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Academic literature on the topic 'Quokka'

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Published: 4 June 2021
Last updated: 31 January 2023

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Journal articles on the topic "Quokka"

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McLean, I. G., and N. T. Schmitt. "Copulation and Associated Behaviour in The Quokka, Setonix brachyurus." Australian Mammalogy 21, no. 1 (1999): 139. http://dx.doi.org/10.1071/am99139.

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While preparing a review of published descriptions of copulatory behaviour in macropod marsupials (McLean, Lundie-Smith and Jarman 1993), we were surprised to find no description for one of the most studied species, the quokka (Setonix brachyurus, e.g. see Bradshaw 1983). Copulating quokkas have been seen previously by researchers (e.g. Kitchener 1970), but no account was given. Here we provide descriptions of copulatory behaviour in quokkas, and comment on levels of sexual behaviour and activity by quokkas in the wild and in captivity.
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Alacs, Erika, Deryn Alpers, Paul J. de Tores, Mick Dillon, and Peter B. S. Spencer. "Identifying the presence of quokkas (Setonix brachyurus) and other macropods using cytochrome b analyses from faeces." Wildlife Research 30, no. 1 (2003): 41. http://dx.doi.org/10.1071/wr01109.

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Non-invasive methods have the potential to circumvent problems associated with using more traditional techniques when surveying for rare and elusive species. In this study, non-invasive molecular-based methods have been used to analyse the scats of several species of marsupials. DNA was successfully extracted from scats of the quokka, Setonix brachyurus, and three other macropods (Macropus fuliginosus, M. irma and M. eugenii) sympatric with the quokka and with similar-appearing scats. Partial sequence from the mitochondrial cytochrome b gene from these four species and seven other macropods was used to measure genetic differentiation among them to determine whether the quokka could be unambiguously identified from the scats alone. The results confirm that molecular approaches can be used for macropod species identification using scats as the source material. The approach will have potential survey and management applications, and, more specifically, may lead to more accurate assessment of the quokka's geographic range, leading to implementation of more appropriate management strategies for its conservation.
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Spencer, Peter B. S., Karlene Bain, Matthew W. Hayward, Mia Hillyer, and J. A. Tony Friend. "Persistence of remnant patches and genetic loss at the distribution periphery in island and mainland populations of the quokka." Australian Journal of Zoology 67, no. 1 (2019): 38. http://dx.doi.org/10.1071/zo19055.

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Understanding the spatial structure of populations is important in developing effective management options for threatened species, and for managing habitat connectivity for metapopulation function, and for demographic and genetic heterogeneity. We used genetic information to investigate the structure of populations of the quokka, Setonix brachyurus, in south-west Western Australia. We hypothesised that movement between known populations would be relatively rare and result in significant genetic structuring. Genetic analyses from 412 adult individuals at 14 nuclear markers (microsatellite) from 33 sampling locations identified structure, diversity and spatial separation of quokkas across their mainland distribution and on two islands. We identified nine inferred (K = 9) populations of quokka that would be otherwise difficult to define with standard ecological techniques. The highest genetic diversity was evident in a large central population of quokka in the southern forest area and genetic diversity was lower at the peripheries of the distribution. The Rottnest Island population contained 70% of the genetic diversity of the mainland populations but the genetic diversity of animals on Bald Island was markedly lower. Populations of quokka in the northern jarrah forest were the only ones to show evidence of recent or long-term population bottlenecking. Of particular interest was the recently identified population at the Muddy Lakes area (the only remaining locality on the Swan Coastal Plain), which was identified as being genetically associated with the southern forest population. Overall, spatial and population cluster analysis showed small insular populations in the northern jarrah forest area, but in the southern forests there appears to be a large panmictic population.
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Sinclair, Elizabeth A., and Bridget M. Hyder. "Surviving quokka (Setonix brachyurus) population on the Swan Coastal Plain, Western Australia." Australian Mammalogy 31, no. 1 (2009): 67. http://dx.doi.org/10.1071/am09002.

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A survey of the Muddy Lakes area on the Swan Coastal Plain was carried out to determine the presence of quokkas. Extensive on-ground searches found a carcass, juvenile skull, and fresh scats, which were identified as belonging to quokka, using DNA analyses. This is currently the only known population remaining on the coastal plain.
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Phillips, Veronica F., Brian K. Chambers, and Roberta Bencini. "Habitats modified for tourism affect the movement patterns of an endemic marsupial, the Rottnest Island quokka (Setonix brachyurus)." Australian Mammalogy 42, no. 1 (2020): 48. http://dx.doi.org/10.1071/am17063.

