the occurrence, impact and management of feral cats and black rats
... most of these were tracked for appreciably less than 10 months). Of these 50 individuals, six were killed by feral cats, by far the largest source of mortality. Dividing the total tracking time (5685 “monitor-days”) by this cat predation rate suggests that a monitor would, on average, be expected to ...
... most of these were tracked for appreciably less than 10 months). Of these 50 individuals, six were killed by feral cats, by far the largest source of mortality. Dividing the total tracking time (5685 “monitor-days”) by this cat predation rate suggests that a monitor would, on average, be expected to ...
Shattered Shells: Pacific Ecosystems in World War II
... saplings, deforming the saplings’ growth and often killing them (211). Invasive species are an underrated problem in any environment, but they are especially threatening on an island where native species’ highly specific niches can be easily usurped by an exotic fiend. Much of an ecosystem’s vitalit ...
... saplings, deforming the saplings’ growth and often killing them (211). Invasive species are an underrated problem in any environment, but they are especially threatening on an island where native species’ highly specific niches can be easily usurped by an exotic fiend. Much of an ecosystem’s vitalit ...
House mouse Scientific name: Mus musculus
... lacking other invasive mammals, while impacts of non‐ insular populations are poorly documented. Several Oceanic islands where mice are the only invasive mammal present have reported a reduction in native vegetation due to seed predation, extinction or reduction of several invertebrate species, ...
... lacking other invasive mammals, while impacts of non‐ insular populations are poorly documented. Several Oceanic islands where mice are the only invasive mammal present have reported a reduction in native vegetation due to seed predation, extinction or reduction of several invertebrate species, ...
Canefield Rat - Northern Territory Government
... trapping generally was lower than on two previous mammal surveys of the islands (in 1966-67 and in 1988). The trapping success was particularly low on South West Island, and was generally low for other „true‟ rat species, Rattus tunneyi and Rattus villosisimus, across the islands. In the 1988 survey ...
... trapping generally was lower than on two previous mammal surveys of the islands (in 1966-67 and in 1988). The trapping success was particularly low on South West Island, and was generally low for other „true‟ rat species, Rattus tunneyi and Rattus villosisimus, across the islands. In the 1988 survey ...
Lecture 2
... Earlier authors considered these marine birds to be most closely related to ‘Pelecaniformes’ or Procellariiformes, but recent phylogenetic analyses suggest sister group to Anseriformes. Plotopteridae: Large Northern penguin-like birds Plotopteridae is the scientific name for the small plotopterid fa ...
... Earlier authors considered these marine birds to be most closely related to ‘Pelecaniformes’ or Procellariiformes, but recent phylogenetic analyses suggest sister group to Anseriformes. Plotopteridae: Large Northern penguin-like birds Plotopteridae is the scientific name for the small plotopterid fa ...
Feral cats – impact and control - Wildlife Research and Management
... A recent Australian study has suggested that the impact of cats on islands is mediated by climate, with extinction only occurring on more arid islands or islands without rockpile shelter. Mainland The feral cat was introduced to mainland Australia by early European settlers and has now spread to occ ...
... A recent Australian study has suggested that the impact of cats on islands is mediated by climate, with extinction only occurring on more arid islands or islands without rockpile shelter. Mainland The feral cat was introduced to mainland Australia by early European settlers and has now spread to occ ...
Desecheo Island, Puerto Rico
... the introduction of invasive rats, the island hosted large colonies of breeding seabirds, including the world’s largest Brown Booby colony and an important Red-footed Booby colony. But, due to the destruction of native vegetation and predation on eggs and chicks by these invasive rats, seabirds no l ...
... the introduction of invasive rats, the island hosted large colonies of breeding seabirds, including the world’s largest Brown Booby colony and an important Red-footed Booby colony. But, due to the destruction of native vegetation and predation on eggs and chicks by these invasive rats, seabirds no l ...
Feral Cats: Consequences for Humans and Wildlife
... blindness, miscarriage, a child born with developmental problems, memory loss, or death. There is also evidence to suggest a link between infection with the parasite and schizophrenia. ...
... blindness, miscarriage, a child born with developmental problems, memory loss, or death. There is also evidence to suggest a link between infection with the parasite and schizophrenia. ...
Anacapa Fact Sheet - Island Conservation
... Thousands of birds use Anacapa Island as a nesting area due to its natural lack of predators. But invasive, non-native black rats were inadvertently brought to Anacapa in the 1940’s aboard ships traveling to the islands. IC and other conservation groups began studying the impact of black rats on nat ...
... Thousands of birds use Anacapa Island as a nesting area due to its natural lack of predators. But invasive, non-native black rats were inadvertently brought to Anacapa in the 1940’s aboard ships traveling to the islands. IC and other conservation groups began studying the impact of black rats on nat ...
