Contrasted associations between seabirds and marine mammals
... to observe consumers in the absence of their food; for this reason, a fundamental assumption for this study was that every predator seen at sea was searching for food. We excluded from the analyses all animals which had a noticeable interaction behaviour with the ship (ship followers, accompaniers a ...
... to observe consumers in the absence of their food; for this reason, a fundamental assumption for this study was that every predator seen at sea was searching for food. We excluded from the analyses all animals which had a noticeable interaction behaviour with the ship (ship followers, accompaniers a ...
A Multidisciplinary Approach to the Analysis of Multifactorial Land
... The diagram shows the influence and control exercised by specific factors on the different records and the interconnections and data flows between the different fields of research. Theoretical models of insular colonization should be based on inferences drawn from two sets of data: (1) the evidence ...
... The diagram shows the influence and control exercised by specific factors on the different records and the interconnections and data flows between the different fields of research. Theoretical models of insular colonization should be based on inferences drawn from two sets of data: (1) the evidence ...
the use of rodenticides for conservation efforts
... predator-free environment. Fortunately, practitioners have developed techniques to eradicate introduced rodents, allowing ecosystems to recover. Rodenticides have proven an effective tool in eradications, having been used in over 300 successful eradications worldwide. Careful planning, adequate reso ...
... predator-free environment. Fortunately, practitioners have developed techniques to eradicate introduced rodents, allowing ecosystems to recover. Rodenticides have proven an effective tool in eradications, having been used in over 300 successful eradications worldwide. Careful planning, adequate reso ...
Marine animals Published: 06/08/2009 Size: 1403kb Type
... It is fitting that we have a rich and diverse coastal fauna. Our inshore waters are home to a variety of seabirds, mammals, invertebrates (insects) and crustaceans. Many of them are unique to our country. Some of them have specific habitat and environmental requirements and are found only in localis ...
... It is fitting that we have a rich and diverse coastal fauna. Our inshore waters are home to a variety of seabirds, mammals, invertebrates (insects) and crustaceans. Many of them are unique to our country. Some of them have specific habitat and environmental requirements and are found only in localis ...
White-chinned Petrel Procellaria aequinoctialis
... The distribution and abundance of P. aequinoctialis off western South America was examined over several seasons by Spear et al. (2005) [58]. Procellaria aequinoctialis were observed in high densities near the continental slope in spring (breeding) and autumn (non-breeding) rather than in the pelagic ...
... The distribution and abundance of P. aequinoctialis off western South America was examined over several seasons by Spear et al. (2005) [58]. Procellaria aequinoctialis were observed in high densities near the continental slope in spring (breeding) and autumn (non-breeding) rather than in the pelagic ...
Canterbury`s Marine and Coastal Animals
... humpbacks migrate thousands of kilometres (710,000 km/yr) between summer feeding grounds around the Pacific Islands, and winter breeding and calving grounds in the Sub-Antarctic. ...
... humpbacks migrate thousands of kilometres (710,000 km/yr) between summer feeding grounds around the Pacific Islands, and winter breeding and calving grounds in the Sub-Antarctic. ...
Population dynamics of shrews on small islands
... isolation as independent variables explained 6 1yoof the variation in the epigenetic divergence (Table 3 ) . There are no reasons to believe that the divergence is due to mechanisms other than genetic drift. The area effect thus stems from larger islands having larger effective population sizes and ...
... isolation as independent variables explained 6 1yoof the variation in the epigenetic divergence (Table 3 ) . There are no reasons to believe that the divergence is due to mechanisms other than genetic drift. The area effect thus stems from larger islands having larger effective population sizes and ...
Now you see them, now you don`t! – population crashes of
... present in New South Wales well before C. capitata invaded. The medfly was largely replaced in the lowland Hawaiian islands after the arrival of the Oriental fruit fly (Bactrocera dorsalis), apparently by a larval interaction (Keiser et al. 1974) of somewhat mysterious mechanism; Bateman (1977) sugg ...
... present in New South Wales well before C. capitata invaded. The medfly was largely replaced in the lowland Hawaiian islands after the arrival of the Oriental fruit fly (Bactrocera dorsalis), apparently by a larval interaction (Keiser et al. 1974) of somewhat mysterious mechanism; Bateman (1977) sugg ...
