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Journal articles on the topic 'Sharks'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Yusrina, Firda. "DAMPAK PENGOLAHAN DAN KONSUMSI SUP SIRIP IKAN HIU." Journal of Food Technology and Agroindustry 1, no. 2 (2019): 31–36. http://dx.doi.org/10.24929/jfta.v1i2.748.

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Indonesia is an archipelagic country that consist of 2/3 ocean and 1/3 land. The extensive territorial ocean is certainly have a lot of diversity of marine existence. One of them is shark. There are 25 kinds of sharks in indonesian’s oncean. Lately sharks have become one of the topics discussed in fisheries institutions and fauna activists, due to the increasing activity of hunting shark. Shark finning is cutting off a shark’s fin and throwing the rest of the still-living body, often by dumping it back into the ocean.The body’s sharks without fins are often thrown back into the ocean alive, wh

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Abdel Fattah N. Abd Rabou, Maha F. Gafar, Aliaa M. Mohanna, et al. "A Look at the Deadly Shark Attack on an Israeli Diver off the Mediterranean Coast of Hadera, Palestine." UTTAR PRADESH JOURNAL OF ZOOLOGY 46, no. 12 (2025): 124–42. https://doi.org/10.56557/upjoz/2025/v46i125050.

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The Mediterranean Sea is home to a considerable number of shark species, some of which have posed a threat to humans. The hot waters discharged from the Hadera (Orot Rabin) power plant in northwestern Palestine attract schools of two large coastal shark species: Dusky Sharks (Carcharhinus obscurus Lesueur, 1818) and Sandbar Sharks (Carcharhinus plumbeus Nardo, 1827) every year from November to May. On Monday, April 21, 2025, a 45-year-old Israeli diver was fatally attacked by sharks off the Mediterranean coast of Hadera. The present descriptive study aims to shed light on this rare deadly inci

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Bramasta, Rizaldi Cahya, Elok Faiqoh, I. Gede Hendrawan, Andrianus Sembiring, and Ni Luh Astria Yusmalinda. "Identifikasi Hiu yang Diperdagangkan di Bali Menggunakan Metode DNA Barcoding dan Analisis Filogenetik." Journal of Marine and Aquatic Sciences 7, no. 1 (2021): 84. http://dx.doi.org/10.24843/jmas.2021.v07.i01.p12.

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Sharks are one of the keys for ecosystems balance in the ocean. Sharks as top predators have an important role to maintain the stability of the food chain in the ocean. The loss of sharks will have a major impact on the marine ecosystem, so the presence of sharks in the ocean must be protected from extinction. However, there are some activities such as sharks hunting and trading going on because of the high demand of sharks processed products. Bali is one of the locations of shark fishing and trading activities. The problem is the trade-in sharks have gone through the finning process, leaving

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4

HART, Nathan S., and Shaun P. COLLIN. "Sharks senses and shark repellents." Integrative Zoology 10, no. 1 (2015): 38–64. http://dx.doi.org/10.1111/1749-4877.12095.

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Leigh, Samantha C., Yannis P. Papastamatiou, and Donovan P. German. "Seagrass digestion by a notorious ‘carnivore’." Proceedings of the Royal Society B: Biological Sciences 285, no. 1886 (2018): 20181583. http://dx.doi.org/10.1098/rspb.2018.1583.

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What an animal consumes and what an animal digests and assimilates for energetic demands are not always synonymous. Sharks, uniformly accepted as carnivores, have guts that are presumed to be well suited for a high-protein diet. However, the bonnethead shark ( Sphyrna tiburo ), which is abundant in critical seagrass habitats, has been previously shown to consume copious amounts of seagrass (up to 62.1% of gut content mass), although it is unknown if they can digest and assimilate seagrass nutrients. To determine if bonnetheads digest seagrass nutrients, captive sharks were fed a 13 C-labelled

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Estrada, James A., Aaron N. Rice, Molly E. Lutcavage, and Gregory B. Skomal. "Predicting trophic position in sharks of the north-west Atlantic Ocean using stable isotope analysis." Journal of the Marine Biological Association of the United Kingdom 83, no. 6 (2003): 1347–50. http://dx.doi.org/10.1017/s0025315403008798.

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Trophic positions (TP) were estimated for the blue shark (Prionace glauca), shortfin mako (Isurus oxyrinchus), thresher shark (Alopias vulpinus), and basking shark (Cetorhinus maximus) using stable isotope ratios of carbon (δ13C) and nitrogen (δ15N). The basking shark had the lowest TP (3·1) and δ15N value (10·4‰), whereas the thresher shark had the highest values (4·5, 15·2‰). Mako sharks showed considerable variation in TP and isotopic values, possibly due to foraging from both inshore and offshore waters. Thresher sharks were significantly more enriched in δ15N than blue sharks and mako sha

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Mitchell, Jonathan D., Tracey B. Scott-Holland, and Paul A. Butcher. "Factors Affecting Shark Detection from Drone Patrols in Southeast Queensland, Eastern Australia." Biology 11, no. 11 (2022): 1552. http://dx.doi.org/10.3390/biology11111552.

