A5017350681- Ichthyology and Marine Biology
- Marine and fisheries research
- Fish Biology and Ecology Studies
- Fish Ecology and Management Studies
- Coral and Marine Ecosystems Studies
- Marine animal studies overview
- Methane Hydrates and Related Phenomena
- Identification and Quantification in Food
- Geological formations and processes
- Underwater Acoustics Research
- Offshore Engineering and Technologies
- International Maritime Law Issues
- Paleontology and Evolutionary Biology
- Soil and Unsaturated Flow
- Paleontology and Stratigraphy of Fossils
- Turtle Biology and Conservation
- Genomics and Phylogenetic Studies
- Underwater Vehicles and Communication Systems
- Geotechnical Engineering and Soil Mechanics
- Hydrocarbon exploration and reservoir analysis
- Coastal and Marine Management
- Environmental DNA in Biodiversity Studies
- Hydraulic Fracturing and Reservoir Analysis
- Geophysical Methods and Applications
- Seismic Waves and Analysis
South African Institute for Aquatic Biodiversity
2015-2024
Wildlife Conservation Society
2020-2024
Wildlife Conservation Society United Kingdom
2020-2023
Rhodes University
2009-2017
PredictionProbe (United States)
1996-2014
United States Naval Research Laboratory
1996
Stennis Space Center
1990
Coastal Oceans Research and Development in the Indian Ocean
1986
NOAA Atlantic Oceanographic and Meteorological Laboratories
1972
National Oceanic and Atmospheric Administration
1972
Collection of data from animals for research purposes can negatively impact target or by-catch species if suitable animal ethics practices are not followed. This study aimed to assess the ethical requirements peer-reviewed scientific journals that publish primary literature on fishes, and review considerations care guidelines national international documents treatment research, provide an overview general field fishes. A 250 peer-reviewed, ISI-rated publishing fishes revealed nearly half...
This study provides empirical data on the exploitation of fishery resources Sundays Estuary south-east coast South Africa. Total annual effort was estimated at 63 785 angler-hours, which accounted for an yield 16 214 fish (8.0 t). Effort and mean catch per unit exhibited seasonal trends were highest during summer. Dusky kob Argyrosomus japonicus spotted grunter Pomadasys commersonnii most commonly targeted species bulk catch: 3.4 t (43% gravimetrically, 22% numerically) 1.9 (24%...
The Acoustic Tracking Array Platform (ATAP) is a marine science programme that monitors the movements and migrations of inshore animals along South African coastline. Acoustically tagged are monitored by an expanded network approximately 100 automated data-logging acoustic receivers moored at strategic node sites, from Cape Point in west to Africa–Mozambique border east. During five years since its inception, 2011, ATAP has achieved outstanding progress terms numbers variety species tagged....
Abstract The coastline of Sub‐Saharan Africa hosts highly diverse fish communities great conservation value, which are also key resources for local livelihoods. However, many costal ecosystems threatened by overexploitation and their state is frequently unknown due to vast spatial extent limited monitoring budgets. Here, we evaluated the potential citizen science‐based eDNA surveys alleviate such chronic data deficiencies assessed in Mozambique using two 12S metabarcoding primer sets....
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 537:233-245 (2015) - DOI: https://doi.org/10.3354/meps11456 Habitat connectivity and intra-population structure of an estuary-dependent fishery species Amber-Robyn Childs1,2,*, Paul D. Cowley1,2**, Tor F. Næsje2,3, Rhett H. Bennett2 1Department Ichthyology Fisheries Science, Rhodes University, Grahamstown...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 621:185-197 (2019) - DOI: https://doi.org/10.3354/meps12975 Acoustic telemetry reveals multi-seasonal spatiotemporal dynamics of a giant trevally Caranx ignobilis aggregation Ryan Daly1,2,3,*, John D. Filmalter1, Clare A. K. Daly3, Rhett H. Bennett1, Marcos M. Pereira4, Bruce Q. Mann2, Stuart W. Dunlop2, Paul...
Iron-rich sediments chemically similar to those forming at present on the crest of East Pacific Rise have been found just above basement widely separated drill sites in eastern equatorial Pacific, including three Leg 16 Deep Sea Drilling Project. These were probably formed when was this rise and moved their location as a result sea-floor spreading.
Connectivity — movements of animals between and among numerous habitats the factors (rhythmic cycles environmental variables) influencing connectivity juvenile Lichia amia (Teleostei: Carangidae) were assessed in complementary acoustic telemetry studies two geographically separated estuaries (620 km apart) South Africa. The conducted within a nationwide array receivers moored coastal waters. Tagged fish both Kowie (n = 21) Goukou 17) displayed high levels multiple habitat connectivity, with...
