ORCID Profile
0000-0001-5157-4635
Current Organisation
James Cook University
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Publisher: Frontiers Media SA
Date: 28-04-2020
Publisher: Wiley
Date: 22-07-2020
DOI: 10.1111/JBI.13931
Publisher: Elsevier BV
Date: 05-2023
Publisher: Cold Spring Harbor Laboratory
Date: 20-06-2020
DOI: 10.1101/2020.06.19.160887
Abstract: The Wakatobi National Park (WNP) at the heart of Coral Triangle is an important area for cetaceans in Indonesia. Currently there is insufficient information on spatio-temporal occurrence patterns of cetaceans to inform effective conservation strategies. This study used platforms of opportunity from May 2004 to May 2012 as a cost-effective way to address this knowledge gap. A database was created of cetacean sightings per surveyed days at sea, allowing for an analysis of species ersity and habitat use around the islands. A total of 11 cetacean species were identified. Spinner and bottlenose dolphins were sighted most often, followed by melon-headed and sperm whales. Spinner dolphin showed a wide distribution in the area, whilst bottlenose dolphin and melon-headed whale occupied the waters between the main islands and south atolls. Sperm whales occurred mostly in waters to the north of the main islands and as melon-headed whales were mostly found in deep waters. Most cetacean sightings occurred in the zones designated for human use, indicating where potential conflicts might occur. No sightings were found in the Park core zone, indicating a mismatch between WNP design and the ecological needs of the cetaceans. A sub-s le of the data from dedicated fishing monitoring trips was used to derive a sighting frequency. Occurrence of both small and large cetaceans was highest during inter-monsoonal seasons, possibly related to an increase of prey availability due to seasonal upwelling and increase in survey activity. Inter-annual occurrence of cetaceans was variable, with no large cetaceans being sighted in 2010-2012, likely due to reduced survey efforts. In areas with limited resources for designated surveys, the use of platforms of opportunity can be a cost-effective tool to provide valuable data on cetacean occurrence. It helps identify potentially important areas as well as highlight where to direct designated research efforts. We discuss the implications of our findings for the conservation management of these cetaceans and give suggestions for improved marine park management.
Publisher: SAGE Publications
Date: 2016
DOI: 10.5367/TE.2014.0433
Abstract: Nature-based tourism can be an important source of income for regional economies but relies on a healthy environment. Using data collected from business and non-business visitors to Australia’s coast adjacent to the Great Barrier Reef, the authors generate estimates of the potential financial impact of environmental degradation, demonstrating a novel way of testing and controlling for hypothetical response bias. More than 90% of non-business visitors and 67% of business visitors came to the region for at least one nature-related reason. Average daily expenditure was similar for both visitor segments (≈AUD$190), but the determinants of expenditure varied. All visitors reacted much more negatively to the prospect of environmental degradation than to a 20% increase in (local) prices, although business visitors were much less responsive than non-business visitors. Adjusting for hypothetical response bias, the authors estimate that substantial environmental degradation could reduce visitor expenditures (and thus local tourism incomes) by at least 17%.
Publisher: Frontiers Media SA
Date: 23-06-2021
DOI: 10.3389/FMARS.2021.606998
Abstract: A low-cost, small-boat, rapid assessment survey was conducted on the waters off the southern Peninsula of Bali. The objectives were: (1) to conduct an inventory of cetacean species in the study area (2) to map cetacean distribution to inform the design of the Badung MPA (3) to estimate relative abundance of cetaceans and record information on presence and distribution of other marine megafauna and (4) to train observers in the use of distance s ling methods. The survey adopted a “training while doing” approach to build local capacity for marine bio ersity monitoring, while collecting a snapshot of data to assess species richness and distribution. The survey accomplished its first two objectives, but due to violation of underlying assumptions, had mixed success with the third objective. Our survey revealed that the waters off the southern Peninsula of Bali support a rich cetacean fauna, with at least seven cetacean species, other marine megafauna, and avian species. Seven cetacean species found on our survey include: spinner dolphin ( Stenella longirostris ), pantropical spotted dolphin ( Stenella attenuata ), Fraser’s dolphin ( Lagenodephis hosei ), Risso’s dolphin ( Gr us griseus ), bottlenose dolphin ( Tursiops sp.), Bryde’s whale ( Balaenoptera edeni ), and sperm whale ( Physeter macrocephalus ). Density estimates were low for all whales combined, but seem implausibly high for dolphins likely due to violation of assumptions of distance s ling methods. Future surveys should include sufficient time for training to generate reliable abundance estimates. A dedicated bycatch study is needed to understand sustainability of bycatch mortality relative to reliable abundance estimates.
