Reproductive biology of the mullet Mugil liza (Teleostei: Mugilidae) in a tropical Brazilian bay
The reproductive biology of Mugil liza Valenciennes, 1836 is described as a contribution to an elaborate management programm. A total of 243 specimens (89 males and 154 females) were collected in the Sepetiba Bay in south-eastern Brazil from July/2006 to June/2007. The gonadosomatic index (I G) and...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Zoologia
2010-06-01
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| Series: | Zoologia (Curitiba) |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000300003 |
| _version_ | 1797969812416102400 |
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| author | Rafael J. Albieri Francisco G. Araújo |
| author_facet | Rafael J. Albieri Francisco G. Araújo |
| author_sort | Rafael J. Albieri |
| collection | DOAJ |
| description | The reproductive biology of Mugil liza Valenciennes, 1836 is described as a contribution to an elaborate management programm. A total of 243 specimens (89 males and 154 females) were collected in the Sepetiba Bay in south-eastern Brazil from July/2006 to June/2007. The gonadosomatic index (I G) and the sequential development of the ovaries observed through histological studies suggested that the spawning season ranged from May to August. The population reached total sexual maturity (L T100) at 550 and 570 mm total length (L T) for males and females, respectively. Females attained a larger size than males, and the sex ratio was female-biased for fish larger than 500 mm L T. The hepatosomatic index (I H) was significantly related to the I G, indicating that vitellogenesis mobilizes hepatic energy during reproduction. Mean fecundity was 3,080,000 oocytes. The presence of only two phases of oocyte development in ripe ovaries - a reserve stock and a clutch of post-vitellogenic oocytes - indicated that ovarian development is group synchronic and this species is characterized as a total spawner. The results suggest that establishing a closed fishing season from May to August and establishing a minimum size for capture of 350 mm L T would enhance stock conservation and production for future harvest seasons. |
| first_indexed | 2024-04-11T03:07:19Z |
| format | Article |
| id | doaj.art-71f96aba5fcc48aa86e760825e7c5f3a |
| institution | Directory Open Access Journal |
| issn | 1984-4670 1984-4689 |
| language | English |
| last_indexed | 2024-04-11T03:07:19Z |
| publishDate | 2010-06-01 |
| publisher | Sociedade Brasileira de Zoologia |
| record_format | Article |
| series | Zoologia (Curitiba) |
| spelling | doaj.art-71f96aba5fcc48aa86e760825e7c5f3a2023-01-02T12:40:38ZengSociedade Brasileira de ZoologiaZoologia (Curitiba)1984-46701984-46892010-06-0127333134010.1590/S1984-46702010000300003Reproductive biology of the mullet Mugil liza (Teleostei: Mugilidae) in a tropical Brazilian bayRafael J. AlbieriFrancisco G. AraújoThe reproductive biology of Mugil liza Valenciennes, 1836 is described as a contribution to an elaborate management programm. A total of 243 specimens (89 males and 154 females) were collected in the Sepetiba Bay in south-eastern Brazil from July/2006 to June/2007. The gonadosomatic index (I G) and the sequential development of the ovaries observed through histological studies suggested that the spawning season ranged from May to August. The population reached total sexual maturity (L T100) at 550 and 570 mm total length (L T) for males and females, respectively. Females attained a larger size than males, and the sex ratio was female-biased for fish larger than 500 mm L T. The hepatosomatic index (I H) was significantly related to the I G, indicating that vitellogenesis mobilizes hepatic energy during reproduction. Mean fecundity was 3,080,000 oocytes. The presence of only two phases of oocyte development in ripe ovaries - a reserve stock and a clutch of post-vitellogenic oocytes - indicated that ovarian development is group synchronic and this species is characterized as a total spawner. The results suggest that establishing a closed fishing season from May to August and establishing a minimum size for capture of 350 mm L T would enhance stock conservation and production for future harvest seasons.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000300003Hepatosomatic indexoocyte developmentspawningstock conservation |
| spellingShingle | Rafael J. Albieri Francisco G. Araújo Reproductive biology of the mullet Mugil liza (Teleostei: Mugilidae) in a tropical Brazilian bay Zoologia (Curitiba) Hepatosomatic index oocyte development spawning stock conservation |
| title | Reproductive biology of the mullet Mugil liza (Teleostei: Mugilidae) in a tropical Brazilian bay |
| title_full | Reproductive biology of the mullet Mugil liza (Teleostei: Mugilidae) in a tropical Brazilian bay |
| title_fullStr | Reproductive biology of the mullet Mugil liza (Teleostei: Mugilidae) in a tropical Brazilian bay |
| title_full_unstemmed | Reproductive biology of the mullet Mugil liza (Teleostei: Mugilidae) in a tropical Brazilian bay |
| title_short | Reproductive biology of the mullet Mugil liza (Teleostei: Mugilidae) in a tropical Brazilian bay |
| title_sort | reproductive biology of the mullet mugil liza teleostei mugilidae in a tropical brazilian bay |
| topic | Hepatosomatic index oocyte development spawning stock conservation |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000300003 |
| work_keys_str_mv | AT rafaeljalbieri reproductivebiologyofthemulletmugillizateleosteimugilidaeinatropicalbrazilianbay AT franciscogaraujo reproductivebiologyofthemulletmugillizateleosteimugilidaeinatropicalbrazilianbay |