1
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Tina FW, Muramatsu D. Males signal their breeding burrow characteristics to females in the fiddler crab Austruca perplexa. BEHAVIOUR 2022. [DOI: 10.1163/1568539x-bja10165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Abstract
Females often choose mates based on their courtship signals. Males may signal their heritable genetic quality, defended resources, or parental care efforts; however, the reasons why females choose males based on their signals are often not clear. Here, we show that, in the fiddler crab Austruca perplexa, male signals (major-claw waving rates) were correlated with important characteristics of their defended resources (width and depth of breeding burrows). By using the male signals, females may be able to roughly predict the burrow quality and decide whether to enter and check the burrow characteristics. The signals are predicted to be honest because the female’s final decision is based on burrow quality. Since females can reject males if their burrow quality is insufficient for breeding, the courtship efforts of deceptive males will be dismissed. The honesty of the signals is beneficial for both sexes and thus easily evolved in their signalling system.
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Affiliation(s)
- Fahmida Wazed Tina
- Faculty of Science and Technology, Nakhon Si Thammarat Rajabhat University, Tha Ngio, Nakhon Si Thammarat 80280, Thailand
| | - Daisuke Muramatsu
- , Nara University of Education, Takabatake-cho, Nara, 630-8528, Japan
- Wildlife Research Center, Kyoto University, 2-24 Sekiden, Tanaka, Sakyo, Kyoto 606-8203, Japan
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2
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Hoffmann EP, Mitchell NJ. Breeding phenology of a terrestrial‐breeding frog is associated with soil water potential: Implications for conservation in a changing climate. AUSTRAL ECOL 2021. [DOI: 10.1111/aec.13122] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Emily P. Hoffmann
- School of School of Biological Sciences The University of Western Australia Crawley Western Australia 6009 Australia
| | - Nicola J. Mitchell
- School of School of Biological Sciences The University of Western Australia Crawley Western Australia 6009 Australia
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3
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Hoffmann EP, Cavanough KL, Mitchell NJ. Low desiccation and thermal tolerance constrains a terrestrial amphibian to a rare and disappearing microclimate niche. CONSERVATION PHYSIOLOGY 2021; 9:coab027. [PMID: 33959292 PMCID: PMC8084025 DOI: 10.1093/conphys/coab027] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 02/25/2021] [Accepted: 03/29/2021] [Indexed: 05/30/2023]
Abstract
Drier and hotter conditions caused by climate change threaten species that exist close to their physiological limits, as well as those with limited ability to move. Habitat specialists may also be particularly vulnerable if they have specific abiotic requirements. Here we assess whether thermal and hydric constraints can explain the highly restricted and declining distributions of the critically endangered terrestrial-breeding frog, Geocrinia alba. We also evaluate the species' vulnerability to climate change based on the similarity of current microclimatic conditions to their physiological limits. We found that G. alba had low thresholds of thermal and desiccation tolerance relative to other anuran species. The estimated thermal optimum (Topt ) and critical thermal maxima (CTmax ) were 23.3°C and 29.6°C, respectively, and adult frogs had an absorption threshold (AT, the lowest water potential at which water can be absorbed from a substrate) of -50 kPa, the lowest recorded for an amphibian. Comparing environmental conditions and water loss in the field using agar models showed that riparian habitats where frogs occur provide a unique microclimate in the landscape, offering significantly lower desiccation risk during extreme summer conditions compared to immediately adjacent riparian and terrestrial habitats. Monitoring of microclimate conditions within occupied frog habitats over 2 years showed that in extreme dry and hot years the AT was exceeded at six of eight sites, and Topt was exceeded at two of eight sites. Given their specific physiological limits, the apparent rarity of suitable microclimates and a regional drying-warming trend, we suggest that G. alba occupies a potentially disappearing niche and may be indicative of other habitat specialists that rely on ephemeral drainages. More broadly, this study highlights that desiccation thresholds may tightly constrain amphibian distributions and need to be considered along with thermal tolerance thresholds when predicting the impacts of climate change.
