{"id":14143,"date":"2020-07-31T14:39:29","date_gmt":"2020-07-31T02:39:29","guid":{"rendered":"https:\/\/www.greenpeace.org\/new-zealand\/?p=14143"},"modified":"2025-05-20T14:16:57","modified_gmt":"2025-05-20T02:16:57","slug":"sharks-are-thriving-at-the-kermadec-islands-but-not-the-rest-of-new-zealand-amid-global-decline","status":"publish","type":"post","link":"https:\/\/www.greenpeace.org\/aotearoa\/story\/sharks-are-thriving-at-the-kermadec-islands-but-not-the-rest-of-new-zealand-amid-global-decline\/","title":{"rendered":"Sharks are thriving at the Kermadec Islands, but not the rest of New Zealand, amid global decline"},"content":{"rendered":"\n<p>A <a href=\"https:\/\/www.nature.com\/articles\/s41586-020-2519-y\">recent global assessment<\/a> of shark populations at 371 coral reefs in 58 countries found no sharks at almost 20% of reefs and alarmingly low numbers at many others.<\/p>\n\n<p>The study, which involved over 100 scientists under the <a href=\"https:\/\/globalfinprint.org\/\">Global FinPrint<\/a> project, gave New Zealand a good score card. But because it focused on coral reefs, it included only one region \u2014 Rangit\u0101hua (Kermadec Islands), a pristine subtropical archipelago surrounded by New Zealand\u2019s <a href=\"https:\/\/www.doc.govt.nz\/parks-and-recreation\/places-to-go\/northland\/places\/kermadec-islands\/\">largest marine reserve<\/a>.<\/p>\n\n<p>It is a different story around the main islands of New Zealand. Many coastal shark species may be in decline, and less than half a percent of territorial waters is protected by marine reserves.<\/p>\n\n<h2 class=\"wp-block-heading\" id=\"h-sharks-in-aotearoa\">Sharks in Aotearoa<\/h2>\n\n<p>In New Zealand, there are <a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/abs\/10.1002\/aqc.3053\">more than a hundred species<\/a> of sharks, rays and chimaeras. They belong to a group of fishes called chondrichthyans, which have skeletons of cartilage instead of bone.<\/p>\n\n<p>Some 55% of New Zealand\u2019s chondrichthyan species are listed as \u201cnot threatened\u201d by the International Union for Conservation of Nature (<a href=\"https:\/\/www.iucn.org\/\">IUCN<\/a>). Not so encouraging is the 32% of species listed as \u201cdata deficient\u201d, meaning we don\u2019t know the status of their populations. Most species (77%) live in waters deeper than 200 metres.<\/p>\n\n<p>Seven species are <a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/abs\/10.1002\/aqc.3053\">fully protected<\/a> under the <a href=\"https:\/\/www.doc.govt.nz\/about-us\/our-role\/legislation\/wildlife-act\/\">Wildlife Act 1953<\/a>. They are mostly large, migratory species such as the <a href=\"https:\/\/blog.doc.govt.nz\/2019\/03\/12\/searching-for-manta-rays\/\">giant manta ray<\/a>. Some are threatened with extinction according to the IUCN, including great white sharks, basking sharks, whale sharks and oceanic white tip sharks.<\/p>\n\n<p>Historically, basking sharks were caught as bycatch in New Zealand fisheries, and seen in their hundreds in some inshore areas. Sightings of these giant plankton-feeders suddenly <a href=\"https:\/\/www.stuff.co.nz\/science\/105112605\/great-white-numbers-low-basking-sharks-rapidly-decline\">dried up over a decade ago<\/a>. We don\u2019t know why.<\/p>\n\n<h2 class=\"wp-block-heading\" id=\"h-commercial-shark-fisheries\">Commercial shark fisheries<\/h2>\n\n<p>Eleven chondrichthyan species are fished commercially in New Zealand under the <a href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S0308597X16303785\">quota management system<\/a>. Commercial fisheries for school shark, rig and elephant fish <a href=\"https:\/\/www.publish.csiro.au\/mf\/MF97076\">took off from the 1970s<\/a> and now catch around 8,000 tonnes per year in total.<\/p>\n\n<p>Finning of sharks has been <a href=\"https:\/\/www.mpi.govt.nz\/protection-and-response\/sustainable-fisheries\/managing-our-impact-on-marine-life\/sharks\/shark-finning-ban\/\">illegal throughout New Zealand<\/a> since 2014.