Genetic and morphologic differentiation of the Lusitanian toadfish (Halobatrachus didactylus) between estuarine and coastal areas in Portugal
The Lusitanian toadfish, Halobatrachus didactylus (Bloch and Schneider, 1801), is distributed from the Ghana coast to the Iberian Peninsula, being particularly abundant on the south coast of Portugal. The differentiation of this species along the Portuguese coast was assessed through the an...
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| Format: | Article |
| Language: | English |
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Consejo Superior de Investigaciones Científicas
2006-12-01
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| Series: | Scientia Marina |
| Subjects: | |
| Online Access: | http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/81 |
| _version_ | 1818938982171410432 |
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| author | Joana F. Marques Ana Luísa Rego José Lino Costa Maria José Costa Henrique N. Cabral |
| author_facet | Joana F. Marques Ana Luísa Rego José Lino Costa Maria José Costa Henrique N. Cabral |
| author_sort | Joana F. Marques |
| collection | DOAJ |
| description | The Lusitanian toadfish, Halobatrachus didactylus (Bloch and Schneider, 1801), is distributed from the Ghana coast to the Iberian Peninsula, being particularly abundant on the south coast of Portugal. The differentiation of this species along the Portuguese coast was assessed through the analysis of 10 samples, considering morphological characters (20 morphometric and 16 meristic) and genetic markers (10 allozymes, 11 loci). Southern samples included estuaries and their adjacent coastal areas, given that this species inhabits both environments, whereas western samples only comprised estuaries. Morphometric and meristic data discriminant analysis evidenced some differentiation between estuarine and coastal populations. This was not entirely corroborated by the genetic analysis, which showed an overall pattern of low FST (0.042) and Nei’s genetic distance, even between geographically distant areas. However, higher values of these parameters were found between estuaries of the south coast and their adjacent coastal areas, suggesting that estuarine systems play a major role in such differentiation. Results are discussed regarding toadfish life-history pattern and Portuguese coast geomorphology, giving an insight into the biological and environmental factors influencing population sub-structuring. |
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| id | doaj.art-a66845a95882471eb638d8b16537bf3a |
| institution | Directory Open Access Journal |
| issn | 0214-8358 1886-8134 |
| language | English |
| last_indexed | 2024-12-20T06:16:30Z |
| publishDate | 2006-12-01 |
| publisher | Consejo Superior de Investigaciones Científicas |
| record_format | Article |
| series | Scientia Marina |
| spelling | doaj.art-a66845a95882471eb638d8b16537bf3a2022-12-21T19:50:32ZengConsejo Superior de Investigaciones CientíficasScientia Marina0214-83581886-81342006-12-0170474975810.3989/scimar.2006.70n474978Genetic and morphologic differentiation of the Lusitanian toadfish (Halobatrachus didactylus) between estuarine and coastal areas in PortugalJoana F. Marques0Ana Luísa Rego1José Lino Costa2Maria José Costa3Henrique N. Cabral4Universidade de Lisboa, Faculdade de Ciências, Instituto de Oceanografia, LisboaUniversidade de Lisboa, Faculdade de Ciências, Instituto de Oceanografia, LisboaUniversidade de Lisboa, Faculdade de Ciências, Instituto de Oceanografia, LisboaUniversidade de Lisboa, Faculdade de Ciências, Instituto de Oceanografia, LisboaUniversidade de Lisboa, Faculdade de Ciências, Instituto de Oceanografia, LisboaThe Lusitanian toadfish, Halobatrachus didactylus (Bloch and Schneider, 1801), is distributed from the Ghana coast to the Iberian Peninsula, being particularly abundant on the south coast of Portugal. The differentiation of this species along the Portuguese coast was assessed through the analysis of 10 samples, considering morphological characters (20 morphometric and 16 meristic) and genetic markers (10 allozymes, 11 loci). Southern samples included estuaries and their adjacent coastal areas, given that this species inhabits both environments, whereas western samples only comprised estuaries. Morphometric and meristic data discriminant analysis evidenced some differentiation between estuarine and coastal populations. This was not entirely corroborated by the genetic analysis, which showed an overall pattern of low FST (0.042) and Nei’s genetic distance, even between geographically distant areas. However, higher values of these parameters were found between estuaries of the south coast and their adjacent coastal areas, suggesting that estuarine systems play a major role in such differentiation. Results are discussed regarding toadfish life-history pattern and Portuguese coast geomorphology, giving an insight into the biological and environmental factors influencing population sub-structuring.http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/81halobatrachus didactylus differentiationallozymesmorphologypopulation structurecoastal areas |
| spellingShingle | Joana F. Marques Ana Luísa Rego José Lino Costa Maria José Costa Henrique N. Cabral Genetic and morphologic differentiation of the Lusitanian toadfish (Halobatrachus didactylus) between estuarine and coastal areas in Portugal Scientia Marina halobatrachus didactylus differentiation allozymes morphology population structure coastal areas |
| title | Genetic and morphologic differentiation of the Lusitanian toadfish (Halobatrachus didactylus) between estuarine and coastal areas in Portugal |
| title_full | Genetic and morphologic differentiation of the Lusitanian toadfish (Halobatrachus didactylus) between estuarine and coastal areas in Portugal |
| title_fullStr | Genetic and morphologic differentiation of the Lusitanian toadfish (Halobatrachus didactylus) between estuarine and coastal areas in Portugal |
| title_full_unstemmed | Genetic and morphologic differentiation of the Lusitanian toadfish (Halobatrachus didactylus) between estuarine and coastal areas in Portugal |
| title_short | Genetic and morphologic differentiation of the Lusitanian toadfish (Halobatrachus didactylus) between estuarine and coastal areas in Portugal |
| title_sort | genetic and morphologic differentiation of the lusitanian toadfish halobatrachus didactylus between estuarine and coastal areas in portugal |
| topic | halobatrachus didactylus differentiation allozymes morphology population structure coastal areas |
| url | http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/81 |
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