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Affiliation(s)
- Emily P Hoffmann
- School of Biological Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia
| | - Karen L Cavanough
- Perth Zoo, Department of Biodiversity, Conservation and Attractions, PO Box 489, South Perth, Western Australia 6951, Australia
| | - Nicola J Mitchell
- School of Biological Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia
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4
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Kelleher SR, Scheele BC, Silla AJ, Keogh JS, Hunter DA, Endler JA, Byrne PG. Disease influences male advertisement and mating outcomes in a critically endangered amphibian. Anim Behav 2021. [DOI: 10.1016/j.anbehav.2021.01.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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5
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O’Brien DM, Silla AJ, Forsythe PS, Byrne PG. Sex differences in response to environmental and social breeding cues in an amphibian. BEHAVIOUR 2021. [DOI: 10.1163/1568539x-bja10072] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Abstract
The relative influence of climatic and social factors on sex-specific variation in reproductive behaviour remains poorly understood. Here, we examine the influence of multiple climatic cues in combination with a social cue on the reproductive behaviours of males and females in a terrestrial breeding toadlet (Pseudophryne coriacea). Over a 115-day breeding season, arrival patterns of each sex, and male calling activity, were recorded daily, while climatic variables were logged continuously. Multivariate analysis showed that arrival of males at the breeding site, as well as male nightly calling activity, were most strongly influenced by a climatic variable (rainfall). By contrast, female arrival was strongly correlated with a social variable (male calling activity), with abiotic conditions having no influence, other than a moderate influence of lunar phase (lunar illumination). These results suggest that cues used for breeding are sex specific and provide new evidence that combinations of climatic and social cues can be integrated into breeding decisions.
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Affiliation(s)
- Daniel M. O’Brien
- School of Earth, Atmospheric and Life Sciences, University of Wollongong, NSW 2522, Australia
| | - Aimee J. Silla
- School of Earth, Atmospheric and Life Sciences, University of Wollongong, NSW 2522, Australia
| | - Patrick S. Forsythe
- University of Wisconsin–Green Bay, Department of Natural and Applied Sciences, 2420 Nicolet Drive, Green Bay, WI 54311, USA
| | - Phillip G. Byrne
- School of Earth, Atmospheric and Life Sciences, University of Wollongong, NSW 2522, Australia
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6
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Mathwin R, Wassens S, Young J, Ye Q, Bradshaw CJA. Manipulating water for amphibian conservation. CONSERVATION BIOLOGY : THE JOURNAL OF THE SOCIETY FOR CONSERVATION BIOLOGY 2021; 35:24-34. [PMID: 32189374 DOI: 10.1111/cobi.13501] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 02/04/2020] [Accepted: 03/06/2020] [Indexed: 06/10/2023]
Abstract
Amphibian populations globally are in decline. One great threat is the abstraction of water resources that alter surface-water hydrology. Conservation actions aimed at restoring or manipulating surface water are employed as a management tool, but empirical evidence on the effectiveness of these approaches is scarce. In this systematic review, we summarized the global experience of manipulating water for amphibian conservation. We explored examples of manipulating water to conserve amphibian species and communities. Approaches varied in their frequency of implementation and in their success. Extending hydroperiod to match larval requirements showed encouraging results, as did off-season drying to control predators. Spraying water into the environment showed several potential applications, but successes were limited. Despite some promising interventions, we identified few (n = 17) empirically supported examples of successful water manipulation to benefit amphibians. It is unclear whether this stems from publication bias or if it is an artifact of language selection. However, manipulating water shows some potential in amphibian conservation, particularly at sites with a proximal water source and in regions where aridity is increasing due to climate change. Regardless of the scale of the intervention or its perceived probability of success, high-quality reporting of empirical results will further understanding of how water manipulations can benefit threatened amphibian populations.
