{"id":1279,"date":"2022-04-11T14:56:46","date_gmt":"2022-04-11T12:56:46","guid":{"rendered":"https:\/\/mosj.no\/indikator\/influence\/pollution%ef%bf%bc%ef%bf%bc\/miljogifter-i-roye\/"},"modified":"2024-01-19T15:43:44","modified_gmt":"2024-01-19T14:43:44","slug":"pollutants-in-char","status":"publish","type":"bc_indicator","link":"https:\/\/mosj.no\/en\/indikator\/influence\/pollution\/pollutants-in-char\/","title":{"rendered":"Pollutants in char"},"content":{"rendered":"\n<p class=\"has-sizing-small\">Last updated 24 June 2016<\/p>\n\n\n\n<p class=\"has-sizing-medium\">Pollutant levels in char (<em>Salvelinus alpinus<\/em>) are generally low in the Arctic. Some of the highest PCB values in arctic freshwater fish are, nevertheless, measured in stationary char from Ellasj\u00f8en, a lake on Bj\u00f8rn\u00f8ya. There are two reasons for these high levels. The largest and oldest fish eat younger char. In addition, guano from seabirds reaches Ellasj\u00f8en, making char in this lake particularly exposed.<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"450\" src=\"https:\/\/mosj.no\/wp-content\/uploads\/2022\/04\/xroye-med-krok-i-kjeftenjpg-1405774060jpgpagespeedicndluh2wwoe.webp\" alt=\"Pollutants in char\" class=\"wp-image-884\" srcset=\"https:\/\/mosj.no\/wp-content\/uploads\/2022\/04\/xroye-med-krok-i-kjeftenjpg-1405774060jpgpagespeedicndluh2wwoe.webp 1200w, https:\/\/mosj.no\/wp-content\/uploads\/2022\/04\/xroye-med-krok-i-kjeftenjpg-1405774060jpgpagespeedicndluh2wwoe-300x113.webp 300w, https:\/\/mosj.no\/wp-content\/uploads\/2022\/04\/xroye-med-krok-i-kjeftenjpg-1405774060jpgpagespeedicndluh2wwoe-1024x384.webp 1024w, https:\/\/mosj.no\/wp-content\/uploads\/2022\/04\/xroye-med-krok-i-kjeftenjpg-1405774060jpgpagespeedicndluh2wwoe-768x288.webp 768w, https:\/\/mosj.no\/wp-content\/uploads\/2022\/04\/xroye-med-krok-i-kjeftenjpg-1405774060jpgpagespeedicndluh2wwoe-684x257.webp 684w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><figcaption class=\"wp-element-caption\">Photo: Guttorm Christiansen \/ akvaplan-niva<\/figcaption><\/figure>\n<\/div>\n\n\n<div class=\"wp-block-group alignwide has-white-background-color has-background\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<h2 class=\"wp-block-heading has-text-align-center has-sizing-medium\">What is being monitored?<\/h2>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-mosj-yellow-color has-alpha-channel-opacity has-mosj-yellow-background-color has-background\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-text-align-center has-sizing-medium\">Pollutants in char from Ellasj\u00f8en, Bj\u00f8rn\u00f8ya<\/h3>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wdt-wrapper-chart-loader\" data-id=\"99\"\n     style=\"height: 400px;\">\n    <div class=\"wdt-main-item\">\n                <div class=\"wdt-chart-animated-background\" style=\"height: 100px\">\n            <div class=\"wdt-background-masker wdt-btn-divide-left wdt-chart-one\"><\/div>\n            <div class=\"wdt-background-masker wdt-btn-divide-left-2\"><\/div>\n            <div class=\"wdt-background-masker wdt-btn-divide-left-3\"><\/div>\n            <div class=\"wdt-background-masker wdt-btn-divide-left-4 wdt-chart-three\"><\/div>\n            <div class=\"wdt-background-masker wdt-btn-divide-left-5\"><\/div>\n            <div class=\"wdt-background-masker wdt-btn-divide-left-6\"><\/div>\n            <div class=\"wdt-background-masker wdt-btn-divide-left-7 \"><\/div>\n            <div class=\"wdt-background-masker wdt-btn-divide-left-8\"><\/div>\n        <\/div>\n        <div class=\"wdt-chart-animated-background\" style=\"height: 100px\">\n            <div class=\"wdt-background-masker wdt-btn-divide-left\"><\/div>\n            <div class=\"wdt-background-masker wdt-btn-divide-left-2 wdt-chart-two\"><\/div>\n            <div class=\"wdt-background-masker wdt-btn-divide-left-3\"><\/div>\n            <div class=\"wdt-background-masker wdt-btn-divide-left-4\"><\/div>\n            <div class=\"wdt-background-masker