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The quokka (Setonix brachyurus), an iconic marsupial endemic to Western Australia, is listed as vulnerable. It is found at its greatest abundance on Rottnest Island, where little is known about its home range and movement patterns. We estimated the home ranges of 22 male and 23 female quokkas within each season in four habitat types on Rottnest Island: coastal dune, grass/heath, woodland and settlement areas developed for tourism. We also tested for factors affecting home range and space use. The mean seasonal home-range size of quokkas was 1.91 ± 0.23 ha, and there was no effect of sex or weight, habitat type or wet or dry periods on the size of the home ranges. Home-range overlap during both night and day was significantly lower in the settlement (25.9%), compared with costal dunes (78.5%), woodlands (70.3%) and grass/heath (66.6%). This was due to feeding and resting sites being spatially separated, with quokkas resting outside of the settled areas during the day and travelling back to these areas to feed at night. This research demonstrates how tourism development can impact on the behaviour and movement patterns of local species and will inform future management of the quokka on Rottnest Island.
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Dundas, Shannon J. "Tell-tale testicles: observations of morphological abnormalities in small, spatially restricted mainland quokka (Setonix brachyurus) populations." Australian Mammalogy 41, no. 1 (2019): 150. http://dx.doi.org/10.1071/am17045.

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The quokka (Setonix brachyurus) exists in spatially restricted populations in the northern jarrah forest in south-west Western Australia. Observations were made of adult male quokkas exhibiting morphological anomalies (cryptorchidism and micropthalmia) that may be indicative of inbreeding within these populations. Despite the presence of males with abnormalities that could potentially affect their fertility, most females captured were carrying a pouch young or feeding a joey at foot. Field researchers and managers should routinely report abnormalities seen in wild captured animals. Reduced genetic diversity of quokka populations in the northern jarrah forest may not be the key threatening process and preservation of habitat may be more important to ensure persistence of populations. Future management of this species in the northern jarrah forest should include up-to-date occurrence mapping across their range using targeted camera trap surveys and management of habitat to improve connectivity between populations.
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Dundas, Shannon J., Peter J. Adams, and Patricia A. Fleming. "Population monitoring of an endemic macropod, the quokka (Setonix brachyurus), in the northern jarrah forest, Western Australia." Australian Mammalogy 40, no. 1 (2018): 26. http://dx.doi.org/10.1071/am16033.

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Monitoring populations of threatened species plays a part in continued conservation and contributes to assessment of how effective management actions are. We estimated population indices and studied cohort demographics of mainland populations of quokkas (Setonix brachyurus) at 14 sites across the northern jarrah forest. One site is currently monitored through annual trapping, seven were intensively surveyed a decade previously, while six sites had no previous monitoring. Across the 14 study sites, no quokkas were detected at one site and the other population estimates ranged from 5 to 25 adults. Most females (86% of capture events) carried a pouch young or were lactating (indicating a young at foot). Quokka populations at the eight previously-surveyed sites showed variable population changes. We discuss likely contributing factors, including broad-scale fox baiting and fire. Comparative studies of native species over time are important; however, such comparison has limited capacity to explain population changes without comparable methods or where relevant contributing factors (e.g. predator numbers, habitat change) have not likewise been monitored. The threat of changing climate in the northern jarrah forest (where increasing temperatures and greater frequency of drought have been witnessed over the last decades) and implications for control of fire regimes increases the urgency for an updated review of quokka populations to guide appropriate management actions.
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Hayward, M. W. "Diet of the quokka (Setonix brachyurus) (Macropodidae:Marsupialia) in the northern jarrah forest of Western Australia." Wildlife Research 32, no. 1 (2005): 15. http://dx.doi.org/10.1071/wr03051.

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The diet of the quokka in the northern jarrah forest of Western Australia was investigated by microscopic examination of faecal pellets of known individuals and comparison with a reference collection of plant epidermal tissue. Twenty-nine plant species were identified from the 97 faecal pellet groups collected from 53 individuals, confirming that the quokka is a browsing herbivore that favours leaves and stems. Of those 29 species, 11 made up over 90% of the diet and five species accounted for 71%. Thomasia species were the most common in the diet and the most preferred; Dampiera hederacea was also preferred and these species, along with Bossiaea aquifolia, Mirbelia dilatata and Agonis linearifolia, were the five most important food items. The seasonal variation in the diet of the quokka, and that between sites, can be attributed to increases in nutrient content associated with fresh growth associated with season or vegetation seral stage after fire. The reduced dietary diversity at sites with younger seral stages (<10 years after fire) and the importance of certain species that are more common in these younger ages explains the cause of the species’ habitat preference for sites with a mosaic of young and old (>25 years after fire) age classes. The relatively short availability of sufficient, high-quality, succulent plants in the seral succession of swamps occupied by quokkas is likely to drive a regular pattern of local extinction and recolonisation.
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Casinos, A., N. Milne, F. K. Jouffroy, and M. F. Médina. "Muscle fibre types in the reduced forelimb and enlarged hindlimb of the quokka (Setonix brachyurus, Macropodidae)." Australian Journal of Zoology 64, no. 4 (2016): 277. http://dx.doi.org/10.1071/zo15055.