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Affiliation(s)
- Rupert Mathwin
- Global Ecology, College of Science and Engineering, Flinders University, P.O. Box 2100, Adelaide, South Australia, 5001, Australia
| | - Skye Wassens
- School of Environmental Sciences, Charles Sturt University, P.O. Box 789, Albury, New South Wales, 2640, Australia
| | - Jeanne Young
- College of Science and Engineering, Flinders University, P.O. Box 2100, Adelaide, South Australia, 5001, Australia
| | - Qifeng Ye
- College of Science and Engineering, Flinders University, P.O. Box 2100, Adelaide, South Australia, 5001, Australia
- Inland Waters, South Australian Research and Development Institute, 2 Hamra Ave, West Beach, South Australia, 5024, Australia
| | - Corey J A Bradshaw
- Global Ecology, College of Science and Engineering, Flinders University, P.O. Box 2100, Adelaide, South Australia, 5001, Australia
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7
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Byrne PG, Keogh JS, O'Brien DM, Gaitan-Espitia JD, Silla AJ. Evidence that genetic compatibility underpins female mate choice in a monandrous amphibian. Evolution 2021; 75:529-541. [PMID: 33389749 DOI: 10.1111/evo.14160] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 12/03/2020] [Accepted: 12/16/2020] [Indexed: 12/24/2022]
Abstract
Mate choice for genetic benefits remains controversial, largely because few studies have estimated the relative contributions of additive and non-additive sources of genetic variation to offspring fitness. Moreover, there remains a deficit of these estimates for species where female-mate preferences have been quantified in the wild, especially species characterized by monandry or monogamy. Here, we use artificial fertilization techniques combined with a cross-classified breeding design to simultaneously test for "good genes" and "compatible genes" benefits of mate choice in the monandrous red backed toadlet (Pseudophryne coriacea). In addition, we used a genomic approach to estimate effects of parental-genetic relatedness (assessed using 27, 768 single nucleotide polymorphisms) on offspring fitness. Our results revealed no significant additive genetic effects (sire effects), but highly significant non-additive genetic effects (sire × dam interaction effects), on fertilization success, survival during embryonic development, and hatching success. We also found significant associations between parental genetic similarity and offspring survival (whereby survival was higher when parents were more related), and significant positive relationships between fertilization success and embryo survival through to hatching. These results indicate that offspring viability is significantly influenced by the genetic compatibility of parental genotypes, that more related parents are more genetically compatible, and that gametes with greater compatibility at fertilization produce more viable offspring. More broadly, our findings provide new quantitative genetic evidence that genetic incompatibility underpins female mate preferences. Continued quantitative genetic assessment of the relative importance of good genes versus compatible genes is needed to ascertain the general importance of genetic benefits as a driver of female mate choice.
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Affiliation(s)
- Phillip G Byrne
- School of Earth, Atmospheric and Life Sciences, University of Wollongong, Wollongong, New South Wales, Australia
| | - J Scott Keogh
- Ecology & Evolution, Research School of Biology, The Australian National University, Canberra, Australian Capital Territory, Australia
| | - Daniel M O'Brien
- School of Earth, Atmospheric and Life Sciences, University of Wollongong, Wollongong, New South Wales, Australia
| | - Juan Diego Gaitan-Espitia
- The Swire Institute of Marine Science, School of Biological Sciences, The University of Hong Kong, Hong Kong SAR, China
| | - Aimee J Silla
- School of Earth, Atmospheric and Life Sciences, University of Wollongong, Wollongong, New South Wales, Australia
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8
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Nest site selection in a terrestrial breeding frog: interrelationships between nest moisture, pH and male advertisement. Anim Behav 2020. [DOI: 10.1016/j.anbehav.2020.08.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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9
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Sasson DA, Johnson TD, Scott ER, Fowler-Finn KD. Short-term water deprivation has widespread effects on mating behaviour in a harvestman. Anim Behav 2020. [DOI: 10.1016/j.anbehav.2020.04.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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10
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Rudin-Bitterli TS, Evans JP, Mitchell NJ. Geographic variation in adult and embryonic desiccation tolerance in a terrestrial-breeding frog. Evolution 2020; 74:1186-1199. [PMID: 32255513 DOI: 10.1111/evo.13973] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Revised: 02/28/2020] [Accepted: 03/09/2020] [Indexed: 02/03/2023]
Abstract
Intraspecific variation in the ability of individuals to tolerate environmental perturbations is often neglected when considering the impacts of climate change. Yet this information is potentially crucial for mitigating deleterious effects of climate change on threatened species. Here we assessed patterns of intraspecific variation in desiccation tolerance in the frog Pseudophryne guentheri, a terrestrial-breeding species experiencing a drying climate. Adult frogs were collected from six populations across a rainfall gradient and their dehydration and rehydration rates were assessed. We also compared desiccation tolerance of embryos and hatchlings originating from within-population parental crosses from four of the populations. Embryos were reared on soil at three soil-water potentials and their desiccation tolerance was assessed across a range of traits. We found significant and strong patterns of intraspecific variation in almost all traits, both in adults and first-generation offspring. Adult frogs exhibited clinal variation in their water balance responses, with populations from drier sites both dehydrating and rehydrating more slowly compared to frogs from more mesic sites. Similarly, desiccation tolerance of first-generation offspring was significantly greater in populations from xeric sites. Our findings suggest that populations within this species will respond differently to the regional reduction in rainfall predicted by climate change models.