Invasive Predatory Small Mammals on Islands Strategy
... adult birds and take eggs from nest sites. Worldwide, invasive mammal species have lead to the decline, extirpation and/or total extinction of bird and other species through predation and competition. In Europe for example, American mink predation has caused the decimation of seabird colonies and re ...
... adult birds and take eggs from nest sites. Worldwide, invasive mammal species have lead to the decline, extirpation and/or total extinction of bird and other species through predation and competition. In Europe for example, American mink predation has caused the decimation of seabird colonies and re ...
Society for Conservation Biology The Wildlife Society
... levels that create areas of abnormally high predation rates on wildlife. Studies show that even well fed cats continue to hunt and kill small mammals, birds, reptiles, and insects.3 Feral cats are an invasive problem on many Department of Interior (DOI) lands. For example, in the Florida Keys, the ...
... levels that create areas of abnormally high predation rates on wildlife. Studies show that even well fed cats continue to hunt and kill small mammals, birds, reptiles, and insects.3 Feral cats are an invasive problem on many Department of Interior (DOI) lands. For example, in the Florida Keys, the ...
Severity of the Effects of Invasive Rats on Seabirds: A Global Review
... introduction. For example, for rat introductions stated as before 1700, we used 1650 as the time of introduction. Time since introduction categories were large enough to ensure that these adjustments did not transfer data points from one category to another. To ensure that our selected categories di ...
... introduction. For example, for rat introductions stated as before 1700, we used 1650 as the time of introduction. Time since introduction categories were large enough to ensure that these adjustments did not transfer data points from one category to another. To ensure that our selected categories di ...
Banded Hare-wallaby - Department of Parks and Wildlife
... On the islands, they shelter among dense shrubs. Several individuals are often found within one patch of scrubland. ...
... On the islands, they shelter among dense shrubs. Several individuals are often found within one patch of scrubland. ...
Report of the Working Group on Seabird Ecology (WGSE)
... Quantifying this balance of increased competition versus increased food intake is logistically difficult, even if using photography or video. Events simply transpire too fast. An open area for research is to determine by how much a bird’s fitness increases through local enhancement, or at least how ...
... Quantifying this balance of increased competition versus increased food intake is logistically difficult, even if using photography or video. Events simply transpire too fast. An open area for research is to determine by how much a bird’s fitness increases through local enhancement, or at least how ...
Whatever happened to the Floreana Mockingbird?
... 1believe this is an inadequate explanation for the extinction of N. trifasciatus on Floreana for two reasons. First, N. trifasciatus is not as dependent on Opuntia as Steadman has implied. On Champion 1have found successful nests of this mockingbird species situated in trees other than Opuntia, incl ...
... 1believe this is an inadequate explanation for the extinction of N. trifasciatus on Floreana for two reasons. First, N. trifasciatus is not as dependent on Opuntia as Steadman has implied. On Champion 1have found successful nests of this mockingbird species situated in trees other than Opuntia, incl ...
Invasive Animals Cooperative Research Centre
... plan for predation by feral cats’, which sets out a national framework to guide response to the impacts of feral cats on biodiversity. WHO: Australia’s leading feral cat researchers, scientists, NGO’s, ecologists and the Threatened Species Commissioner will attend. Topics will include feral cat impa ...
... plan for predation by feral cats’, which sets out a national framework to guide response to the impacts of feral cats on biodiversity. WHO: Australia’s leading feral cat researchers, scientists, NGO’s, ecologists and the Threatened Species Commissioner will attend. Topics will include feral cat impa ...
Submission to Draft threat abatement plan for predation by feral cats
... There is a general pattern of poor implementation of federal threat abatement plans, which raises questions about the effectiveness of the threat abatement planning process. Because TAPs are developed by the ...
... There is a general pattern of poor implementation of federal threat abatement plans, which raises questions about the effectiveness of the threat abatement planning process. Because TAPs are developed by the ...
Ecological Decay on Isolated Forest Fragments
... young leaf-cutter ant colonies) and agoutis (Dasyprocta sp., the only known effective seed dispersers of Hymenaea courbaril trees). Armadillos are known to occur at low densities on large and medium islands but do not occur on small islands Density information for two of the three dominant herbivore ...
... young leaf-cutter ant colonies) and agoutis (Dasyprocta sp., the only known effective seed dispersers of Hymenaea courbaril trees). Armadillos are known to occur at low densities on large and medium islands but do not occur on small islands Density information for two of the three dominant herbivore ...
