A5003244065- Ichthyology and Marine Biology
- Fish Ecology and Management Studies
- Fish Biology and Ecology Studies
- Identification and Quantification in Food
- Fish biology, ecology, and behavior
- Marine animal studies overview
- Marine and fisheries research
- Coral and Marine Ecosystems Studies
- Environmental DNA in Biodiversity Studies
- Animal Behavior and Reproduction
- Island Studies and Pacific Affairs
- Turtle Biology and Conservation
- Spider Taxonomy and Behavior Studies
- Freshwater macroinvertebrate diversity and ecology
- Plant and animal studies
- Amphibian and Reptile Biology
- Primate Behavior and Ecology
- Aquatic Invertebrate Ecology and Behavior
James Cook University
2018-2025
Hasanuddin University
2023-2025
National Department of Health
2023-2024
Abstract Freshwater ecosystems are highly biodiverse 1 and important for livelihoods economic development 2 , but under substantial stress 3 . To date, comprehensive global assessments of extinction risk have not included any speciose groups primarily living in freshwaters. Consequently, data from predominantly terrestrial tetrapods 4,5 used to guide environmental policy 6 conservation prioritization 7 whereas recent proposals target setting freshwaters use abiotic factors 8–13 However,...
Abstract The Bull Shark ( Carcharhinus leucas ) faces varying levels of exploitation around the world due to its coastal distribution. Information regarding population connectivity is crucial evaluate conservation status and local fishing impacts. In this study, we sampled 922 putative Sharks from 19 locations in first global assessment structure cosmopolitan species. Using a recently developed DNA‐capture approach (DArTcap), samples were genotyped for 3400 nuclear markers. Additionally,...
<title>Abstract</title> Quantifying genetic connectivity between populations of a species is important to understand its conservation and management needs. Genetic implies gene flow among discrete occurring via the dispersal individuals outside their population origin, followed by reproduction. This process can be biased sexes, with increasing evidence sex-biased in elasmobranchs (sharks rays). In this study we assessed historical contemporary threatened Northern River Shark (<italic>Glyphis...
Abstract Fish maw (teleost swim bladder) is a dried seafood product valued highly by Chinese cultures in East Asia, though global supply chains are poorly understood. Here, we describe the rapid development of fish fishery low‐income nation to illustrate how globalization can affect sustainability. In Papua New Guinea (PNG), developed into at ∼$831,000 USD annually between 2014–2018. Its has been driven Asian expatriates, who provide market access and fishing gear local communities. The...
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Abstract Size limits are a common fisheries management strategy that applied to many and species. Most size use minimum legal protect adult fish as per the ‘reproduce at least once’ paradigm, where stock collapse becomes impossible if every can produce one spawner prior harvest. These approaches be useful in determining catch is difficult therefore ineffective potentially cause decline. Shark longline complicated manage due deficiency of species‐level reporting. Catch determine, creating...
In the central west Pacific region, silky sharks (Carcharhinus falciformis) are commonly taken in fisheries, forming up to 95% of incidental elasmobranch bycatch. The present study examined life history (n=553) from Papua New Guinean waters. Age was analysed using sectioned vertebrae, and a multimodel approach applied length-at-age data fit growth models. Females ranged length 65.0- 253.0-cm total (TL), with oldest estimated at 28 years. Males 68.4 271.3cm TL were aged maximum 23 logistic...
The giant freshwater whipray Urogymnus polylepis is a threatened species that vulnerable to riverine and coastal marine pressures. Despite its status, the range of U. still being determined. In this study, photographic evidence in Myanmar was provided through market surveys (2017-2018) social media (Sharks Rays Rakhine Facebook page, 2021). exposed fisheries habitat degradation pressures Myanmar; therefore, conservation management likely needed ensure populations persist into future.
