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RESEARCH ARTICLE (Open Access)
Contents Vol 74(16)

Search for the vulnerable giants: the presence of giant guitarfish and wedgefish in the Karimunjawa National Park and adjacent waters

Faqih Akbar Alghozali https://orcid.org/0000-0003-4835-1486 A , Muhammad Wiralaga Dwi Gustianto https://orcid.org/0000-0002-9485-4183 A , Ashma Hanifah https://orcid.org/0009-0009-8964-0381 A , Maula Nadia https://orcid.org/0009-0007-5854-5977 A , Widyastuti B , Nauvan Prabhu https://orcid.org/0009-0004-2696-9423 C , Lufni Fauzil Adhim D , Khansa Alifa Nurhaliza E , Hollie Booth https://orcid.org/0000-0003-4339-820X F G , Muhammad Ichsan https://orcid.org/0000-0002-8156-9666 H I * , Andhika Prasetyo https://orcid.org/0000-0002-7412-8432 J and Nesha Ichida K
+ Author Affiliations
- Author Affiliations

A Yayasan Hiu Pari Lestari (Elasmobranch Project Indonesia), Banten, Indonesia. Email: faqihbig@hotmail.com; agawiralaga@gmail.com; hanifah.ashma20@gmail.com; mnrachmanto@gmail.com

B Karimunjawa National Park Management Office, Central Java, Indonesia. Email: widyastuti.kds@gmail.com

C Department of Oceanography, Faculty of Fishery and Marine Science, Diponegoro University, Central Java, Indonesia. Email: nauvanp@gmail.com

D Department of Fishery, Faculty of Fishery and Marine Science, Padjadjaran University of Pangandaran, West Java, Indonesia. Email: lufni09@gmail.com

E Department of Marine Science, Faculty of Fishery and Marine Science, Padjadjaran University, West Java, Indonesia. Email: khansaalifa21@gmail.com

F The Interdisciplinary Centre for Conservation Science, Department of Zoology, University of Oxford, Oxford, UK. Email: hollie.booth@balliol.ox.ac.uk

G The Biodiversity Consultancy, Cambridge, UK.

H Yayasan Impak Laut Biru Indonesia (Impact Blue Sea Foundation), West Java, Indonesia.

I University of Sunshine Coast, Sippy Downs, Qld, Australia.

J Research Centre for Conservation of Marine and Inland Water Resources, National Research and Innovation Agency, Jakarta, Indonesia. Email: andh009@brin.go.id

K Thrive Conservation, Bali, Indonesia. Email: nesha@thriveconservation.org

* Correspondence to: ichsan.shark@gmail.com

Handling Editor: Haseeb Randhawa

Marine and Freshwater Research 74(16) 1420-1430 https://doi.org/10.1071/MF23101
Submitted: 26 May 2023  Accepted: 11 October 2023  Published: 1 November 2023

© 2023 The Author(s) (or their employer(s)). Published by CSIRO Publishing. This is an open access article distributed under the Creative Commons Attribution 4.0 International License (CC BY)

Abstract

Context

Giant guitarfish (Family: Glaucostegidae) and wedgefish (Family: Rhinidae) (Critically Endangered, IUCN Red List and CITES Appendix II) are highly exploited throughout their distribution because of their highly valued fins in the international market. Both are commonly caught as bycatch or secondary valuable catch in the Java Sea, including in Karimunjawa National Park, Central Java, Indonesia.

Aims

Assess the presence and relative abundance of giant guitarfish and wedgefish species in Karimunjawa National Park and adjacent waters.

Methods

Data were collected using baited remote underwater video (BRUV) surveys across 40 sites, covering multiple zonation areas and depth ranges. All species were identified to the species level and their relative abundance was tested with one-way PERMANOVA based on sites, zonation areas and depths.

