A macroscopic classification of the embryonic development of the one-sided livebearer Jenynsia multidentata (Teleostei: Anablepidae)
ABSTRACT This study proposes eight stages according to the main discernible changes recorded throughout the embryonic development of Jenynsia multidentata. The development of morphological embryo structures, pigmentation, and changes in tissues connecting mother and embryo were included in the stage...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Ictiologia
2017-12-01
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| Series: | Neotropical Ichthyology |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000400206&lng=en&tlng=en |
| _version_ | 1818562983480000512 |
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| author | Nathalia C. López-Rodríguez Cíntia M. de Barros Ana Cristina Petry |
| author_facet | Nathalia C. López-Rodríguez Cíntia M. de Barros Ana Cristina Petry |
| author_sort | Nathalia C. López-Rodríguez |
| collection | DOAJ |
| description | ABSTRACT This study proposes eight stages according to the main discernible changes recorded throughout the embryonic development of Jenynsia multidentata. The development of morphological embryo structures, pigmentation, and changes in tissues connecting mother and embryo were included in the stage characterization. From the fertilized egg (Stage 1), an embryo reaches the intermediary stages when presenting yolk syncytial layer (Stage 2), initial pigmentation of the outer layers of the retina and dorsal region of the head (Stage 3), and the sprouting of the caudal (Stage 4), dorsal and anal fins (Stage 5). During the later stages, the ovarian folds enter the gills, and the body pigmentation becomes more intense (Stage 6), the body becomes elongated (Stage 7), and there is a greater intensity in body pigmentation and increased muscle mass (Stage 8). The dry weight of the batches varied between 0.6 ± 0.3 mg (Stage 3) to 54.6 ± 19.7 mg (Stage 8), but the dry weight of the maternal-embryonic connecting tissues remained almost constant. After controlling the effect of those reproductive tissues, the gain in dry weight of the batches throughout development increased exponentially from Stage 6, reflecting the increase in size and weight of the embryos due to matrotrophy. |
| first_indexed | 2024-12-14T01:10:54Z |
| format | Article |
| id | doaj.art-129ef67c12de4b28b77fa0bd04efe426 |
| institution | Directory Open Access Journal |
| issn | 1982-0224 |
| language | English |
| last_indexed | 2024-12-14T01:10:54Z |
| publishDate | 2017-12-01 |
| publisher | Sociedade Brasileira de Ictiologia |
| record_format | Article |
| series | Neotropical Ichthyology |
| spelling | doaj.art-129ef67c12de4b28b77fa0bd04efe4262022-12-21T23:22:45ZengSociedade Brasileira de IctiologiaNeotropical Ichthyology1982-02242017-12-0115410.1590/1982-0224-20160170S1679-62252017000400206A macroscopic classification of the embryonic development of the one-sided livebearer Jenynsia multidentata (Teleostei: Anablepidae)Nathalia C. López-RodríguezCíntia M. de BarrosAna Cristina PetryABSTRACT This study proposes eight stages according to the main discernible changes recorded throughout the embryonic development of Jenynsia multidentata. The development of morphological embryo structures, pigmentation, and changes in tissues connecting mother and embryo were included in the stage characterization. From the fertilized egg (Stage 1), an embryo reaches the intermediary stages when presenting yolk syncytial layer (Stage 2), initial pigmentation of the outer layers of the retina and dorsal region of the head (Stage 3), and the sprouting of the caudal (Stage 4), dorsal and anal fins (Stage 5). During the later stages, the ovarian folds enter the gills, and the body pigmentation becomes more intense (Stage 6), the body becomes elongated (Stage 7), and there is a greater intensity in body pigmentation and increased muscle mass (Stage 8). The dry weight of the batches varied between 0.6 ± 0.3 mg (Stage 3) to 54.6 ± 19.7 mg (Stage 8), but the dry weight of the maternal-embryonic connecting tissues remained almost constant. After controlling the effect of those reproductive tissues, the gain in dry weight of the batches throughout development increased exponentially from Stage 6, reflecting the increase in size and weight of the embryos due to matrotrophy.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000400206&lng=en&tlng=enDevelopmental stagesDry weightMatrotrophyMorphologyViviparity |
| spellingShingle | Nathalia C. López-Rodríguez Cíntia M. de Barros Ana Cristina Petry A macroscopic classification of the embryonic development of the one-sided livebearer Jenynsia multidentata (Teleostei: Anablepidae) Neotropical Ichthyology Developmental stages Dry weight Matrotrophy Morphology Viviparity |
| title | A macroscopic classification of the embryonic development of the one-sided livebearer Jenynsia multidentata (Teleostei: Anablepidae) |
| title_full | A macroscopic classification of the embryonic development of the one-sided livebearer Jenynsia multidentata (Teleostei: Anablepidae) |
| title_fullStr | A macroscopic classification of the embryonic development of the one-sided livebearer Jenynsia multidentata (Teleostei: Anablepidae) |
| title_full_unstemmed | A macroscopic classification of the embryonic development of the one-sided livebearer Jenynsia multidentata (Teleostei: Anablepidae) |
| title_short | A macroscopic classification of the embryonic development of the one-sided livebearer Jenynsia multidentata (Teleostei: Anablepidae) |
| title_sort | macroscopic classification of the embryonic development of the one sided livebearer jenynsia multidentata teleostei anablepidae |
| topic | Developmental stages Dry weight Matrotrophy Morphology Viviparity |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000400206&lng=en&tlng=en |
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