A5022239591- Marine and fisheries research
- Coral and Marine Ecosystems Studies
- Marine and coastal plant biology
- Fish Ecology and Management Studies
- Marine animal studies overview
- Fish Biology and Ecology Studies
- Aquatic Ecosystems and Biodiversity
- Marine Biology and Ecology Research
- Wildlife Ecology and Conservation
- Arctic and Russian Policy Studies
- Marine Biology and Environmental Chemistry
- Animal Behavior and Reproduction
- Oceanographic and Atmospheric Processes
- Isotope Analysis in Ecology
- Coastal and Marine Management
- Identification and Quantification in Food
- Dental Radiography and Imaging
- Dental Anxiety and Anesthesia Techniques
- Parasite Biology and Host Interactions
- Conservation, Ecology, Wildlife Education
- Water Quality Monitoring Technologies
- Marine Bivalve and Aquaculture Studies
- Mathematical and Theoretical Epidemiology and Ecology Models
- Maritime and Coastal Archaeology
- Endodontics and Root Canal Treatments
Secretariat of the Pacific Community
2018-2024
Department of Biodiversity, Conservation and Attractions
2021
Alphabet (United States)
2019
Parks and Wildlife Service
2015-2017
Curtin University
2012-2014
University of Toronto
2012
Clinical Research Management
2012
Australian Institute of Marine Science
1992-2010
University of Guam
2009-2010
Sultan Qaboos University
2005-2006
Recognition of the complex spatial and temporal variability abundance diversity found in many populations has led to a greater focus on roles heterogeneity, stochasticity, disturbance structure persistence communities. This is directly relevant coral reef communities that are characterized by very high species spatially heterogeneous environment, display stochastic community at small scales, subject major disturbances. We monitored fish assemblages over 14 years fixed sites spread 80 km...
Coral reefs, the most diverse of marine ecosystems, currently experience unprecedented levels degradation. Diseases are now recognized as a major cause mortality in reef-forming corals and complicit phase shifts reef ecosystems to algal-dominated states worldwide. Even so, factors contributing disease occurrence, spread, impact remain poorly understood. Ecosystem resilience has been linked conservation functional diversity, whereas overfishing reduces diversity through cascading, top-down...
Summary Underwater visual census (UVC) using SCUBA is a commonly used method for assessing reef fish communities. Evidence suggests, however, that avoid divers due to the sound of bubbles produced by open‐circuit , and avoidance behaviour more pronounced as fishing pressure increases. Despite potential producing biased counts conclusions, these behavioural effects have rarely been quantified, especially when effectiveness marine protected areas ( MPA s). To test magnitude behaviour, we...
SUMMARY Expert opinion was canvassed to identify crucial knowledge gaps in current understanding of climate change impacts on coral reef fishes. Scientists that had published three or more papers the effects and environmental factors fishes were invited submit five questions that, if addressed, would improve our Thirty-three scientists provided 155 questions, 32 scored these terms of: (i) identifying a gap, (ii) achievability, (iii) applicability broad spectrum species habitats, (iv)...
<title>Abstract</title> Ocean warming is increasing the incidence, scale, and severity of global-scale coral bleaching mortality, culminating in third global event that occurred during record marine heatwaves 2014-2017. While local effects these events have been widely reported, implications remain unknown. Analysis 15,066 reef surveys 2014-2017 revealed 80% surveyed reefs experienced significant 35% mortality. The extent mortality was assessed by extrapolating results from using...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 317:237-244 (2006) - doi:10.3354/meps317237 Bigger is better: size-selective mortality throughout life history of a fast-growing clupeid, Spratelloides gracilis M. G. Meekan1,*, L. Vigliola2, A. Hansen3, P. J. Doherty2, Halford4, H. Carleton2 1Australian Institute Science, PO Box 40197, Casuarina MC, Darwin,...
