Olive ridley inter-nesting and post-nesting movements along the Brazilian coast and Atlantic Ocean
The states of Sergipe and Bahia comprise the main nesting beaches for olive ridley sea turtles Lepidochelys olivacea in Brazil. Between February 2014 and March 2015, 40 L. olivacea were equipped with Argos platform transmitter terminal tags. A state-space model was applied to Argos location data to...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Inter-Research
2019-11-01
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| Series: | Endangered Species Research |
| Online Access: | https://www.int-res.com/abstracts/esr/v40/p149-162/ |
| _version_ | 1819128019317424128 |
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| author | EAP Santos ACCD Silva R Sforza FLC Oliveira MI Weber JC Castilhos M López-Mendilaharsu MAAG Marcovaldi RMA Ramos A DiMatteo |
| author_facet | EAP Santos ACCD Silva R Sforza FLC Oliveira MI Weber JC Castilhos M López-Mendilaharsu MAAG Marcovaldi RMA Ramos A DiMatteo |
| author_sort | EAP Santos |
| collection | DOAJ |
| description | The states of Sergipe and Bahia comprise the main nesting beaches for olive ridley sea turtles Lepidochelys olivacea in Brazil. Between February 2014 and March 2015, 40 L. olivacea were equipped with Argos platform transmitter terminal tags. A state-space model was applied to Argos location data to investigate the animals’ spatial ecology and identify areas of restricted movements (ARMs) and directional movements. The inter-nesting ARMs included the continental shelf from the south of Alagoas state to the north of Bahia, totaling 7244 km2 (kernel density estimation, 90% isopleth) and generally extended up to 22 km from the coast or to the 50 m isobath. The post-nesting directional movements were classified as either (1) neritic north/northeastern (N/NE) Brazil to French Guiana (n = 4 turtles), (2) neritic south/southeastern (S/SE) Brazil (n = 16), or (3) oceanic (n = 19) from Brazil to West Africa. ARMs consistent with foraging areas were identified for 24 olive ridleys: 15 along the continental shelf of SE Brazil, 2 adjacent to Ceará and Maranhão states (between the 25 and 75 m isobaths), and 7 off the African countries of Cape Verde, Senegal, Gambia, Guinea-Bissau, and Sierra Leone. The results demonstrated the complexity of olive ridley movements from northern Brazil, raised questions about connectivity, and highlighted threats such as fisheries, ports, and hydrocarbon exploration fields overlapping with, or near to, high-use areas. These results can be used as a basis for spatial management measures to protect this endangered species. |
| first_indexed | 2024-12-22T08:21:10Z |
| format | Article |
| id | doaj.art-a62d3980bce6416abbaa3b1364216ab5 |
| institution | Directory Open Access Journal |
| issn | 1863-5407 1613-4796 |
| language | English |
| last_indexed | 2024-12-22T08:21:10Z |
| publishDate | 2019-11-01 |
| publisher | Inter-Research |
| record_format | Article |
| series | Endangered Species Research |
| spelling | doaj.art-a62d3980bce6416abbaa3b1364216ab52022-12-21T18:32:46ZengInter-ResearchEndangered Species Research1863-54071613-47962019-11-014014916210.3354/esr00985Olive ridley inter-nesting and post-nesting movements along the Brazilian coast and Atlantic OceanEAP Santos0ACCD Silva1R Sforza2FLC Oliveira3MI Weber4JC Castilhos5M López-Mendilaharsu6MAAG Marcovaldi7RMA Ramos8A DiMatteo9Centro TAMAR-ICMBio, Vitória, Espírito Santo, CEP 29050-335, BrazilFundação PRÓ-TAMAR, Salvador, Bahia, CEP 48280-000, BrazilCentro TAMAR-ICMBio, Vitória, Espírito Santo, CEP 29050-335, BrazilFundação PRÓ-TAMAR, Salvador, Bahia, CEP 48280-000, BrazilFundação PRÓ-TAMAR, Salvador, Bahia, CEP 48280-000, BrazilFundação PRÓ-TAMAR, Salvador, Bahia, CEP 48280-000, BrazilFundação PRÓ-TAMAR, Salvador, Bahia, CEP 48280-000, BrazilFundação PRÓ-TAMAR, Salvador, Bahia, CEP 48280-000, BrazilEngeo Soluções Integradas Ltda, Vitória, Espírito Santo, CEP 29066-040, BrazilCheloniData LLC, Berthoud, Colorado 80513, USAThe states of Sergipe and Bahia comprise the main nesting beaches for olive ridley sea turtles Lepidochelys olivacea in Brazil. Between February 2014 and March 2015, 40 L. olivacea were equipped with Argos platform transmitter terminal tags. A state-space model was applied to Argos location data to investigate the animals’ spatial ecology and identify areas of restricted movements (ARMs) and directional movements. The inter-nesting ARMs included the continental shelf from the south of Alagoas state to the north of Bahia, totaling 7244 km2 (kernel density estimation, 90% isopleth) and generally extended up to 22 km from the coast or to the 50 m isobath. The post-nesting directional movements were classified as either (1) neritic north/northeastern (N/NE) Brazil to French Guiana (n = 4 turtles), (2) neritic south/southeastern (S/SE) Brazil (n = 16), or (3) oceanic (n = 19) from Brazil to West Africa. ARMs consistent with foraging areas were identified for 24 olive ridleys: 15 along the continental shelf of SE Brazil, 2 adjacent to Ceará and Maranhão states (between the 25 and 75 m isobaths), and 7 off the African countries of Cape Verde, Senegal, Gambia, Guinea-Bissau, and Sierra Leone. The results demonstrated the complexity of olive ridley movements from northern Brazil, raised questions about connectivity, and highlighted threats such as fisheries, ports, and hydrocarbon exploration fields overlapping with, or near to, high-use areas. These results can be used as a basis for spatial management measures to protect this endangered species.https://www.int-res.com/abstracts/esr/v40/p149-162/ |
| spellingShingle | EAP Santos ACCD Silva R Sforza FLC Oliveira MI Weber JC Castilhos M López-Mendilaharsu MAAG Marcovaldi RMA Ramos A DiMatteo Olive ridley inter-nesting and post-nesting movements along the Brazilian coast and Atlantic Ocean Endangered Species Research |
| title | Olive ridley inter-nesting and post-nesting movements along the Brazilian coast and Atlantic Ocean |
| title_full | Olive ridley inter-nesting and post-nesting movements along the Brazilian coast and Atlantic Ocean |
| title_fullStr | Olive ridley inter-nesting and post-nesting movements along the Brazilian coast and Atlantic Ocean |
| title_full_unstemmed | Olive ridley inter-nesting and post-nesting movements along the Brazilian coast and Atlantic Ocean |
| title_short | Olive ridley inter-nesting and post-nesting movements along the Brazilian coast and Atlantic Ocean |
| title_sort | olive ridley inter nesting and post nesting movements along the brazilian coast and atlantic ocean |
| url | https://www.int-res.com/abstracts/esr/v40/p149-162/ |
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