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The quokka (Setonyx brachyurus) is restricted to two offshore islands and small isolates on the mainland of south-western Australia. It displays a tendency to saltatorial locomotion and moves at speed by bipedal hopping, although it also uses its forelimbs at low speed. Its bipedal adaptation involves enlarged hind limbs, with elongated feet. The fibre type distribution of the elbow and knee extensors, and the ankle plantar flexors, in comparison with two eutherians, the quadrupedal rhesus monkey, as a locomotor generalist, and the jerboa, a small eutherian hopping species morphologically similar to the quokka, were studied. The quokka’s forelimb showed the same characteristics as that of the jerboa, lacking the fatigue-resistant Type I fibres that are used to sustain posture. As in the jerboa, the gastrocnemius lateralis was the muscle head with the highest proportion of fast twitch fibres. Muscular fibre pattern is not identical in the quokka and the jerboa hindlimb, but it appears that both species have similar anatomical adaptations to saltatorial locomotion. Differences in muscle fibre proportions could be due to several factors including, resting posture, body size and the propensity for elastic energy storage, the burrowing behaviour of the jerboa, but also to phylogenetic constraints where the adaptation to hop on the hindlimbs is a shared behaviour of the Macropodoidea (jerboas are the only Dipodidae to have elongated hindlimbs).
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Austen, J. M., J. A. Friend, R. Yang, and U. M. Ryan. "Further characterisation of two Eimeria species (Eimeria quokka and Eimeria setonicis) in quokkas (Setonix brachyurus)." Experimental Parasitology 138 (March 2014): 48–54. http://dx.doi.org/10.1016/j.exppara.2014.01.007.

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Dissertations / Theses on the topic "Quokka"

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Miller, Susan Jane. "The composition of the milk of the quokka (Setonix brachyurus) and its consumption by the joey." University of Western Australia. School of Animal Biology, 2005. http://theses.library.uwa.edu.au/adt-WU2006.0010.

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[Truncated abstract] Previous studies suggest that the milk of the quokka (Setonix brachyurus) could change composition coincident with critical stages of development of the young, and that the milk energy provided by the mother and its utilisation by the joey would determine the young’s growth rate. To test this general hypothesis, quokkas (n = 19) were bred in captivity and milk was collected during lactation. The samples were analysed using specific biochemical assays and sensitive analytical techniques to determine the composition of the milk of the quokka. The stable isotope, deuterium oxide, was employed to estimate the volume of milk consumed by the joeys. The adult females and their young were weighed and body measurements taken periodically, in order to calculate the body condition of the adults and monitor the growth rate of the offspring. Marsupial lactation can be divided in three phases. Phase 1 of lactation covers the period during pregnancy. Phase 2a of lactation in the quokka (0 to 70 days post partum), is the period when the young is permanently attached to the teat, while Phase 2b (70 to 180 days post partum) is when the joey suckles intermittently but is still confined to the pouch. Phase 3 of lactation extends from the time when the young initially emerges from the pouch to the end of lactation (180 to 300 days post partum) ... The metabolism of fatty acids in quokkas appears to be a combination of the processes in monogastric and ruminant mammals. The growth rate of the young quokkas was dependent on the volume and energy content of the milk consumed. The crude growth efficiency indicates that quokkas are equally efficient as other marsupials reported in the literature, in converting milk energy to body mass. It seems that female quokkas maintained energy balance during lactation, most probably by increasing their food intake rather than mobilising body fat stores. In addition, it appears that quokkas are capable of producing young of similar mass, irrespective of their own body weight or condition, when they have access to an adequate supply of food and water. This was the first study to provide detailed information about milk composition and lactational energetics in the quokka. While the results supported the unifying hypothesis in relation to the major changes associated with the transition through the phases of lactation, wide variations were detected between the quokka and other marsupial species in the changes in the detailed composition of milk and milk production.
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Martínez-Pérez, Pedro. "Health and disease status in a threatened marsupial, the quokka (Setonix brachyurus)." Thesis, Martínez-Pérez, Pedro (2016) Health and disease status in a threatened marsupial, the quokka (Setonix brachyurus). PhD thesis, Murdoch University, 2016. https://researchrepository.murdoch.edu.au/id/eprint/34140/.

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Between 1901 and 1931, there were at least six anecdotal records of disease outbreaks in mainland quokkas (Setonix brachyurus) that were associated with mass mortalities. This time period pre-dates the arrival of the red fox (Vulpes vulpes). Despite these outbreaks, little or no research has been carried out to establish health and disease baseline data of the fragmented and scattered, extant populations. Epidemiological data was determined for a range of potential pathogens, and established physiological reference intervals of apparently healthy, wild quokkas on Rottnest Island and mainland locations. There were significant differences between Rottnest Island and mainland quokkas. Rottnest Island animals had haemograms with mark evidence of oxidative injury and bone marrow response consistent with a regenerative normocytic hypochromic anaemia. Except alkaline phosphatase (ALP), all blood chemistry analytes where higher in mainland animals, with particular emphasis on creatine kinase (CK), alanine amino transferase (ALT), aspartate amino transferase (AST) and vitamin E. Some other key findings include a widespread presence of a novel herpesvirus (MaHV-6), the recovery of Cryptococcus neoformans var. grubii from quokkas in highly altered ecosystems on Rottnest Island, and new Salmonella spp. serovars in Rottnest Island quokkas. Atypical lymphocytes resembling those in proliferative disorders of the lymphoid and haematopoietic tissues in other species were observed in blood smears of animals on Rottnest Island but not on the mainland. The presence of potentially-pathogenic organisms is likely to increase synergistic effects of ongoing and future threats (e.g. habitat clearing, climate change), and could increase quokka extinction risk. Disease surveillance would make a valuable contribution to Recovery Plans for the quokka, enabling preparedness for a rapid response if clinical disease is to happen, and to manage populations in a more integrated way.
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Hayward, Matt School of Biological Earth &amp Environmental Science UNSW. "The ecology of the quokka (Setonix brachyurus) (Macropodidae: Marsupialia) in the Northern Jarrah Forest of Australia." Awarded by:University of New South Wales. School of Biological, Earth and Environmental Science, 2002. http://handle.unsw.edu.au/1959.4/18768.