<\/p>\n\n<p>Most of New Zealand\u2019s shark fisheries are <a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/abs\/10.1002\/aqc.3053\">considered sustainable<\/a>. But a sustainable fishery can mean sustained at low levels, and we must tread carefully. School shark was recently <a href=\"https:\/\/www.examiner.com.au\/story\/6829580\/international-scientific-body-lists-school-shark-as-critically-endangered\/\">added to the critically endangered list<\/a> after the <a href=\"https:\/\/www.publish.csiro.au\/mf\/MF9590150\">collapse of fisheries in Australia<\/a> and elsewhere, and there\u2019s a lot we don\u2019t know about the New Zealand population.<\/p>\n\n<p>We do know sharks were <a href=\"https:\/\/www.publish.csiro.au\/mf\/MF97076\">much more abundant<\/a> in pre-European times. In T\u012bkapa Moana (Hauraki Gulf), sharks have since declined <a href=\"https:\/\/fs.fish.govt.nz\/Page.aspx?pk=113&amp;dk=23958\">by an estimated 86%<\/a>. An ongoing <a href=\"https:\/\/www.seachange.org.nz\/\">planning process<\/a> provides some hope for the ecosystems of the gulf.<\/p>\n\n<h2 class=\"wp-block-heading\" id=\"h-protecting-sharks\">Protecting sharks<\/h2>\n\n<p>Not surprisingly, the <a href=\"https:\/\/globalfinprint.org\/about\/index.html\">global assessment<\/a> found a ban on shark fishing to be the most effective intervention to protect sharks. Several countries have recently established <a href=\"https:\/\/www.pewtrusts.org\/en\/research-and-analysis\/fact-sheets\/2016\/03\/shark-sanctuaries-around-the-world\">large shark sanctuaries<\/a>, sometimes covering entire exclusive economic zones.<\/p>\n\n<p>These countries tend to have ecotourism industries that provide economic incentives for protection \u2014 live sharks can be more valuable than dead ones.<\/p>\n\n<p>Other effective interventions are restrictions on fishing gear, such as longlines and set nets.<\/p>\n\n<p>Waters within 12 nautical miles of the Kermadec Islands have been protected by a <a href=\"https:\/\/www.doc.govt.nz\/parks-and-recreation\/places-to-go\/northland\/places\/kermadec-islands\/\">marine reserve<\/a> since 1990. In 2015, the <a href=\"https:\/\/www.mfe.govt.nz\/marine\/kermadec-ocean-sanctuary\/about-sanctuary\">Kermadec Ocean Sanctuary<\/a> was announced but progress has <a href=\"https:\/\/www.rnz.co.nz\/news\/national\/391563\/govt-criticised-for-silence-on-kermadec-ocean-sanctuary\">stalled<\/a>. The sanctuary would extend the boundaries to the exclusive economic zone, some 200 nautical miles offshore, and increase the protected area 83-fold.<\/p>\n\n<p>A large population of Galapagos sharks, which prefer isolated islands surrounded by deep ocean, thrive around the Kermadec Islands but are found nowhere else in New Zealand. <a href=\"https:\/\/www.tvnz.co.nz\/one-news\/aotearoa\/video-spell-binding-footage-shows-kermit-four-metre-long-great-white-shark-playing-camera-belonging-kiwi-researchers\">Great white sharks also visit<\/a> en route to the tropics. Many other species are found only at the Kermadecs, including three sharks and a <a href=\"https:\/\/link.springer.com\/article\/10.1007\/BF01314345\">sex-changing giant limpet<\/a> as big as a saucer.<\/p>\n\n<figure class=\"wp-block-image is-resized  caption-style-blue-overlay caption-alignment-center\"><img decoding=\"async\" src=\"https:\/\/images.theconversation.com\/files\/350312\/original\/file-20200730-19-s8ozxz.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;fit=clip\" alt=\"Galapagos sharks in the kermadecs\" style=\"width:1087px;height:611px\"\/><figcaption class=\"wp-element-caption\">Galapagos sharks were recorded around Raoul Island in the Kermadec archipelago. Author provided<\/figcaption><\/figure>\n\n<h2 class=\"wp-block-heading\" id=\"h-new-technologies-are-revealing-sharks-secrets\">New technologies are revealing sharks\u2019 secrets<\/h2>\n\n<p>What makes the <a href=\"https:\/\/globalfinprint.org\/about\/index.html\">Global FinPrint<\/a> project so valuable is that it uses a standard survey method, allowing data to be compared across the globe. The method uses a video camera pointed at a canister of bait. This contraption is put on the seafloor for an hour, then we watch the videos and count the sharks.<\/p>\n\n<p>Baited cameras have been used in a few places in New Zealand but there are no systematic surveys at a national scale. We lack fundamental knowledge about the distribution and abundance of sharks in our coastal waters, and how they compare to the rest of the world.