wdt-btn-divide-left-5 wdt-chart-four\"><\/div>\n            <div class=\"wdt-background-masker wdt-btn-divide-left-6\"><\/div>\n            <div class=\"wdt-background-masker wdt-btn-divide-left-7\"><\/div>\n            <div class=\"wdt-background-masker wdt-btn-divide-left-8\"><\/div>\n        <\/div>\n        <div class=\"wdt-chart-animated-background\" style=\"height: 100px\">\n            <div class=\"wdt-background-masker wdt-btn-divide-left\"><\/div>\n            <div class=\"wdt-background-masker wdt-btn-divide-left-2\"><\/div>\n            <div class=\"wdt-background-masker wdt-btn-divide-left-3\"><\/div>\n            <div class=\"wdt-background-masker wdt-btn-divide-left-4\"><\/div>\n            <div class=\"wdt-background-masker wdt-btn-divide-left-5\"><\/div>\n            <div class=\"wdt-background-masker wdt-btn-divide-left-6 wdt-chart-five\"><\/div>\n            <div class=\"wdt-background-masker wdt-btn-divide-left-7\"><\/div>\n            <div class=\"wdt-background-masker wdt-btn-divide-left-8\"><\/div>\n        <\/div>\n        <div class=\"wdt-chart-animated-background\" style=\"height: 100px\">\n            <div class=\"wdt-background-masker wdt-btn-divide-left\"><\/div>\n            <div class=\"wdt-background-masker wdt-btn-divide-left-2\"><\/div>\n            <div class=\"wdt-background-masker wdt-btn-divide-left-3\"><\/div>\n            <div class=\"wdt-background-masker wdt-btn-divide-left-4\"><\/div>\n            <div class=\"wdt-background-masker wdt-btn-divide-left-5\"><\/div>\n            <div class=\"wdt-background-masker wdt-btn-divide-left-6\"><\/div>\n            <div class=\"wdt-background-masker wdt-btn-divide-left-7\"><\/div>\n            <div class=\"wdt-background-masker wdt-btn-divide-left-8\"><\/div>\n        <\/div>\n        <div class=\"wdt-static-background\">\n            <div class=\"wdt-background-masker\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n<style>\n    \n<\/style>    <script type=\"text\/javascript\">\n        if (typeof (wpDataCharts) == 'undefined') wpDataCharts = {};\n        wpDataCharts[99] = {\n            render_data: {\"wdtNumberFormat\":\"1\",\"options\":{\"title\":{\"text\":\"Pollutants in char from Ellasj\\u00f8en, 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The data show an overall decline for all the substances except HCB, which is rising.<br>(<em>Cite these data: Akvaplan-niva (2022). Pollutants in char from Ellasj\u00f8en, Bj\u00f8rn\u00f8ya. Environmental monitoring of Svalbard and Jan Mayen (MOSJ). 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Akvaplan-niva\"}},\"type\":\"highcharts_basic_column_chart\",\"height\":400},\n            engine: \"highcharts\",\n            type: \"highcharts_basic_column_chart\",\n            title: \"POPs in char from Richardvatn, Spitsbergen\",\n            container: \"wpDataChart_103\",\n            follow_filtering: 0,\n            wpdatatable_id: 107,\n            group_chart: 0        }\n    <\/script>\n\n    <div id=\"wpDataChart_103\" class=\"highcharts_basic_column_chart\" style=\"width: 100%\"><\/div>\n\n\n\n\n<p class=\"has-sizing-mini\">The figure shows organic pollutants in char from the lake Richardvatnet on Spitsbergen. The data show that all the substances are declining, but with only two measurement points the year-to-year variation is uncertain.<br>(<em>Cite these data: <\/em>Akvaplan-niva (2022). POPs in char from Richardvatn, Spitsbergen. Environmental monitoring of Svalbard and Jan Mayen (MOSJ). URL: https:\/\/mosj.no\/en\/influence\/pollution\/pollution-char.html)<\/p>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-pb-accordion-item c-accordion__item js-accordion-item no-js\" data-initially-open=\"false\" data-click-to-close=\"true\" data-auto-close=\"false\" data-scroll=\"false\" data-scroll-offset=\"0\"><h2 id=\"at-12790\" class=\"c-accordion__title js-accordion-controller\" role=\"button\">Details on these data<\/h2><div id=\"ac-12790\" class=\"c-accordion__content\">\n<figure