https://nova.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:27878 Wed 11 Apr 2018 10:26:27 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:32621 -6) and followed by variants in GAPVD1 (GTPase activating protein and VPS9 domains 1; combined P-value 5.83 × 10^-5) and near ZNF697 (combined P-value 8.15 × 10^-5).]]> Tue 26 Jun 2018 14:58:14 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:43896 Tue 05 Sep 2023 14:45:12 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:53499 Thu 30 Nov 2023 15:57:52 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:46415 Thu 24 Nov 2022 13:56:58 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:38796 Thu 03 Feb 2022 12:42:36 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:5505 Sat 24 Mar 2018 07:47:02 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:26888 B. dendrobatidis infection, and survival were monitored at 1, 4, and 12 months. The effect of salt on the abundance of nontarget organisms was also investigated in before and after style analyses. Salinities remained constant over time with little intervention. Hosts in water bodies with 4 ppt salt had a significantly lower prevalence of chytrid infection and higher survival, following metamorphosis, than hosts in 0 ppt salt. Tadpoles in the 4 ppt group were smaller in length after 1 month in the release site than those in the 0 and 2 ppt groups, but after metamorphosis body size in all water bodies was similar . In water bodies with 4 ppt salt, the abundance of dwarf tree frogs (Litoria fallax), dragonfly larvae, and damselfly larvae was lower than in water bodies with 0 and 2 ppt salt, which could have knock-on effects for community structure. Based on our results, salt may be an effective field-based B. dendrobatidis mitigation tool for lentic amphibians that could contribute to the conservation of numerous susceptible species. However, as in all conservation efforts, these benefits need to be weighed against negative effects on both target and nontarget organisms.]]> Sat 24 Mar 2018 07:41:41 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:28982 Sat 24 Mar 2018 07:29:26 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:26986 Batrachochytrium dendrobatidis, temperature and humidity refuge areas for amphibian hosts exist but are difficult to manipulate. Other environmental features that may affect the outcome of infection include water quality, drying regimes, abundance of alternate hosts and isolation from other hosts. We identified relationships between water bodies with these features and infection levels in the free-living hosts inhabiting them. Where significant relationships were identified, we used a series of controlled experiments to test for causation. Infection loads were negatively correlated with the salt concentration of the aquatic habitat and the degree of water level fluctuation and positively correlated with fish abundance. However, only the relationship with salt was confirmed experimentally. Free-living hosts inhabiting water bodies with mean salinities of up to 3.5 ppt had lower infection loads than those exposed to less salt. The experiment confirmed that exposure to sodium chloride concentrations >2 ppt significantly reduced host infection loads compared to no exposure (0 ppt). These results suggest that the exposure of amphibians to salt concentrations found naturally in lentic habitats may be responsible for the persistence of some susceptible species in the presence of B. dendrobatidis. By manipulating the salinity of water bodies, it may be possible to create refuges for declining amphibians, thus allowing them to be reintroduced to their former ranges.]]> Sat 24 Mar 2018 07:25:50 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:32314 Mon 23 Sep 2019 12:52:02 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:47571 Mon 23 Jan 2023 13:46:24 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:47552 Mon 23 Jan 2023 12:29:50 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:43398 Mon 04 Sep 2023 13:18:03 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:32085 Batrachochytrium dendrobatidis (Bd) is correlated with several environmental variables, including salinity, temperature, and moisture content, which influence the pathogen’s growth and survival. Habitats that contain these environmental variables at levels outside of those optimal for Bd growth and survival may facilitate the survival of susceptible host species. Therefore, manipulation of environmental salinity is a potential management strategy to help conserve Bd-susceptible species. However, host behaviour also influences disease dynamics, and the success of habitat manipulation programs depends on how hosts use this altered habitat. Aims: To assess if the Bd-susceptible green and golden bell frog, Litoria aurea, will select waterbodies with a salinity increased to S = 3; if this selection is affected by infection; and if a frog’s time in a waterbody of this salinity affects infection load or blood physiology. Methods: We conducted a filmed choice experiment and a 3-year field study where infected and uninfected frogs could choose between fresh or saline waterbodies. Key results: In both the laboratory experiment and field study, Bd-infected L. aurea spent a significantly greater amount of time in or closer to a waterbody than uninfected frogs. Experimentally infected frogs tended to prefer the saline water over fresh, but their choice of water usage did not differ statistically from uninfected frogs. In the field, frogs began to avoid ponds when salinities rose above S = 5. Conclusions: Because both wild and captive, and infected and uninfected L. aurea readily selected waterbodies with a salinity of S = 3, this salinity could potentially be used as a passive method for reducing the severity of Bd when managing this species. However, further testing is needed to understand the efficacy of this treatment, and care must be taken to prevent salinities rising above S = 5, because this level seems to produce an avoidance response and therefore may not be suitable in every location. Implications: Manipulation of aquatic habitats may be a worthwhile focus for Bd management in habitats where water level fluctuations are minimal.]]> Fri 27 Apr 2018 14:12:51 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:24284 Fri 18 Nov 2016 10:49:49 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:54666 Fri 08 Mar 2024 10:57:17 AEDT ]]>