Abstract Aim Biogeographic boundaries and genetic structuring have important effects on the inferences interpretation of effective population size ( N e ) temporal variations, a key genetics parameter. We reconstructed historical demography divergence history vulnerable coastal high‐trophic shark using genomics assessed our ability to detect recent bottleneck events. Location Western Central Indo‐Pacific (IPA), Tropical Atlantic (WTA) Eastern Pacific (EPA). Taxon Carcharhinus leucas (Müller...
Abstract The silky shark (Carcharhinus falciformis) is one of the most heavily fished tropical species globally, and currently there increasing concern for its conservation status. However, large differences ambiguity in life history parameter estimates among regions complicates fisheries management. Using a Leslie matrix model that incorporated stochastic effects, we analysed intraspecific demography C. falciformis using available data from seven regions. Among regions, were observed...
The conservation of threatened elasmobranchs in tropical regions is challenging due to high local reliance on aquatic and marine resources. Due primarily fishing pressure, river sharks ( Glyphis ) sawfishes (Pristidae) have experienced large population declines the Indo-Pacific. Papua New Guinea (PNG) may offer a refuge for these species, as human density low, shark sawfish populations are thought persist. However, few data available species PNG, risk posed by small-scale fishers poorly...
Abstract Sawfish (Pristidae) are considered to be among the most threatened families of elasmobranch (sharks and rays). There is a need gather information on status poorly known sawfish populations assist in global recovery initiatives. This study used interviews with local fishers investigate presence southern Papua New Guinea (PNG) their interactions uses values for small‐scale fishers. A range size classes still encountered throughout PNG, while juvenile largetooth Pristis pristis were...
Small-bodied coastal sharks are often caught as by-catch in fishing operations. Life-history information for these is needed to ascertain the level at which populations potentially affected by fishing. This study determined age, growth and maturity of Carcharhinus coatesi captured prawn trawlers Gulf Papua. Using vertebral aging an information-theoretic multimodel approach, von Bertalanffy model fit data best; parameters were L0=40.6cm±0.8, L∞=74.8cm±2.1, k=0.33year−1±0.06....
Papua New Guinea has been identified as a sawfish ‘stronghold’ nation, however, are threatened by gillnet fishers who often amputate the rostrum to assist in dis-entanglement. Here, we describe an account of recapture emaciated amputee sawfish. We also present safe release guide, developed for small-scale fishery context Guinea.
River sharks (Glyphis spp.) and some sawfishes (Pristidae) inhabit riverine environments, although their long-term habitat use patterns are poorly known. We investigated the diadromous movements of northern river shark garricki), speartooth glyphis), narrow sawfish (Anoxypristis cuspidata), largetooth (Pristis pristis) using in situ laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) on vertebrae to recover elemental ratios over each individual's lifetime. also measured...
Abstract Introductions of non-native fish are intended to have positive social outcomes, although they can also result in negative environmental consequences. Recently, incidental introduction tilapia ( Oreochromis cf. niloticus ) was recorded the Kikori River, Papua New Guinea. This study investigated abundance relative native species Town market, and interviewed market vendors gauge local perception . Market data were collected over eight days with 1474 individual observed. comprised 11.4%...
Abstract Globally, freshwater environments are imperilled, with vertebrate species declining at twice the rate of marine and terrestrial populations. Non‐marine elasmobranchs (freshwater obligates euryhaline generalists) remain understudied overlooked by conservation efforts. This study aimed to adapt apply a vulnerability assessment framework understand priorities Indo‐West Pacific non‐marine elasmobranch species. An exposure sensitivity adaptability (ESA) was used assess environmental...
Understanding the population structure of a species is important to accurately assess its conservation status and manage risk local extinction. The Bull Shark ( Carcharhinus leucas ) faces varying levels exploitation around world due coastal distribution. Information regarding connectivity crucial evaluate fishing impacts. In this study, we sampled 922 putative Sharks from 19 locations in first global assessment cosmopolitan species. Using recently developed DNA-capture approach (DArTcap),...