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Drones enable the monitoring for sharks in real-time, enhancing the safety of ocean users with minimal impact on marine life. Yet, the effectiveness of drones for detecting sharks (especially potentially dangerous sharks; i.e., white shark, tiger shark, bull shark) has not yet been tested at Queensland beaches. To determine effectiveness, it is necessary to understand how environmental and operational factors affect the ability of drones to detect sharks. To assess this, we utilised data from the Queensland SharkSmart drone trial, which operated at five southeast Queensland beaches for 12 mont

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8

Clarke, C. R., J. S. E. Lea, and R. F. G. Ormond. "Changing relative abundance and behaviour of silky and grey reef sharks baited over 12 years on a Red Sea reef." Marine and Freshwater Research 64, no. 10 (2013): 909. http://dx.doi.org/10.1071/mf12144.

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There is a lack of studies on how provisioning may influence shark numbers and behaviour. The effects of long-term provisioning were investigated at a Red Sea reef, where both grey reef shark (Carcharhinus amblyrhynchos) and silky shark (Carcharhinus falciformis) occurred. Initially, grey reef sharks outnumbered silky sharks, but over 6 years, silky shark numbers increased almost 20-fold, whereas grey-reef sightings decreased >90%. Following this, silky-shark sightings also declined considerably (>80%). It is suggested that these declines could relate to local overfishing. Many silky sha

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9

Abedinia, Oveis, Nima Amjady, Nasser Yousefi, and Mohammad Sadegh Aramli. "A Descriptive Study on Mathematical Model of Shark’s Capabilities as a Successful Hunter." Recent Advances in Biology and Medicine 02 (2016): 48. http://dx.doi.org/10.18639/rabm.2016.02.292390.

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In this paper, we have studied the abilities of shark in the sea environment. Sharks are mysterious and misunderstood creatures that have fascinated the people for generations. This trunk will introduce students to the biology and behaviors of sharks. The main purpose of this paper is to discover this animal’s abilities, especially its olfactory bulbs, and the reasons which makes the shark a successful hunter. After studying the characteristics of this animal, we will analyze each of them to answer: “how we can use these capabilities in our life?” Accordingly, we will focus on shark’s swimming

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Setiadi, Tatak, Jauhar Wahyuni, and Iin Susilawati Lantu. "Stakeholder dynamics in Whale Shark Conservation: A social-economic analysis of marine tourism in Botubarani Beach, Gorontalo, Indonesia." IOP Conference Series: Earth and Environmental Science 1461, no. 1 (2025): 012047. https://doi.org/10.1088/1755-1315/1461/1/012047.

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Abstract Indonesia’s marine biodiversity is highlighted by the presence of whale sharks (Rhincodon typus), the largest fish species averaging 9.7 meters in length and 9 tons in weight, which appear in only 4-5 locations nationwide. Botubarani Beach in Gorontalo, Indonesia has recently become one such site, hosting around six whale sharks since 2018. Since 2013, the existence of whale sharks is protected under the Decree of the Minister of Marine Affairs and Fisheries of the Republic of Indonesia. Their appearances in Botubarani Beach creates a new model of marine tourism, which includes activi

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Whitenack, Lisa B., Brady L. Mickley, Julia Saltzman, Stephen M. Kajiura, Catherine C. Macdonald, and David S. Shiffman. "A content analysis of 32 years of Shark Week documentaries." PLOS ONE 17, no. 11 (2022): e0256842. http://dx.doi.org/10.1371/journal.pone.0256842.

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Despite evidence of their importance to marine ecosystems, at least 32% of all chondrichthyan species are estimated or assessed as threatened with extinction. In addition to the logistical difficulties of effectively conserving wide-ranging marine species, shark conservation is believed to have been hindered in the past by public perceptions of sharks as dangerous to humans. Shark Week is a high-profile, international programming event that has potentially enormous influence on public perceptions of sharks, shark research, shark researchers, and shark conservation. However, Shark Week has rece

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Hadinata, Fitra Wira, Yennie Yennie, Mardan Adijaya, et al. "Population dynamics of sorrah sharks (Carcharhinus sorrah) caught in fishery management areas (WPP 711)." Acta Aquatica: Aquatic Sciences Journal 1, no. 1 (2025): 106–12. https://doi.org/10.29103/aa.v1i1.15515.

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Sorrah shark (Carharhinus sorrah) is one of the catch types that is landed at the Nusantara Pemangkat Fishing Port. This research was conducted to determine the dynamics of the sorrah shark population caught in the WPP 711 fishery management area. This research was carried out from August to October 2023 at TPI, precisely at the Nusantara Pemangkat Fishing Port, Pemangkat District, Sambas Regency, West Kalimantan. The method used in this research is a survey. This research used primary and secondary data. The data collected includes the number of catches (kg), total catch (tails), total length

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13

Butcher, Paul A., Kate A. Lee, Craig P. Brand, et al. "Capture Response and Long-Term Fate of White Sharks (Carcharodon carcharias) after Release from SMART Drumlines." Biology 12, no. 10 (2023): 1329. http://dx.doi.org/10.3390/biology12101329.

