ORCID Profile
0000-0002-5037-2043
Current Organisations
University of Tasmania
,
Otlet
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Publications
Safeguarding marine life: conservation of biodiversity and ecosystems
Publisher: Authorea, Inc.
Date: 11-11-2020
Goals, challenges, and next steps in transdisciplinary fisheries research: perspectives and experiences from early-career researchers
Publisher: Springer Science and Business Media LLC
Date: 05-08-2022
Spatially explicit risk assessment of marine megafauna vulnerability to Indian Ocean tuna fisheries
Publisher: Wiley
Date: 24-05-2022
DOI: 10.1111/FAF.12676
Abstract: By‐catch is the most significant direct threat marine megafauna face at the global scale. However, the magnitude and spatial patterns of megafauna by‐catch are still poorly understood, especially in regions with very limited monitoring and expanding fisheries. The Indian Ocean is a globally important region for megafauna bio ersity and for tuna fisheries, but has limited by‐catch data. Anecdotal and scattered information indicates high by‐catch could be a major threat. Here, we adapt a Productivity Susceptibility Analysis tool designed for data‐poor contexts to present the first spatially explicit estimates of by‐catch risk of sea turtles, elasmobranchs, and cetaceans in the three major tuna fishing gears (purse seines, longlines, and drift gill nets). Our assessment highlights a potential opportunity for multi‐taxa conservation benefits by concentrating management efforts in particular coastal regions. Most coastal waters in the northern Indian Ocean, including countries that have had a minimal engagement with regional management bodies, stand out as high risk for fisheries interactions. In addition to species known to occur in tuna gears, we find high vulnerability to multiple gear types for many poorly known elasmobranchs that do not fall under any existing conservation and management measures. Our results indicate that current by‐catch mitigation measures, which focus on safe‐release practices, are unlikely to adequately reduce the substantial cumulative fishing impacts on vulnerable species. Preventative solutions that reduce interactions with non‐target species (such as closed areas or seasons, or modifications to gear and fishing tactics) are crucial for alleviating risks to megafauna from fisheries.
Effects of including misidentified sharks in life history analyses: A case study on the Grey Reef shark Carcharhinus amblyrhynchos from papua new Guinea
Publisher: Public Library of Science (PLoS)
Date: 08-04-2016
Mixed-marker approach suggests maternal philopatry and sex-biased behaviours of narrow sawfish Anoxypristis cuspidata
Publisher: Inter-Research Science Center
Date: 28-09-2018
DOI: 10.3354/ESR00912
Climate, currents and species traits contribute to early stages of marine species redistribution
Publisher: Springer Science and Business Media LLC
Date: 03-12-2022
DOI: 10.1038/S42003-022-04273-0
Abstract: Anthropogenic climate change is causing a rapid redistribution of life on Earth, particularly in the ocean, with profound implications for humans. Yet warming-driven range shifts are known to be influenced by a variety of factors whose combined effects are still little understood. Here, we use scientist-verified out-of-range observations from a national citizen-science initiative to assess the combined effect of long-term warming, climate extremes (i.e., heatwaves and cold spells), ocean currents, and species traits on early stages of marine range extensions in two warming ‘hotspot’ regions of southern Australia. We find effects of warming to be contingent upon complex interactions with the strength of ocean currents and their mutual directional agreement, as well as species traits. Our study represents the most comprehensive account to date of factors driving early stages of marine species redistributions, providing important evidence for the assessment of the vulnerability of marine species distributions to climate change.
Novel multimarker comparisons address the genetic population structure of silvertip sharks (Carcharhinus albimarginatus)
Publisher: CSIRO Publishing
Date: 2019
DOI: 10.1071/MF18296
Abstract: The silvertip shark (Carcharhinus albimarginatus) is a reef-associated shark, with an intermittent distribution across the Indo-Pacific Ocean. Owing to global declines, the species is listed as Vulnerable under the International Union of Conservation for Nature Red List. S les from 152C. albimarginatus were collected from three locations: Papua New Guinea (PNG), east Australia and Seychelles. S les were analysed using mitochondrial, microsatellite and double-digest restriction-associated DNA (ddRAD) generated single nucleotide polymorphism markers. As expected across a vast oceanic expanse, no gene flow was identified between south-west Pacific locations and Seychelles for any marker (population differentiation measured using ΦST values 0.92–0.98, FST values 0.036–0.059). Mitochondrial DNA indicated significant population structuring between PNG and east Australia (ΦST=0.102), but nuclear markers suggested connectivity between these geographically close regions (FST=0.000–0.001). In combination with known telemetry movements for C. albimarginatus, our results suggest stepping-stone patterns of movement between regions is likely driven by reproductive requirements. The use of three distinct marker types in this study has facilitated a powerful genetic description of the population connectivity of C. albimarginatus between the three s led regions. Importantly, the connectivity described between PNG and east Australia should be used as a guide for managing the south-west Pacific stock of C. albimarginatus.
