Fishing Production and Fishing Changes in Hong Kong after the Ground Trawl Ban of 31st December 2012: A Geospatial Evaluation
Source: By:Alastor M. Coleby, Eric P. M. Grist
DOI: https://doi.org/10.30564/jgr.v6i1.5315
Abstract:From data published by the Hong Kong SAR (HKSAR) government in their two sole fisheries surveys of 2006 and 2016/2017, the current authors produced regional maps using spatial interpolation to more accurately describe and estimate the geographic coverage of changes in fishing production in Hong Kong waters since the ground trawl ban of 2012 December 31st. These suggest the fishing industry has adapted to smaller craft, and that fishing production increased in several areas in the period after the ground trawl ban came into effect. In addition, the maps enable a smoother assessment to be made of the geospatial changes in fishing production which have occurred since the ground trawl ban and suggest a ‘workaround’ by fishermen. In particular, small fishing craft known as sampans are able to take advantage by being more suitable vessels for areas such as narrower or shallower bays. Marine plastics pollution is also a proxy indicator of these activities, as evidenced by discarded fishing gear that includes plastic nets, floats, and other fishing boat equipment.
References:[1] Macdonald, M., 2014. Expansion of Hong Kong International Airport into a Three-Runway System Environmental Impact Assessment Report Appendix 14.4 Fisheries Homeport Interview Survey Findings [Internet]. Appendix 14.4 Fisheries Homeport Interview Survey Findings [cited 2022 Aug 12]. Available from: https://www.epd.gov.hk/eia/register/report/eiareport/eia_2232014/html/Appendix%2014.4%20Fisheries%20Homeport%20Findings%20(with%20Annexes).pdf. [2] Marine Traffic [Internet] [cited 2020 Jun 7]. Available from: https://www.marinetraffic.com/en/ais/home/centerx:114.095/centery:22.235/zoom:12. [3] Birchenough, S.E., Cooper, P.A., Charles, A., 2021. Vessel monitoring systems as a tool for mapping fishing effort for a small inshore fishery operating within a marine protected area. Marine Policy. 124, 104325. [4] Bousquet, C., Bouet, M., Patrissi, M., et al., 2022. Assessment of catch composition, production and fishing effort of small-scale fisheries: The case study of Corsica Island (Mediterranean Sea). Ocean & Coastal Management. 218, 105998. [5] Hong Kong Government, 2022. Agriculture, Fisheries and Conservation Department Port Survey 2016/2017 [Internet]. Available from: https://www.afcd.gov.hk/english/fisheries/fish_cap/fish_cap_latest/fish_cap_latest.html. [6] GADM, 2015. Database of Global Administrative Areas [Internet]. Available from: https://www.gadm.org [7] Grist, E.P.M., 2022. ‘Spread’ of artemisinin resistance in Myanmar revisited. International Journal of Tropical Disease & Health. 43(15), 1-16. doi: https://doi.org/10.9734/ijtdh/2022/v43i1530643. [8] Coleby. A.M., Grist, E.P.M., 2019. Prioritized area mapping for multiple stakeholders through geospatial modelling: A focus on marine plastics pollution in Hong Kong. Ocean and Coastal Management. 171, 131-141. [9] Grist, E.P.M., Coleby, A.M., 2020. A geostatis tical approach to joint stakeholder prioritization for tackling marine plastics pollution in Hong Kong. Marine Pollution Bulletin. 157, 111268. [10]ESRI, 2022. ArcGIS for Desktop, ArcMap. How Kriging works [Internet] [cited 2022 Nov 3]. Available from: https://desktop.arcgis.com/en/arcmap/10.3/tools/3d-analyst-toolbox/howkriging-works.htm#:~:text=Kriging%20is%20a%20multistep%20process,directional%20bias%20in%20the%20data. [11] Cressie, N., 2015. Statistics for spatial data, revised edition. Wiley: New York. pp. 105-209. [12]Hong Kong Government, Marine Department, 2017. Hong Kong Licensed Vessels (as at Year End) [Internet] [cited 2022 Oct 31]. Available from:https://www.mardep.gov.hk/en/fact/pdf/portstat_2_y_e3.pdf. [13]World Wildlife Fund (WWF), Hong Kong, 2022. Marine Protected Areas [Internet] [cited 200 Apr 21]. Available from: https://www.wwf.org.hk/en/oceans/protection/. [14]Hong Kong Government, 2022. GeoInfo Map [Internet] [cited 2022 Mar 21]. Available from: https://www.map.gov.hk/gm/Date. [15]Cheung, P.K., Fok, L., Hung, P.L., et al., 2018. Spatio-temporal comparison of neustonic micro plastic density in Hong Kong waters under the influence of the Pearl River Estuary. Science of the Total Environment. 