Skip to main content

Search the SPREP Catalogue

Refine Search Results

Tags / Keywords

Available Online

Tags / Keywords

Available Online

8166 result(s) found.

Sort by

You searched for

  • Tags / Keywords pacific
    X
Recovery and current status of seabirds on the Baja California Pacific Islands, Mexico, following restoration actions
Biodiversity Conservation, BRB
Available Online

Aguilar-Vargas, A.

,

Aguirre-Muñoz, A.

,

Aztorga-Ornelas, A.

,

Bedolla-Guzmán, Y.

,

Bravo-Hernández, E.

,

Corrales-Sauceda, M.

,

Cárdenas-Tapia, A.

,

Fabila-Blanco, A.

,

Félix-Lizárraga, M.

,

Hernández-Montoya, J.

,

Hernández-Ríos, A.

,

Latofski-Robles, M.

,

Luna-Mendoza, L.

,

Méndez-Sánchez, F.

,

Ortiz-Alcaraz, A.

,

Rojas-Mayoral, E.

,

Solís-Carlos, F.

,

Torres-García, F.

2019
The Baja California Pacifc Islands, Mexico, are globally important breeding sites for 22 seabird species and subspecies. In the past, several populations were extirpated or reduced due to invasive mammals, human disturbance, and contaminants. Over the past two decades, we have removed invasive predators and, for the last decade, we have been implementing a Seabird Restoration Programme on eight groups of islands: Coronado, Todos Santos, San Martín, San Jerónimo, San Benito, Natividad, San Roque, and Asunción. This programme includes monitoring; social attraction techniques; removal of invasive vegetation; reducing human disturbance; and an environmental learning and biosecurity programme. Here, we summarise historical extirpations and recolonisations during the last two decades of restoration actions, and we update the status of breeding species after more than a decade. To date, from 27 historically extirpated populations, 80% have returned since the ?rst eradication in 1995. Social attraction techniques were key in recolonisations of Cassin’s auklet (Ptychoramphus aleuticus), royal tern (Thalasseus maximus), and elegant tern (T. elegans). A total of 19 species breed on these islands, four more species than a decade ago, including 12 new records. The most abundant seabirds, black-vented shearwater (Puffnus opisthomelas), Cassin’s auklet, western gull (Larus occidentalis), and Brandt’s cormorant (Phalacrocorax penicillatus), have shown a remarkable population increase. Current threats include the potential reintroduction of invasive mammals, guano mining, recreational activities, pollution, and commercial ?sheries. To maintain these conservation gains in the long-term it is necessary to continue implementing restoration actions and reinforcing protection on these important natural protected areas.
Biology and Impacts of Pacific Island Invasive Species. 15.Psittacula krameri, the Rose-Ringed Parakeet (Psittaciformes: Psittacidae)
BRB
Available Online

Kalodimos, N.

,

Shiels, A.

2019
The rose-ringed parakeet (RRP), Psittacula krameri, has become established in at least four Pacific Island countries (Hong Kong China, Japan, New Zealand, U.S.A.), including the Hawaiian islands of Kaua‘i, O‘ahu, and Hawai‘i. Most Pacific islands are at risk of RRP colonization. This species was first introduced to Hong Kong in 1903 and Hawai‘i in the 1930s–1960s, established since 1969 in Japan, and in New Zealand since 2005 where it has repeatedly established after organized removals. The founding birds were imported cage-birds from the pet trade. In native India, RRP are generally found associated with human habitation and are considered a severe agricultural pest. In the Hawaiian Islands, RRP are increasing and expanding their geographic ranges below 500m elevation. Population estimates in 2018 on Kaua‘i were ?6,800 birds, which was a three-fold increase and a 22.5% annual growth rate in the prior 6 years, whereas O‘ahu had ?4,560 birds with a 21% annual growth rate the prior 9 years; these rates suggest a population doubling time of ?3.5 years. Wild RRP can live 14+ years, can reproduce after 1.5 years, and have few effective predators. Breeding pairs produce 1–3 fledglings annually. RRP are seed predators and rarely seed dispersers; their flock-foraging behavior can result in severe damage to orchard and field agricultural crops including tropical fruit and corn (Zea mays), and such economic damages are especially pronounced on Kaua‘i. Island societies should prevent new introductions and consider RRP deterrents and population control methods to protect resources.