ORCID Profile
0000-0002-7834-0211
Current Organisation
James Cook University
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
Publisher: Cold Spring Harbor Laboratory
Date: 18-04-2019
DOI: 10.1101/608935
Abstract: Shark-like rays (Order Rhinopristiformes) are among the most threatened families of marine fish. Yet little is known about their populations, as these rays are normally taken as opportunistic catch in fisheries targeting other species and are thus poorly reported. One exception is the Indonesian tangle net fishery, which targets shark-like rays. Market surveys of Muara Angke landing site in Jakarta, north-western Java (including one frozen shipment from Benoa Harbour, Bali), were conducted between 2001 and 2005, and recorded landed catch for this fishery. Recent catch data from Indonesian Capture Fisheries (2017 – 2018) were also examined to provide contemporary information about landed catch. 1,559 elasmobranchs (sharks and rays) were recorded, comprised of 24 species of rays and nine species of sharks. The most abundant species landed were the pink whipray Pateobatis fai and the bottlenose wedgefish Rhynchobatus australiae , the latter being the main target species. Catch composition varied based on differences in species catchability and may also be indicative of localized declines. The fishery was highly selective for larger sized in iduals, however smaller size classes of target species were also caught in other Indonesian fisheries resulting in fishing pressure across all age classes. Evidence of substantial declines in global landings of wedgefish species, and the observed shift in catch composition in the Indonesian tangle net fishery, increases concerns about the status of shark-like rays and stingrays in Indonesia.
Publisher: Cold Spring Harbor Laboratory
Date: 21-03-2019
DOI: 10.1101/584557
Abstract: Recent evidence of widespread and rapid declines of wedgefishes, guitarfishes, and banjo ray populations (Order Rhinopristiformes), driven by a high demand for their fins in Asian markets and the quality of their flesh, raises concern about their risk of over-exploitation and extinction. Using life history theory and incorporating uncertainty into a modified Euler-Lotka model, maximum intrinsic rates of population increase ( r max ) were estimated for nine species from the four families of rhinopristiforms. Estimates of median r max varied from −0.04 to 0.60 year −1 among the nine species, but generally increased with increasing maximum size. In comparison to 115 other species of chondrichthyans for which r max values were available, the families Rhinidae and Glaucostegidae are relatively productive, while most species from Rhinobatidae and Trygonorrhinidae had relatively low r max values. If the demand for their high value products can be addressed, then population recovery for this species is likely possible but will vary depending on the species.
Publisher: American Association for the Advancement of Science (AAAS)
Date: 16-06-2023
Abstract: A global survey of coral reefs reveals that overfishing is driving resident shark species toward extinction, causing ersity deficits in reef elasmobranch (shark and ray) assemblages. Our species-level analysis revealed global declines of 60 to 73% for five common resident reef shark species and that in idual shark species were not detected at 34 to 47% of surveyed reefs. As reefs become more shark-depleted, rays begin to dominate assemblages. Shark-dominated assemblages persist in wealthy nations with strong governance and in highly protected areas, whereas poverty, weak governance, and a lack of shark management are associated with depauperate assemblages mainly composed of rays. Without action to address these ersity deficits, loss of ecological function and ecosystem services will increasingly affect human communities.
Publisher: Wiley
Date: 15-07-2020
Publisher: Springer Science and Business Media LLC
Date: 22-07-2020
Publisher: Public Library of Science (PLoS)
Date: 21-11-2019
Publisher: CSIRO Publishing
Date: 2021
DOI: 10.1071/MF20291
Publisher: Springer Science and Business Media LLC
Date: 09-2021
Publisher: Wiley
Date: 22-12-2022
DOI: 10.1002/AQC.3754
Abstract: Shark‐like rays (Order Rhinopristiformes) are among the most threatened families of marine fish, yet little is known about their populations. These rays are normally taken as opportunistic catch in fisheries targeting other species and are thus poorly reported. One exception is the Indonesian tangle net fishery, which targets shark‐like rays. Market surveys of Muara Angke landing site in Jakarta, north‐western Java were conducted between 2001 and 2005, and the landed catch from the tangle net fishery was recorded (the Muara Angke landing site includes landings from more than one fishery). In total, 1,559 elasmobranchs (sharks and rays) were recorded, comprising 24 species of rays and nine species of sharks. The most abundant species landed were the pink whipray Pateobatis fai and the bottlenose wedgefish Rhynchobatus australiae , the latter being the main target species. Catch composition varied based on differences in species catchability and may also be indicative of localized declines. The fishery was highly selective for larger sized in iduals, while smaller size classes of many ray species, including the target species, were also caught in other Indonesian fisheries, resulting in fishing pressure across all age classes. The decline of tangle net vessels in the fishery and the potential shift in catch composition in the Indonesian tangle net fishery increase concerns about the status of shark‐like rays and stingrays in Indonesia.
No related grants have been discovered for Brooke D'Alberto.