https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:48961 Wed 19 Apr 2023 12:34:46 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:36271 Notamacropus eugenii), to investigate whether Lucrin Depot (AbbVie), a GnRH agonist microsphere preparation, could (1) inhibit follicular development and estrus in a cycle reactivated by removal of pouch young (RPY) and (2) facilitate a synchronous return to estrus. Our results show that females reactivated with bromocriptine and RPY in early seasonal quiescence (July 2015) were inhibited by Lucrin Depot (0.125-0.5 mg kg ^-1, n=9) and unlike control females (n=3), did not copulate before Day 32 RPY. During the next breeding season (February 2016), the return to estrus after RPY was not delayed in animals treated with Lucrin Depot (=0.20 mg kg ^-1; n=12), and copulation occurred in treated and control females within the expected natural period after RPY (Day 26-33 RPY). In the following breeding season (March 2017), estrus was delayed in animals treated with Lucrin Depot (1.25 mg kg ^-1) on either Day 0 (Group A, n=6) or Day 10 (Group B, n=6) after RPY compared to control females (n=6). Estrus was detected in Group A between 39 and 66 days (55 ± 4.8d) and in Group B between 43 and 71 days (55.2 ± 3.9d) after RPY. In contrast, all control females underwent estrus and copulated as expected by Day 30 RPY. We conclude Lucrin Depot can inhibit ovarian follicular activity after RPY but as a standalone treatment does not result in a highly synchronous return to estrus in the tammar wallaby.]]> Wed 18 Mar 2020 17:07:30 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:51013 Wed 16 Aug 2023 09:06:40 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:51011 Wed 16 Aug 2023 08:45:11 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:51048 Wed 13 Mar 2024 07:45:01 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:54395 Wed 13 Mar 2024 07:44:31 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:13427 Wed 11 Apr 2018 17:02:19 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:31440 Wed 11 Apr 2018 15:57:06 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:19056 Wed 11 Apr 2018 15:45:47 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:9696 Wed 11 Apr 2018 13:34:21 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:5831 Wed 11 Apr 2018 10:30:15 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:49292 Wed 10 May 2023 13:41:04 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:51046 Wed 07 Feb 2024 16:43:58 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:49182 Wed 07 Feb 2024 15:20:24 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:51284 Wed 06 Mar 2024 15:39:43 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:50698 Wed 02 Aug 2023 11:59:23 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:36347 Frontiers in Ecology and Evolution, 7, No. 374.]]> Wed 01 Apr 2020 15:00:30 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:23928 Litoria aurea, which exhibits high temporal variability in population size due to its fast life-history traits. Projections of population size from the viability model were highly variable, and removing parametric uncertainty only slightly improved overall model certainty, thus demonstrating the limits of population viability analysis for predicting abundance in fast life-history species. Sensitivity analysis identified recruitment of adults, female survival, male survival and rate of maturity as having the most impact on population viability. This population viability model provides a starting point to incorporate future research findings and better elucidate the causes of local extinction in this species. This study also reinforces the importance of egg-juvenile survival for amphibian populations, but also exemplifies the variability of amphibian viability analyses for identifying important parameters. As a case study for amphibian conservation, this analysis shows the utility of population viability analyses for fast life-history species, even with incomplete knowledge of all life-history stages.]]> Tue 31 Jul 2018 16:35:16 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:54572 Tue 14 May 2024 14:27:24 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:51606 Tue 12 Sep 2023 13:43:13 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:52365 Tue 10 Oct 2023 14:32:44 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:36801 Tue 07 Jul 2020 09:41:42 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:40069 3 mm; 14 ± 2.1 and 15.3 ± 2.1 follicles >3 mm in the CL-bearing ovary and contralateral ovary respectively. Similarly, females in the SOvn Group had 11.4 ± 2.4 and 17.4 ± 1.9 follicles >3 mm in each respective ovary. Uterine flushing and ovarian histology confirmed that females in LucrinþSOvn and SOvn Groups had not ovulated, but normal oocytes were present in the follicles. By comparison, the Control Group had ovulated with a single embryo being recovered from the uterus of 4 of 5 females. In contrast to all groups, females in the Lucrin Group showed follicular suppression (all follicles <1.5 mm) and an unstimulated reproductive tract. We conclude that a suppression plus stimulation regimen using Lucrin Depot followed by PMSG and hCG has the capacity to synchronise oestrus, and that 20 IU of PMSG stimulates the development of antral follicles >3 mm in both ovaries. However, a single 500 IU treatment of hCG on Day 23 RPY was not able to induce ovulation in the tammar wallaby.]]