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The quokka (Setonix brachyurus Quoy & Gaimard 1830) is a medium-sized, macropodid marsupial that is endemic to the mesic, south-western corner of Australia. While being a tourist icon on Rottnest Island, the species is threatened with extinction. It has been intensively studied on Rottnest Island in the 1960s and 1970s, however very little is known of its ecology on the mainland. Additionally the insular and mainland environments are extremely different suggesting that ecological differences between the two populations are likely. Consequently, this study sought to determine the basic autecology of the quokka and identify what factors have attributed to its threatened conservation status. The northern jarrah forest of Western Australia was selected as the study region due to it being at the northern limit of extant quokka distribution and because it was thought that the factors threatening the quokka would be exacerbated there. Fossil deposits suggest that the quokka originally occupied an area of approximately 49,000 km2 in the south-western corner of Australia. Historical literature show that they were widespread and abundant when Europeans colonised the region in 1829 but a noticeable and dramatic decline occurred a century later. The arrival of the red fox to the region coincided almost exactly with this decline and so it was probably ultimately responsible. Continued predation by both it and the feral cat are likely to have continued the decline, along with habitat destruction and modification through altered fire regimes. Specific surveys and literature searches show that since the 1950s, the area occupied by the quokka has declined by 45% and since 1990 by 29%. Based on the criteria of the IUCN (Hilton-Taylor 2000), the conservation status of the quokka should remain as vulnerable. An endangered status may be more applicable if the quokkas restriction to patches through its existence as a metapopulation is considered. Trapping of eight sites supporting quokka populations in the mid-1990s revealed three sites now locally extinct despite the ongoing, six year old, fox control programme. Another three are at serious risk of extinction. Extant population sizes ranged from one to 36 and population density ranged from 0.07 to 4.3 individuals per hectare. This is considered to be below the carrying capacity of each site. The overall quokka population size in the northern jarrah forest may be as low as 150 adult individuals, of which half are likely to be female. Even the largest extant populations are highly susceptible to stochastic extinction events. This small size was surprising considering the six year old, introduced predator control programme. Historically, the restriction to discrete habitat patches, the occasional inter-patch movement, the lack of correlation between the dynamics of each population and reports of frequent localised extinctions and colonisations suggest that the quokka population once existed as part of a classic metapopulation. The massive decline of the quokka in the 1930s pushed the metapopulation structure into a non-equilibrium state such that today, the extant populations are the terminal remnants of the original classic metapopulation. Wild mainland quokkas breed throughout the year. A significant reduction in the number of births occurs over summer and this coincides with a decline in female body weight. Despite this, the mainland quokka is relatively fecund and is able to wean two offspring per year. The level of recruitment from pouch young to independence was low and this may explain the apparent lack of population increase following the initiation of fox control. A total of 56 trapped quokkas were fitted with a radio collar. Mean home range size for quokkas was 6.39 ha with a core range of 1.21 ha and this was negatively related to population density. Male home ranges were larger than females but not significantly when the sexual size dimorphism was considered. Nocturnal ranges were larger than diurnal ranges reflecting nocturnal departures from the swamp refugia. Home range sizes varied seasonally, probably due to changes in the distance required to move to obtain sufficient nutrients and water over the dry summer compared to the wet winter and spring. Telemetry confirmed trapping results that showed no movement between swamps or populations. Home range centres shifted to the periphery of the swamp following the winter inundation and this may increase the species susceptibility to predation. The lack of dispersal is probably caused by quokka populations existing below carrying capacity and following selection for philopatry under the threat of predation for dispersing individuals. Without dispersal to recolonise or rescue unpopulated patches, the collapse of the original quokka metapopulation appears to have occurred. On a macrohabitat scale, the quokka in the northern jarrah forest is restricted to Agonis swamp shrubland habitats that form in the open, upper reaches of creek systems on the western side of the forest. This restriction was probably initially due to the high water requirements of the quokka but is likely to have been exacerbated by increased predation pressure since the arrival of the fox. On a microhabitat scale, the quokka is a habitat specialist, preferring early seral stage swamp habitats, probably for foraging, as part of a mosaic of old age swamp that provides refuge. Despite the six year old, introduced predator control programme, foxes and cats are still the major cause of mortality to quokkas. Road kills was the other identifiable cause. Individuals alive at the start of the study had an 81% chance of staying alive until the end. The likelihood of dying was minimised by grouping together with conspecifics, maximising home range size and maximising the time spent within the swampy refuge. Current rates of adult and juvenile survivorship should allow population recovery and so it seems pouch young mortality, reflected by low recruitment, has inhibited the anticipated population increase following predator control. The confounding effect of inadequate unbaited controls meant that little statistical evidence was available on the impact of introduced predators on the quokka, however the models provided support for earlier hypotheses of these. The presence of a quokka population at a site was related to the amount of poison baits delivered ??? reflecting predation pressure, the average age of the swamp and a mosaic of early and late seral stages within the swamp habitat. Recently burnt habitat is thought to provide food for quokkas and long unburnt habitat provides refuge from predation.
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Austen, Jill. "Characterisation of native Trypanosomes and other protozoans in the Australian marsupials the Quokka (Setonix brachyurus) and the Gilbert's Potoroo (Potorus gilbertii)." Thesis, Austen, Jill ORCID: 0000-0002-1826-1634 (2015) Characterisation of native Trypanosomes and other protozoans in the Australian marsupials the Quokka (Setonix brachyurus) and the Gilbert's Potoroo (Potorus gilbertii). PhD thesis, Murdoch University, 2015. https://researchrepository.murdoch.edu.au/id/eprint/31139/.

