scholarly journals Generation of reproductively mature offspring from the endangered green and golden bell frog Litoria aurea using cryopreserved spermatozoa

2021 ◽  
Author(s):  
Rose Upton ◽  
Simon Clulow ◽  
Natalie E. Calatayud ◽  
Kim Colyvas ◽  
Rebecca G. Y. Seeto ◽  
...  
Keyword(s):  
Litoria Aurea

scholarly journals Predator Presence and Vegetation Density Affect Capture Rates and Detectability of Litoria aurea Tadpoles: Wide-Ranging Implications for a Common Survey Technique

PLoS ONE ◽  
2015 ◽  
Vol 10 (11) ◽  
pp. e0143733 ◽  
Author(s):  
Madeleine R. Sanders ◽  
Simon Clulow ◽  
Deborah S. Bower ◽  
John Clulow ◽  
Michael J. Mahony
Keyword(s):  
Vegetation Density ◽  
Litoria Aurea ◽  
Survey Technique ◽  
Capture Rates

Differences in microhabitat selection patterns between a remnant and constructed landscape following management intervention

2017 ◽  
Vol 44 (3) ◽  
pp. 248 ◽  
Author(s):  
Jose W. Valdez ◽  
Kaya Klop-Toker ◽  
Michelle P. Stockwell ◽  
Loren Fardell ◽  
Simon Clulow ◽  
...  
Keyword(s):  
Aquatic Vegetation ◽  
Management Strategies ◽  
Probability Of Detection ◽  
Microhabitat Use ◽  
Microhabitat Selection ◽  
Habitat Creation ◽  
Litoria Aurea ◽  
Use Of Resources ◽  
Detection Probabilities ◽  
Future Management

Context Achieving successful conservation outcomes in habitat creation and reintroductions requires an understanding of how species use their habitat and respond to these interventions. However, few initiatives directly compare microhabitat selection between remnant and managed habitats to measure effectiveness and evaluate outcomes. Probability of detection is also rarely included in studies on microhabitat use, which may lead to erroneous conclusions if detectability varies between variables. Methods In this study, we used the endangered green and golden bell frog (Litoria aurea) to compare differences in microhabitat-use patterns in both a remnant and a constructed habitat. A detectability study was also conducted to determine detection probabilities among microhabitats. Key results Aquatic vegetation was used more than expected in both the remnant and constructed habitats, and rock piles were utilised less than expected in the constructed habitat, despite their recommendation in most habitat templates. We found that detection probabilities altered the outcomes of abundance estimates for nearly all the measured microhabitat variables. Conclusions Future management for this species should focus on providing high proportions of aquatic vegetation. Furthermore, although rock piles have been utilised greatly in past L. aurea habitat creation, placing large rocks on a managed site is expensive and time consuming. Future management initiatives may need to focus on providing smaller proportion of rocks, which would be a more appropriate use of resources. Implications With conservation management projects increasing over the next few decades, understanding habitat use before implementing strategies should be a priority as it will provide important insights and inform decision-making for optimum habitat creation and restoration. Furthermore, accounting for detectability in microhabitat use studies is essential to avoid wrong conclusions that may negatively affect the success of ecological management strategies.

The structural organization of aurein precursor cDNAs from the skin secretion of the Australian green and golden bell frog, Litoria aurea

2005 ◽  
Vol 128 (1) ◽  
pp. 75-83 ◽  
Author(s):  
Tianbao Chen ◽  
Christopher Scott ◽  
Lijun Tang ◽  
Mei Zhou ◽  
Chris Shaw
Keyword(s):  
Structural Organization ◽  
Skin Secretion ◽  
Litoria Aurea

scholarly journals Novel use of statistics to determine precise relationship assignment to estimate breeding output of a threatened amphibian with tadpole genotypes

2020 ◽  
Author(s):  
Chad Beranek ◽  
Kim Colyvas ◽  
John Clulow ◽  
Michael Mahony
Keyword(s):  
Function Analysis ◽  
Reproductive Ecology ◽  
Molecular Ecology ◽  
Pedigree Information ◽  
Genotype Data ◽  
Likelihood Estimator ◽  
Free Living ◽  
Litoria Aurea ◽  
Precise Relationship

Relatedness (rxy) measures are useful in molecular ecology studies as they can provide a means to answer biological hypotheses where pedigree information is valuable. Our understanding of the reproductive ecology of the threatened amphibian Litoria aurea is not complete where applying rxy measurements may provide further elucidation. Here we use SNPs to identify which rxy estimators (or combination of) most precisely assign relationships in L. aurea tadpoles to determine how many breeding pairs contribute to producing propagules in explosive breeding events. We aimed to (1) use simulated L. aurea genotype data to determine the precision of six rxy estimators, (2) compare the precision of relationship assignment thresholds between rxy estimators computed by discriminant function analysis (DFA) and test if using multiple estimators improved precision, and (3) Apply the best performing DFA model to assign relationships in wild tadpoles to quantify how many mating pairs reproduced in explosive breeding events. We hypothesised that each tadpole cohort produced during explosive breeding events would be conceived by >|2| mating pairs. The triadic maximum likelihood estimator had the highest Pearson’s R2 (0.92) and the lowest amount of misclassifications in the DFA (16.00%). A multi-variate DFA that included three rxy estimators further reduced the misclassifications down to 11.88%. There was evidence that more than one mating pair contributed to each explosive breeding event (n = 11). We show that the multi-variate DFA enabled precise relationship classification of free-living tadpoles which improved knowledge on amphibian reproductive ecology. We recommend this method for relationship assignments in SNP genotyped datasets.

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