César J. Pollo

Guide of Amphibians and Reptiles of São Tomé and Príncipe (eBook, ePUB)

• Format: ePub

Produktbeschreibung

The Gulf of Guinea oceanic islands (Príncipe, São Tomé and Annobón) are the result of volcanic activity of the Cameroon Volcanic Line that occurred along this fracture in the earth's crust during the lower Tertiary and early Quaternary and that continues inland as the Cameroon/Nigerian mountains.
They are located between 220 and 350 kilometers from the western coast of Central Africa and have never been in contact with the mainland. The three islands are separated from each other and from the West African coastlines by ocean depths in excess of 3000 m.
São Tomé is geologically younger than Príncipe and considerably larger, at 836 km2, is situated 280 km off the mainland and 180 km northeast of the southern-most of the oceanics. Príncipe has only about 136 km2 in area, but it is well-watered and has significant relief provided by a central volcanic peak, it is about 146 km northeast of São Tomé, 220 km from de African mainland and 220 km southwest of Bioko (known in colonial times as Fernando Poo and now part of the Republic of Equatorial Guinea).
The herpetofauna of these islands includes 27 species of reptiles, 18 of which are currently considered to be endemic and eight species of endemic amphibians of five families. The cryptic diversity within the islands populations only recently began to be addressed. Due to this, several new species have been described in recent years, while others are currently on the process of being described, as well as it undermines efforts to apply successful and appropriated conservation strategies.
These islands harbour a diverse amphibian fauna, seven frogs and one caecilian, the rate of endemism of amphibians in São Tomé e Príncipe is 100%. Amphibian's endemism on the islands are: Leptopelis palmatus, considered a classic example of island gigantism, that lives in the lowland forests and Phrynobatrachus dispar and Hyperolius drewesi only found on Príncipe. Hyperolius thomensis, Phrynobatrachus leveleve, Ptychadena newtoni and Schistometopum thomense have only been found on São Tomé. The genus Hyperolius is endemic to the two islands.
For reptiles, aside from Hemidactylus longicephalus and Pelusios castaneus on São Tomé, Trachylepis cf. affinis in Príncipe, and Hemidactylus mabouia and Boaedon cf. fuliginosus on both islands, all other reptile species appear to be endemics, Hemidactylus and Lygodactylus geckos, Panaspis skinks and various snakes, Philothamnus thomensis, Philothamnus girardi (Annobón), Hapsidophrys principis, etc.
The reptiles and amphibians of the Gulf of Guinea islands pose some of the most difficult questions with respect to colonization. Some genetic analysis indicates that some of these species appear to have their closest relatives in East Africa.
São Tomé and Príncipe is a breeding place for five of the seven known species of marine turtles in the world, has one of the 11 populations with maximum risk of extincion worldwide, turtle population of the critically endangered Hawksbill (Eretmochelys imbricata), the only viable nesting population in the Eastern Atlantic. Príncipe Island possesses one of the last sea turtle aggregations in West Africa. Despite its high conservation value, local and regional information on their numbers and habitats remains scarce.

---

Dieser Download kann aus rechtlichen Gründen nur mit Rechnungsadresse in A, B, CY, CZ, D, DK, EW, E, FIN, F, GR, H, IRL, I, LT, L, LR, M, NL, PL, P, R, S, SLO, SK ausgeliefert werden.

Produktdetails

• Verlag: César J. Pollo
• Erscheinungstermin: 23. Februar 2018
• Englisch
• ISBN-13: 9781370487394
• Artikelnr.: 70645908

Autorenporträt

Más de 25 años de experiencia en diferentes sectores del medio ambiente y desde distintos ámbitos de trabajo, consultoría, administración pública y organizaciones no gubernamentales.
He desarrollado y desarrollo mi trabajo profesional en temas relacionadas con el medio natural, proyectos LIFE, planes de recuperación y estrategias de especies amenazadas, daños de fauna, etc., y en la redacción y propuesta de medidas correctoras y compensatorias a proyectos de infraestructuras y de explotación de recursos naturales, para su incorporación en declaraciones de impacto ambiental e informes ambientales.
En la actualidad interesado por la sostenibilidad ambiental, los objetivos de desarrollo sostenible, los bancos de conservación o de hábitats, la conectividad, las medidas compensatorias, la gestión de especies amenazadas, el comercio internacional de especies, el turismo de naturaleza y la custodia del territorio. Y aficionado a la historia.
Aunque por mi edad soy un inmigrante digital, también estoy interesado en el desarrollo de proyectos de empresas sociales, culturales y medioambientales con una base digital y en Responsabilidad Social Empresarial.
Experiencia en el diseño y ejecución de iniciativas de apoyo a la realización de proyectos que impulsen el progreso sostenible y el bienestar de comunidades locales en países en vías de desarrollo, mediante el uso racional, viable, sano, justo y ético de los recursos naturales.
Conocimiento y formación en seguridad operativa sobre el terreno para ONGs, planificación y prevención, diferentes situaciones de riesgo y peligro, análisis de riesgos, estrategias de seguridad, niveles de alerta, seguridad personal individual y colectiva, seguridad en inmuebles, gestión de la información, uso y desplazamiento de vehículos, aplicación de SIG a gestión de riesgos naturales, etc.