Gonadal development of jundiá, Rhamdia quelen(Teleostei, Siluriformes), in earthen ponds in southern Brazil - DOI: 10.4025/actascibiolsci.v29i4.881
The study characterized the gonadal development of jundiá from approximately 8 g until gonadal maturation, to provide further knowledge for farming jundiá in Southern Brazil. Jundiá fingerlings (average weight 8.00 ± 3.73 g) were stocked in three ponds at 0.6 fish m-2. Fourteen fish were sampled eac...
| Authors: | , , , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 2008 |
| Country: | Brasil |
| Institution: | Universidade Estadual de Maringá (UEM) |
| Repository: | Acta Scientiarum Biological Sciences |
| Language: | Portuguese |
| OAI Identifier: | oai:periodicos.uem.br/ojs:article/881 |
| Online Access: | http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/881 |
| Access Level: | Open access |
| Keyword: | jundiá reprodução Rhamdia quelen piscicultura desenvolvimento gonadal 2.01.00.00-0 Biologia Geral |
| Summary: | The study characterized the gonadal development of jundiá from approximately 8 g until gonadal maturation, to provide further knowledge for farming jundiá in Southern Brazil. Jundiá fingerlings (average weight 8.00 ± 3.73 g) were stocked in three ponds at 0.6 fish m-2. Fourteen fish were sampled each month from September 2001 to October 2002. Gonadal maturation stages were characterized macroscopically, and samples of ovaries and testicles were fixed in 4-%-buffered formalin for histological examination. One hundred and eighteen fish were analyzed: 60 males e 58 females. Jundiá males matured earlier than females. Testicles and ovaries presented similar morphology to other Siluriformes species. Gonads were classified in four development phases of the ovarian follicle, according to histology: immature, initial maturation, final maturation and mature. The gonadosomatic index varied from 0.29 to 9.16 for males and from 0.11 to 13.03 for females. Mature individuals were observed during summer (December/2001 and January/2002), fall (April and May/2002) and spring (September and October/2002), following the increase in water temperature. |
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