628, 731-739. [16]World Wildlife Fund (WWF), 2020. Stop Ghost Gear. The Deadliest Form of Marine Plastics [Internet] [cited 2021 Nov 16]. Available from: https://europe.nxtbook.com/nxteu/wwfintl/ghost_gear_report/index.php#/p/1. [17]Gilman, E., Chopin, F., Suuronen, P., et al., 2016. Abandoned, lost and discarded gillnets and trammel nets: Methods to estimate ghost fishing mortality, and the status of regional monitoring and management, FAO. FAO Fisheries and Aquaculture Technical Paper No. 600. Available from: https://www.researchgate.net/publication/290998244_Abandoned_Lost_and_Discarded_Gillnets_and_Trammel_Nets_Methods_to_Estimate_Ghost_Fishing_Mortality_and_Status_of_Regional_Monitoring_and_Management. [18]Manbohi, A., Rahnama, R., Dehbandi, R., et al., 2021. Spatial distribution of microplastics in sandy beach and inshore-offshore sediments of the southern Caspian Sea. Marine Pollution Bulletin. 169, 112578. [19]Wright, L.S., Napper, I.E., Thompson, R.C., 2022. Potential microplastic release from beached fishing gear in Great Britain’s region of highest fishing litter density. Marine Pollution Bulletin. 173(Part B), 113115. [20]Hong Kong Government, 1980. Dumping at Sea Ordinance (Cap. 466) [Internet] [cited 2022 Aug 12]. Available from: https://www.epd.gov.hk/epd/english/laws_regulations/envir_legislation/leg_waste.html. [21]Hong Kong Government, 1933. Summary Of fences Ordinance (Cap. 228) [Internet]. Con-tains Provisions Related to Littering Offences Including Marine Littering [cited 2022 Aug 12]. Available from: https://www.epd.gov.hk/epd/english/laws_regulations/envir_legislation/leg_waste.html. [22]Davies, L., Kemp, A., O’Loughlin, C., et al., 2022. Is conscientious beachcombing the key to ‘unlock’ marine plastic pollution trends through citizen science? A case study from Cockburn Sound, Western Australia. Marine Pollution Bulletin. 177, 113519. [23]Environmental Investigation Agency Report, 2020. Nothing Fishy About It: Meaningful Measures on Fishing Gear at IMO [Internet] [cited 2022 Aug 12]. Available from: https://eia-international.org/wp-content/uploads/EIA-reportNothing-Fishy-About-It-IMO-Briefing-singlepages-for-print.pdf. [24]Gilman, E., Humberstone, J., Wilson, J.R., et al., 2022. Matching fishery-specific drivers of abandoned, lost and discarded fishing gear to relevant interventions. Marine Policy. 141, 105097. [25]Gajanur, A.R., Jaafar, Z., 2022. Abandoned, lost, or discarded fishing gear at urban coastlines. Marine Pollution Bulletin. 175, 113341. [26]Isobe, A., Iwasaki, S., 2022. The fate of missing ocean plastics: Are they just a marine environmental problem? Science of the Total Environment. 825, 153935. [27]Song, S.H., Lee, H.W., Kim, J.N., et al., 2022. First observation and effect of fishery of seabed litter on sea bed by trawl survey Korea waters. Marine Pollution Bulletin. 170, 112228. [28]Cheung, W.W.L., Sadovy, Y., 2004. Retrospective evaluation of data-limited fisheries: A case from Hong Kong article. Reviews in Fish Biology and Fisheries. 14, 181-206. [29]Leung, K.M.Y., 2022, City university of Hong Kong. Workshop on Marine Spatial Planning in Hong Kong—Insights from EU Countries and the Way Forward for Hong Kong [Internet]. BECoME [cited 2021 Jan 7]. Available from:https://www.cityu.edu.hk/sklmp/news/events/become-2022. [30]Hong Kong Government, 2022. The Natural Resources & Nature Conservation Policy in Hong Kong. [Internet] [cited 2023 Jan 11]. Available from: https://www.gov.hk/en/residents/environment/conservation/naturalresourceconservation.htm. [31]World Wildlife Fund (WWF), 2022. WWF Hong Kong 2022-23 Policy Address Recom mendation: A Holistics Nature Conservation Policy for Sustainable Development [Internet] [cited 11 January 2023]. Available from: https://wwfhk.awsassets.panda.org/downloads/wf_hong_kong_2022_23_policy_address_recommendation_eng.pdf. [32]Wackernagel, H., 1995. Multivariate geostatistics: An introduction with applications. Springer-Verlag: Berlin. pp. 256. [33]The Math Works, Inc., 2019. MATLAB. Version 2019b. Computer Software. Available from:https://www.mathworks.com/ [34]Hunter, G., Lowell, K. (editors), 2002. Is the ordinary kriging variance a proper measure of interpolation error? Proceedings of the Fifth International Symposium on Spatial Accuracy Assessment in Natural Resources and Environ mental Sciences; Australia: RMIT University. p. 179-186. Available from: https://hdl.handle.net/11245/1.195474.