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Human-shark conflict has been managed through catch-and-kill policies in most parts of the world. More recently, there has been a greater demand for shark bite mitigation measures to improve protection for water users whilst minimizing harm to non-target and target species, particularly White Sharks (Carcharodon carcharias), given their status as a Threatened, Endangered, or Protected (TEP) species. A new non-lethal shark bite mitigation method, known as the Shark-Management-Alert-in-Real-Time (SMART) drumline, alerts responders when an animal takes the bait and thereby provides an opportunity

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14

Neves, Joao, Jean-Christophe Giger, Vasco Alves, and Nuno Soares. "Focusing on Social Behaviors: Improving the Perceived Warmth of Sharks in an Aquarium Setting." Animals 13, no. 15 (2023): 2455. http://dx.doi.org/10.3390/ani13152455.

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Sharks are commonly depicted as intentionally dangerous predators and are considered a threat by the general public, limiting support for and success of global shark conservation. Following the SCM framework, this study aimed at testing the effect of information on the social lives of sharks alone or paired with circumstantial humor on the participants’ perceived warmth of sharks before visiting an aquarium. The present study took place in a naturalistic setting, allowing testing of the variables in a pseudo-real-world environment where results can objectively help in the implementation of str

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Kudadiri, Rina, Nurul Najmi, and Ilham Fajri. "PENDATAAN PENDARATAN IKAN HIU DI PANGKALAN PENDARATAN IKAN (PPI) RIGAIH KABUPATEN ACEH JAYA." Journal of Aceh Aquatic Sciences 6, no. 1 (2022): 11. http://dx.doi.org/10.35308/jaas.v6i1.5418.

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Shark is a cartilaginous fish. Sharks can be found in almost all Indonesian waters, both in territorial waters, ocean waters and the Indonesian Exclusive Economic Zone (EEZ). There are various types of sharks found. It was estimated that more than 300 sharks are found in the waters of Aceh Jaya and most of them have the potential to be exploited. The potential for sharks to land in Aceh Jaya is very high, but information about shark catches is still very minimal, therefore a study was obtained from data collection based on shark catches landed at PPI Rigaih to identify species, determine the l

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16

Williams, H., and AH Schaap. "Preliminary results of a study into the incidental mortality of sharks in Gill-nets in two Tasmanian Shark Nursery Areas." Marine and Freshwater Research 43, no. 1 (1992): 237. http://dx.doi.org/10.1071/mf9920237.

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Since the early 1960s, certain sheltered bays and estuaries around Tasmania have been designated shark nursery areas, where the taking of either the school shark (Galeorhinus galeus) or the gummy shark (Mustelus antarcticus) has been prohibited. Recent assessments of Australian stocks of school and gummy sharks indicate that they are close to collapse, and the management of the fishery has come under review. With respect to shark nursery areas, concern has focused on the potential rate of incidental mortality of sharks caused by recreational gill-net fishing and poaching. In 1990, a study was

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17

Handayani, Ni Made Putri, Pande Gde Sasmita Julyantoro, and I. Ketut Wija Negara. "Alur Perdagangan Hiu sebagai Komoditas Ikan Hias dari Provinsi Bali." Journal of Marine and Aquatic Sciences 4, no. 1 (2017): 58. http://dx.doi.org/10.24843/jmas.2018.v4.i01.58-66.

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This study objectives were to investigate the track of shark trade from Bali Province, the exports volume of shark trade during 2015-2016, the length of sharks; species exported in the ETP category; and the effectiveness of shark trade license by BPSPL Denpasar based on EAFM analysis. This study used exploration method with questionnaires, interviews and secondary data from BPSPL Denpasar. The results showed that the track of shark trade started from when the shark is caught by the fishermen which purchased by exporter companies, then they had to get shipment recommendation letter from BPSPL D

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Heithaus, Michael R., Derek Burkholder, Robert E. Hueter, Linda I. Heithaus, Harold L. Pratt, Jr., and Jeffrey C. Carrier. "Spatial and temporal variation in shark communities of the lower Florida Keys and evidence for historical population declines." Canadian Journal of Fisheries and Aquatic Sciences 64, no. 10 (2007): 1302–13. http://dx.doi.org/10.1139/f07-098.

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Sharks are top predators in many marine ecosystems. Despite recent concerns over declines in shark populations, studies of shark communities in coastal habitats are limited. We used drumlines and longlines to determine shark community composition and habitat affinities in the Florida Keys, USA. Community composition varied among habitats. Catch rates of smaller sharks were highest in protected shallow waters, while large sharks were more abundant in deep channels. Overall probabilities of catching large sharks on drumlines did not vary with water temperature, while catches of small sharks on l

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Ferdiansyah, Doni Doni, Mohammad Taufiq Hidayat, and Abdul Qadir Jailani. "Fishermen’s Perception of Shark Conservation Sustainable and Its Effect on Shark Catching : A Case Study on Madura Island." Journal of Aquaculture Development and Environment 2, no. 1 (2019): 38–44. http://dx.doi.org/10.31002/jade.v2i1.1202.