Publisher: Cold Spring Harbor Laboratory
Date: 15-07-2020
DOI: 10.1101/2020.07.14.203240
Abstract: Indonesia harbours a high ersity of cetaceans, yet effective conservation is h ered by a lack of knowledge about cetacean spatial distribution and habitat preferences. This study aims to address this knowledge gap at an adequate resolution to support national cetacean conservation and management planning. Maximum Entropy (Maxent) modelling was used to map the distribution of 15 selected cetacean species in seven areas within Indonesian waters using recent cetacean presence datasets as well as environmental predictors (topographic and oceanographic variables). We then combined the in idual species suitable habitat maps and overlaid them with provincial marine spatial planning (MSP) jurisdictions, marine protected areas (MPAs), oil and gas contract areas, and marine traffic density. Our results reflect a great heterogeneity in distribution among species and within species among different locations. This heterogeneity reflects an interrelated influence of topographic variables and oceanographic processes on the distribution of cetacean species. Bathymetry, distance to-coast and −200m isobaths, and Chl and SST were important variables influencing distribution of most species in many regions. Areas rich in species were mainly related to high coastal or insular-reef complexity, representing high productivity and upwelling-modified waters. Although some important suitable habitats currently fall within MPAs, other areas are not and overlap with oil and gas exploration activities and marine traffic, indicating potentially high risk areas for cetaceans. The results of this study can support national cetacean conservation and management planning, and be used to reduce or avoid adverse anthropogenic threats. We advise considering currently unprotected suitable cetacean habitats in MPA and MSP development.
Publisher: Elsevier BV
Date: 07-2021
Publisher: Springer Science and Business Media LLC
Date: 30-05-2022
DOI: 10.1007/S10531-022-02401-0
Abstract: We reviewed Coram et al. (Bio ers Conserv 30:2341–2359, 2021, 10.1007/s10531-021-02196-6 ), a paper that highlights the use of social media data to understand marine litter and marine mammals in Southeast Asia. While we commend its intent, we find that the methodology used and conclusions drawn portray an incomplete and inaccurate perception of how strandings, stranding response, and analysis of stranding data have been conducted in the region. By focusing on investigative results revealed by a very limited search of one social media platform (Facebook), using only English keywords, and insufficient ground-truthing, Coram et al. (2021) have, unintentionally, given the perception that Southeast Asian scientists have not conducted even the bare minimum of investigation required to better understand the issue of marine litter and its impact on marine mammals. In this commentary we provide a more accurate account of strandings research in Asia and include recommendations to improve future studies using social media to assess conservation issues.
Publisher: Wiley
Date: 28-07-2020
DOI: 10.1002/AQC.3379
Publisher: Elsevier BV
Date: 05-2021
Publisher: Aquatic Mammals Journal
Date: 15-11-2022
Publisher: Inter-Research Science Center
Date: 16-01-2020
DOI: 10.3354/ESR01008
Publisher: Wiley
Date: 20-07-2020
DOI: 10.1111/MMS.12719
Publisher: Frontiers Media SA
Date: 21-10-2020
Publisher: Elsevier BV
Date: 07-2020
Publisher: Elsevier BV
Date: 07-2012
Publisher: MDPI AG
Date: 04-11-2022
Abstract: Analyses of the spatial and temporal patterns of 26 years of stranding events (1995–2011 and 2012–2021, n = 568) in Indonesia were conducted to improve the country’s stranding response. The Emerging Hot Spot Analysis was used to obtain the spatial and temporal hotspot patterns. A total of 92.4% events were single stranding, while the remaining were of mass stranding events. More stranding events were recorded between 2012 and 2021 in more dispersed locations compared to the previous period. Within the constraints of our s ling limitations, East Kalimantan and Bali were single stranding hotspots and consecutive hotspots. East Java and Sabu-Raijua in East Nusa Tenggara were mass stranding hotspots. Temporally, Raja Ampat (West Papua) experienced a significant increase in case numbers. The presence of active NGOs, in iduals or government agencies in some locations might have inflated the numbers of reported cases compared to areas with less active institutions and/or in iduals. However, our results still give a good understanding of the progression of Indonesia’s stranding responses and good guidance of resource allocation for the stranding network. Several locations in Indonesia that need more efforts (e.g., more training workshops on rescue and necropsies) have been identified in this paper. Suggestions to improve data collection (including georeferencing tips) have also been included.
No related grants have been discovered for Putu Mustika.