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Affiliation(s)
- Tabitha Silja Rudin-Bitterli
- School of Biological Sciences, The University of Western Australia, Crawley, Western Australia, 6009, Australia.,Centre for Evolutionary Biology, The University of Western Australia, Crawley, Western Australia, 6009, Australia
| | - Jonathan Paul Evans
- School of Biological Sciences, The University of Western Australia, Crawley, Western Australia, 6009, Australia.,Centre for Evolutionary Biology, The University of Western Australia, Crawley, Western Australia, 6009, Australia
| | - Nicola Jane Mitchell
- School of Biological Sciences, The University of Western Australia, Crawley, Western Australia, 6009, Australia
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11
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Byrne PG, Gaitan‐Espitia JD, Silla AJ. Genetic benefits of extreme sequential polyandry in a terrestrial‐breeding frog. Evolution 2019; 73:1972-1985. [DOI: 10.1111/evo.13823] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 07/03/2019] [Indexed: 12/30/2022]
Affiliation(s)
- Phillip G. Byrne
- School of Earth, Atmospheric and Life SciencesUniversity of Wollongong Wollongong New South Wales Australia 2522
| | - Juan Diego Gaitan‐Espitia
- The Swire Institute of Marine Science, School of Biological SciencesThe University of Hong Kong Pokfulam Rd Hong Kong SAR China
| | - Aimee J. Silla
- School of Earth, Atmospheric and Life SciencesUniversity of Wollongong Wollongong New South Wales Australia 2522
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12
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Cummins D, Kennington WJ, Rudin-Bitterli T, Mitchell NJ. A genome-wide search for local adaptation in a terrestrial-breeding frog reveals vulnerability to climate change. GLOBAL CHANGE BIOLOGY 2019; 25:3151-3162. [PMID: 31273907 DOI: 10.1111/gcb.14703] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2019] [Accepted: 04/16/2019] [Indexed: 06/09/2023]
Abstract
Terrestrial-breeding amphibians are likely to be vulnerable to warming and drying climates, as their embryos require consistent moisture for successful development. Adaptation to environmental change will depend on sufficient genetic variation existing within or between connected populations. Here, we use Single Nucleotide Polymorphism (SNP) data to investigate genome-wide patterns in genetic diversity, gene flow and local adaptation in a terrestrial-breeding frog (Pseudophryne guentheri) subject to a rapidly drying climate and recent habitat fragmentation. The species was sampled across 12 central and range-edge populations (192 samples), and strong genetic structure was apparent, as were high inbreeding coefficients. Populations showed differences in genetic diversity, and one population lost significant genetic diversity in a decade. More than 500 SNP loci were putatively under directional selection, and 413 of these loci were correlated with environmental variables such as temperature, rainfall, evaporation and soil moisture. One locus showed homology to a gene involved in the activation of maturation in Xenopus oocytes, which may facilitate rapid development of embryos in drier climates. The low genetic diversity, strong population structuring and presence of local adaptation revealed in this study shows why management strategies such as targeted gene flow may be necessary to assist isolated populations to adapt to future climates.