By the end of this session I should be able to:
... • The sea cucumber and sharks of the Galapagos have become alarming targets, both popular in Asian markets for their aphrodisiac or medicinal qualities. SO WHAT DO WE DO?? • National Park service banned all fishing of sea cucumbers in the Galapagos. • Fishermen were not filled with enthusiasm. • Ang ...
... • The sea cucumber and sharks of the Galapagos have become alarming targets, both popular in Asian markets for their aphrodisiac or medicinal qualities. SO WHAT DO WE DO?? • National Park service banned all fishing of sea cucumbers in the Galapagos. • Fishermen were not filled with enthusiasm. • Ang ...
Theory of Island Biogeography Rescue effect _____ Target effect
... relatively isolated patches of small size should result in decrease in species richness through time (‘relaxation’ hypothesis), as the more resource-demanding species (e.g. large carnivores) become extinct. ...
... relatively isolated patches of small size should result in decrease in species richness through time (‘relaxation’ hypothesis), as the more resource-demanding species (e.g. large carnivores) become extinct. ...
Special Importance Threats
... lower mandible, which is used for feeding offspring. The young will peck at the red spot with their bill, causing the parent to regurgitate the food they have just brought back to the nest. ...
... lower mandible, which is used for feeding offspring. The young will peck at the red spot with their bill, causing the parent to regurgitate the food they have just brought back to the nest. ...
annual report - Pacific Rim Conservation
... fenced. On West Maui petrels were detected at six sites, once of which in high enough call rates to suggest breeding. Newell’s Shearwaters were detected at two sites, but with low call rates. On Hawaii Island both Shearwaters and Petrels were detected in variable densities in Puu Oumi Natural Area R ...
... fenced. On West Maui petrels were detected at six sites, once of which in high enough call rates to suggest breeding. Newell’s Shearwaters were detected at two sites, but with low call rates. On Hawaii Island both Shearwaters and Petrels were detected in variable densities in Puu Oumi Natural Area R ...
Limiting Factors of Population Growth
... Introduced arctic fox taking an auklet, a seabird breeding in the Aleutian Islands, Alaska Maritime National Wildlife Refuge. Fox predation decimated seabird populations and reduced the guano supplied by seabirds to the Aleutians, transforming the vegetation on the islands from productive plant com ...
... Introduced arctic fox taking an auklet, a seabird breeding in the Aleutian Islands, Alaska Maritime National Wildlife Refuge. Fox predation decimated seabird populations and reduced the guano supplied by seabirds to the Aleutians, transforming the vegetation on the islands from productive plant com ...
PREDATORS
... IUCN database of known extinctions of species over the past 500 years reveals that most have occurred on islands and that terrestrial vertebrates have disproportionately gone extinct, compared with plants. This analysis also reveals that predation (by itself or in combination with other factors) has ...
... IUCN database of known extinctions of species over the past 500 years reveals that most have occurred on islands and that terrestrial vertebrates have disproportionately gone extinct, compared with plants. This analysis also reveals that predation (by itself or in combination with other factors) has ...
Acknowledgements and literature cited
... diverse biota from Kaua`i and its transformation since human arrival. Ecological Monographs 71: 615-641. Butchart, S. H. M., A. J. Stattersfield, and N. J. Collar. 2006. How many bird extinctions have we prevented? Oryx 40: 266-278. Côté, I. M., and W. J. Sutherland. 1997. The effectiveness of remov ...
... diverse biota from Kaua`i and its transformation since human arrival. Ecological Monographs 71: 615-641. Butchart, S. H. M., A. J. Stattersfield, and N. J. Collar. 2006. How many bird extinctions have we prevented? Oryx 40: 266-278. Côté, I. M., and W. J. Sutherland. 1997. The effectiveness of remov ...
Cat eradication significantly decreases shearwater mortality
... Island, Baja California Sur, Mexico. After this study was completed cats were eradicated from Natividad Island as part of an island restoration programme (Wood et al., 2002). In this note we report new data from Natividad Island that provides post-eradication estimates of seabird mortality and demon ...
... Island, Baja California Sur, Mexico. After this study was completed cats were eradicated from Natividad Island as part of an island restoration programme (Wood et al., 2002). In this note we report new data from Natividad Island that provides post-eradication estimates of seabird mortality and demon ...
Seabirds of the Hauraki Gulf
... can forage for food over hundreds, and sometimes thousands, of kilometres offshore, coming ashore only to breed. When their ...
... can forage for food over hundreds, and sometimes thousands, of kilometres offshore, coming ashore only to breed. When their ...
Isles of Shoals - New Hampshire Bird Records
... year since (high of 100 pairs in 2004). These numbers make Seavey Island one of the largest Roseate colonies in the Northeast. Arctic Tern (state special concern) – Between 1 and 7 pairs have nested here since 2002. The Isles of Shoals is near the southern edge of this species’ range, so a large col ...