Key results

Two target species, Glaucostegus typus and Rhynchobatus australiae, were present in the study area with a maximum number of 3 and 6 and relative abundance of 0.0048 and 0.0096 respectively, over 477 BRUVs and 623.9 h of videos. Their presence during the study was not affected by sites, zonations or depth.

Implications

The presence and relative abundance of both G. typus and R. australiae were low, which may be a result of decades of overfishing, and have provided the first information to the urgency of managing the species in the areas.

Keywords: BRUV, elasmobranch, giant guitarfish, Indonesia, Karimunjawa, presence, relative abundance, wedgefish.

References

Anderson AB, Fiuza TMJ, Araujo GS, Canterle AM, Canto LMC, Freitas RHA, Gadig OBF, Floeter SR (2021) A safe haven for potential reproductive aggregations of the critically endangered Brazilian guitarfish (Pseudobatos horkelii). Journal of Fish Biology 99(6), 2030-2034.
| Crossref | Google Scholar | PubMed |

Beer AJE (2015) Diversity and abundance of sharks in no-take and fished sites in the marine protected area network of Raja Ampat, West Papua, Indonesia, using Baited Remote Underwater Video (BRUVs). MSc thesis, Royal Roads University, Victoria, BC, Canada.

Bennett R, van Beuningen D, Markovina M, Razafindrakoto C, Sitoe J, Sidat N, Fernando S, da Silva I, Costa H, Bernard A, Dames V, Daly R, Mann B, Jordaan G, van der Merwe AB, Price A, Asbrury T (2021) Western Indian Ocean wedgefishes (Rhinidae): ecological knowledge, fisheries and management. In ‘Report on the American Elasmobranch Society Global Wedgefish & Guitarfish Symposium 2021’. (Eds DA Ebert, P Carlson, RM Aitchison, BL Huerta-Beltran, PM Kyne) Abstract, p. 9. (Moss Landing Marine Laboratories, San Jose State University: San Jose, CA, USA)

Bond ME, Babcock EA, Pikitch EK, Abercrombie DL, Lamb NF, Chapman DD (2012) Reef Sharks exhibit site-fidelity and higher relative abundance in marine reserves on the mesoamerican barrier reef. PLoS ONE 7(3), e32983.
| Crossref | Google Scholar | PubMed |

Booth H, Squires D, Milner-Gulland EJ (2019) The neglected complexities of shark fisheries, and priorities for holistic risk-based management. Ocean & Coastal Management 182, 104994.
| Crossref | Google Scholar |

Booth H, Ichsan M, Hermansyah RF, Rohmah LN, Naira KB, Adrianto L, Milner-Gulland EJ (2023a) A socio-psychological approach for understanding and managing bycatch in small-scale fisheries. People and Nature 5(3), 968-980.
| Crossref | Google Scholar |

Booth H, Ramdlan MS, Hafizh A, Wongsopatty K, Mourato S, Pienkowski T, Adrinato L, Milner-Gulland EJ (2023b) Designing locally appropriate conservation incentives for small-scale fishers. Biological Conservation 277, 109821.
| Crossref | Google Scholar |

Cappo M, De’ath G, Speare P (2007a) Inter-reef vertebrate communities of the Great Barrier Reef Marine Park determined by baited remote underwater video stations. Marine Ecology Progress Series 350, 209-221.
| Crossref | Google Scholar |

Cappo M, Harvey E, Shortis M (2007b) Counting and measuring fish with baited video techniques. An overview. In ‘Cutting-Edge Technologies in Fish and Fisheries Science, Australian Society for Fish Biology Workshop Proceedings’, 28–29 August 2006, Hobart, Tas., Australia. (Eds JM Lyle, DM Furlani, CD Buxton) Vol. 1, pp. 101–114. (Australian Society for Fish Biology: Hobart, Tas., Australia)

Cartamil D, Wegner NC, Kacev D, Ben-aderet N, Kohin S, Graham JB (2010) Movement patterns and nursery habitat of juvenile thresher sharks Alopias vulpinus in the Southern California Bight. Marine Ecology Progress Series 404, 249-258.
| Crossref | Google Scholar |

