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| Tinhosas Islands | |
|---|---|
| Name | Tinhosas Islands |
| Native name | Ilhéus Tinhosas |
| Location | Atlantic Ocean |
| Archipelago | Cape Verde |
| Area km2 | 0.08 |
| Country | Cape Verde |
| Protected area | Biosphere Reserve |
Tinhosas Islands are a pair of small, uninhabited islets in the central Atlantic Ocean off the coast of Boa Vista in the Cape Verde archipelago. The islets lie within the territorial waters of Cape Verde and form part of an internationally recognized seabird nesting site associated with wider conservation efforts in the region. Their remoteness and lack of permanent human settlement have made them important for research and protection by national and international organizations.
The islets are located near the eastern rim of the Atlantic Ocean basin, off the shore of Boa Vista, and are the westernmost feature of a chain that includes Sal, Santiago, São Vicente, and Fogo within the Cape Verde group. Geographically they are rocky outcrops composed of volcanic basalt similar to substrates found on Fogo and Brava, with elevation and area comparable to other small Atlantic islets such as Desertas Islands and Ilhéu de Cima. The surrounding waters fall within oceanographic regimes tied to the Canary Current and influence from the North Atlantic Gyre, affecting local marine productivity and seabird foraging ranges.
Historically, the islets were charted during the period of Portuguese exploration associated with figures like Prince Henry the Navigator and colonial administrations based in Lisbon. Their recorded history is closely tied to maritime navigation routes between Lisbon and the West African coast, and later to scientific expeditions from institutions such as the Royal Society and natural history museums in Paris and London. During the 19th and 20th centuries, colonial authorities in Portuguese Empire lists of possessions administered the islets together with nearby islands like Boa Vista and Maio. Modern recognition of their ecological value led to inclusion in conservation frameworks promoted by UNESCO and agreements advocated by BirdLife International and the IUCN.
The islets are renowned as critical breeding sites for seabirds such as Cory's shearwater (Calonectris borealis), Brown booby (Sula leucogaster), and Loggerhead sea turtle (Caretta caretta) nesting nearby; they are also used by migratory species traversing routes connecting Europe, West Africa, and the Americas. Vegetation is sparse, featuring hardy coastal flora comparable to communities recorded on Boa Vista and Sal, and supports invertebrate assemblages studied by researchers from institutions like the University of Cape Verde and the Natural History Museum, London. Marine ecosystems adjacent to the islets host assemblages of reef fishes similar to those documented around Madeira, Canary Islands, and Azores archipelagos, and are influenced by pelagic species such as tuna and migratory sharks observed by oceanographers from Scripps Institution of Oceanography and Woods Hole Oceanographic Institution.
Protection measures have been implemented through national legislation of Cape Verde and international designations promoted by organizations including UNESCO, Ramsar, BirdLife International, and the IUCN. The islets are part of marine protected area initiatives coordinated with agencies such as the Ministry of Environment of Cape Verde and scientific partners including Conservation International and regional NGOs. Conservation actions focus on invasive species control modeled on eradication programs used on islands like Gough Island and South Georgia, habitat monitoring techniques applied by RSPB, and enforcement of protections against illegal fishing following protocols recommended by IMO and CBD frameworks.
Access to the islets is restricted for conservation purposes, regulated by authorities in Praia and enforcement partners such as the Cape Verdean Coast Guard and maritime agencies cooperating with regional bodies like the African Union. Scientific expeditions require permits from national institutes including the University of Cape Verde and coordination with international research centers such as the Smithsonian Institution and CNRS teams. Administrative oversight ties into broader territorial management of Boa Vista municipality and national policy instruments influenced by agreements signed in capitals like Lisbon and multilateral environmental meetings held under UNEP and CBD auspices.
Category:Islands of Cape Verde Category:Uninhabited islands Category:Important Bird Areas