Abnormal embryos of sharpnose sharks, Rhizoprionodon porosus and Rhizoprionodon lalandii (Elasmobranchii: Carcharhinidae), from Brazilian coast, western South Atlantic
| Autor: | Otto Bismarck Fazzano Gadig, Camila Mayumi Hirata dos Santos |
|---|---|
| Přispěvatelé: | Universidade Estadual Paulista (Unesp) |
| Rok vydání: | 2014 |
| Předmět: |
anatomy
animal structures Rhizoprionodon porosus anomaly Aquatic Science Oceanography Rhizoprionodon lalandii Elasmobranchii morphology medicine Ecology Evolution Behavior and Systematics Ecology biology Pelvic fin Rhizoprionodon conservation biology.organism_classification Dorsal fin body regions Fishery medicine.anatomical_structure embryonic structures Entire vertebral column human activities elasmobranch Vertebral column |
| Zdroj: | Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| ISSN: | 1755-2672 |
| Popis: | Made available in DSpace on 2018-12-11T17:08:26Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-01-01 This study presents the second worldwide report on abnormal embryos of the sharpnose sharks, Rhizoprionodon, based on the two species (Rhizoprionodon porosus and Rhizoprionodon lalandii) occurring on the Brazilian coast. For R. porosus two conjoined twin embryos showing complete duplication of the vertebral column, viscera and several external structures (head, first and second dorsal fins, pectoral fins), and scoliosis in both axis at the pelvic fin level are reported. The three embryos of R. lalandii exhibited numerous lordosis and kyphosis along the entire vertebral column. The possible relationship between anomalies and the human major threats to sharks is discussed based on previous reproductive, genetic and ecotoxicological studies on R. lalandii for southern Brazil. UNESP Campus de Rio Claro, Rua 24A no 1515 Laboratório de Pesquisa de Elasmobrânquios UNESP Campus Experimental do Litoral Paulista, Praça Infante Dom Henrique s/n UNESP Campus de Rio Claro, Rua 24A no 1515 Laboratório de Pesquisa de Elasmobrânquios UNESP Campus Experimental do Litoral Paulista, Praça Infante Dom Henrique s/n |
| Databáze: | OpenAIRE |
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