class=\"wp-block-table is-style-stripes\"><table><tbody><tr><td><strong>Last updated<\/strong><\/td><td>24 June 2016<\/td><\/tr><tr><td><strong>Update interval<\/strong><\/td><td>Every 5th year<\/td><\/tr><tr><td><strong>Commissioning organization<\/strong><\/td><td><a href=\"http:\/\/www.npolar.no\/en\/\" target=\"_blank\" rel=\"noreferrer noopener\">Norwegian Polar Institute<\/a><\/td><\/tr><tr><td><strong>Executive organization<\/strong><\/td><td><a href=\"http:\/\/www.akvaplan.niva.no\/en\/\" target=\"_blank\" rel=\"noreferrer noopener\">Akvaplan-niva<\/a><\/td><\/tr><tr><td><strong>Contact persons<\/strong><\/td><td><a href=\"https:\/\/akvaplan.no\/en\/people\/id\/gnc\/Christensen\/Guttorm\" target=\"_blank\" rel=\"noreferrer noopener\">Guttorm Christensen<\/a><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Method<\/h3>\n\n\n\n<p class=\"has-sizing-medium\">The samples are processed in the laboratory using a variety of techniques to permit the analysis of several groups of pollutants. The following is performed to analyse organic, fat-soluble herbicides, PCBs and some brominated flame retardants (BFRs):<\/p>\n\n\n\n<p class=\"has-sizing-medium\">Muscle samples are homogenised, ca 3g are weighed and an internal standard is added. Sodium sulphate is used to remove water from the sample. Fat and fat-soluble substances are extracted from the sample using the solvents acetone and cyclohexane. The quantity of fat is determined in a small part of the extract by weighing. Fat must be removed from the extract prior to analysis. This is done using a GPC (<em>Gel Permeation Chromatography<\/em>) robot.<\/p>\n\n\n\n<p class=\"has-sizing-medium\">The sample is analysed with an interlinked, high-resolution, gas chromatograph (GC) and mass spectrometer (MS). The concentrations are calculated by quantifying internal standards with known concentration and comparing these with the response (chromatogram) from the samples.<\/p>\n\n\n\n<p class=\"has-sizing-medium\">As the data were collected every 10th year until 2016, the analysis will not supply information on year-to-year variations in the pollutant concentration. When the time series is analysed, allowance must therefore be made for the possibility that year-to-year variations are not detected.<\/p>\n\n\n\n<p class=\"has-sizing-medium\">Detection limits for the individual compounds are three times the noise level of the instrument. The detection limit varies between each analysis and different types of samples, but the typical detection limit is&nbsp;1\u2013500 pg\/g&nbsp;wet weight (corresponding to&nbsp;0.001\u20130.5 ng\/g&nbsp;wet weight). The uncertainty is around&nbsp;25\u201330 %. The detection limit in particular, but also the measurement uncertainty, has been improved in recent years. In all time series, there will therefore be increasing uncertainty attached to measurements earlier in the series.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Analysis of mercury (Hg)<\/h4>\n\n\n\n<p class=\"has-sizing-medium\">Mercury was analysed using cold extraction and an MHS-15 (<em>Mercury\/Hydride System<\/em>). Quality assurance and quality control for the mercury analyses included the analysis of blank samples and duplicates, and the use of reference materials and an internal standard. The detection limit was&nbsp;0.005 mg\/kg&nbsp;wet weight.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Quality<\/h3>\n\n\n\n<p class=\"has-sizing-medium\">Fieldwork is carried out using the best available methods to avoid sample contamination. Samples from the Bj\u00f8rn\u00f8ya lakes, \u00d8yangen and Laksvatn, are treated as coming from a single lake. \u00d8yangen was originally chosen as a reference lake for far-transported pollutants, but Laksvatn had to take over because \u00d8yangen had a small char stock. These lakes can be compared because they have the same qualities. Both are on the low plain on the northern part of Bj\u00f8rn\u00f8ya. Both are oligotrophic and there is no run-off to them from the settlement or former human activity, and unlike Ellasj\u00f8en they are not affected by seabirds.