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The high demand of shark products, particularly fins, have influenced the increase in the exploitation and trade of sharks, included small scale fisheries. The condition can increase the vulnerability of sharks because of their biological cycle and as a top predator and economically important fish. This paper aims to identify the conditions of exploitation and management of sharks in Sumenep Regency. The method used in this research is the field observation, in-depth interview and review of policies. Based on the existing results indicate that over exploitation has occurred in Sumenep, where f

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Lester, Emily, Conrad Speed, Dani Rob, Peter Barnes, Kelly Waples, and Holly Raudino. "Using an Electronic Monitoring System and Photo Identification to Understand Effects of Tourism Encounters on Whale Sharks in Ningaloo Marine Park." Tourism in Marine Environments 14, no. 3 (2019): 121–31. http://dx.doi.org/10.3727/154427319x15634581669992.

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In-water shark-based tourism is growing worldwide and whale sharks (Rhincodon typus) are one of the most popular targets of this industry. It is important to monitor tourism industries to minimize any potential impacts on target species. At Ningaloo, Western Australia, Electronic Monitoring Systems (EMS) have been installed on licensed tour vessels to collect information on encounters between snorkelers and whale sharks. This study combined data from the EMS with whale shark identification photographs, to assess the impact of in-water tourism on the encounter duration for individual sharks. Du

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Panoch, Rainer, and Elissa L. Pearson. "Humans and Sharks." Society & Animals 25, no. 1 (2017): 57–76. http://dx.doi.org/10.1163/15685306-12341441.

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There is worldwide concern regarding the conservation status of sharks. Public perceptions of sharks, often based on inaccurate negative stereotypes transmitted through the media and popular culture, appear to be limiting support for their conservation. Yet, there is a paucity of research exploring the knowledge and attitudes of the general public regarding sharks and their conservation, as well as approaches to improve these factors and encourage greater conservation support. The primary aim of this review is to explore the role that psychology, education, and the media might play in engender

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Clua, E., N. Buray, P. Legendre, J. Mourier, and S. Planes. "Business partner or simple catch? The economic value of the sicklefin lemon shark in French Polynesia." Marine and Freshwater Research 62, no. 6 (2011): 764. http://dx.doi.org/10.1071/mf10163.

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Most arguments invoked so far by the scientific community in favour of shark conservation rely on the ecological importance of sharks, and have little impact on management policies. During a 57-month study, we were able to individually recognise 39 sicklefin lemon sharks that support a shark-feeding ecotourism activity in Moorea Island, French Polynesia. We calculated the direct global revenue generated by the provisioning site, based on the expenses of local and international divers. The total yearly revenue was around USD5.4 million and the 13 sharks most often observed at the site had an av

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Kindong, Richard, Ousmane Sarr, Feng Wu, and Siquan Tian. "Length-Based Assessment Methods for the Conservation of a Pelagic Shark, Carcharhinus falciformis from the Tropical Pacific Ocean." Fishes 7, no. 4 (2022): 184. http://dx.doi.org/10.3390/fishes7040184.

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The silky shark, Carcharhinus falciformis is one of the most heavily exploited sharks, being the main by-catch species in both tuna longline and purse-seine fisheries in tropical waters worldwide. Despite this severe exploitation, little is known about the species’ life history and population status. Silky sharks, like many other sharks, exhibit slow growth and low fecundity, indicating the urgency of developing assessment studies to aid in the implementation of conservation plans for their stocks. Because information on the catch and effort of this species is scarce, some length-based data-li

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Campana, Steven E., Linda Marks, Warren Joyce, and Nancy E. Kohler. "Effects of recreational and commercial fishing on blue sharks (Prionace glauca) in Atlantic Canada, with inferences on the North Atlantic population." Canadian Journal of Fisheries and Aquatic Sciences 63, no. 3 (2006): 670–82. http://dx.doi.org/10.1139/f05-251.

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The nominal catch of blue sharks (Prionace glauca) reported for the Canadian Atlantic grossly underestimates the annual catch mortality of about 1000 tonnes (t), making blue sharks the most frequently caught large shark in Canadian waters. Although blue sharks accounted for 99% of all sharks landed at recreational shark fishing tournaments, tournament catches accounted for only 3% of total fishing mortality. Standardized catch rate indices suggested a decline in blue shark abundance of about 5%6%·year1 since 1995. An increased mortality rate in recent years was suggested by a decline in the

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Garzon, Francesco, Rachel T. Graham, Ivy Baremore, et al. "Nation-wide assessment of the distribution and population size of the data-deficient nurse shark (Ginglymostoma cirratum)." PLOS ONE 16, no. 8 (2021): e0256532. http://dx.doi.org/10.1371/journal.pone.0256532.

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The study presents the first national assessment of a nurse shark (Ginglymostoma cirratum) population, conducted using a combination of transect surveys and baited remote underwater videos (BRUVs). Density of nurse sharks in Belize was found to be higher in reefs than in lagoons, and in the atolls furthest away from the mainland and human settlements. Only large and old protected areas were found to have a positive impact on nurse shark abundance. Absolute abundance of nurse sharks was estimated using distance sampling analysis, giving a total nurse shark population in the range of 3,858 to 14

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Queiroz, Nuno, Nicolas E. Humphries, Gonzalo Mucientes, et al. "Ocean-wide tracking of pelagic sharks reveals extent of overlap with longline fishing hotspots." Proceedings of the National Academy of Sciences 113, no. 6 (2016): 1582–87. http://dx.doi.org/10.1073/pnas.1510090113.

