Download or read book Personality and Behavioural Syndromes in Sleepy Lizards Tiliqua Rugosa written by Jana Kate Bradley and published by . This book was released on 2010 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Integrating Consistent Among individual Differences in Behavior and Parasite Load in a Wild Population of Sleepy Lizards Tiliqua Rugosa written by Eric Matthew Payne and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Broadly, this work attempts to integrate host personality (i.e., consistent individual differences in behavior) and parasitism using a wild population of sleepy lizards (Tiliqua rugosa) and their tick parasites. To that end, Chapter 1 first studies personality in sleepy lizards over a six-year period. Specifically, we evaluated the factors that influenced lizard aggression and boldness scores, as well as determined whether these behaviors constituted personality (via quantifying their repeatability). We found a positive relationship between tick counts and lizard aggression and boldness. Both of these behaviors were also repeatable (i.e., differed consistently among individuals) for males and females through long periods, even across years. Next, given that we know that individuals of many species often differ in their parasite loads and consistently differ in their behavior, Chapter 2 uses nine years of tick count data to investigate whether sleepy lizards differed consistently in their parasitism. We found that lizards did indeed differ, such that some individuals persistently had more ticks while others had fewer. These consistent differences endured both within and across years. Lizard aggression and boldness, intriguingly, were not strongly associated with lizard average tick counts. Chapter 3 then examines more explicitly the connections between lizard personality and infection using an experimental infestation of lizards. We correlated pre-treatment behavior with the success of the infestation (attachment probability), and we assessed the effect of infestation on behavior post-treatment. Interestingly, lizard aggression and boldness interactively related to attachment probability: Increasing boldness was associated with reduced infestation success for less aggressive lizards, but greater infestation for more aggressive lizards. Upon infestation, lizards became bolder, but aggression did not change. These results therefore present the possibility of host behavior-parasite feedbacks that depend on multiple behaviors (i.e., the direction of the feedback depends on both aggression and boldness). Lastly, using piecewise structural equation modeling, Chapter 4 tests how lizard personality related to tick exposure and acquisition via intermediary pathways. For example, lizards predominantly acquire ticks through shared refuge use (which must occur with a time lag), so we considered how aggression and boldness affected refuge use, and then how refuge use affected tick counts. We found, surprisingly, that aggression and boldness did not affect tick counts either directly or through intermediary pathways. However, lizard behaviors still mattered. Tick acquisition, for instance, strongly increased with lizards' time-lagged refuge sharing, which itself increased with lizards' social network interactivity. Together, these chapters present a few key findings: 1) both behavior and parasitism can differ consistently among individuals (e.g., individuals may exhibit both persistently high aggression and parasite loads); 2) behavior and parasites obviously interconnect, but the feedbacks between behavior and parasitism may involve multiple distinct behaviors, the combination of which may affect the direction of the parasite-behavior feedback; and 3) though host behavior can strongly affect parasite transmission, only certain behaviors may matter, and some of these behaviors may act indirectly. Considering direct and indirect links among multiple behaviors and parasites, as well as whether such traits differ consistently among individuals in wild conditions, may greatly enhance our understanding of host-parasite ecology.
Download or read book Human Disturbance and Stride Frequency in the Sleepy Lizard Tiliqua Rugosa written by Gregory Dale Kerr and published by . This book was released on 2004 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pair Fidelity in the Australian Sleepy Lizard Tiliqua Rugosa written by Radika Joy Michniewicz and published by . This book was released on 2004 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Circadian Rhythm of Behavioral Thermoregulation in the Sleepy Lizard tiliqua Rugosa written by David J. Ellis and published by . This book was released on 2006 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seasonal Regulation of the Circadian Rhythms of Behavioural Temperature Selection and Locomotor Activity in Australian Sleepy Lizards Tiliqua Rugosa Gray Reptilia Scincidae written by David John Ellis and published by . This book was released on 2010 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research project examined the role of environmental time cues and circadian rhythms in mediating seasonal adjustments in the body temperature and locomotor activity patterns in the Australian sleepy lizard, Tiliqua rugosa (Gray 1827). The first component of this study investigated whether daily rhythms of behavioural thermoregulation and locomotor activity that T. rugosa displays in the field are endogenous circadian rhythms. In each season, there was significant variation in each of these rhythms in lizards released on laboratory thermal gradients under prevailing light-dark (LD) cycles. Both rhythms persisted when lizards were released in constant darkness (DD) and exhibited the same free-running period suggesting a single circadian pacemaker drives both rhythms. The first component of this study revealed that seasonal changes in the expression of daily