<\/p>\n\n\n\n<p class=\"has-sizing-medium\">The chemical analyses were performed by NILU-Troms\u00f8, which is a research laboratory. It uses the same internationally published and approved techniques as the accredited NILU laboratory in Oslo. To avoid contamination, only superclean equipment is used. A blank sample and a standard reference sample are analysed for each tenth sample. In addition to the accreditation, the laboratory regularly takes part in international intercalibration tests. All the data used in the indicator are collected for research. They may therefore not be collected optimally with respect to monitoring. For this reason, all the data are assessed for comparability before being included in the indicator. The most important factors assessed for char are the time of year the samples were collected and that all the samples consist of muscle. Many data points presented in scientific publications will therefore not be included in the indicator.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Reference level and action level<\/h3>\n\n\n\n<p class=\"has-sizing-medium\">Since persistent organic pollutants are anthropogenic pollutants which are not found in a natural state, the reference level for an unaffected state will be zero (in reality, the detection limit).<\/p>\n\n\n\n<p class=\"has-sizing-medium\">Serious efforts have been made to limit the spread of persistent organic pollutants. The Stockholm Convention regulates an international ban on the manufacture and use of PCBs, several herbicides, brominated flame retardants and some fluorine compounds.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Food safety and harmful effects<\/h4>\n\n\n\n<p class=\"has-sizing-medium\">Since many organic pollutants are poorly degradable and fat-soluble, they may be accumulated and concentrated upwards in the food chain (biomagnification). Fish, birds and mammals \u2013 including people \u2013 will therefore be exposed to the highest concentrations. Dioxin and dioxin-like PCBs are found in fatty fish, meat, dairy products and eggs. In fatty fish, these substances are found in fillets and in lean fish in the liver.<\/p>\n\n\n\n<p class=\"has-sizing-medium\">Dioxin-like PCBs are carcinogenic and they can be transferred during pregnancy from the mother to the embryo.<\/p>\n\n\n\n<p class=\"has-sizing-medium\">The calculation of toxicity equivalents (TEQ) for dioxin-like PCBs in char fillets from Ellasj\u00f8en in 2010 shows an average TEQ value as high as&nbsp;42.5ng\/kg&nbsp;wet weight (min\u2013max values: 1.93\u201381.3). There is no specific tolerance level for dioxin-like PCBs in fish, but the&nbsp;<a href=\"http:\/\/nifes.no\/forskningstema\/trygg-sjomat\/uonsket-sjomat\/dioksiner-furaner-og-dioksinlignende-pcb\/\">tolerance level for the sum of dioxins and dioxin-like PCBs in fish<\/a>&nbsp;which can be sold as food for humans is&nbsp;6.5 ng TEQ\/kg. This means that it would not be permissible to sell (average) fish from Ellasj\u00f8en. However, if you are to eat a fish from Ellasj\u00f8en, it is the tolerable weekly intake of the sum of dioxins and dioxin-like PCBs that has significance. This tolerance level is&nbsp;14 pg TEQ\/kg&nbsp;body weight per week. This means that a&nbsp;60kg&nbsp;person only needs to eat&nbsp;20g&nbsp;of fish from Ellasj\u00f8en to consume the tolerable weekly intake of dioxins and dioxin-like PCBs.<\/p>\n\n\n\n<p class=\"has-sizing-medium\">Average TEQ levels for trout in mainland Norway are\u00a00.36ng\/kg. Levels of \u03a3PCB and toxicity equivalents (TEQ) for dioxin-like PCBs are presented in\u00a0<a href=\"http:\/\/Akvaplan-niva rapport 4232 \u2013 Christensen og Evenset (2011) Milj\u00f8gifter i r\u00f8ye fra innsj\u00f8er p\u00e5 Svalbard\" target=\"_blank\" rel=\"noreferrer noopener\">Akvaplan-niva report 4232 \u2013 Christensen and Evenset (2011) Pollutants in char from lakes in Svalbard\u00a0<\/a>(in Norwegian).