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Trypanosomes are blood-borne parasites that can cause severe disease in both humans and animals, resulting in very large economic losses worldwide. In contrast to the wealth of information on pathogenic species such as Trypanosoma cruzi and Trypanosoma brucei, little is known of the pathogenicity, prevalence and life-cycles of trypanosomes in native Australian mammals. The aim of this thesis was to characterise trypanosomes and other protozoans from the critically endangered Gilbert’s potoroo (Potorous gilbertii) and the quokka (Setonix brachyurus) from Western Australia using morphological and molecular analysis. A novel Trypanosoma species, Trypanosoma copemani was identified in Gilbert’s potoroos and quokkas using molecular and morphological analysis. Further molecular characterisation of T. copemani in quokkas at both the 18S rRNA and glyceraldehyde-3-phosphate dehydrogenase (GAPDH) loci identified multiple T. copemani genotypes revealing that the parasite is genetically variable. Given the phylogenetic grouping of T. copemani as a stercorarian (requiring faecal transmission by vector), the fact that ticks are common ectoparasites of Gilbert’s potoroos and quokkas and the previous identification of trypanosomes in ticks, ticks were examined as potential vectors of T. copemani. Motile trypanosomes were detected in both the haemolymph and midgut sections of Ixodes australiensis ticks removed from quokkas and Gilbert’s potoroos and stained trypanosomes were detected within a faecal smear. Morphologically, the tick trypanosomes resembled in vitro forms of T. copemani, representing epimastigotes and slender trypomastigote stages, with dividing stages detected within the midgut region. Molecular analysis of the tick isolates, showed 100% sequence identity to T. copemani at the 18S rRNA locus, suggesting that the tick is a putative vector for T. copemani. Investigation of the life-cycle stages of native Australian trypanosomes using microscopy and in vitro culture of blood from quokkas and Gilbert’s potoroos revealed that native Australian trypanosomes are highly polymorphic, with three different trypomastigote blood stream forms detected within blood films, resembling slender, medium and broad stages. In addition, promastigote, sphaeromastigote and amastigote stages were observed directly within blood films and this is the first report of these stages in the circulatory system of Australian marsupials. Three novel trypanosome life-cycle forms representing an oval form, an extremely thin form and an adherent form were also identified both in vitro and in vivo, while a novel tiny form and a novel circular form were only detected in culture. Trypanosoma vegrandis was also detected for the first time in one quokka isolate (Q1340) and confirmed using species-specific primers. As tourists and quokkas on Rottnest Island have a close relationship, the zoonotic potential of T. copemani was investigated by determining the relative susceptibility of T. copemani to human serum using the blood incubation infectivity test. Trypanosoma copemani was observed by microscopy in all human blood cultures from day 5 to day 14 post inoculation. The mechanism for normal human serum resistance in T. copemani is not known. The results of this thesis show that at least one native Australian trypanosome species may have the potential to infect humans. In addition to blood, quokka faecal samples were also collected to investigate the prevalence of Eimeria by PCR screening of faecal samples from three quokka populations, Two Peoples Bay, Bald Island and Rottnest Island, respectively. The PCR prevalence of Eimeria was 62.5%, 85.0% and 78.3% for these three locations respectively. Two Eimeria species were identified based on morphometric analysis from sporulated oocysts, Eimeria quokka and Eimeria setonicis, with the majority of quokkas co-infected with both species. Singular infections, however, were identified in a few individuals allowing molecular analysis to be performed using both the 18S rRNA and cytochrome c oxidase subunit 1 genes. Phylogenetic analysis grouped E. quokka and E. setonicis within the Eimeria marsupial clade. This study is the first one to characterise E. quokka and E. setonicis by molecular analyses, enabling more extensive resolution of evolutionary relationships among marsupial-derived Eimeria species. Overall this study has characterised the novel T. copemani in both the quokka and the Gilbert’s potoroo and has shown T. copemani to be both morphologically and genetically variable. This is a stercorarian trypanosome, transmitted through vector faecal contamination and may potentially be infectious to humans. The findings of this thesis highlight the complexity of Australian trypanosomes and provide insights into the prevalence, potential pathogenicity and human infectivity of this novel parasite. Further research is required to assess the role of trypanosome infection on marsupial population dynamics and the implications for management and conservation.
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Sertis, Steve. "Identification as a motivator of environmentally responsible tourist behaviour." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 1996. https://ro.ecu.edu.au/theses/972.