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Overfishing is arguably the greatest ecological threat facing the oceans, yet catches of many highly migratory fishes including oceanic sharks remain largely unregulated with poor monitoring and data reporting. Oceanic shark conservation is hampered by basic knowledge gaps about where sharks aggregate across population ranges and precisely where they overlap with fishers. Using satellite tracking data from six shark species across the North Atlantic, we show that pelagic sharks occupy predictable habitat hotspots of high space use. Movement modeling showed sharks preferred habitats characteriz

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Nurastri, Vista Dhea, Slamet Budi Prayitno, and Suradi Wijaya Saputra. "Biological Characteristics of Bigeye Thresher Shark (Alopias superciliosus) Landed in Cilacap Ocean Fishing Port, Cilacap Regency, Central Java, Indonesia." Asian Journal of Current Research 9, no. 4 (2024): 197–206. https://doi.org/10.56557/ajocr/2024/v9i49017.

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Shark is the top predator of the marine food chain which has a unique biological condition, namely a long life cycle and is prone to population decline in nature if its utilization is not carried out wisely. This study aims to analyze the biological conditions of bigeye thresher shark (Alopias superciliosus) which includes sex ratio, length at first capture (Lc), length-weight relationship, condition factor, sexual maturity and length at first maturity (Lm) in male sharks during March-June 2023 landed at Cilacap Ocean Fishing Port. The results of the analysis of the sex ratio of female and mal

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Haskell, Peter J., Andrew McGowan, Anna Westling, et al. "Monitoring the effects of tourism on whale shark Rhincodon typus behaviour in Mozambique." Oryx 49, no. 3 (2014): 492–99. http://dx.doi.org/10.1017/s0030605313001257.

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AbstractThe whale shark Rhincodon typus is a popular focal species in the marine tourism industry. We analysed 689 encounters with at least 142 individual sharks during 2008–2010 to assess their behaviour in the presence of swimmers at Tofo Beach, Mozambique. Sharks varied in size (estimated 3.0–9.5 m total length) and the majority (74%) were males. The sharks displayed avoidance behaviours during 64.7% of encounters. Encounter duration decreased significantly, from 12 minutes 37 s with undisturbed sharks to 8 minutes 25 s when sharks expressed avoidance behaviours, indicating that interaction

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Mardhatillah, Inda, Am Azbas Taurusman, Muhammad Fedi Alfiadi Sondita, Ilham Fajri, and Muhammad Aris. "An ecosystem approach to manage pelagic thresher shark (Alopias pelagicus) based in Kutaraja Ocean Fishing Port, Aceh." Depik 11, no. 2 (2022): 192–201. http://dx.doi.org/10.13170/depik.11.2.25479.

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Sharks is the dominant bycatch of purse seine and bottom longline vessels that landed in Kutaraja ocean fishing port, particularly pelagic thresher shark species (Alopias pelagicus). The management of shark fisheries in Aceh water is not well implemented. According to the IUCN red list, the pelagic thresher shark has been classified as an endangered species. The capture and trade of pelagic thresher sharks are regulated by CITES (Appendix II). So that Indonesia has to comply with the procedures of CITES due to it has been adopted through the Decree of Minister of Marine Affairs and Fisheries o

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Coad, Brian W., and Nicholas Coad. "Sharks, Sharks, Sharks, by Tina Anton, and Sharks and Whales, by Burton Albert [Review]." Canadian field-naturalist 106, no. 1 (1992): 164. http://dx.doi.org/10.5962/p.356915.

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Mansyah, Muh Sutri, La Ode Muhammad Karim, Revalina Nur Aliyah Priadi, La Ode Bunga Ali, and Mashendara Mashendara. "Enhancing fish traders' awareness of shark conservation laws to support ecosystem sustainability." BIO Web of Conferences 180 (2025): 02002. https://doi.org/10.1051/bioconf/202518002002.

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This research aims to enhance the understanding of shark fish traders in maintaining ecosystem sustainability at Wameo Market, Baubau City. The market area sells various types of fish, one of which is sharks. However, sharks are prohibited from being traded. Despite this, sales continue to take place. The price per shark is Rp 20,000, even though sharks are endangered, which threatens the sustainability of the ecosystem. It is crucial for fish traders to understand this issue, and for the Baubau City government to take preventive measures or, if necessary, enforcement actions against traders w

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Amri Komarudin, Nurul, Fahrunnisa Fahrunnisa, and Yuni Yolanda. "Community-Based Whale Sharks Conservation to Strengthen Ma-rine Tourism Management in Sumbawa." International Journal of Geotourism Science and Development 2, no. 2 (2022): 25–31. http://dx.doi.org/10.58856/ijgsd.v2i2.20.