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Affiliation(s)
- Deanne Cummins
- School of Biological Sciences, The University of Western Australia, Crawley, WA, Australia
| | - W Jason Kennington
- School of Biological Sciences, The University of Western Australia, Crawley, WA, Australia
| | - Tabitha Rudin-Bitterli
- School of Biological Sciences, The University of Western Australia, Crawley, WA, Australia
| | - Nicola J Mitchell
- School of Biological Sciences, The University of Western Australia, Crawley, WA, Australia
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13
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Walls SC, Gabor CR. Integrating Behavior and Physiology Into Strategies for Amphibian Conservation. Front Ecol Evol 2019. [DOI: 10.3389/fevo.2019.00234] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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14
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Foster CN, Scheele BC. Feral-horse impacts on corroboree frog habitat in the Australian Alps. WILDLIFE RESEARCH 2019. [DOI: 10.1071/wr18093] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Context Introduced herbivores can have a substantial impact on native plants and animals, particularly in ecosystems that do not share a recent evolutionary history with similar herbivore species. The feral horse, Equus caballus, has a widespread but patchy distribution in Australia, with large populations present in national parks in the Australian Alps. There are few peer-reviewed studies of the impacts of feral horses on ecosystems in this region. However, impacts could be substantial, particularly in wetland and riparian environments that are focal points for horse activity and sensitive to trampling and physical disturbance. Aims In the present study, we used replicated horse exclosures to investigate the effects of feral horses on breeding habitat of the critically endangered northern corroboree frog, Pseudophryne pengilleyi, in the Australian Alps. Methods Pseudophryne pengilleyi constructs nests and lays eggs in dense litter surrounding small, seasonally flooded wetland pools. In 2010, we sampled the litter depth adjacent to pools at eight long-term P. pengilleyi monitoring sites. In 2011, horse exclosures were established at each of the eight sites, such that less than half of the wetland area was inside the exclosure. In 2015, we measured litter depth surrounding pools inside and outside the exclosures, as well as at three additional sites where feral horses were absent. Key results We found that the pool-edge litter was 1.9 times deeper in areas without horses (inside horse-exclosure plots and horse-free sites) than in areas accessible to horses (unfenced areas in horse-occupied sites). Conclusions Our study has presented experimental evidence that horse grazing and trampling reduce breeding-habitat quality for P. pengilleyi, which could result in reduced reproduction success. Implications Ensuring the persistence of high-quality habitat is crucial for the conservation of P. pengilleyi, particularly given the severity of the decline of this species associated with chytrid fungus. Our results have provided direct evidence of a negative feral-horse impact on the habitat of a threatened animal species in the Australian Alps.
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15
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Seasonality and microhabitat selection in a forest-dwelling salamander. Naturwissenschaften 2017; 104:80. [PMID: 28900670 DOI: 10.1007/s00114-017-1500-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Revised: 08/22/2017] [Accepted: 08/24/2017] [Indexed: 10/18/2022]
Abstract
Many small terrestrial vertebrates exhibit limited spatial movement and are considerably exposed to changes in local environmental variables. Among such vertebrates, amphibians at present experience a dramatic decline due to their limited resilience to environmental change. Since the local survival and abundance of amphibians is intrinsically related to the availability of shelters, conservation plans need to take microhabitat requirements into account. In order to gain insight into the terrestrial ecology of the spectacled salamander Salamandrina perspicillata and to identify appropriate forest management strategies, we investigated the salamander's seasonal variability in habitat use of trees as shelters in relation to tree features (size, buttresses, basal holes) and environmental variables in a beech forest in Italy. We used the occupancy approach to assess tree suitability on a non-conventional spatial scale. Our approach provides fine-grained parameters of microhabitat suitability and elucidates many aspects of the salamander's terrestrial ecology. Occupancy changed with the annual life cycle and was higher in autumn than in spring, when females were found closer to the stream in the study area. Salamanders showed a seasonal pattern regarding the trees they occupied and a clear preference for trees with a larger diameter and more burrows. With respect to forest management, we suggest maintaining a suitable number of trees with a trunk diameter exceeding 30 cm. A practice of selective logging along the banks of streams could help maintain an adequate quantity of the appropriate microhabitat. Furthermore, in areas with a presence of salamanders, a good forest management plan requires leaving an adequate buffer zone around streams, which should be wider in autumn than in spring.