Chaikin S, Belmaker J, Barash A (2020) Coastal breeding aggregations of threatened stingrays and guitarfish in the Levant. Aquatic Conservation: Marine and Freshwater Ecosystems 30(6), 1160-1171.
| Crossref | Google Scholar |

Collette B, Curtis M, Williams JT, Smith-Vaniz WF, Pina Amargos F (2015a) Live sharksucker Echeneis naucrates. In ‘The IUCN Red List of Threatened Species 2015’. e.T190393A115317934. (International Union for Conservation of Nature and Natural Resources) Available at https://www.iucnredlist.org/species/190393/115317934 [Erratum version published in 2017]

Collette B, Curtis M, Williams JT, Smith-Vaniz WF, Pina Amargos F (2015b) Cobia Rachycentron canadum. In ‘The IUCN Red List of Threatened Species 2015’. e.T190190A70036823. (International Union for Conservation of Nature and Natural Resources) Available at https://www.iucnredlist.org/species/190190/70036823

Corbett J (2009) Good practices in participatory mapping: a review prepared for the International Fund for Agricultural Development (IFAD). (IFAD) Available at http://www.ifad.org/pub/map/PM_web.pdf

Crook KA (2020) Assessing the functional roles of rays in coastal sandflats. PhD Thesis, James Cook University, Qld, Australia. doi:10.25903/rq54%2D5813

Curtis M, Williams JT, Collette B, Smith-Vaniz WF, Pina Amargos F (2015) Common remora Remora remora. In ‘The IUCN Red List of Threatened Species 2015’. e.T198651A115343508. (International Union for Conservation of Nature and Natural Resources) Available at https://www.iucnredlist.org/species/198651/115343508 [Erratum version published in 2017]

Dent F, Clarke S (2015) State of the global market for shark products. FAO Fisheries and Aquaculture Technical Paper 590. (Food and Agriculture Organization of the United Nations: Rome, Italy) Available at http://www.fao.org/3/a-i4795e.pdf

Directorate General of Capture Fisheries (2015) Capture Fisheries Statistics of Indonesia. DGCF, Jakarta, Indonesia

Directorate General of Capture Fisheries (2017) Capture fisheries statistics of Indonesia by province. Vol. 17, Number 1. Ministry of Marine Affairs and Fisheries, Jakarta, Indonesia.

Direktorat Jenderal Perlindungan Hutan dan Konservasi Alam (2012) Keputusan Direktur Jenderal Perlindungan Hutan dan Konservasi Alam. Tentang zonasi taman Nasional Karimunjawa, Direktur Jenderal Perlindungan Hutan dan Konservasi Alam. Nomor: SK.28/IV-SET/2012. (Kementerian Kehutanan) Available at https://tnkarimunjawa.id/assets/filepublikasi/3/dokpublik_1501472150.pdf [In Indonesian]

Dove ADM, Pierce SJ (2022) ‘Whale sharks: biology, ecology, and conservation.’ (CRC Press: Boca Raton, FL, USA)

Du Preez HH, Mclachlan A, Marais JFK (1988) Oxygen consumption of two nearshore marine elasmobranchs, Rhinobatos annulatus (Muller & Henle, 1841) and Myliobatus aquila (Linnaeus, 1758). Comparative Biochemistry and Physiology – A. Physiology 89(2), 283-294.
| Crossref | Google Scholar |

Dulvy NK, Simpfendorfer CA, Davidson LNK, Fordham SV, Bräutigam A, Sant G, Welch DJ (2017) Challenges and priorities in shark and ray conservation. Current Biology 27(11), R565-R572.
| Crossref | Google Scholar | PubMed |