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Sumbawa is famous for its marine tourism, apart from the beauty of its beaches, Sumbawa also has marine fauna that attracts the attention of tourists, namely whale sharks. It is recorded that there are around 99 species of Whale Sharks located in Saleh Bay, Sumbawa. Thus, making Saleh Bay the location with the second largest whale shark population in Indonesia and UNESCO designated Saleh Bay as part of the SAMOTA biosphere reserve. Currently, whale sharks have protected fauna according to the decree of the Minister of Marine Affairs and Fisheries No. 18 of 2013. This is due to the pollution of

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Cardeñosa, Diego, Kerstin B. J. Glaus, and Juerg M. Brunnschweiler. "Occurrence of juvenile bull sharks (Carcharhinus leucas) in the Navua River in Fiji." Marine and Freshwater Research 68, no. 3 (2017): 592. http://dx.doi.org/10.1071/mf16005.

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Effective species conservation requires the protection of all stages of its life-cycle. The Shark Reef Marine Reserve (SRMR) in Fiji is a marine protected area where large numbers of adult bull sharks (Carcharhinus leucas) congregate due to food provisioning. At the end of a calendar year bull sharks leave the area for reproductive activity, but parturition sites are still unknown. Between February 2014 and January 2015, we interviewed local fishermen and conducted a fishing survey, so as to assess presence and abundance of bull sharks in the Navua River near the SRMR. In total 84% of fisherme

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Cajiga, Rosa María. "Shark Finning Legislation and Shark Welfare. An Analysis of the Kristin Jacobs Ocean Conservation Act." Derecho Animal. Forum of Animal Law Studies 12, no. 3 (2021): 78–110. http://dx.doi.org/10.5565/rev/da.566.

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Thousands of sharks are cruelly killed worldwide every day due to the lucrative shark finning trade. This practice is negatively impacting marine life, as sharks are the greatest ocean predators and maintain the delicate balance of the marine ecosystem. Shark finning consists of removing the fins and discarding the rest. The sharks are alive during the process, and when tossed back into the water without fins they cannot swim, thus sinking to the depths where they asphyxiate and / or are devoured by other fish. The fins are primarily consumed in China, Hong Kong, Taiwan, and Asian communities

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Legaspi, Christine, Joni Miranda, Jessica Labaja, Sally Snow, Alessandro Ponzo, and Gonzalo Araujo. "In-water observations highlight the effects of provisioning on whale shark behaviour at the world's largest whale shark tourism destination." Royal Society Open Science 7, no. 12 (2020): 200392. http://dx.doi.org/10.1098/rsos.200392.

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The whale shark is the world's largest fish that forms predictable aggregations across its range, many of which support tourism industries. The largest non-captive provisioned whale shark destination globally is at Oslob, Philippines, where more than 500 000 tourists visit yearly. There, the sharks are provisioned daily, year-round, allowing the human–shark interaction in nearshore waters. We used in-water behavioural observations of whale sharks between 2015 and 2017 to understand the relationship between external stimuli and shark behaviour, whether frequency of visits at the site can act as

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Moutopoulos, Dimitrios K., Evridiki Lazari, George Katselis, and Ioannis Giovos. "From Extermination to Conservation: Historical Records of Shark Presence during the Early and Development Phase of the Greek Fishery." Animals 12, no. 24 (2022): 3575. http://dx.doi.org/10.3390/ani12243575.

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The lack of historical data on shark presence, distribution, and status in the Eastern Mediterranean undermines efforts to manage and protect their populations. An exhaustive review of anecdotal references related to shark presence during the early and development phase of Greek fisheries (1883–1983) was conducted. In the early-20th century (1912), the first sighting of the presence of a dead shark was reported in the Ionian Sea. Later on, the presence of sharks gradually increased up to 1969, with most records being more frequent for the Aegean Sea, whereas the number of sharks being sighted

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Maruanaya, Y., and Sumaryono. "Occurrence of whale sharks (Rhincodon typus) in the Kwatisore Waters within the Cenderawasih Bay National Park as a basis for carrying capacity estimations and assessments for ecotourism suitability." IOP Conference Series: Earth and Environmental Science 1224, no. 1 (2023): 012018. http://dx.doi.org/10.1088/1755-1315/1224/1/012018.

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Abstract Kwatisore waters in the Cenderawasih Bay National Park area is one of the whale sharks’ habitats in Indonesia. As shark sightings seem to occur daily there is the opportunity for ecotourism development in the area. This study aims to quantify the occurrence of whale sharks at Kwatisore, and estimate the carrying capacity of the area, together with its suitability for ecotourism based on whale shark aggregations. Primary data collection on the appearance of whale sharks was carried out every day through a census technique on 7 designated areas (Apr to Aug, 2022). Every whale shark that

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Maruanaya, Y., and Sumaryono. "Occurrence of whale sharks (Rhincodon typus) in the Kwatisore Waters within the Cenderawasih Bay National Park as a basis for carrying capacity estimations and assessments for ecotourism suitability." IOP Conference Series: Earth and Environmental Science 1207, no. 1 (2023): 012002. http://dx.doi.org/10.1088/1755-1315/1207/1/012002.