> Tue 05 Jul 2022 08:00:42 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:55495 Tue 04 Jun 2024 15:45:40 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:34867 Tue 03 Sep 2019 18:01:56 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:51199 Thu 24 Aug 2023 14:58:57 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:53557 Thu 14 Mar 2024 08:46:39 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:49331 Thu 11 May 2023 15:21:02 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:42947 Thu 08 Sep 2022 16:18:21 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:38798 Thu 03 Feb 2022 14:20:31 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:9098 100 g/l Red-necked avocets and stilts are common. Because saline lakes generally have more abundant food than freshwater lakes, waterbirds tend to be more abundant on them. However, most species do not utilize them for breeding, unless islands are present as in Lake Wyara. Bird numbers fluctuate widely in response to many factors, including food availability and state of wetlands elsewhere in the inland. Birds move freely between fresh and saline waters and are nomadic between wetlands across the vast Australian inland. Some Paroo salinas and their birds are threatened by localized siltation and local freshwater lakes could be destroyed by water harvesting for desert irrigation. The effect of water harvesting on other inland wetlands could also affect the Paroo and its salinas.]]> Sat 24 Mar 2018 10:47:41 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:7517 Sat 24 Mar 2018 08:38:30 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:9540 Sat 24 Mar 2018 08:35:49 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:10074 Sat 24 Mar 2018 08:12:53 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:19302 Sat 24 Mar 2018 07:56:07 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:19194 Sat 24 Mar 2018 07:54:59 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:5693 Sat 24 Mar 2018 07:48:35 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:6471 Sat 24 Mar 2018 07:47:14 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:5246 Sat 24 Mar 2018 07:44:18 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:26282 Litoria aurea) has a number of behavioural traits which suggest conspecific attraction occurs via a vocal mechanism, including a loud conspicuous call and large chorusing aggregations. To date, attempts to repopulate restored and created habitat through natural immigration and active translocation of tadpoles and juveniles have been met with limited success for this species. We used L. aurea to determine if distribution could be manipulated via conspecific attraction using artificial communication cues. We placed speaker systems in uninhabited areas of five inhabited ponds across two locations and broadcast calls of L. aurea to see if we could manipulate distribution into previously unoccupied pond areas. Surveys undertaken before and after broadcast indicate that we successfully manipulated L. aurea distribution for adults increasing both occupancy and calling around the speaker locations. This occurred in four of five replicate ponds over three months of experimental treatment, but controls remained low in abundance. We suggest that manipulation of distribution via conspecific attraction mechanisms could be a useful conservation tool for endangered amphibian habitat restoration and creation programmes, resulting in increased occupancy and programme success.]]> Sat 24 Mar 2018 07:40:12 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:27957 Sat 24 Mar 2018 07:38:46 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:25976 Sat 24 Mar 2018 07:37:02 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:28845 litoria aurea, l. castanea, and l. raniformis. there is considerable debate about the role of threatening processes in the decline and uncertainty in how best to develop conservation mitigation strategies for these species. to develop a clear picture of the research priorities necessary to enhance the conservation outcomes for the three species we conducted a literature review to focus on the critical gaps in ecological understanding that prevents consensus, and to set research priorities to address these gaps. Unresolved questions were identified and prioritized, and a set of priority research directions and management actions considered to be integral for the persistence of the species were formulated.]]> Sat 24 Mar 2018 07:33:21 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:26628 Batrachochytrium dendrobatidis has been a major contributing factor to the global decline of amphibians. Knowledge of the distribution of B. dendrobatidis can contribute to understanding patterns of species decline and prioritizing action. Therefore, we surveyed four spatially distinct populations of a B. dendrobatidis susceptible species, the green and golden bell frog (Litoria aurea), for evidence of infection in the population. Three mainland populations were infected at a prevalence of 3.5-28.3 %, with median infection loads of 0.28-627.18 genomic equivalents (GE). Conversely, we did not detect infection in an island population 3 km from the mainland; the isolation and infrequent visitation of the island suggests that the pathogen has not arrived. Management actions for B. dendrobatidis and conservation of susceptible frog species are heavily dependent on the presence and absence of the pathogen in the population. Prevention of the accidental introduction of B. dendrobatidis and safe guarding genetic diversity of L. aurea is necessary to preserve unique diversity of the island population, whereas containment and control of the pathogen can be directed towards mainland populations. Knowledge of disease dynamics also provides a context to understand the ecology of remaining populations as variation in the physiology or habitat of the mainland populations have facilitated persistence of these populations alongside B. dendrobatidis. Other islands should be a priority target in disease surveillance, to discover refuges that can assist conservation.]]