... year since (high of 100 pairs in 2004). These numbers make Seavey Island one of the largest Roseate colonies in the Northeast. Arctic Tern (state special concern) – Between 1 and 7 pairs have nested here since 2002. The Isles of Shoals is near the southern edge of this species’ range, so a large col ...
Macquarie Island - Rabbit Impact and Management Fact Sheet
... Rabbits not only eat and damage leaves, they destroy flowers, kill seedlings, destroy root systems and cause erosion of the steep peat-covered slopes. Rabbits also change the distribution of plant communities on the island by transporting seeds in their fur and enabling plant species that are less p ...
... Rabbits not only eat and damage leaves, they destroy flowers, kill seedlings, destroy root systems and cause erosion of the steep peat-covered slopes. Rabbits also change the distribution of plant communities on the island by transporting seeds in their fur and enabling plant species that are less p ...
Danger to native species N4/5
... surviving tough winter conditions. On top of this, competition is increased by their ability to produce more young and live at higher densities. However, rivalry between the species is not the only problem. Grey squirrels are carriers of the Squirrel pox virus, which the reds have no immunity to. It ...
... surviving tough winter conditions. On top of this, competition is increased by their ability to produce more young and live at higher densities. However, rivalry between the species is not the only problem. Grey squirrels are carriers of the Squirrel pox virus, which the reds have no immunity to. It ...
HOW CAN THE YELKOUAN SHEARWATER SURVIVE FERAL CAT PREDATION?
... A demographic model was created using data for P. yelkouan and for closely related shearwater species. Without cat predation, only two of four survival rate scenarios led to a mean growth rate λ ≥ 1. The model was constrained to have a stable population growth rate and used to predict predation scen ...
... A demographic model was created using data for P. yelkouan and for closely related shearwater species. Without cat predation, only two of four survival rate scenarios led to a mean growth rate λ ≥ 1. The model was constrained to have a stable population growth rate and used to predict predation scen ...
Successful start to conservation project
... Records show that common tern nests in the area previously totalled 330 but by 1998 that number had slumped to just two. The conservation project is focusing on protecting seabirds such as terns, gulls, black guillemot and the rare black throated diver. In the case of black guillemot, which nests in ...
... Records show that common tern nests in the area previously totalled 330 but by 1998 that number had slumped to just two. The conservation project is focusing on protecting seabirds such as terns, gulls, black guillemot and the rare black throated diver. In the case of black guillemot, which nests in ...
Introduced herbivores and their management in
... the conference was to initiate a discussion on the state of knowledge of invasive herbivores in the Andaman Islands and to consider management strategies for these species. Management authorities, scientific and academic institutions, environmental NGOs, one animal welfare organization and students ...
... the conference was to initiate a discussion on the state of knowledge of invasive herbivores in the Andaman Islands and to consider management strategies for these species. Management authorities, scientific and academic institutions, environmental NGOs, one animal welfare organization and students ...
Yellow indicates student papers
... APPLICATIONS OF A MODEL-BASED U.S. ATLANTIC COAST-WIDE SYNTHESIS OF AT-SEA MARINE BIRD DISTRIBUTIONS TO OCEAN ENERGY SPATIAL PLANNING Brian Kinlan, Arliss Winship, Robert Rankin, Peter Miller, & John Christensen ...
... APPLICATIONS OF A MODEL-BASED U.S. ATLANTIC COAST-WIDE SYNTHESIS OF AT-SEA MARINE BIRD DISTRIBUTIONS TO OCEAN ENERGY SPATIAL PLANNING Brian Kinlan, Arliss Winship, Robert Rankin, Peter Miller, & John Christensen ...
Introduced mammals on seabird breeding islands
Seabirds include some of the most threatened taxa anywhere in the world. For example, of extant albatross species, 82% are listed as threatened, endangered, or critically endangered by the International Union for Conservation of Nature. The two leading threats to seabirds are accidental bycatch by commercial fishing operations and introduced mammals on their breeding islands. Mammals are typically brought to remote islands by humans either accidentally as stowaways on ships, or deliberately for hunting, ranching, or biological control of previously introduced species. Introduced mammals have a multitude of negative effects on seabirds including direct and indirect effects. Direct effects include predation and disruption of breeding activities, and indirect effects include habitat transformation due to overgrazing and major shifts in nutrient cycling due to a halting of nutrient subsidies from seabird excrement. There are other invasive species on islands that wreak havoc on native bird populations (e.g. brown snakes on Guam), but mammals are by far the most commonly introduced species to islands and the most detrimental to breeding seabirds. Despite efforts to remove introduced mammals from these remote islands, invasive mammals are still present on roughly 80% of islands worldwide.