Standardised sampling protocols for monitoring fish stocks are essential to assess changes in stock status and provide a means evaluate the effectiveness of fisheries management measures, such as marine protected areas (MPAs). This study aimed optimise two standard methods, namely underwater visual census (UVC) controlled angling, assessing subtidal reef communities. In terms efficiency, variability bias, UVC transects were found be superior point counts. For an effort angler-hours per...
The giant trevally Caranx ignobilis (Forsskål) is an important apex predatory fish typically associated with coral reef communities. It prized in recreational and commercial fisheries, yet little known about its aggregation dynamics susceptibility to fishing pressure. This study reports on a previously undocumented of mature observed over period eight years (2010–2017) at Ponta do Ouro Partial Marine Reserve southern Mozambique. one the few recorded for this carangid western Indian Ocean...
Abstract The white‐spotted wedgefish ( Rhynchobatus djiddensis ) is a Critically Endangered shark‐like ray in the family Rhinidae. Throughout its Western Indian Ocean distribution, it targeted for valuable meat and fins reported to have undergone major population declines. However, there remains need species specific time‐series data accurately assess localized This study used two independent long‐term (37 40 years) catch from competitive shore angling shark nets investigate size composition...
Abstract Acoustic telemetry and long-term seine-netting data were used to assess distribution, area use, home range dynamics movement patterns of estuarine-dependent juvenile white steenbras Lithognathus lithognathus in the temporarily open/closed East Kleinemonde Estuary. Using 15 years biannual data, it was shown that abundance highest mouth region decreased with distance from mouth. Fifteen fish equipped acoustic transmitters monitored for eight months using an array stationary receivers,...
Nosy Be in northwestern Madagascar is home to a globally important whale shark ( Rhincodon typus ) aggregation and growing tourism industry. However, sharks are not protected Malagasy waters threatened by fisheries bycatch, collisions with vessels, disturbance from tourism. We used tourist questionnaires n = 488) assess the economic value of, perceptions September December 2019. also surveyed tour operators 12) 2018 understand their of management needs region. Results suggest industry was...
We present the complete mitochondrial genomes of Critically Endangered whitespotted wedgefish, Rhynchobatus djiddensis (Forsskål, 1775), and bottlenose australiae (Whitley, 1939), with R. mitogenome documented for first time. The are 16,799 16,805 bp in length, respectively. Both comprise 13 protein-coding regions, 22 tRNA genes, two rRNA a non-coding control region. All regions consistently start ATG codon; however, alternative codon GTG is observed at COX1 gene. NADH2, COX2, NADH4 have...
Wedgefishes (Rhinidae) are threatened by unsustainable fishing globally, and especially in the Southwest Indian Ocean (SWIO), due to their high-value fins shark trade. The whitespotted wedgefish Rhynchobatus djiddensis bottlenose R. australiae both classified as Critically Endangered on IUCN Red List of Threatened Species, yet a lack species-specific knowledge taxonomic uncertainty still exists within this genus. Genetic approaches aid classification identifying distinct populations for...
Here, we summarise the extinction risk of sharks and rays endemic to coastal, shelf, slope waters southwest Indian Ocean adjacent (SWIO+, Namibia Kenya, including SWIO islands). This region is a hotspot evolutionarily distinct rays. Nearly one-fifth ( n = 13 70, 18.6%) are threatened, these: one Critically Endangered, five seven Vulnerable. A further (10.0%) Near Threatened, 33 (47.1%) Least Concern, 17 (24.3%) Data Deficient. While primary threat overfishing, there first signs that climate...
The spatial dynamics and home range sizes of early juvenile white steenbras (Lithognathus lithognathus Cuvier, 1829) in the permanently open Great Fish Estuary, South Africa, were assessed using acoustic telemetry. Seven individuals (154–184 mm fork length) tagged with transmitters spent majority their time mesohaline to oligohaline regions estuary, between five seven kilometres from mouth. Mean size was small (97 399 ± 22 557 m2, mean S.D.) relative estuary (approx. 1 360 000 m2). length...
Understanding the level of connectivity between estuarine and coastal waters is essential for appropriate management estuarine-associated taxa. Most studies have focused on role a single estuary, while limited research exists importance multiple estuaries to individuals species. This study used acoustic telemetry assess usage by estuarine-dependent spotted grunter Pomadasys commersonnii. Twenty-six adult fish were tagged with transmitters in Kariega Bushmans estuaries, South Africa, their...
We would like to comment on a recent paper by Plint et al. (2012) that discusses mud transport across Cretaceous shelf. The authors have taken heart research advocates looking for evidence of bedload aggregated clays, and we are comfortable much the clay component in Kaskapau Formation did indeed arrive via rather than simply settling out water column. However, whereas perfectly with proposed mode transport, do several concerns suggestions concerning one type aggregate discussed (2012). In...