Dulvy NK, Pacoureau N, Rigby CL, Pollom RA, Jabado RW, Ebert DA, Finucci B, Pollock CM, Cheok J, Derrick DH, Herman KB, Sherman CS, VanderWright WJ, Lawson JM, Walls RHL, Carlson JK, Charvet P, Bineesh KK, Fernando D, Ralph GM, Simpfendorfer CA (2021) Overfishing drives over one-third of all sharks and rays toward a global extinction crisis. Current Biology 31(21), 4773-4787.e8.
| Crossref | Google Scholar |

Ebert DA, Fowler S, Dando M (2021) ‘Sharks of the world: a complete guide.’ (Princeton University Press)

Elasmobranch Project Indonesia (2019) Giant Guitarfish (Glaucostegus typus). (EPI) Available at https://elasmobranch.id/contributor/observation/19/ [Verified 23 October 2023]

Faizah R, Chodrijah U (2020) Size distribution and population parameter of white-spotted wedgefish (Rhynchobatus Australiae Whitley, 1939) from the eastern Indian Ocean, Indonesia. IOP Conference Series: Earth and Environmental Science 584(1), 012034.
| Crossref | Google Scholar |

Giareta EP, Prado AC, Leite RD, Padilha É, Santos IHd, Wosiak CDCDL, Wosnick N (2021) Fishermen’s participation in research and conservation of coastal elasmobranchs. Ocean & Coastal Management 199, 105421.
| Crossref | Google Scholar |

Gupta T, Booth H, Arlidge W, Rao C, Manoharakrishnan M, Namboothri N, Shanker K, Milner-Gulland EJ (2020) Mitigation of elasmobranch bycatch in trawlers: a case study in indian fisheries. Frontiers in Marine Science 7, 571.
| Crossref | Google Scholar |

Hammerschlag N, Skubel RA, Calich H, Nelson ER, Shiffman DS, Wester J, Macdonald CC, Cain S, Jennings L, Enchelmaier A, Gallagher AJ (2017) Nocturnal and crepuscular behavior in elasmobranchs: a review of movement, habitat use, foraging, and reproduction in the dark. Bulletin of Marine Science 93(2), 355-374.
| Crossref | Google Scholar |

Hansen NR (2015) Feeding ecology and habitat utilization of the great barracuda Sphyraena barracuda (Edwards 1771) in southeast Florida. MSc(MarBiol) Thesis, Nova Southeastern University, FL, USA. Available at https://nsuworks.nova.edu/occ_stuetd/32/

Haque AB, Washim M, D’Costa NG, Baroi AR, Hossain N, Nanjiba R, Hasan SJ, Khan NA (2021) Socio-ecological approach on the fishing and trade of rhino rays (Elasmobranchii: Rhinopristiformes) for their biological conservation in the Bay of Bengal, Bangladesh. Ocean & Coastal Management 210, 105690.
| Crossref | Google Scholar |

Harvey ES, Cappo M, Butler JJ, Hall N, Kendrick GA (2007) Bait attraction affects the performance of remote underwater video stations in assessment of demersal fish community structure. Marine Ecology Progress Series 350, 245-254.
| Crossref | Google Scholar |

Hermansyah RF, Adrianto L, Zulfikar A, Booth H (2022) Karakteristik biologi ikan pari kekeh (Rhynchobatus spp.) sebagai tangkapan sampingan di perairan aceh jaya. bawal widya riset perikanan tangkap. Biological characteristics of wedgefish (Rhynchobatus spp.) as by-catch in Aceh Jaya Waters. Bawal 14(2), 95-103 Available at http://ejournal-balitbang.kkp.go.id/index.php/bawal/article/view/11639/8270 [In Indonesian, also with English title and abstract].
| Google Scholar |

Hiatt RW, Strasburg DW (1960) Ecological relationships of the fish fauna on coral reefs of the Marshall Islands. Ecological Monographs 30(1), 65-127.
| Crossref | Google Scholar |

