The influence of temperature on the embryonic development of the annual fish Cynopoecilus melanotaenia (Cyprinodontiformes, Rivulidae)
The present study aims to provide data about the time required for Cynopoecilus melanotaenia kept at different temperatures to complete embryonic development. This information can be valuable for optimizing laboratory culture and facilitating future use of this species as a test organism in toxicity...
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| Format: | Article |
| Language: | English |
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Instituto Internacional de Ecologia
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| Series: | Brazilian Journal of Biology |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842002000500002&lng=en&tlng=en |
| _version_ | 1818150945036435456 |
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| author | A. ARENZON C. A. LEMOS M. B. C. BOHRER |
| author_facet | A. ARENZON C. A. LEMOS M. B. C. BOHRER |
| author_sort | A. ARENZON |
| collection | DOAJ |
| description | The present study aims to provide data about the time required for Cynopoecilus melanotaenia kept at different temperatures to complete embryonic development. This information can be valuable for optimizing laboratory culture and facilitating future use of this species as a test organism in toxicity tests. Temperature effects on hatching rate are presented as well as information related to embryonic development stages. Eggs were observed daily, from start to finish of embryonic development. Thirteen developmental stages were described. Eggs were kept at two constant temperatures (20°C and 25°C) and at a variable ambient temperature (16-25°C - mean = 21°C, sd = 1.95), to determine developmental rate (velocity) at each temperature. A shorter incubation period was necessary to complete development at 25° ± 1°C. However, all embryos kept at this temperature hatched with morphological defects, which prevented their survival. No significant difference in developmental time period (p = 0.05) was observed at the 20°C and 16°-25°C (mean = 21°C, sd = 1.95) temperatures. |
| first_indexed | 2024-12-11T13:30:59Z |
| format | Article |
| id | doaj.art-153e8e2d99264399bf19200dce877a80 |
| institution | Directory Open Access Journal |
| issn | 1678-4375 |
| language | English |
| last_indexed | 2024-12-11T13:30:59Z |
| publisher | Instituto Internacional de Ecologia |
| record_format | Article |
| series | Brazilian Journal of Biology |
| spelling | doaj.art-153e8e2d99264399bf19200dce877a802022-12-22T01:05:15ZengInstituto Internacional de EcologiaBrazilian Journal of Biology1678-4375624b74374710.1590/S1519-69842002000500002S1519-69842002000500002The influence of temperature on the embryonic development of the annual fish Cynopoecilus melanotaenia (Cyprinodontiformes, Rivulidae)A. ARENZON0C. A. LEMOS1M. B. C. BOHRER2Universidade Federal do Rio Grande do SulUniversidade Federal do Rio Grande do SulUniversidade Federal do Rio Grande do SulThe present study aims to provide data about the time required for Cynopoecilus melanotaenia kept at different temperatures to complete embryonic development. This information can be valuable for optimizing laboratory culture and facilitating future use of this species as a test organism in toxicity tests. Temperature effects on hatching rate are presented as well as information related to embryonic development stages. Eggs were observed daily, from start to finish of embryonic development. Thirteen developmental stages were described. Eggs were kept at two constant temperatures (20°C and 25°C) and at a variable ambient temperature (16-25°C - mean = 21°C, sd = 1.95), to determine developmental rate (velocity) at each temperature. A shorter incubation period was necessary to complete development at 25° ± 1°C. However, all embryos kept at this temperature hatched with morphological defects, which prevented their survival. No significant difference in developmental time period (p = 0.05) was observed at the 20°C and 16°-25°C (mean = 21°C, sd = 1.95) temperatures.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842002000500002&lng=en&tlng=enannual fishtemperatureCynopoecilus melanotaeniaembryonic development |
| spellingShingle | A. ARENZON C. A. LEMOS M. B. C. BOHRER The influence of temperature on the embryonic development of the annual fish Cynopoecilus melanotaenia (Cyprinodontiformes, Rivulidae) Brazilian Journal of Biology annual fish temperature Cynopoecilus melanotaenia embryonic development |
| title | The influence of temperature on the embryonic development of the annual fish Cynopoecilus melanotaenia (Cyprinodontiformes, Rivulidae) |
| title_full | The influence of temperature on the embryonic development of the annual fish Cynopoecilus melanotaenia (Cyprinodontiformes, Rivulidae) |
| title_fullStr | The influence of temperature on the embryonic development of the annual fish Cynopoecilus melanotaenia (Cyprinodontiformes, Rivulidae) |
| title_full_unstemmed | The influence of temperature on the embryonic development of the annual fish Cynopoecilus melanotaenia (Cyprinodontiformes, Rivulidae) |
| title_short | The influence of temperature on the embryonic development of the annual fish Cynopoecilus melanotaenia (Cyprinodontiformes, Rivulidae) |
| title_sort | influence of temperature on the embryonic development of the annual fish cynopoecilus melanotaenia cyprinodontiformes rivulidae |
| topic | annual fish temperature Cynopoecilus melanotaenia embryonic development |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842002000500002&lng=en&tlng=en |
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