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Abstract Kwatisore waters in the Cenderawasih Bay National Park area is one of the whale sharks’ habitats in Indonesia. As shark sightings seem to occur daily there is the opportunity for ecotourism development in the area. This study aims to quantify the occurrence of whale sharks at Kwatisore, and estimate the carrying capacity of the area, together with its suitability for ecotourism based on whale shark aggregations. Primary data collection on the appearance of whale sharks was carried out every day through a census technique on 7 designated areas (Apr to Aug, 2022). Every whale shark that

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Hussey, Nigel E., Noémie Stroh, Rebecca Klaus, Tarik Chekchak, and Steven T. Kessel. "SCUBA diver observations and placard tags to monitor grey reef sharks, Carcharhinus amblyrhynchos, at Sha'ab Rumi, The Sudan: assessment and future directions." Journal of the Marine Biological Association of the United Kingdom 93, no. 2 (2011): 299–308. http://dx.doi.org/10.1017/s0025315411001160.

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Establishing baseline data on the abundance of threatened shark species is critical for monitoring site- and region-specific population tends over time. This is of particular importance for monitoring sharks at remote locations or in regions where there are no reliable data on shark numbers, fishing effort and current population status. Through establishing a standardized recreational SCUBA diver observation programme, this study examined the number, size and sex-composition of grey reef sharks, Carcharhinus amblyrhynchos, on a remote coral reef system off the Red Sea coast of Sudan. In additi

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Trystram, Clément, Karyne M. Rogers, Marc Soria, and Sébastien Jaquemet. "Feeding patterns of two sympatric shark predators in coastal ecosystems of an oceanic island." Canadian Journal of Fisheries and Aquatic Sciences 74, no. 2 (2017): 216–27. http://dx.doi.org/10.1139/cjfas-2016-0105.

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Stomach contents and stable carbon and nitrogen isotope analyses (δ13C and δ15N) were used to investigate the trophic ecology of two apex predators, tiger sharks (Galeocerdo cuvier) and bull sharks (Carcharhinus leucas), from Reunion Island to describe their dietary habits at both the population and individual levels. In this oceanic island, the tiger and bull sharks were more piscivorous and teutophagous than noted in previous research from other localities. The δ13C values suggested that bull sharks depended on more neritic organic matter sources than tiger sharks, confirming a coastal habit

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Nijman, Vincent. "Illegal Trade in Protected Sharks: The Case of Artisanal Whale Shark Meat Fisheries in Java, Indonesia." Animals 13, no. 16 (2023): 2656. http://dx.doi.org/10.3390/ani13162656.

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Illegal, unreported, and unregulated fishing, including that of sharks, poses a significant threat to marine ecosystems and individual species. I use data from the media, tourists, and artisan fishermen to gain insight into the trade in the world’s largest fish, the whale shark (Rhincodon typus). I focus on the Indonesian island of Java where, along its south coast, whale sharks are landed and butchered on the beach in view of hundreds of people and local media. Whale sharks are typically caught in fishing nets and dragged alongside boats to the shallows, where they are butchered. The meat and

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Yasir, Moh, Retno Hartati, Elis Indrayanti, Fahri Amar, and Ariyo Imanuel Tarigan. "Seasonal Constellation of Juvenile Whale Sharks in Gorontalo Bay Coastal Park." ILMU KELAUTAN: Indonesian Journal of Marine Sciences 29, no. 2 (2024): 241–53. http://dx.doi.org/10.14710/ik.ijms.29.2.241-253.

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The whale shark (Rhincodon typus Smith, 1828) is the largest extant fish species in the world, and it is endangered, with population numbers declining in the last three decades. The appearance of whale sharks in the Botubarani Waters has attracted a lot of attention. Therefore, this study aimed to determine the whale shark's appearance, their habitat constellation pattern, and its oceanographic conditions. This research was conducted during the 2019-2022 period. The Photographic Identification (Photo-ID) method is used to observe and determine whale shark individual's number and pattern of pre

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BikramJit, Roy, Nripendra Kumar Singha, Hasan Ali, Gaziur Rhaman, and Fukrul Alam. "SHARK FISHERIES EXPLOITATION, TRADE, CONSERVATION AND MANAGEMENTIN THE BAY OF BENGAL OF BANGLADESH REGION." International Journal of Research -GRANTHAALAYAH 2, no. 2 (2014): 69–83. http://dx.doi.org/10.29121/granthaalayah.v2.i2.2014.3068.

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The study was conducted during July, 2003 to June, 2013 about landing volumes of shark fishery (sharks and rays) in artisanal and industrial fishing sector only in group- wise not in species wise. In these periods, in artisanal fisheries gill nets (shark nets), set bag nets, long lines and trammel nets exploiting data were analyzed. But from 2012-13 periods in industrial fisheries harvesting data of sharks and rays by trawl fishing were started to record keeping in group wise. During 2012-13 total sharks and rays landing volume contributes only 0.85% (5017 MT) of total the marine fish producti

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Roy, Bikram Jit, Kumar Singha Nripendra, Ali S.M.Hasan, Gaziur Rhaman Md., and Fukrul Alam Md. "SHARK FISHERIES EXPLOITATION, TRADE, CONSERVATION AND MANAGEMENT IN THE BAY OF BENGAL OF BANGLADESH REGION." International Journal of Research - GRANTHAALAYAH 2, no. 2 (2017): 69–83. https://doi.org/10.5281/zenodo.884123.