It has often been regarded that the greatest influence on population dynamics of invertebrate broadcast spawners will be physical and biological processes acting to control dispersal survival larval or presettlement phase rather than any process after settlement. This particularly so with crown-of-thorns starfish, Acanthaster planci, due its enormous fecundity consequent potential for small changes in rates greatly subsequent However, consideration biological, behavioural habitat...
Abstract In 1998, seawater temperature anomalies led to unprecedented levels of coral bleaching on reefs worldwide. We studied the direct effects this thermal event benthic communities and its indirect their associated reef fish at a group remote off NW Australia. Long‐term monitoring assemblages these allowed us compare responses using data series that included 4 years before, 6 following, event. While mortality was evident >30 m depth, it patchy among shallower survey sites with...
Understanding the drivers of structure coral reef fish assemblages is vital for their future conservation. Quantifying separate roles natural from increasing influence anthropogenic factors, such as fishing and climate change, a key component this understanding. It follows that intrinsic role historical biogeographical geomorphological factors must be accounted when trying to understand effects contemporary disturbances fishing.
With the increased frequency of marine heatwaves and related coral mass mortality events, it is imperative that we improve our understanding reef recovery processes including how benthic community compositions can change over time. Coral communities are influenced by many abiotic factors, but on most reefs local anthropogenic disturbances overshadow these factors thus obscuring their influence. Here, leverage a dataset from with very minimal disturbance - uninhabited southern coast world's...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 597:179-190 (2018) - DOI: https://doi.org/10.3354/meps12606 Mortality rates of small juvenile crown-of-thorns starfish Acanthaster planci on Great Barrier Reef: implications for population size and larval settlement thresholds outbreaks John K. Keesing1,2,*, Andrew R. Halford1,3, Karina C. Hall1,4 1Australian...
Techniques are described which enable measurement of mortality rates post-metamorphic Acanthasterplanci (L.) as small 0.5 mm in the field.Results indicate that at this time significant, viz.6.49 % d-' for l-mo-old starfish (mean size = 1.1 mm) decreasing to 1.24 and 0.45 4-(2.7 7-mo-old (5.5 respectively.Experiments involving exclusion predators indicated major source was predation by epibenthic fauna.Results also show presence adequate food supply juvenile A. planci move very little.This...
We used microsatellite markers to assess the population genetic structure of scribbled rabbitfish Siganus spinus in western Pacific. This species is a culturally important food fish Mariana Archipelago and subject high fishing pressure. Our primary hypothesis was test whether individuals resident southern Island chain were genetically distinct hence should be managed as discrete stocks. In addition spatial sampling adults, newly-settled sampled on Guam over four recruitment events temporal...
Abstract Aim We used modelled environmental data to identify important drivers of bioregional patterns demersal fish assemblages characterized by a high proportion endemic species. Location Of 1,600 km coastal marine environment in south‐western Australia. Methods compiled from 1090 stereo‐ BRUV s samples; total ~55,000 individuals belonging 219 Multivariate Regression Trees and Distance‐based Linear Models distinguished which biological and/or variables, amongst an initial set 49, were most...
Abstract We quantify the relative importance of multi‐scale drivers reef fish assemblage structure on isolated coral reefs at intersection Indian and Indo‐Pacific biogeographical provinces. Large (>30 cm), functionally‐important commonly targeted species fish, were surveyed outer crest/front 38 sites spread across three oceanic systems (i.e. Christmas Island, Cocos (Keeling) Islands Rowley Shoals), in tropical Ocean ( c . 1.126 x 106 km 2 ). The effects cover, exposure, fishing pressure,...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 383:261-272 (2009) - DOI: https://doi.org/10.3354/meps07996 Patterns of recovery in catastrophically disturbed reef fish assemblages Andrew R. Halford1,3,*, Johan Perret2 1Australian Institute Science, PMB #3, TMC, Townsville, Queensland 4810, Australia 2Department Soil and Water, EARTH University, Apto....