Abstract Fisheries bycatch is the greatest threat to migratory, long‐lived marine animals. Addressing ultimately requires changing fisher behaviour, yet social and behavioural sciences are rarely applied mitigation, with an absence of theory‐informed behaviour change interventions. Moreover, mitigating particularly challenging in small‐scale mixed‐species fisheries (SSFs), where perceptions target non‐target vary widely, all catches have economic or subsistence value. Such ubiquitous...

As a hotspot of species diversity and fishing pressure, Indonesia is global priority for the conservation sharks, rays their cartilaginous relatives (herein 'sharks'). The high value marine tourism industry in can create economic incentives protecting sustainably managing ecosystems species, including sharks. This study estimates shark ray explores tourist preferences local community perceptions to understand current potential future role this conservation. We identified 24 hotspots across...

Scalloped Hammerhead shark (Sphyrna lewini) is an endangered species which its populations have been declining globally including in Indonesia, the world’s top fishing country. However, there a lack of information on recent population structure this to promote proper management and conservation status. This study aimed investigate genetic diversity, structure, connectivity S. lewini population, three major landing sites: Aceh (n = 41), Balikpapan 30), Lombok 29). Meanwhile, additional...

Abstract The “rhinorays” (giant guitarfish‐Glaucostegidae and wedgefish‐Rhinidae) are a critically endangered group of “shark‐like rays,” which have experienced steep global population declines in the past decade due to overfishing. Their slow life histories high market value increase risk trade‐driven extinction lead trade‐offs between conservation objectives fishers' economic objectives. As such, it is important understand social ecological dimensions rhinorays identify feasible...

Abstract Indonesia is the heart of Coral Triangle–the global epicenter for marine biodiversity, and home to many endemic, threatened protected species. There a need rapid, low-cost methods better identify tackle seafood fraud in because also world’s largest shark fishing nation. Levels domestic consumption sharks their relatives are thought be significant, with different drivers across products geographies, including active passive consumption, where consumers being unaware species origin...

It has long been recognised that national oil companies (NOCs) offer the means for funding and delivering fuel subsidies as a politically valuable good. But what happens when begins to run out? Fiscal pressures will clearly increase, but there is also evidence net importers with NOCs are still more likely have than those without. A key question about countries moving through this transition therefore whether how role of in subsidy regime changes classic logic erodes. We examine these issues...

Abstract Sharks and rays are vulnerable species, which highly exploited in Indonesian waters but lacked of detailed information on their ecology fisheries status. This research aims to assess the level vulnerability sharks overfishing using maximum intrinsic rate population increase (r max ), derived from Euler-Lotka equation, as a proxy extinction risk. It is calculated based several biological parameters including fecundity, age, age at maturity, number offspring. Using rmax calculation...

The silky shark (Carcharhinus falciformis) is the most common landed in Indonesian waters, including Indian Ocean. However, even though they are frequently caught, there a lack of information on population and abundance sharks Cilacap Tanjung Luar two Indonesia’s fishery hotspots, both located edge Ocean, which part Fisheries Management Area (FMA) 573. fishers from places usually have fishing grounds that particular fisheries management area. This research aims to update abundance,...

Despite increasing academic research citation on biology, abundance, and the behavior of blacktip reef sharks, influence fish population density sharks: Carcharhinus melanopterus Triaenodon obesus in its habitat were largely unassessed. This present study examined correlation between abundance fishes family/species with sharks Southern Waters Morotai Island. The existence was measured Audible Stationary Count (ASC) methods surveyed using Underwater Visual Census (UVC) combined Diver Operated...

Bentfin devil ray (Mobula thurstoni) was recorded for the first time in Morotai waters on 3rd March 2017. In a conservation management context, it is important to clarify population of Mobula thurstoni and their relations with habitat. Thus, we examined existence physical parameters: depth, temperature, visibility, current, weather, tidal. We measured Underwater Visual Census (UVC) combined Diver Operated Video (DOV) census. The research from 14th July 2017 (50 dives) showed Frequency...

