus and Garra tana (Cypriniformes: Cyprinidae) from Lake Tana, Ethiopia
<p>The reproductive biology of <em>Garra regressus </em>and<em> Garra tana </em>was investigated by collecting monthly samples (January to December 2006) from the southern Gulf of Lake Tana, where these species are endemic. <em>Garra regressus</em> has an e...
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| Format: | Article |
| Language: | English |
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Wildlife Information Liaison Development Society
2015-05-01
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| Series: | Journal of Threatened Taxa |
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| Online Access: | http://www.threatenedtaxa.org/index.php/JoTT/article/view/2019 |
| _version_ | 1811310595619684352 |
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| author | Akewake Geremew Abebe Getahun Eshete Dejen |
| author_facet | Akewake Geremew Abebe Getahun Eshete Dejen |
| author_sort | Akewake Geremew |
| collection | DOAJ |
| description | <p>The reproductive biology of <em>Garra regressus </em>and<em> Garra tana </em>was investigated by collecting monthly samples (January to December 2006) from the southern Gulf of Lake Tana, where these species are endemic. <em>Garra regressus</em> has an extended breeding time from April to October while <em>G. tana</em> breeds throughout the year with a peak from March to July. The mean size at maturity in both the species was not significantly different between the sexes, but <em>G. tana</em> had a significantly lower mean size at maturity than <em>G. regressus</em> in female specimens. Absolute fecundity estimates for <em>G. regressus</em> ranged from 580.8–1800, while those for <em>G. tana</em> ranged from 538.9–2968. Egg size frequency distribution revealed that <em>G. regressus</em> is a multiple spawner, while <em>G. tana</em> is a single spawner. The sex ratio in the total catch of <em>G. regressus</em> was found to be skewed in favour of females (Chi-square, P< 0.05), while those for <em>G. tana</em> was not significantly different from 1:1. The mean size at maturity was not significantly different between the sexes for <em>G. tana</em>.</p><div> </div> |
| first_indexed | 2024-04-13T10:01:44Z |
| format | Article |
| id | doaj.art-57ad92381bc04cab9c4efe73dd6f4b99 |
| institution | Directory Open Access Journal |
| issn | 0974-7893 0974-7907 |
| language | English |
| last_indexed | 2024-04-13T10:01:44Z |
| publishDate | 2015-05-01 |
| publisher | Wildlife Information Liaison Development Society |
| record_format | Article |
| series | Journal of Threatened Taxa |
| spelling | doaj.art-57ad92381bc04cab9c4efe73dd6f4b992022-12-22T02:51:13ZengWildlife Information Liaison Development SocietyJournal of Threatened Taxa0974-78930974-79072015-05-01767223723310.11609/jott.2019.7223-72331706Reproductive biology of Garra regressus and Garra tana (Cypriniformes: Cyprinidae) from Lake Tana, EthiopiaAkewake Geremew0Abebe Getahun1Eshete Dejen2Department of Biology, Dilla University, P.O. Box 419, Dilla, EthiopiaDepartment of Zoological Sciences, Addis Ababa University, P. O. Box 1176, Addis Ababa, EthiopiaAgriculture and Environment Division (AED), Inter-Governmental Authority on Development (IGAD), Djibouti<p>The reproductive biology of <em>Garra regressus </em>and<em> Garra tana </em>was investigated by collecting monthly samples (January to December 2006) from the southern Gulf of Lake Tana, where these species are endemic. <em>Garra regressus</em> has an extended breeding time from April to October while <em>G. tana</em> breeds throughout the year with a peak from March to July. The mean size at maturity in both the species was not significantly different between the sexes, but <em>G. tana</em> had a significantly lower mean size at maturity than <em>G. regressus</em> in female specimens. Absolute fecundity estimates for <em>G. regressus</em> ranged from 580.8–1800, while those for <em>G. tana</em> ranged from 538.9–2968. Egg size frequency distribution revealed that <em>G. regressus</em> is a multiple spawner, while <em>G. tana</em> is a single spawner. The sex ratio in the total catch of <em>G. regressus</em> was found to be skewed in favour of females (Chi-square, P< 0.05), while those for <em>G. tana</em> was not significantly different from 1:1. The mean size at maturity was not significantly different between the sexes for <em>G. tana</em>.</p><div> </div>http://www.threatenedtaxa.org/index.php/JoTT/article/view/2019Conservationcyprinidendemismspawningthreatened. |
| spellingShingle | Akewake Geremew Abebe Getahun Eshete Dejen Reproductive biology of Garra regressus and Garra tana (Cypriniformes: Cyprinidae) from Lake Tana, Ethiopia Journal of Threatened Taxa Conservation cyprinid endemism spawning threatened. |
| title | Reproductive biology of Garra regressus and Garra tana (Cypriniformes: Cyprinidae) from Lake Tana, Ethiopia |
| title_full | Reproductive biology of Garra regressus and Garra tana (Cypriniformes: Cyprinidae) from Lake Tana, Ethiopia |
| title_fullStr | Reproductive biology of Garra regressus and Garra tana (Cypriniformes: Cyprinidae) from Lake Tana, Ethiopia |
| title_full_unstemmed | Reproductive biology of Garra regressus and Garra tana (Cypriniformes: Cyprinidae) from Lake Tana, Ethiopia |
| title_short | Reproductive biology of Garra regressus and Garra tana (Cypriniformes: Cyprinidae) from Lake Tana, Ethiopia |
| title_sort | reproductive biology of garra regressus and garra tana cypriniformes cyprinidae from lake tana ethiopia |
| topic | Conservation cyprinid endemism spawning threatened. |
| url | http://www.threatenedtaxa.org/index.php/JoTT/article/view/2019 |
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