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This study examined the use of information in motivating environmentally responsible behaviour. In light of the ineffectiveness of traditional educational methods that have focussed upon affecting behaviour by changing attitudes through the manipulation of cognitive variables, an attempt was made to produce a sense of identification with the Rottnest Island Quokka using the tripartite model of motivational bases of attitudes developed by Hills (1993 ). This model used to determine whether different kinds of information would produce changes in environmental behaviour. Three groups of tourists were given either no information; factual information, consistent with current educational techniques used to influence behaviour; or identification information designed to produce feelings of identification with the quokka directed at protecting the quokka and its environment. Results indicated that wording the same information differently affected the self-reported motivational bases of behaviour toward the quokkas and their environment. Identification motivations were reportedly higher with tourists given the identification information brochure compared to those given factual or no information. The literature suggests that with heightened identification motivations, instrumental motivations are likely to be reduced. Results offered no support for this argument. Furthermore, behavioural observations indicated that the manipulation did not lead to differences in the behaviour of tourists across the three information groups. Behavioural observations of the interactions between tourists and quokkas highlighted the role of instrumental motivations among tourists. Whilst instrumental motivations should therefore be recognised and incorporated into any educational or environmental strategy aimed at protecting the environment, it is suggested that further research is needed to better understand how alternative motivations, such as one with an identification base, can better promote a valuing of the environment and its fauna for its own sake
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Sterelyukhin, Alex. "Quantitative analysis of quota trading behaviour at the end of the quota year." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/2644.

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The Canadian supply management system offers some lessons for the design of a domestic permit trading system. One of the objectives of the domestic trading system is minimizing costs and maximizing the system's efficiency for participants and system administrators. This paper suggests that a permit trading system designed with a longer permit period and without a grace period can be more efficient than a system designed with a shorter permit period and a grace period for compliance. This study is based on Canadian Supply Management System experience and examines the Canadian dairy industry, where two different schemes (monthly and annual) have been used. Under the annual scheme, a strong compliance mechanism stimulates participants to exchange quotas during the dairy year (permit period) and does not require burdensome, non-compliance procedures after the permit period ends. The monthly scheme is characterized by a short permit period and a grace period for compliance. This study examines how these two schemes affect participants' behavior on the quota exchange. The empirical results show evidence of the influence of different schemes on farmers' behaviours regarding the quota exchange. As a conclusion, the paper recommends the use of a permit trading mechanism with a longer permit period and without a grace period for the design of a carbon trading system. The results support Barichello (2002), who developed the Canadian domestic permit trading scheme on the basis of receiving an offset from agricultural soil carbon sinks.
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Goss, Stephen Richard. "Optimising milk production under quota." Thesis, Imperial College London, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.388910.

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Sadza, Peter Bernard. "Environmental Hypocrisy--or Environmental Quota?" W&M ScholarWorks, 2010. https://scholarworks.wm.edu/etd/1539626641.

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Lee, Jungsam. "Flexible quota management using virtual population units /." View online ; access limited to URI, 2004. http://wwwlib.umi.com.helin.uri.edu/dissertations/dlnow/3160033.

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Urbinati, Simone. "Studio di un generatore eolico d'alta quota." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/9917/.

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Books on the topic "Quokka"

1

What on earth is a quokka? Woodbridge, Conn: Blackbirch Press, 1997.

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McNab, Claire. The quokka question: A Kylie Kendall mystery. Los Angeles: Alyson Books, 2005.

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Alley, R. W. (Robert W.), ill, ed. Quentin Quokka's quick questions. New York: Kane Press, 2011.

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Hansen, Grace. Quokka (Quokka ). ABDO Publishing Company, 2019.

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Hansen, Grace. Quokka (Quokka ). ABDO Publishing Company, 2019.

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Hansen, Grace. Quokka. ABDO Publishing Company, 2019.

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Hansen, Grace. Quokka. ABDO Publishing Company, 2019.

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McNab, Claire. Quokka Question. Bella Books, Incorporated, 2020.

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Wilkinson, Lili, and Alison Mutton. Clancy the Quokka. Allen & Unwin, 2019.

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Bamios, Jodie. Quokka Lovers Are Born in August: Quokka Gifts for Quokka Lovers Animal Gifts, Great Wildlife Aussie Animal Zoo Keeper Gift Australian Quokka. Independently Published, 2021.