Hollowell KC (2013) A review of predator–prey interactions within marine ecosystems with a focus on top predator influences on ecosystem stability and fisheries management implications. MSc(MarBiol) Thesis, Oceanographic Center, Nova Southeastern University, USA. Available at https://nsuworks.nova.edu/cgi/viewcontent.cgi?referer=&httpsredir=1&article=1136&context=cnso_stucap

Jabado RW (2018) The fate of the most threatened order of elasmobranchs: shark-like batoids (Rhinopristiformes) in the Arabian Sea and adjacent waters. Fisheries Research 204, 448-457.
| Crossref | Google Scholar |

Jabado RW (2019) Wedgefishes and Giant Guitarfishes: a guide to species identification. (Wildlife Conservation Society) Available at www.wcs.org/our-work/wildlife/sharks-skates-rays

Jabado RW, Antonopoulou M, Möller M, Al Suweidi AS, Al Suwaidi AMS, Mateos-Molina D (2021) Baited remote underwater video surveys to assess relative abundance of sharks and rays in a long standing and remote marine protected area in the Arabian Gulf. Journal of Experimental Marine Biology and Ecology 540, 151565.
| Crossref | Google Scholar |

Jordaan GL, Mann BQ, Daly R, Dunlop SW, Cowley PD (2021) Movement patterns and growth rate of the whitespotted wedgefish Rhynchobatus djiddensis in southern Africa based on tag–recapture data. African Journal of Marine Science 43(2), 201-213.
| Crossref | Google Scholar |

Knip DM, Heupel MR, Simpfendorfer CA, Tobin AJ, Moloney J (2011) Ontogenetic shifts in movement and habitat use of juvenile pigeye sharks Carcharhinus amboinensis in a tropical nearshore region. Marine Ecology Progress Series 425, 233-246.
| Crossref | Google Scholar |

Knip DM, Heupel MR, Simpfendorfer CA (2012) Habitat use and spatial segregation of adult spottail sharks Carcharhinus sorrah in tropical nearshore waters. Journal of Fish Biology 80(4), 767-784.
| Crossref | Google Scholar | PubMed |

Kyne PM, Rigby CL, Dharmadi, Jabado RW (2019a) Bottlenose wedgefish Rhynchobatus australiae. In ‘The IUCN Red List of Threatened Species 2019’. e.T41853A68643043. (International Union for Conservation of Nature and Natural Resources) Available at https://www.iucnredlist.org/species/41853/68643043

Kyne PM, Rigby CL, Dharmadi, Gutteridge AN, Jabado RW (2019b) Giant guitarfish Glaucostegus typus. In ‘The IUCN Red List of Threatened Species 2019’. e.T104061138A68623995. (International Union for Conservation of Nature and Natural Resources) Available at https://www.iucnredlist.org/species/104061138/68623995

Kyne PM, Jabado RW, Rigby CL, Dharmadi, Gore MA, Pollock CM, Herman KB, Cheok J, Ebert DA, Simpfendorfer CA, Dulvy NK (2020) The thin edge of the wedge: extremely high extinction risk in wedgefishes and giant guitarfishes. Aquatic Conservation: Marine and Freshwater Ecosystems 30(7), 1337-1361.
| Crossref | Google Scholar |

Last PR, Stevens JD (2009) ‘Sharks and rays of Australia’, 2nd edn. (Harvard University Press)

Last PR, White WT, Carvalho M, Séret B, Stehmann M, Naylor GJP, Marshall L (Eds) (2016) ‘Rays of the world.’ (CSIRO Publishing: Melbourne, Vic., Australia)

MacKeracher T, Diedrich A, Simpfendorfer CA (2019) Sharks, rays and marine protected areas: a critical evaluation of current perspectives. Fish and Fisheries 20(2), 255-267.
| Crossref | Google Scholar |