<\/p>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Status and trend<\/h2>\n\n\n\n<p class=\"has-sizing-medium\">The amount (concentration) of organic pollutants, PCBs (industrial chemicals), DDT, HCB, toxaphene (herbicides) and the brominated flame retardant PBDE-47, is declining in general in the environment. This is because agreements have nationally and internationally regulated the use and discharge of these substances. In most cases, there is a total ban on their manufacture and use, but some exceptions exist. The Stockholm Convention regulates the manufacture and use of organic pollutants.<\/p>\n\n\n\n<p class=\"has-sizing-medium\">The figures show that the concentrations in \u00d8yangen\/Laksvatn on Bj\u00f8rn\u00f8ya have dropped. In 2009, they were around&nbsp;10\u201330 %&nbsp;of what they were in 1996, except for HCB, whose concentration is unchanged.<\/p>\n\n\n\n<p class=\"has-sizing-medium\">We do not see this pattern in Ellasj\u00f8en, which is situated 4 and&nbsp;10 km&nbsp;south of \u00d8yangen\/Laksvatn, respectively. Here, there is no change in the concentration between 1996 and 2009, except for the brominated flame retardant PBDE-47, which was halved from 1999 to 2009. Ellasj\u00f8en has, in general, a much higher level of organic pollutants than \u00d8yangen\/Laksvatn. In 2009, the figures for the various substances show that there are&nbsp;10\u2013100 times&nbsp;more pollutants in fish from Ellasj\u00f8en than in fish from \u00d8yangen\/Laksvatn. Several factors explain this difference. Ellasj\u00f8en has a larger catchment area than \u00d8yangen\/Laksvatn. It also receives more precipitation due to the hills in the south of the island. Ellasj\u00f8en is deeper so that the circulation time in the lake is longer. However, the most important factor is that large numbers of seabirds deposit guano in the catchment area and directly into the lake. A large colony of little auks nests in the scree above the lake, and seabirds like kittiwakes and glaucous gulls use Ellasj\u00f8en to wash and rest. Organic pollutants are transported from the marine environment to Ellasj\u00f8en in this way.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Causal factors<\/h2>\n\n\n\n<p class=\"has-sizing-medium\">The reason for the decline of organic pollutants in the environment is their reduced use and discharge, because many of them are regulated. We see a reduction of most of the organic pollutants in char in all the three lakes that are monitored, the exception being HCB which is rising in Ellasj\u00f8en and Laksvatn on Bj\u00f8rn\u00f8ya. Moreover, the reduction is not as distinct in Ellasj\u00f8en. There are probably several reasons why the pattern for Ellasj\u00f8en differs from that in the other lakes. Ellasj\u00f8en differs from other lakes on Bj\u00f8rn\u00f8ya and elsewhere in Svalbard in several ways; it is deep, it receives more precipitation than other parts of Bj\u00f8rn\u00f8ya and Svalbard, and there is a new supply of pollutants from run-off from old and new guano (seabird impact). This, combined with the substances being stable and the life span of char being long (char can be&nbsp;25 years&nbsp;old), means that it takes time for the pollutant concentrations in char to drop.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Consequences<\/h2>\n\n\n\n<p class=\"has-sizing-medium\">The total load of pollutants in Ellasj\u00f8en, Bj\u00f8rn\u00f8ya, impacts on the enzyme system (EROD, CYP1A) which is involved in the degrading of pollutants and disturbs the sexual hormones (induction of vitellogenin) (Wiseman et al. 2011).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">About the monitoring<\/h2>\n\n\n\n<p class=\"has-sizing-medium\">The char is the only freshwater fish in Svalbard and Jan Mayen. In most lakes, it is stationary and is affected by pollutants transported in the atmosphere from inhabited areas on the continents. Some lakes are located such that char can migrate to the sea in the summer to feed and return as anadromous fish in the autumn. They may thus be affected by pollutants in the sea and the lake. The impact of both long-transported and marine pollutants can be monitored in carefully selected lakes.