The impact of fox and feral cat predation
... al. 2011). For instance, periodic presence (once every two years) of Arctic foxes Alopus lagopus on the Gannet Islands (Labrador, Canada) resulted in the estimated abandonment of over 2 500 nests of Razorbills Alca torda, which represented more than 25% of the breeding population (Birkhead & Nettles ...
... al. 2011). For instance, periodic presence (once every two years) of Arctic foxes Alopus lagopus on the Gannet Islands (Labrador, Canada) resulted in the estimated abandonment of over 2 500 nests of Razorbills Alca torda, which represented more than 25% of the breeding population (Birkhead & Nettles ...
Coquí, Virgin Islands
... Virgin Islands coqui (Hedges and Thomas 2008; Platenberg 2007). Rats and mongoose may also predate on the species (ARKive, undated). The potential spread of the fungus chytridiomycosis could also be a concern for coqui (ARKive, undated). (Factor D) The Inadequacy of Existing Regulatory Mechanisms Th ...
... Virgin Islands coqui (Hedges and Thomas 2008; Platenberg 2007). Rats and mongoose may also predate on the species (ARKive, undated). The potential spread of the fungus chytridiomycosis could also be a concern for coqui (ARKive, undated). (Factor D) The Inadequacy of Existing Regulatory Mechanisms Th ...
View or download Duffy, D.C. and W.R. Siegfried. 1987. Historical variations in food consumption by breeding seabirds of the Humboldt and Benguela upwelling regions. IN Croxall, J. P. (Ed.) Seabirds: feeding biology and role in marine ecosystems
... Estimates of food consumption by seabirds arc necessary for the management of many commercially important fish species and the ecosystems in which they live. Cohort or Virtual Population Analysis (VPA) (Ricker. 1975), widely used to estimate the sizes of fish stocks. is dependent on estimates of mor ...
... Estimates of food consumption by seabirds arc necessary for the management of many commercially important fish species and the ecosystems in which they live. Cohort or Virtual Population Analysis (VPA) (Ricker. 1975), widely used to estimate the sizes of fish stocks. is dependent on estimates of mor ...
Ecological Structure of the Pelagic Seabird
... total number of successful avian morphotypes in a community, will have been selected over a long time and a wide geographical range (especially for seabirds). Since any comn~unitystudy can include only a small part of a n animal's evolutionary histol-y, a species' presence at a particular place and ...
... total number of successful avian morphotypes in a community, will have been selected over a long time and a wide geographical range (especially for seabirds). Since any comn~unitystudy can include only a small part of a n animal's evolutionary histol-y, a species' presence at a particular place and ...
Breeding seabirds on the Isles of Scilly
... The Eastern Isles low-lying, the last two frequently inundated by Far less rugged than the westernmost islands, high spring tides. There tends to be much the Eastern Isles are rather similar in form to interchange of birds between them and so the Samson, consisting of tall hills sweeping gently isla ...
... The Eastern Isles low-lying, the last two frequently inundated by Far less rugged than the westernmost islands, high spring tides. There tends to be much the Eastern Isles are rather similar in form to interchange of birds between them and so the Samson, consisting of tall hills sweeping gently isla ...
Update On Seabird Breeding Colonies in the Lesser Antilles
... difficult to determine due to a lack of research on the species. Audubon’s Shearwaters only return to their burrows at night, making them difficult to locate. Chicks and eggs are susceptible to predation by introduced predators such as cats and rats, which may be causing a decline in the population ...
... difficult to determine due to a lack of research on the species. Audubon’s Shearwaters only return to their burrows at night, making them difficult to locate. Chicks and eggs are susceptible to predation by introduced predators such as cats and rats, which may be causing a decline in the population ...
Recovery of Native Species following Rat
... Abstract: Rats were eradicated from Mokoli‘i, a 1.6-ha island off the east shore of O‘ahu, using snap traps, cage traps, and diphacinone bait stations. A total of 18 black rats (Rattus rattus) were caught, and 354 bait blocks were used. There was no sign of rats on the island after 27 May 2002. Wedg ...
... Abstract: Rats were eradicated from Mokoli‘i, a 1.6-ha island off the east shore of O‘ahu, using snap traps, cage traps, and diphacinone bait stations. A total of 18 black rats (Rattus rattus) were caught, and 354 bait blocks were used. There was no sign of rats on the island after 27 May 2002. Wedg ...
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.