HighlightUtilization, Growth, and Population of Bullet Tuna (Auxis rochei Risso 1810) in Indian Ocean Southern Sumbawa (2020)Eligibility Status Kawakawa (Euthynnus affinis Cantor, 1849) from Lombok Strait (2020)Biological Aspect Parent Candidate White-spotted Rabbitfish (Siganus canaliculatus) Serewe Bay, Timur District (2020)Study Sustainability Management Malabar Blood Snapper Fisheries the Coastal Waters, Regency (2020)Growth Rate Survivorship Acropora sp. Fragments that Transplanted on...

Abstract Tonic immobility is an induce method to achieve a temporary condition of cataleptic-like, which sudden loss muscle tone, as result various procedures such situate the object in “unnatural” position or situation. This has been widely applied on elasmobranch species, except for species Hemiscyllidae. study was intended assess application tonic Hemiscyllium halmahera - endemic shark Halmahera Islands, Indonesia. Our shown that average induction time ranged from 11.49 40.12 seconds,...

Fisheries bycatch is the greatest threat to migratory, long-lived marine animals. Managing can be particularly problematic in small-scale mixed-species fisheries, where perceptions of target and non-target vary widely, all catches have economic or subsistence value. Such fisheries are ubiquitous throughout world’s oceans, represent a cross-disciplinary challenge for biodiversity, food security livelihoods. We offer novel approach addressing this challenge, drawing on well-established...

Aceh province, in the westernmost part of Indonesia, is one top contributors to country's elasmobranch fisheries. Here, we discuss some proposed interventions and their feasibility towards thresher shark fisheries South-west Aceh. Fisheries managers must focus more on poverty alleviation discover alternative livelihood options reduce dependence threatened sharks coastal communities. Thresher are oceanic occupying tropical temperate seas (Compagno, 1984). They easily recognized by long tail...

Abstract The waters of North Maluku Province are known as a hotspot for sharks in Indonesia. However, despite the richness and importance shark population this area, information about fisheries trade remains limited. aim research was to fill knowledge gap by identifying characteristics region. We conducted interviews field observations during August 2017 two case study regencies: South Halmahera Morotai. result show that targeted fishing is practiced Mano village, Gomumu Island, Posi-posi...

Abstract The elevated extinction risk of elasmobranchs is proportional with the increase fishing mortality due to overfishing. Indonesia biggest shark country in world, Tanjung Luar as a village specifically targeting sharks. More than 30 species sharks and rays that have been landed recently received increased conservation status under International Union for Conservation Nature (IUCN). This research aimed analyze catch abundance vulnerable or endangered identify seasons. Four years landing...

Abstract Thresher sharks (family Alopiidae) are an evolutionarily distinct and globally endangered species group. Indonesia is the world’s largest shark fishing nation, a global priority for reducing capture of threatened species. Kutaradja port one Indonesia’s ports, located in capital Aceh Province, Banda Aceh, Western Indonesia. large oceanic serving variety fisheries, from small scale to industrial fleets. One main fisheries operating purse seine fleet targeting valuable pelagic fish,...

Abstract Nebrius ferrugineus , or tawny nurse shark, is a species of carpet shark distributed across the tropical Indo-Pacific region. This has little species-specific information on biology and fisheries. The listed as “Vulnerable” IUCN Redlist rarely seen, recorded, studied in Indonesia. We recorded this during SCUBA diving Morotai waters April 2022. Recorded live encounters by activities Indonesia are even more scarce. In Morotai, North Maluku, anecdotally exists reports from divers,...

Context Giant guitarfish (Family: Glaucostegidae) and wedgefish Rhinidae) (Critically Endangered, IUCN Red List CITES Appendix II) are highly exploited throughout their distribution because of valued fins in the international market. Both commonly caught as bycatch or secondary valuable catch Java Sea, including Karimunjawa National Park, Central Java, Indonesia. Aims Assess presence relative abundance giant species Park adjacent waters. Methods Data were collected using baited remote...

We recorded 23 Ranong guitarfish (Rhinobatos ranongensis) in Southwest Aceh, Indonesia. Measured specimens ranged between 72 and 87 cm total length. There are 20 species (Genus Rhinobatos) so far, three of them have been Indonesia: Jimbaran shovelnose ray jimbaranensis), Indonesian pengali) Shaw’s thouiniana). Rhinobatos ranongensis is listed as Vulnerable by IUCN found the Eastern Indian Ocean. The only samples from Andaman Sea, Myanmar western Thailand. that landed Aceh first Indonesia...