<\/p>\n\n\n\n<div class=\"wp-block-group has-light-grey-background-color has-background\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<h3 class=\"wp-block-heading\">Places and areas<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"http:\/\/stadnamn.npolar.no\/stadnamn\/Richardvatnet?ident=12017&amp;lang=en\" target=\"_blank\" rel=\"noreferrer noopener\">Richardvatnet<\/a><\/li>\n\n\n\n<li><a href=\"http:\/\/stadnamn.npolar.no\/stadnamn\/Ellasj%C3%B8en?ident=3345&amp;lang=en\" target=\"_blank\" rel=\"noreferrer noopener\">Ellasj\u00f8en<\/a><\/li>\n\n\n\n<li><a href=\"http:\/\/stadnamn.npolar.no\/stadnamn\/Laksvatnet?ident=8111&amp;lang=en\" target=\"_blank\" rel=\"noreferrer noopener\">Laksvatnet<\/a><\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group has-light-grey-background-color has-background\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Relations to other monitoring<\/h3>\n\n\n\n<h4 class=\"wp-block-heading has-sizing-medium\">Monitoring programme<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>None<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading has-sizing-medium\">International environmental agreements<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"http:\/\/chm.pops.int\/\" target=\"_blank\" rel=\"noreferrer noopener\">The Stockholm Convention<\/a><\/li>\n\n\n\n<li><a href=\"http:\/\/www.mercuryconvention.org\/\" target=\"_blank\" rel=\"noreferrer noopener\">The Minamata Convention<\/a><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading has-sizing-medium\">Voluntary international cooperation<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>None<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading has-sizing-medium\">Related monitoring<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>None<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Further reading<a href=\"https:\/\/mosj.no\/en\/fauna\/marine\/zooplankton-species-composition.html#refs\"><\/a><\/h2>\n\n\n\n<div class=\"wp-block-group has-light-grey-background-color has-background\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<h3 class=\"wp-block-heading has-sizing-medium\">Links<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"http:\/\/fylker.miljostatus.no\/en\/Svalbard\/Tema-A-A\/Animals-and-plants\/Arctic-char\/\" target=\"_blank\" rel=\"noreferrer noopener\">Arctic charr in Svalbard<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.environment.no\/topics\/environmental-contaminants\/\" target=\"_blank\" rel=\"noreferrer noopener\">Environmental contaminants<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/sjomatdata.hi.no\/#search\/\" target=\"_blank\" rel=\"noreferrer noopener\">Seafood database<\/a><\/li>\n<\/ul>\n<\/div><\/div>\n","protected":false},"featured_media":884,"parent":1234,"menu_order":0,"template":"","class_list":["post-1279","bc_indicator","type-bc_indicator","status-publish","has-post-thumbnail"],"acf":[],"_links":{"self":[{"href":"https:\/\/mosj.no\/en\/wp-json\/wp\/v2\/bc_indicator\/1279","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mosj.no\/en\/wp-json\/wp\/v2\/bc_indicator"}],"about":[{"href":"https:\/\/mosj.no\/en\/wp-json\/wp\/v2\/types\/bc_indicator"}],"version-history":[{"count":1,"href":"https:\/\/mosj.no\/en\/wp-json\/wp\/v2\/bc_indicator\/1279\/revisions"}],"predecessor-version":[{"id":63012,"href":"https:\/\/mosj.no\/en\/wp-json\/wp\/v2\/bc_indicator\/1279\/revisions\/63012"}],"up":[{"embeddable":true,"href":"https:\/\/mosj.no\/en\/wp-json\/wp\/v2\/bc_indicator\/1234"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mosj.no\/en\/wp-json\/wp\/v2\/media\/884"}],"wp:attachment":[{"href":"https:\/\/mosj.no\/en\/wp-json\/wp\/v2\/media?parent=1279"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}