Developmental Temperature Shapes the Otolith Morphology of Metamorphosing and Juvenile Gilthead Seabream (<i>Sparus aurata</i> Linnaeus, 1758)
Otolith morphological variability is used as a reliable indicator to discriminate fish that experience different environmental conditions during their lifetimes. The present study examined the effects of developmental temperature (DT) during the egg and yolk-sac larval period on the otolith shape an...
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MDPI AG
2022-04-01
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| Series: | Fishes |
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| Online Access: | https://www.mdpi.com/2410-3888/7/2/82 |
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| author | George Geladakis Chara Kourkouta Stylianos Somarakis George Koumoundouros |
| author_facet | George Geladakis Chara Kourkouta Stylianos Somarakis George Koumoundouros |
| author_sort | George Geladakis |
| collection | DOAJ |
| description | Otolith morphological variability is used as a reliable indicator to discriminate fish that experience different environmental conditions during their lifetimes. The present study examined the effects of developmental temperature (DT) during the egg and yolk-sac larval period on the otolith shape and asymmetry of Gilthead seabream in the later metamorphosis (56–58 days post-hatching, dph) and the early juvenile stage (93–95 dph). The experimental populations were reared at different water temperatures (17, 20, or 23 °C DT) from epiboly onset to the end of the yolk-sac larval stage (5–7 days post-fertilization, dpf) and then at a common rearing temperature (20 °C), up to the end of the trials (93–95 dph). Otolith shape and bilateral asymmetry were analyzed at metamorphosis (20–21 mm standard length, SL) and the early juvenile stage (31–32 mm SL). The results of elliptic Fourier analysis showed that DT significantly affected the otolith shape at both stages examined. Furthermore, elevated DT significantly increased the asymmetry levels of seabream otoliths in the early juvenile stage. The results are discussed in terms of the thermally induced long-term changes of seabream otolith morphology and the potential effects of the raised otolith asymmetry on wild seabream juveniles. |
| first_indexed | 2024-03-09T10:36:51Z |
| format | Article |
| id | doaj.art-04a11090d1b0408898c73a5cc478043f |
| institution | Directory Open Access Journal |
| issn | 2410-3888 |
| language | English |
| last_indexed | 2024-03-09T10:36:51Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Fishes |
| spelling | doaj.art-04a11090d1b0408898c73a5cc478043f2023-12-01T20:52:57ZengMDPI AGFishes2410-38882022-04-01728210.3390/fishes7020082Developmental Temperature Shapes the Otolith Morphology of Metamorphosing and Juvenile Gilthead Seabream (<i>Sparus aurata</i> Linnaeus, 1758)George Geladakis0Chara Kourkouta1Stylianos Somarakis2George Koumoundouros3Biology Department, University of Crete, 70013 Heraklion, Crete, GreeceBiology Department, University of Crete, 70013 Heraklion, Crete, GreeceInstitute of Marine Biological Resources and Inland Waters (IMBRIW), Hellenic Centre for Marine Research (HCMR), 71500 Heraklion, Crete, GreeceBiology Department, University of Crete, 70013 Heraklion, Crete, GreeceOtolith morphological variability is used as a reliable indicator to discriminate fish that experience different environmental conditions during their lifetimes. The present study examined the effects of developmental temperature (DT) during the egg and yolk-sac larval period on the otolith shape and asymmetry of Gilthead seabream in the later metamorphosis (56–58 days post-hatching, dph) and the early juvenile stage (93–95 dph). The experimental populations were reared at different water temperatures (17, 20, or 23 °C DT) from epiboly onset to the end of the yolk-sac larval stage (5–7 days post-fertilization, dpf) and then at a common rearing temperature (20 °C), up to the end of the trials (93–95 dph). Otolith shape and bilateral asymmetry were analyzed at metamorphosis (20–21 mm standard length, SL) and the early juvenile stage (31–32 mm SL). The results of elliptic Fourier analysis showed that DT significantly affected the otolith shape at both stages examined. Furthermore, elevated DT significantly increased the asymmetry levels of seabream otoliths in the early juvenile stage. The results are discussed in terms of the thermally induced long-term changes of seabream otolith morphology and the potential effects of the raised otolith asymmetry on wild seabream juveniles.https://www.mdpi.com/2410-3888/7/2/82otolith shapebilateral asymmetryphenotypic plasticitypost-settlementteleosts |
| spellingShingle | George Geladakis Chara Kourkouta Stylianos Somarakis George Koumoundouros Developmental Temperature Shapes the Otolith Morphology of Metamorphosing and Juvenile Gilthead Seabream (<i>Sparus aurata</i> Linnaeus, 1758) Fishes otolith shape bilateral asymmetry phenotypic plasticity post-settlement teleosts |
| title | Developmental Temperature Shapes the Otolith Morphology of Metamorphosing and Juvenile Gilthead Seabream (<i>Sparus aurata</i> Linnaeus, 1758) |
| title_full | Developmental Temperature Shapes the Otolith Morphology of Metamorphosing and Juvenile Gilthead Seabream (<i>Sparus aurata</i> Linnaeus, 1758) |
| title_fullStr | Developmental Temperature Shapes the Otolith Morphology of Metamorphosing and Juvenile Gilthead Seabream (<i>Sparus aurata</i> Linnaeus, 1758) |
| title_full_unstemmed | Developmental Temperature Shapes the Otolith Morphology of Metamorphosing and Juvenile Gilthead Seabream (<i>Sparus aurata</i> Linnaeus, 1758) |
| title_short | Developmental Temperature Shapes the Otolith Morphology of Metamorphosing and Juvenile Gilthead Seabream (<i>Sparus aurata</i> Linnaeus, 1758) |
| title_sort | developmental temperature shapes the otolith morphology of metamorphosing and juvenile gilthead seabream i sparus aurata i linnaeus 1758 |
| topic | otolith shape bilateral asymmetry phenotypic plasticity post-settlement teleosts |
| url | https://www.mdpi.com/2410-3888/7/2/82 |
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