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16
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Greenwood O, Mossman HL, Suggitt AJ, Curtis RJ, Maclean IMD. Using in situ management to conserve biodiversity under climate change. J Appl Ecol 2016; 53:885-894. [PMID: 27609987 PMCID: PMC4991270 DOI: 10.1111/1365-2664.12602] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Accepted: 12/10/2015] [Indexed: 11/30/2022]
Abstract
Successful conservation will increasingly depend on our ability to help species cope with climate change. While there has been much attention on accommodating or assisting range shifts, less has been given to the alternative strategy of helping species survive climate change through in situ management.Here we provide a synthesis of published evidence examining whether habitat management can be used to offset the adverse impacts on biodiversity of changes in temperature, water availability and sea-level rise. Our focus is on practical methods whereby the local environmental conditions experienced by organisms can be made more suitable.Many studies suggest that manipulating vegetation structure can alter the temperature and moisture conditions experienced by organisms, and several demonstrate that these altered conditions benefit species as regional climatic conditions become unsuitable. The effects of topography on local climatic conditions are even better understood, but the alteration of topography as a climate adaptation tool is not ingrained in conservation practice. Trials of topographic alteration in the field should therefore be a priority for future research.Coastal systems have the natural capacity to keep pace with climate change, but require sufficient sediment supplies and space for landward migration to do so. There is an extensive literature on managed realignment. While the underlying rationale is simple, successful implementation requires careful consideration of elevation and past land use. Even with careful management, restored habitats may not attain the physical and biological attributes of natural habitats. Synthesis and applications. The recent literature provides a compelling case that some of the adverse effects of climate change can be offset by appropriate management. However, much of the evidence for this is indirect and too few studies provide empirical tests of the long-term effectiveness of these management interventions. It is clear from the existing evidence that some techniques have a higher risk of failure or unexpected outcomes than others and managers will need to make careful choices about which to implement. We have assessed the strength of evidence of these approaches in order to demonstrate to conservation professionals the risks involved.
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Affiliation(s)
- Owen Greenwood
- Environment and Sustainability Institute University of Exeter Penryn Campus Penryn TR10 9FE UK
| | - Hannah L Mossman
- School of Science and the Environment Manchester Metropolitan University Manchester M1 5GD UK
| | - Andrew J Suggitt
- Environment and Sustainability Institute University of Exeter Penryn Campus Penryn TR10 9FE UK
| | - Robin J Curtis
- Environment and Sustainability Institute University of Exeter Penryn Campus Penryn TR10 9FE UK
| | - Ilya M D Maclean
- Environment and Sustainability Institute University of Exeter Penryn Campus Penryn TR10 9FE UK
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17
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Bortosky R, Mathis A. Honest Signaling in Aggressive Contests between Ozark Zigzag Salamanders (Plethodon angusticlavius). COPEIA 2016. [DOI: 10.1643/ce-14-201] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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18
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Ziegler L, Arim M, Bozinovic F. Intraspecific scaling in frog calls: the interplay of temperature, body size and metabolic condition. Oecologia 2015; 181:673-81. [DOI: 10.1007/s00442-015-3499-8] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Accepted: 10/27/2015] [Indexed: 11/30/2022]
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19
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Heap SM, Stuart-Fox D, Byrne PG. Reduction in site fidelity with smaller spatial scale may suggest scale-dependent information use. Behav Ecol 2014. [DOI: 10.1093/beheco/aru230] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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20
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Heap S, Byrne PG. Aggregation and dispersal based on social cues as a nest-site selection strategy in a resource-defence polygynandry mating system. Behav Ecol Sociobiol 2013. [DOI: 10.1007/s00265-013-1488-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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21
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Rowley JJ, Altig R. Nidicolous development in Limnonectes limborgi (Anura, Dicroglossidae). AMPHIBIA-REPTILIA 2012. [DOI: 10.1163/156853812x626179] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The Southeast Asian frog Limnonectes limborgi and the closely related L. hascheanus have been considered direct developers for almost 50 years. We report that rather than having direct development, L. limborgi has nidicolous development (= eggs oviposited terrestrially and larvae are free-living but nonfeeding) from large, nonpigmented eggs laid in a terrestrial nest constructed by the male. Thirteen nests were observed at four sites in Cambodia and Vietnam, five of which contained clutches of up to 15 eggs or tadpoles. Calling males were in attendance regardless of the presence of or developmental stage of their progeny. Large yolk reserves present as late as stage 37 and the lack of organic material in the gut indicate that these tadpoles do not feed. It is likely that L. hascheanus also has nidicolous development.