> Sat 24 Mar 2018 07:26:48 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:3858 Sat 24 Mar 2018 07:23:22 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:3680 Sat 24 Mar 2018 07:23:01 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:23031 Sat 24 Mar 2018 07:13:50 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:23886 Litoria aurea) using radio tracking methods during winter when detection is low and knowledge is limited. We followed 26 individuals between May and July, 2011 to determine whether they selected specific overwintering microhabitats and related this to levels of individual exposure to predators, distance from the edge of the water and temperature of microhabitats. We found that overwintering bell frogs inhabited reeds and rock gabions more frequently than expected and that females used a reduced subset of microhabitats compared to males. Additionally, microhabitats used were more likely to conceal an individual from view, and the majority of overwintering sites were located within 5m of the edge of the water which may be important for reducing the risk of predation and desiccation. Rock gabions had significantly warmer (1.2°C-1.8°C) mean temperatures than the other microhabitats used. The information presented here can be used in habitat creation and reintroduction programmes to provide habitat which is suitable during both the breeding and non-breeding season for the conservation of other populations.]]> Sat 24 Mar 2018 07:13:40 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:32441 Mon 23 Sep 2019 13:26:24 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:34893 Mon 23 Sep 2019 12:23:10 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:32726 Mon 23 Sep 2019 12:03:32 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:49559 Mon 22 May 2023 09:13:16 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:18625 Mon 20 Jul 2015 16:38:23 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:52499 Mon 16 Oct 2023 09:27:45 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:48231 Mon 08 May 2023 10:21:10 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:54088 Mon 05 Feb 2024 09:21:29 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:40005 Eucalyptus dealbata subsp. aperticola S.A.J.Bell & D.Nicolle, a new mallee red gum from Triassic aged sandstone benches in the northern part of Wollemi National Park north-west of Sydney, is described and illustrated, and notes on affinities, distribution, ecology and conservation status provided.]]> Mon 04 Jul 2022 08:26:31 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:34849 Mon 02 Mar 2020 13:40:50 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:37668 Dendronephthya australis, with its limited distribution along the central New South Wales (NSW) coastline, forms a habitat within the benthic estuarine environment that supports commercially significant and protected marine species. However, the functional role of the soft coral within this system is unknown. Organisms from primary producers through to secondary consumers were sampled from soft coral and sponge habitats inside the Port Stephens estuary, NSW, Australia in 2014. A food web model of the benthic habitat, created using stable isotopes of carbon and nitrogen, was used to describe the functional role of the soft coral in comparison to sponges, another important habitat for commercially significant and protected marine species. Primary consumers accessed a range of benthic and pelagic energy sources; however, secondary consumers were almost entirely dependent on pelagic energy sources. Soft coral and sponges accessed different primary sources for their energy requirements. There was no evidence that D. australis was used as a direct food source by consumers other than nudibranchs. In contrast, sponges were trophically linked with secondary consumers and are likely to play a direct role in pelagic energy transfer. Amphipods collected from the branches of D. australis were identified as major prey components in the diet of protected syngnathids, suggesting that while the soft coral functions as critical habitat, it is indirectly linked to higher trophic levels.]]> Fri 25 Jun 2021 13:34:15 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:54932 Fri 22 Mar 2024 14:34:29 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:39724 Senecio (Asteraceae), where both threatened and invasive species occur within Australia. In this study, propagule geometry, settling velocity and dispersal potential for two range-restricted and threatened native taxa (S. linearifolious var. dangarensis Belcher ex I.Thomps., S. spathulatus var. attenuatus I.Thomps.) are contrasted with four native taxa that occupy wider ranges (S. amygdalifolius F.Muell., S. l. var. arachnoideus I.Thomps., S. l. var. macrodontus (DC.) I.Thomps., S. pinnatifolius A.Rich. var. pinnatifolius) and one introduced, wide-ranging species (S. madagascariensis Poir.). Differences were found in settling velocity and propagule morphology across all taxa. Based on propagule morphology, S. amygdalifolius has the greatest dispersal potential, S. spathulatus var. attenuatus the smallest, whereas all other taxa were similar. Although useful, dispersal potential alone does not fully explain distributional differences between all range-restricted and widespread taxa, and close assessment of habitat attributes may be required to further elucidate dispersal limitations in some taxa.]]> Fri 17 Jun 2022 17:38:12 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:47350 Fri 13 Jan 2023 13:12:36 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:49400 Fri 12 May 2023 14:41:06 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:41767 Fri 12 Aug 2022 11:49:24 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:49805 Fri 02 Jun 2023 16:59:49 AEST ]]>