Strong trans-Pacific break and local conservation units in the Galapagos shark (Carcharhinus galapagensis) revealed by genome-wide cytonuclear markers
Publisher: Springer Science and Business Media LLC
Date: 11-01-2018
Variability in multiple paternity rates for grey reef sharks (Carcharhinus amblyrhynchos) and scalloped hammerheads (Sphyrna lewini)
Publisher: Springer Science and Business Media LLC
Date: 08-05-2017
DOI: 10.1038/S41598-017-01416-W
Abstract: This study assessed the presence and prevalence of multiple paternity (MP) in litters of grey reef sharks ( Carcharhinus amblyrhynchos ) and scalloped hammerheads ( Sphyrna lewini ) opportunistically caught in Papua New Guinea (PNG). Litter size between species were significantly different with an average of 3.3 pups for grey reef sharks and 17.2 pups for scalloped hammerhead. Using 14 and 10 microsatellite loci respectively, we identified MP in 66% of grey reef sharks (4 out of 6 litters) and 100% MP in scalloped hammerheads (5 litters). We found high paternal skew (the uneven contribution of sires per litter) and a positive correlation between female adult size and litter size in scalloped hammerheads but not in grey reef sharks. Differences in the frequency of MP between species and the identification of paternal skew may be linked with mating strategies and post-copulatory mechanisms. Multiple paternity is thought to benefit populations by enhancing genetic ersity therefore increasing the population’s genetic resilience to extrinsic pressures. The identification of MP in two shark species reported here, further elucidates the complex breeding strategies elasmobranchs undertake.
Otlet; International network and digital infrastructure for research scientists to source biological samples
Publisher: Center for Open Science
Date: 15-04-2019
Abstract: Research teams collect & million biological s les annually, the majority of which are subs led for targeted analysis. The remaining s le, often including a number of unused organs, is then able to be repurposed for additional studies. However, the absence of a systematic method for scientists to source these unused s les results in wasted s les, organisms and opportunities for research as scientists undertake redundant s ling regimes. As such, ‘Otlet’, a global online database, was established to overcome the challenges of sourcing scientific research s les from colleagues. The platform allows the users to 1) upload a record of their unused s les for collaboration, 2) search the database of existing s les from other scientific users and request them directly and, 3) post a request for s les onto a searchable community board. The platform facilitates communication between research teams across different locations, taxa and expertise to foster novel collaborations while accelerating scientific output.Otlet’s newly constructed platform is an important tool for biological scientists of all disciplines to efficiently communicate and source research material. Membership is freely available for scientific use by researchers from universities, government agencies, museums, private consulting and NGOs.
Updated connectivity assessment for the scalloped hammerhead (Sphyrna lewini) in Pacific and Indian Oceans using a multi-marker genetic approach
Publisher: Elsevier BV
Date: 07-2022
Population Structure and Connectivity of Chondrichthyans
Publisher: CRC Press
Date: 02-05-2022
Safeguarding marine life: conservation of biodiversity and ecosystems
Publisher: Springer Science and Business Media LLC
Date: 03-2022
DOI: 10.1007/S11160-022-09700-3
Abstract: Marine ecosystems and their associated bio ersity sustain life on Earth and hold intrinsic value. Critical marine ecosystem services include maintenance of global oxygen and carbon cycles, production of food and energy, and sustenance of human wellbeing. However marine ecosystems are swiftly being degraded due to the unsustainable use of marine environments and a rapidly changing climate. The fundamental challenge for the future is therefore to safeguard marine ecosystem bio ersity, function, and adaptive capacity whilst continuing to provide vital resources for the global population. Here, we use foresighting/hindcasting to consider two plausible futures towards 2030: a business-as-usual trajectory (i.e. continuation of current trends), and a more sustainable but technically achievable future in line with the UN Sustainable Development Goals. We identify key drivers that differentiate these alternative futures and use these to develop an action pathway towards the desirable, more sustainable future. Key to achieving the more sustainable future will be establishing integrative (i.e. across jurisdictions and sectors), adaptive management that supports equitable and sustainable stewardship of marine environments. Conserving marine ecosystems will require recalibrating our social, financial, and industrial relationships with the marine environment. While a sustainable future requires long-term planning and commitment beyond 2030, immediate action is needed to avoid tipping points and avert trajectories of ecosystem decline. By acting now to optimise management and protection of marine ecosystems, building upon existing technologies, and conserving the remaining bio ersity, we can create the best opportunity for a sustainable future in 2030 and beyond.
Reef Shark Science – Key Questions and Future Directions
Publisher: Frontiers Media SA
Date: 30-01-2019
Related Organisations
Related Funding Activities
No related grants have been discovered for Madeline Elizabeth Green.