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Affiliation(s)
- Jodi J.L. Rowley
- 1Australian Museum, 6 College Street, Sydney, NSW, 2010, Australia
| | - Ronald Altig
- 2Department of Biological Sciences, Mississippi State University, MS 39762, USA
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22
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Heap S, Stuart-Fox D, Byrne P. Variation in the effect of repeated intrusions on calling behavior in a territorial toadlet. Behav Ecol 2011. [DOI: 10.1093/beheco/arr161] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Byrne PG, Roberts JD. Evolutionary causes and consequences of sequential polyandry in anuran amphibians. Biol Rev Camb Philos Soc 2011; 87:209-28. [DOI: 10.1111/j.1469-185x.2011.00191.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Shoo LP, Olson DH, McMenamin SK, Murray KA, Van Sluys M, Donnelly MA, Stratford D, Terhivuo J, Merino-Viteri A, Herbert SM, Bishop PJ, Corn PS, Dovey L, Griffiths RA, Lowe K, Mahony M, McCallum H, Shuker JD, Simpkins C, Skerratt LF, Williams SE, Hero JM. Engineering a future for amphibians under climate change. J Appl Ecol 2011. [DOI: 10.1111/j.1365-2664.2010.01942.x] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Hunter D, Osborne W, Smith M, McDougall K. Breeding habitat use and the future management of the critically endangered Southern Corroboree Frog. ECOLOGICAL MANAGEMENT & RESTORATION 2009. [DOI: 10.1111/j.1442-8903.2009.00461.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Byrne PG, Keogh JS. Extreme sequential polyandry insures against nest failure in a frog. Proc Biol Sci 2009; 276:115-20. [PMID: 18782745 PMCID: PMC2614246 DOI: 10.1098/rspb.2008.0794] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2008] [Revised: 08/14/2008] [Accepted: 08/14/2008] [Indexed: 11/12/2022] Open
Abstract
Sequential polyandry may evolve as an insurance mechanism to reduce the risk of choosing a mate that is infertile, closely related, genetically inferior or incompatible, but polyandry also might insure against nest failure in unpredictable environments. Most animals are oviparous, and in species where males provide nest sites whose quality varies substantially and unpredictably, polyandrous females might insure offspring success by distributing their eggs across multiple nests. Here, we test this hypothesis in a wild population of an Australian terrestrial toadlet, a polyandrous species, where males construct nests and remain with broods. We found that females partitioned their eggs across the nests of two to eight males and that more polyandrous females gained a significant increase in mean offspring survivorship. Our results provide evidence for the most extreme case of sequential polyandry yet discovered in a vertebrate and also suggest that insurance against nest failure might favour the evolution of polyandry. We propose that insurance against nest failure might be widespread among oviparous taxa and provide an important explanation for the prevalence of sequential polyandry in nature.
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Affiliation(s)
- Phillip G Byrne
- School of Biological Sciences, Monash University, Melbourne, Victoria 3800, Australia.
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Gregory Byrne P. Strategic Male Calling Behavior in an Australian Terrestrial Toadlet (Pseudophryne Bibronii). COPEIA 2008. [DOI: 10.1643/ce-05-294] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Terrestrial toadlets use chemosignals to recognize conspecifics, locate mates and strategically adjust calling behaviour. Anim Behav 2007. [DOI: 10.1016/j.anbehav.2006.10.033] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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CHAMBERS JOANNE, WILSON JOHNCLARK, WILLIAMSON IAN. Soil pH influences embryonic survival in Pseudophryne bibronii (Anura: Myobatrachidae). AUSTRAL ECOL 2006. [DOI: 10.1111/j.1442-9993.2006.01544.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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