Mittwoch, 28 Juni 2017 14:00

THORBJARNARSON, J.B. (2010)

American Crocodile - Crocodylus acutus.

In: Crocodiles.Status Survey and Conservation Action Plan: 46-52.
Third Edition, ed. by S.C. Manolis and C. Stevenson. Crocodile Specialist Group: Darwin

Aus dem Inhalt:

The American crocodile is the most widely distributed of the New World crocodiles, ranging from the southern tip of Florida, along both the Atlantic and Pacifi c coasts of southern Mexico, Central America, and northern South America, as well
as the Caribbean islands of Cuba, Jamaica, and Hispaniola. The habitat of C.  acutus consists largely of brackish water coastal habitats such as the saltwater sections of rivers, coastal lagoons, and mangrove swamps. However, populations are
known from freshwater areas located well inland, including a number of reservoirs. A signifi cant population is known from Lago Enriquillo, a landlocked hypersaline lake situated 40 m below sea level in the arid southwestern Dominican Republic.

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Cuban Crocodile - Crocodylus rhombifer.

In: Crocodiles.Status Survey and Conservation Action Plan: 114-118.
Third Edition, ed. by S.C. Manolis and C. Stevenson. Crocodile Specialist Group: Darwin.

Aus dem Inhalt:

The Cuban crocodile has the smallest known distribution of any extant crocodilian, and is currently restricted to Zapata Swamp  (mainland  Cuba) and Lanier Swamp (Isla de la Juventud). In the recent past the species was more widely distributed on the main island of Cuba. Skeletal material shows that this species was present on the Cayman Islands. The Cuban crocodile population of Zapata Swamp is restricted to a small area of approximately 300 km², on the southwestern portion of the peninsula, where the species is sympatric with the American crocodile (Crocodylus acutus). Lanier Swamp is a small wetland of approximately 100 km², situated on a west-east axis, across the central portion of Isla de la Juventud. Several hundred C. rhombifer have been released in Lanier Swamp since 1994, as part of an ongoing restocking program.

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Donnerstag, 14 Juni 2018 13:33

GARCÍA, G. (2007)

Case report 7 - Montserrat mountain chicken (Leptodactylus fallax): Breeding, reintroduction and other conservation measures.

In: DOLLINGER, P. ed. (2007) Amphibien brauchen unsere Hilfe. Verhandlungsbericht des Amphiobienkurses gemeinsam organisiert mit den Zooverbänden im deutschsprachigen Raum. Chemnitz, 27.-30. Juni 2007. WAZA, Bern: S. 118.

Zusammenfassung der Powerpoint-Präsentation:

The mountain chicken is one of the most threatened amphibians in the world. Its range historically included up to seven, Eastern Caribbean islands but the species is now confined to the islands of Dominica and Montserrat. A combination of hunting, introduced predators and habitat loss was thought to have caused the extirpation of the species from the islands of Guadeloupe, St Kitts and Martinique around 500 years ago.

The wild populations on Montserrat were severely affected when the Soufriere Hills volcano erupted after a 350-year period of dormancy in 1995 and destroyed a significant part of its range. The species distribution on Montserrat has fallen to less than 17km2 and the increasingly toxic, acidified environment may have reduced juvenile survivorship and reproduction. The current status of the Montserrat population is unknown after renewed volcanic eruptions on 13th July 2003 covered the island in a thick layer of ash.  Lately, 2005 and 2006 severe impact of the volcano affected the island again.

Chytrid fungus has been found on the populations of Mountain chickens in Dominica.  Although no cases of chytrid disease have been reported in Montserrat, this island may also be at risk.  If Montserrat is unaffected, frog populations on the island may be the last hope for the survival of the species. 

In collaboration with the Government of Montserrat, Durrell Wildlife has initiated captive breeding of the species, and has also undertaken fieldwork to understand the animal in the wild.

We investigated the presence of disease on mountain chickens and the sympatric species within the Centre Hills in Montserrat. No chytrid or exposure to ranavirus was detected.  We draw tentative conclusions about disease threats to the Montserrat mountain chicken population, and present preliminary recommendations for safeguarding this species.
A major biodiversity assessment effort led by Durrell, the Royal Society for the Protection of Birds (RSPB) and the Montserrat Government has been recently been completed   and is aiding the management and declaration of the Centre Hills as a national park.

 

garcia-biblio

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