behavioural thermoregulatory and locomotor activity rhythms are mediated by the circadian system in T. rugosa. The second component of this project comprised three experiments that determined the relative importance of 24 h LD and temperature cycles (TCs) in entraining the locomotor activity rhythm. In the first experiment, lizards were held under LD 12:12 and were subjected to either a TC of 33:15°C in phase with the LD cycle or a reversed TC. Following LD 12:12, lizards were maintained under the same TCs but were subjected to DD. Activity was restricted to the thermophase in LD irrespective of the lighting regime and during the period of DD that followed, suggesting entrainment by the TC. In the second experiment, lizards were held under LD 12.5:11.5 and were subjected to one of three treatments; (1) constant 30°C, (2) normal TC (30:20°C), or (3) reversed TC. Following LD, all lizards were subjected to DD and constant 30°C. Post-entrainment free-run records revealed that LD cycles and TCs both entrain locomotor activity rhythms of T. rugosa. Although there was large variation in the phasing of the rhythm in relation to the LD cycle in reversed TC lizards, TCs presented in phase with the LD cycle most accurately synchronised the rhythm to the photocycle. In the third experiment, lizards were held in DD at constant 30°C before being subjected to a further period of DD and one of four treatments; (1) normal TC (06:00 h to 18:00 h thermophase), (2) delayed TC (12:00 h to 00:00 h thermophase), (3) advanced TC (00:00 h to 12:00 h thermophase) or (4) control (no TC, constant 30°C). While control lizards continued to free-run in DD at constant temperature, locomotor rhythms of lizards subjected to TCs rapidly entrained to TCs irrespective of whether TCs were phase advanced or delayed by 6 h. The results of this experiment excluded the possibility that masking effects were responsible for locomotor responses of lizards to TCs. This study demonstrated that seasonal changes in the expression of this species' daily behavioural thermoregulatory and locomotor rhythms are mediated by a circadian system that is sensitive to both light and temperature. The sensitivity of the circadian system to temperature, in particular, may allow T. rugosa to restrict its activity to times of the year that are thermally favourable.
Download or read book Exclusive Core Areas in Overlapping Ranges of the Sleepy Lizard Tiliqua Rugosa written by Gregory Dale Kerr and published by . This book was released on 2006 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Movement Patterns in the Monogamous Sleepy Lizard Tiliqua Rugosa written by Gregory Dale Kerr and published by . This book was released on 2006 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings written by and published by . This book was released on 2009 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Causes and Consequences of Sleepy Lizard Tiliqua Rugosa Social Networks written by Stephan Timo Leu and published by . This book was released on 2010 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Home Range Fidelity in the Australian Sleepy Lizard Tiliqua Rugosa written by C. Michael Bull and published by . This book was released on 1999 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sexually Dimorphic Head Sizes and Reproductive Success in the Sleepy Lizard Tiliqua Rugosa written by C. Michael Bull and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Orientation in the Australian Sleepy Lizard Tiliqua Rugosa written by Michael John Freake and published by . This book was released on 1996 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Tick Transmited Haemogregarinid of the Australian Sleepy Lizard Tiliqua Rugosa Belongs to the Genus Hemolivia written by Catherine Jane Smallridge and published by . This book was released on 1997 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Home Range Overlap of Mothers and Their Offspring in the Sleepy Lizard Tiliqua Rugosa written by C. Michael Bull and published by . This book was released on 1998 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Influence of Parasites on the Retention of Long term Partnerships in the Australian Sleepy Lizard Tiliqua Rugosa written by C. Michael Bull and published by . This book was released on 2006 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Animal Social Networks written by Dr. Jens Krause and published by Oxford University Press. This book was released on 2015 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt: The scientific study of networks - computer, social, and biological - has received an enormous amount of interest in recent years. However, the network approach has been applied to the field of animal behaviour relatively late compared to many other biological disciplines. Understanding social network structure is of great importance for biologists since the structural characteristics of any network will affect its constituent members and influence a range of diverse behaviours. These include finding and choosing a sexual partner, developing and maintaining cooperative relationships, and engaging in foraging and anti-predator behavior. This novel text provides an overview of the insights that network analysis has provided into major biological processes, and how it has enhanced our understanding of the social organisation of several important taxonomic groups. It brings together researchers from a wide range of disciplines with the aim of providing both an overview of the power of the network approach for understanding patterns and process in animal populations, as well as outlining how current methodological constraints and challenges can be overcome. Animal Social Networks is principally aimed at graduate level students and researchers in the fields of ecology, zoology, animal behaviour, and evolutionary biology but will also be of interest to social scientists.