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Book chapters on the topic "Quokka"

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Winder, Gordon M. "Introduction: Fisheries, Quota Management, Quota Transfer and Bio-economic Rationalization." In Fisheries, Quota Management and Quota Transfer, 3–28. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59169-8_1.

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Langdon, Steve J. "Approaching Leviathan: Efforts to Establish Small-Scale, Community Based Commercial Salmon Fisheries in Southeast Alaskan Indigenous Communities." In Fisheries, Quota Management and Quota Transfer, 197–215. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59169-8_10.

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Winder, Gordon M. "Conclusion: Surveying the Wake." In Fisheries, Quota Management and Quota Transfer, 219–32. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59169-8_11.

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Hubbard, Jennifer. "Fisheries Biology and the Dismal Science: Economists and the Rational Exploitation of Fisheries for Social Progress." In Fisheries, Quota Management and Quota Transfer, 31–61. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59169-8_2.

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Heidbrink, Ingo. "There’s Always another Fish Available – Why Bother about Quotas at All?" In Fisheries, Quota Management and Quota Transfer, 63–73. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59169-8_3.

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Winder, Gordon M. "Context and Challenges: The Limited ‘Success’ of the Aotearoa/New Zealand Fisheries Experiment, 1986–2016." In Fisheries, Quota Management and Quota Transfer, 77–98. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59169-8_4.

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Mariat-Roy, Emilie. "In the Wake of ITQs in Iceland, 1991–2011: A Dynamic Approach to Marine Resource Management Policies." In Fisheries, Quota Management and Quota Transfer, 99–117. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59169-8_5.

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Johnsen, Jahn Petter, and Svein Jentoft. "Transferable Quotas in Norwegian Fisheries." In Fisheries, Quota Management and Quota Transfer, 121–39. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59169-8_6.

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Bonow, Madeleine. "Swedish Fishing in the Wake of ITQ." In Fisheries, Quota Management and Quota Transfer, 141–58. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59169-8_7.

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Jantzen, Katharina, Ralf Döring, Leyre Goti, and Lorena Fricke. "Individual Vessel Quotas in Germany and Denmark: A Fair Distribution Process?" In Fisheries, Quota Management and Quota Transfer, 159–80. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59169-8_8.

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Conference papers on the topic "Quokka"

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Hine, Cameron, Jean-Guy Schneider, Jun Han, and Steve Versteeg. "Quokka: visualising interactions of enterprise software environment emulators." In the 27th IEEE/ACM International Conference. New York, New York, USA: ACM Press, 2012. http://dx.doi.org/10.1145/2351676.2351750.

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Brennan, AnnMarie, Suleiman Alhadidi, and Geoff Kimm. "Quokka: Programming for Real Time Digital Design Platform." In CAADRIA 2013: Open Systems. CAADRIA, 2013. http://dx.doi.org/10.52842/conf.caadria.2013.261.

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An, Xinrui, Peinan Teng, Hamid Mehrvarz, Alexander To, Hongzhao Li, Craig Johnson, Bram Hoex, and Allen Barnett. "Empirical and Quokka simulated evidence for enhanced VOC due to limited junction area for high efficiency silicon solar cells." In 2016 IEEE 43rd Photovoltaic Specialists Conference (PVSC). IEEE, 2016. http://dx.doi.org/10.1109/pvsc.2016.7750069.

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Pasumarthi, Adityanand. "Quota queue." In Companion to the 23rd ACM SIGPLAN conference. New York, New York, USA: ACM Press, 2008. http://dx.doi.org/10.1145/1449814.1449836.

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Pio, Pedro B., Igor C. Sodré, and Vinicius R. P. Borges. "Visual analysis to compare academic performances of quota and non-quota students from computer-related programs." In Workshop sobre Educação em Computação. Sociedade Brasileira de Computação - SBC, 2020. http://dx.doi.org/10.5753/wei.2020.11154.

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The implementation of affirmative actions in public universities is a topic of debate within the Brazilian society, specially regarding the academic performance of students that have been admitted through the quota system. This paper describes a visual analysis process to explore and compare the academic performances of quota and non-quota students from computer-related programs in a public Brazilian university. The results revealed that both failure and dropout rates for quota students are slightly higher than non-quota students in the first terms, but tends to present similar rates at the final terms.
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Barghoorn, Martin. "Intelligent quota management system." In the 2002 conference. New York, New York, USA: ACM Press, 2002. http://dx.doi.org/10.1145/602231.602235.

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SMUTKA, Ľuboš, Helena ŘEZBOVÁ, and Patrik ROVNÝ. "EUROPEAN UNION´S SUGAR MARKET CONCENTRATION UNDER THE SUGAR QUOTA PRODUCTION SYSTEM." In Rural Development 2015. Aleksandras Stulginskis University, 2015. http://dx.doi.org/10.15544/rd.2015.110.