Marganita D, Hatmoro CK, Alghozali FA, Gustianto MWD, Putri NP, Putri OK, Putra PR, Danil R, Samosir TOE (2021) Komposisi hasil tangkapan elasmobranchii berdasarkan alat tangkap dan kondisi nelayan di Demaan, Jepara. In ‘Simposium Hiu & Pari di Indonesia ke-3’, 7–8 April 2021, Jakarta, Indonesia. (Eds Kusdiantoro, H Rahayu, IM Zainuddin, Fahmi, S Koeshendrajana, NN Wiadnyana) pp. 382–390. (Pusat Riset dan Perikanan, Badan Riset dan Sumber Daya Manusia Kelautan dan Perikanan: Jakarta, Indonesia)

Mehta RS (2009) Ecomorphology of the moray bite: relationship between dietary extremes and morphological diversity. Physiological and Biochemical Zoology 82(1), 90-103.
| Crossref | Google Scholar |

Michael SW (1993) Reef sharks and rays of the world: a guide to their identification, behaviour, and ecology. Journal of the Marine Biological Association of the United Kingdom 73(4), 987.
| Crossref | Google Scholar |

Ministry of Maritime Affairs and Fisheries (2019) ‘Profil Perikanan Pari Lion Bun, Pari Kikir dan Hiu Mako di Indonesia. Direktorat Konservasi dan Keanekaragaman Hayati Laut, Direktorat Jenderal Pengelolaan Laut, Kementrian Kelautan dan Perikanan.’ (MMAF)

Moore A (2017) Are guitarfishes the next sawfishes? Extinction risk and an urgent call for conservation action. Endangered Species Research 34, 75-88.
| Crossref | Google Scholar |

Nicholson-Jack AE, Harris JL, Ballard K, Turner KME, Stevens GMW (2021) A hitchhiker guide to manta rays: patterns of association between Mobula alfredi, M. birostris, their symbionts, and other fishes in the Maldives. PLOS ONE 16(7), e0253704.
| Crossref | Google Scholar | PubMed |

O’Connor B, Cullain N (2021) Distribution and community structure of at-risk and data deficient elasmobranchs in Zavora Bay, Mozambique. African Journal of Marine Science 43(4), 521-532.
| Crossref | Google Scholar |

Phenix LM, Tricarico D, Quintero E, Bond ME, Brandl SJ, Gallagher AJ (2019) Evaluating the effects of large marine predators on mobile prey behavior across subtropical reef ecosystems. Ecology and Evolution 9(24), 13740-13751.
| Crossref | Google Scholar | PubMed |

Purushottama GB, Raje SG, Das T, Akhilesh KV, Kizhakudan SJ, Zacharia PU (2020) Reproductive biology and diet composition of Rhynchobatus laevis (Bloch and Schneider, 1801) (Rhinopristiformes: Rhinidae) from the northern Indian Ocean. Indian Journal of Fisheries 67(4), 13-23.
| Crossref | Google Scholar |

Purushottama GB, Thomas S, Kizhakudan SJ, Zaharia PU (2022) Catch composition, reproductive biology and diet of the bowmouth guitarfish Rhina ancylostomus Bloch and Shneider, 1801 (Batoidea: Rhinidae) in the eastern Arabian Sea, India. Indian Journal of Fisheries 69(2), 1-11.
| Crossref | Google Scholar |

Rizzari JR, Frisch AJ, Connolly SR (2014) How robust are estimates of coral reef shark depletion? Biological Conservation 176, 39-47.
| Crossref | Google Scholar |

Schramm KD, Marnane MJ, Elsdon TS, Jones C, Saunders BJ, Goetze JS, Driessen D, Fullwood LAF, Harvey ES (2020) A comparison of stereo-BRUVs and stereo-ROV techniques for sampling shallow water fish communities on and off pipelines. Marine Environmental Research 162, 105198.
| Crossref | Google Scholar | PubMed |

