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Book The Conservation and Ecology of a Rare and Declining Agamid Lizard the Grassland Earless Dragon Tympanocryptis Pinguicolla in the Monaro Region of New South Wales

Download or read book The Conservation and Ecology of a Rare and Declining Agamid Lizard the Grassland Earless Dragon Tympanocryptis Pinguicolla in the Monaro Region of New South Wales written by Tim McGrath and published by . This book was released on 2015 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "This research has provided the first ever comprehensive review and investigation into the ecology and conservation of T.pinguicolla in the Monaro region of NSW providing a baseline for future research and conservation action. It provides an improved understanding of this species' ecology and conservation needs and addressed several priority recovery actions identified in the National Recovery Plan for the species. A key message from this research is that managed grazing regimes in natural temperate grasslands are likely to be compatible with the conservation of T. pinguicolla in the Monaro region. Such managed grazing practices that exclude overgrazing are best placed to mimic pre European settlement modification processes. By contrast the overwintering and microhabitat preferences of this lizard indicate pasture improvement through ploughing, application of fertiliser and removal of rocks are not compatible with the conservation of this species."

Book National Recovery Plan for the Grassland Earless Dragon

Download or read book National Recovery Plan for the Grassland Earless Dragon written by ACT Government - Department of Territory and Municipal Services and published by . This book was released on 2009 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Population Decline in the Endangered Grassland Earless Dragon in Australia

Download or read book Population Decline in the Endangered Grassland Earless Dragon in Australia written by Wendy Jane Dimond and published by . This book was released on 2010 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Identifying species under threat from extinction and what is driving their decline is vital to biodiversity conservation. Currently, lizard populations worldwide are under serious threat with widespread declines and predictions of multiple extinctions through climate change. No reptile extinction has been recorded in Australia since European settlement. Yet, emerging signs indicate that Australian reptiles are facing major threats from habitat fragmentation and other extinction forces. Contractions in the distribution of Australian reptiles are well documented with 25 percent of the country’s reptile fauna nominated by conservation agencies and individuals as warranting threatened status and requiring management. One of the most highly endangered lizards in the Australian Capital Territory (ACT), Tympanocryptis pinguicolla (grassland earless dragon), is facing range contraction from habitat loss and fragmentation, caused by agricultural and urban development. Tympanocryptis pinguicolla are of particular concern because they are native temperate grassland specialists, a habitat type of which only 0.5% of the pre-1770 area in southeastern Australia remains in a semi-natural condition. It is currently unclear if the remaining populations of T. pinguicolla are stable or if contraction is continuing... Overall, these data suggest that this is a species for which the effects of habitat fragmentation and destruction and drought are a real threat. They are clearly still declining within the Canberra region, and if nothing changes, the effects of low fecundity and juvenile survival will drive the populations to extinction within ten years. With low population densities a large effort survey is required but this will be necessary if we want to inform the life history parameters around fecundity for which we currently have little data and we need most to focus on if we are to better model these populations.

Book Grassland Earless Dragon Tympanocryptis Pinguicolla

Download or read book Grassland Earless Dragon Tympanocryptis Pinguicolla written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Detecting and Monitoring the Canberra Grassland Earless Dragon Tympanocryptis Lineata