<\/p>\n\n<p>Satellite tags are another technological boon for shark research. It is difficult to protect sharks without knowing where they go and what habitats they use. Electronic tags that transmit positional data via satellite can be attached to live sharks, <a href=\"https:\/\/www.nature.com\/articles\/s41598-020-66876-z\">revealing the details of their movements<\/a>. <a href=\"https:\/\/niwa.co.nz\/coasts-and-oceans\/research-projects\/white-sharks\">Some have crossed oceans<\/a>.<\/p>\n\n<p>Sharks have patrolled the seas for more than 400 million years. In a few decades, demand for shark meat and fins has <a href=\"https:\/\/conbio.onlinelibrary.wiley.com\/doi\/10.1111\/j.1523-1739.2012.01835.x\">reduced their numbers by around 90%<\/a>.<\/p>\n\n<p>Sharks are generally more vulnerable to exploitation than other fishes. While a young bony fish can release tens of millions of eggs in a day, mature sharks lay a few eggs or give birth to a few live young. Females take many years to reach sexual maturity and, in some species, only reproduce once every two or three years.<\/p>\n\n<p>These biological characteristics mean their populations are quick to collapse and slow to rebuild. They need careful management informed by science. It\u2019s time New Zealand put more resources into understanding our oldest and most vulnerable fishes, and the far-flung subtropical waters in which they rule.<\/p>\n\n<p><strong><a rel=\"noreferrer noopener\" href=\"https:\/\/theconversation.com\/profiles\/adam-smith-417173\" target=\"_blank\">Adam Smith<\/a>, Senior Lecturer in Statistics, <a rel=\"noreferrer noopener\" href=\"https:\/\/theconversation.com\/institutions\/massey-university-806\" target=\"_blank\">Massey University<\/a><\/strong><br><em>This article is republished from <a rel=\"noreferrer noopener\" href=\"https:\/\/theconversation.com\/nz\" target=\"_blank\">The Conversation<\/a> under a Creative Commons license. <a rel=\"noreferrer noopener\" href=\"https:\/\/theconversation.com\/sharks-are-thriving-at-the-kermadec-islands-but-not-the-rest-of-new-zealand-amid-global-decline-143439?utm_medium=email&amp;utm_campaign=Latest%20from%20The%20Conversation%20for%20July%2031%202020%20-%201691916326&amp;utm_content=Latest%20from%20The%20Conversation%20for%20July%2031%202020%20-%201691916326+CID_f355414cacb487be6d8705299533a3ff&amp;utm_source=campaign_monitor&amp;utm_term=Sharks%20are%20thriving%20at%20the%20Kermadec%20Islands%20but%20not%20the%20rest%20of%20New%20Zealand%20amid%20global%20decline\" target=\"_blank\">Read the original article.<\/a><\/em><\/p>\n<div class=\"EmptyMessage\">Block content is empty. Check the block&#8217;s settings or remove it.<\/div>\n<p class=\"has-beige-100-background-color has-background has-medium-font-size\">This article\u00a0is a guest post and doesn&#8217;t necessarily represent the views of Greenpeace.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Sharks are thriving at the Kermadec Islands, but not the rest of NZ, shows new report. <\/p>\n","protected":false},"author":9,"featured_media":14144,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_planet4_optimize_post_is_variant":false,"_planet4_optimize_experiment_name":"","_planet4_optimize_variant_name":"","ep_exclude_from_search":false,"p4_og_title":"","p4_og_description":"","p4_og_image":"","p4_og_image_id":"","p4_seo_canonical_url":"","p4_campaign_name":"not set","p4_local_project":"not set","p4_basket_name":"not set","p4_department":"","footnotes":""},"categories":[10],"tags":[25,41,44],"p4-page-type":[6],"class_list":["post-14143","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-greenpeace","tag-oceans","tag-biodiversity","tag-fishing","p4-page-type-story"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.8 (Yoast SEO v26.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Sharks are thriving at the Kermadec Islands, but not the rest of New Zealand, amid global decline<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.greenpeace.org\/aotearoa\/story\/sharks-are-thriving-at-the-kermadec-islands-but-not-the-rest-of-new-zealand-amid-global-decline\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta 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