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The study was conducted during July, 2003 to June, 2013 about landing volumes of shark fishery (sharks and rays) in artisanal and industrial fishing sector only in group- wise not in species wise. In these periods, in artisanal fisheries gill nets (shark nets), set bag nets, long lines and trammel nets exploiting data were analyzed. But from 2012-13 periods in industrial fisheries harvesting data of sharks and rays by trawl fishing were started to record keeping in group wise. During 2012-13 total sharks and rays landing volume contributes only 0.85% (5017 MT) of total the marine fish producti

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Huynh, Hoang Huy, Chun-Yi Hung, and Wen-Pei Tsai. "Demographic Analysis of Shortfin Mako Shark (Isurus oxyrinchus) in the South Pacific Ocean." Animals 12, no. 22 (2022): 3229. http://dx.doi.org/10.3390/ani12223229.

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The shortfin mako shark (Isurus oxyrinchus) demonstrates low productivity and is thus relatively sensitive to fishing. Natural mortality (M) and fishing mortality (F) data are critical to determine their population dynamics. However, catch and fishing effort data are unavailable for this species in the South Pacific Ocean, making stock assessments difficult. Demographic quantitative methods aid in analyzing species with limited data availability. We used a two-sex stage-structured matrix population model to examine the demographic stock status of mako sharks. However, data-limited models to de

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Talwar, Brendan S., Edward J. Brooks, Debra L. Abercrombie, et al. "Insights into the Relative Abundance, Life History, and Ecology of Oceanic Sharks in the Eastern Bahamas." Sustainability 16, no. 1 (2023): 200. http://dx.doi.org/10.3390/su16010200.

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Fisheries-independent data on the diversity, relative abundance, and demographic structure of poorly studied, threatened oceanic sharks are absent from much of the western North Atlantic Ocean, where multiple oceanic shark species have experienced significant population declines. Resource-limited management approaches require the identification of critical habitats or aggregation sites worthy of protection and enforcement. Data were collected on oceanic sharks using pelagic longline surveys, targeted baiting, and opportunistic encounters in oligotrophic open-ocean habitats of north-eastern Exu

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Zulurrahmi, Nur, Ilham Fajri, Ratna Mutia Aprilla, Herman Herman, Rada Febriyanti, and Riska Diajeng Putri. "Assessment of shark catches landed at PPI Ujung Serangga, Southwest Aceh." Depik 14, no. 2 (2025): 194–201. https://doi.org/10.13170/depik.14.2.46214.

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This study aimed to assess shark catches at PPI Ujung Serangga, Southwest Aceh, focusing on species composition, size and conservation status. Data were collected through field surveys and direct measurements of sharks landed by fishers. Results showed that bottom longlines were the most widely used fishing gear and produced the highest shark catches. A total of 643 individual sharks from 16 species were identified, with the family Carcharhinidae dominating the catch. Most of the sharks caught were below gonad length (Lm), indicating the potential for juvenile shark fishing. The conservation s

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Alaudin, Alaudin, Jaliadi Jaliadi, and Burhanis Burhanis. "SEBARAN UKURAN DAN PERTUMBUHAN HIU MARTIL (BY CATCH) YANG DIDARATKAN DI PANGKALAN PENDARATAN IKAN (PPI) UJONG BAROH MEULABOH." JURNAL PERIKANAN TROPIS 8, no. 1 (2021): 65. http://dx.doi.org/10.35308/jpt.v8i1.2595.

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Hammerhead shark is a type of predator shark belongs to the family of Sphyrnidae. This shark is so aggressive in hunting prey such as fish, squid, and shrimp. The hammerhead shark in Indonesia is included in Appendix II of CITES and has been a special concern in the field of capture fisheries. The aim of the study was to see the size spread, the number of catches, the first size caught, the age growth and the genital ratio of the hammerhead sharks caught with the base fish net. The study was conducted from October to December 2019. The shark measurement was performed once in 2 weeks. Sharks ca

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Smoothey, Amy F., Yuri Niella, Craig Brand, Victor M. Peddemors, and Paul A. Butcher. "Bull Shark (Carcharhinus leucas) Occurrence along Beaches of South-Eastern Australia: Understanding Where, When and Why." Biology 12, no. 9 (2023): 1189. http://dx.doi.org/10.3390/biology12091189.

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Unprovoked shark bites have increased over the last three decades, yet they are still relatively rare. Bull sharks are globally distributed throughout rivers, estuaries, nearshore areas and continental shelf waters, and are capable of making long distance movements between tropical and temperate regions. As this species is implicated in shark bites throughout their range, knowledge of the environmental drivers of bull shark movements are important for better predicting the likelihood of their occurrence at ocean beaches and potentially assist in reducing shark bites. Using the largest dataset

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&NA;. "Why sharks and sharps can cause a stir." Oncology Times 4, no. 7 (2007): 3. http://dx.doi.org/10.1097/01434893-200707000-00001.

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