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The European sugar beet quota system is in very high dynamic process in recent years. The number of sugar companies involved in this system has been constantly decreasing. The aim of this paper is to define subjects (companies/alliances), which possess the current production capacities working under the production quotas system. The paper is determining especially the level of beet sugar production quota holder system concentration using the Herfindahl-Hirschman Index. The paper provides the following findings. The European quota holder system is extremely concentrated and it is becoming more and more dominated by fewer players. Sugar quota is distributed among 19 EU-Member States. In this regard, the quota is generous, especially in relation to France, Germany, Poland and United Kingdom. In Finland, Lithuania, Hungary, Sweden, Denmark, the Netherlands, Slovakia and the United Kingdom controlled by two or even one subject (companies, alliances). There is a large discrepancy between political efforts to distribute equitable R 1308/2013-sugar quotas among states and the actual reality of those distributions. While the EU-quota holder system does not indicate an extreme concentration, an analysis according to the headquarters´ location and allocated quotas to owners of production capacities provides the evidence of extreme concentration.
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Arnardottir, Audur Arna, Throstur Olaf Sigurjonsson, and Patricia Gabaldon. "Regulation on gender quotas: Gauging the impact on corporate board." In Corporate governance: An interdisciplinary outlook. Virtus Interpress, 2023. http://dx.doi.org/10.22495/cgaiop4.

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This research explores how increased gender diversity on corporate boards in Iceland, driven by applying a “hard” public policy, i.e., board gender quota legislation, has affected post-quota board directors’ perceptions of board functioning
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Kapitza, Rüdiger, Meik Felser, Hans P. Reiser, and Franz J. Hauck. "Decentralised diffusion-based quota management." In the 4th international workshop. New York, New York, USA: ACM Press, 2006. http://dx.doi.org/10.1145/1186675.1186680.

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Chhabra, Anamika, and S. R. S. Iyengar. "Should Wikipedia and Quora collaborate?" In 2016 8th International Conference on Communication Systems and Networks (COMSNETS). IEEE, 2016. http://dx.doi.org/10.1109/comsnets.2016.7439980.

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Reports on the topic "Quokka"

1

Myers, J. IMAP4 QUOTA extension. RFC Editor, January 1997. http://dx.doi.org/10.17487/rfc2087.

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Melnikov, A. IMAP QUOTA Extension. RFC Editor, March 2022. http://dx.doi.org/10.17487/rfc9208.

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Seybold, Patricia. Why Quora Is Useful (and Addictive). Boston, MA: Patricia Seybold Group, February 2010. http://dx.doi.org/10.1571/psgp02-03-11cc.

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Romero, Mauricio, and Abhijeet Singh. The Incidence of Affirmative Action: Evidence from Quotas in Private Schools in India. Research on Improving Systems of Education (RISE), February 2022. http://dx.doi.org/10.35489/bsg-rise-wp_2022/088.

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This paper studies the effects of India’s main school-integration policy—a 25 percent quota in private schools for disadvantaged students, whose fees are reimbursed by the state—on direct beneficiaries. Combining survey and administrative data from the state of Chhattisgarh, with lottery-based allocation of seats in oversubscribed schools, we show that receiving a quota seat makes students more likely to attend a private school (by 24 percentage points). However, within eligible caste groups, quota applicants are drawn disproportionately from more-educated and economically better-off households and over three-quarters of the applicants who were not allotted a quota seat also attended a private school as fee-paying students. Consequently, we estimate that ~ 70 percent of the total expenditure on each quota seat is inframarginal to school choice. The policy delivers clear gains for direct beneficiaries but is unlikely to affect school integration without broadening the pool of applicants.
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Galkin, Philipp, Tarek Atalla, and Zhongyuan Ren. An Estimation of the Drivers Behind OPEC’s Quota Decisions. King Abdullah Petroleum Studies and Research Center, July 2018. http://dx.doi.org/10.30573/ks--2018-dp38.

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Kroetz, Kailin, James N. Sanchirico, Elsa Galarza Contreras, David Corderi Novoa, Nestor Collado, and Elaine W. Swiedler. Examination of the Peruvian Anchovy Individual Vessel Quota (IVQ) System. Inter-American Development Bank, December 2016. http://dx.doi.org/10.18235/0000598.

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Trela, Irene, and John Whalley. Internal Quota Allocation Schemes and the Costs of the MFA. Cambridge, MA: National Bureau of Economic Research, February 1991. http://dx.doi.org/10.3386/w3627.

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Korver, B., and L. Dusseault. Quota and Size Properties for Distributed Authoring and Versioning (DAV) Collections. RFC Editor, February 2006. http://dx.doi.org/10.17487/rfc4331.

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Spencer, Barbara. Quota Licenses for Imported Capital Equipment: Could Bureaucrats Ever DoBetter than the Market? Cambridge, MA: National Bureau of Economic Research, August 1996. http://dx.doi.org/10.3386/w5695.

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Iskra, Thomas W. Do We Need a Quota on the Accession of Females into the Air Force? Fort Belvoir, VA: Defense Technical Information Center, March 1986. http://dx.doi.org/10.21236/ada177749.

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