Simeon BM, Fajri I, Ula S, Muttaqin E, Ichsan M, Dharmadi, Damora A, Sarong A (2020) Laporan Teknis Pemantauan Hasil Tangkapan: Hiu dan Pari di Provinsi Aceh. Technical report, Wildlife Conservation Society Indonesia Program, Bogor, West Java, Indonesia. [In Indonesian]

Speed CW, Field IC, Meekan MG, Bradshaw CJA (2010) Complexities of coastal shark movements and their implications for management. Marine Ecology Progress Series 408, 275-293.
| Crossref | Google Scholar |

Sreekanth GB, Jaiswar AK, Akhliesh KV (2022) Feeding ecology of Giant Guitarfish, Glaucostegus cf. granulatus (Glaucostegidae: Rhinopristiformes) from eastern Arabian Sea. National Academy Science Letters 45(1), 19-24.
| Crossref | Google Scholar |

Suzuki T (2002) Development of shark fisheries and shark fin export in Indonesia: case study of Karangsong Village, Indramayu, West Java. In ‘Elasmobranch Biodiversity, Conservation and Management: Proceedings of the International Seminar and Workshop’, July 1997, Sabah, Malaysia. (Eds SL Fowler, TM Reed, FA Dipper) pp. 149–157. (IUCN SSC Shark Specialist Group: Cambridge, UK)

Vaudo JJ, Heithaus M (2011) Dietary niche overlap in a nearshore elasmobranch mesopredator community. Marine Ecology Progress Series 425, 247-260.
| Crossref | Google Scholar |

Vaudo JJ, Lowe CG (2006) Movement patterns of the round stingray Urobatis halleri (Cooper) near a thermal outfall. Journal of Fish Biology 68(6), 1756-1766.
| Crossref | Google Scholar |

White WT (2007) Species and size compositions and reproductive biology of rays (Chondrichthyes, Batoidea) caught in target and non-target fisheries in eastern Indonesia. Journal of Fish Biology 70(6), 1809-1837.
| Crossref | Google Scholar |

White J, Simpfendorfer CA, Tobin AJ, Heupel MR (2014a) Age and growth parameters of shark-like batoids: biology of shark-like batoids. Journal of Fish Biology 84(5), 1340-1353.
| Crossref | Google Scholar | PubMed |

White J, Simpfendorfer CA, Tobin AJ, Heupel MR (2014b) Spatial ecology of shark-like batoids in a large coastal embayment. Environmental Biology of Fishes 97(7), 773-786.
| Crossref | Google Scholar |

White TD, Carlisle AB, Kroodsma DA, Block BA, Casagrandi R, De Leo GA, Gatto M, Micheli F, McCauley DJ (2017) Assessing the effectiveness of a large marine protected area for reef shark conservation. Biological Conservation 207, 64-71.
| Crossref | Google Scholar |

Williamson MJ, Tebbs EJ, Dawson TP, Jacoby DMP (2019) Satellite remote sensing in shark and ray ecology, conservation and management. Frontiers in Marine Science 6, 135.
| Crossref | Google Scholar |

Willis TJ, Millar RB, Babcock RC (2000) Detection of spatial variability in relative density of fishes: comparison of visual census, angling, and baited underwater video. Marine Ecology Progress Series 198, 249-260.
| Crossref | Google Scholar |

Yulianto I, Booth H, Ningtias P, Kartawijaya T, Santos J, Sarmintohadi, Kleinertz S, Campbell SJ, Palm HW, Hammer C (2018) Practical measures for sustainable shark fisheries: lessons learned from an Indonesian targeted shark fishery. PLoS ONE 13(11), e0206437.
| Crossref | Google Scholar | PubMed |

Yuwandana DP, Agustina S, Haqqi MB, Simeon BM (2020) Studi Awal Perikanan Pari Kekeh (Rhynchobatus sp.) dan Pari Kikir (Glaucostegus sp.) di Perairan Utara Jawa Tengah. Akuatika Indonesia 5(1), 1.
| Crossref | Google Scholar |