Download or read book Detecting and Monitoring the Canberra Grassland Earless Dragon Tympanocryptis Lineata written by Jessica Thomson and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reptile populations are declining at a rapidly increasing rate globally. Many of these declines are caused by habitat loss and fragmentation. In Australia, small and cryptic reptiles are frequently data deficient as they are often difficult to detect and monitor. This may lead to unknown extinctions or undetected species declines. A robust monitoring plan is fundamental to the detection of rare and cryptic reptiles and necessary to enable managers to detect changes in population demographics and identify declines. Some reptile management plans include provisions for occupancy and capture-mark-release-recapture surveys that enable evaluations of the impacts of threats and estimate population trends, but these plans vary in efficacy and implementation. The ectothermic nature of reptiles influences their behaviour profoundly and thus is likely to influence the activity of reptiles and therefore affect their detectability. Most reptiles seek refuge when temperatures are close to their maximum or minimum thermal thresholds and knowing these behaviours can help inform the design of monitoring approaches. In the natural temperate grasslands of the ACT, plastic PVC piping has been successfully used as artificial refuges to capture and monitor the cryptic Canberra grassland earless dragon (Tympanocryptis lineata); an endangered agamid lizard confined to natural temperate grasslands in south-eastern Australia. This reptile has been monitored annually since its rediscovery in the early 1990's. The monitoring is implemented by the ACT Government and uses artificial arthropod burrows established in various locations in the ACT to enable a capture-mark-release-recapture approach. The detection probability of the dragon using this monitoring approach remains critically low (0.01), making changes in abundance difficult to detect. In this thesis, I report on the use of field experiments and statistical modelling to test two propositions that, if successful, could increase the detection probability for this species. The propositions are: 1) that changing the current time of survey to an earlier time of day when the dragons are less likely to be active and more likely to be in the artificial burrows, will increase their rates of detection; and 2) that the shelters used on artificial burrows are preferred by the lizards and could therefore be more broadly used to increase the numbers of animals detected. I found that changing the time of survey to an earlier time of day when dragons are thought to be less active and more likely to be in artificial burrows did not increase the detection probability of the dragon but actually decreased it by 69%. In contrast, I also found that the number of dragons detected was positively influenced by the presence of sheltered burrows such that 64% of dragons detected were captured in sheltered burrows. By combining available data from all years in which surveys with alternating sheltered and non-sheltered burrows were conducted, I found that the proportion of dragons detected under sheltered burrows across all years, regardless of time of day, was consistently and significantly higher than dragons detected in non-sheltered burrows. This means that sheltered burrows are likely to increase the detection probability of dragons. In light of my findings, I suggest that surveying earlier in the day will not increase detection probability and as such I do not recommend changing the time of survey to earlier in the day. However, I do recommend that shelters be added to all burrows in the field as it is highly likely to enhance detectability and hence enhance the quality of the information obtained from the monitoring. My results suggest that targeted field studies can be used to test suggested improvements that could enhance monitoring capacity for this species and provide a positive approach to improve the effectiveness of the current monitoring program. The findings from this study contribute new information and aimed to optimise the monitoring of the Canberra grassland earless dragon, which in turn will assist managers to assess the efficacy of management actions conducted for the conservation of this endangered species.

Book Taxonomy and Conservation of Grassland Earless Dragons

Download or read book Taxonomy and Conservation of Grassland Earless Dragons written by Jane Melville and published by . This book was released on 2019 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book 1998 Survey and Monitoring Program for the Eastern Lined Earless Dragon Tympanocryptis Lineata Pinguicolla in the Majura and Jerrabomberra Valleys A C T

Download or read book 1998 Survey and Monitoring Program for the Eastern Lined Earless Dragon Tympanocryptis Lineata Pinguicolla in the Majura and Jerrabomberra Valleys A C T written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Endangered Species Program

Download or read book Endangered Species Program written by and published by . This book was released on with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Dragon Lizards of Australia

Download or read book Dragon Lizards of Australia written by Jane Melville and published by . This book was released on 2019 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: The only title available on Australian Dragon Lizards including the most recent understanding of their origins and life history. Australia's mostly hot dry continent is home to nearly 800 described species and the seven Australian families represent four evolutionary lineages; three families of geckoes and flap-footed (legless) lizards; skinks; goannas and dragons. Australia is a land of lizards, with an amazing diversity of species that rivals any other country on earth. The authors aim to convey their admiration for these amazing animals and share the knowledge and experience gained from working with them. Provided are the most recent understanding of their origins, life history, habitat and distribution. Also included is an individual account of all of Australia's dragon species, featuring the most up to date taxonomic classification. Each is described, illustrated and mapped.

Book Contributions to the History of Herpetology

Download or read book Contributions to the History of Herpetology written by Society for the Study of Amphibians and Reptiles and published by Society for the Study of Amphibians & Reptiles. This book was released on 1989 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Perunga Grasshopper

Download or read book Perunga Grasshopper written by and published by . This book was released on 1999 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: