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Sailor Børge Torsvik catching herring in the trawl. Photographer: Erling Kåre Stenevik / HI

Norwegian herring catches in Kvænangen plunge this winter

Click on the flag for more information about Norway NORWAY
Thursday, January 29, 2026, 02:30 (GMT + 9)

Only one-third of last year’s overwintering herring returned to Kvænangen, surprising researchers and fishermen alike.

Herring catches in Kvænangen, northern Norway, have fallen sharply this winter, with researchers estimating that only around one-third of last year’s overwintering stock was present in the fjord.

Since the winter of 2017–2018, large quantities of Norwegian spring-spawning herring (NVG herring) have overwintered in the Kvænangen area in Troms and Finnmark, providing major benefits for local fisheries. This development has been closely followed by scientists at the Norwegian Institute of Marine Research (HI), including researcher Erlend Astad Lorentzen, who has highlighted the importance of the area for both science and fisheries.

Commercial catches of herring in the wintering area between 15 November and 15 December, based on the Directorate of Fisheries' electronic catch diaries. Each point represents a catch of at least 10 tonnes. Click on the image to enlarge it

However, new data from this winter’s monitoring expedition show a dramatic change.

Two-thirds decline compared to last year

Based on acoustic surveys and biological sampling, researchers conclude that the amount of herring overwintering in Kvænangen has dropped by about two-thirds compared to 2024.

We estimate that there were around 780,000 tonnes of herring in the area this winter. Last year, the figure was close to two million tonnes, says expedition leader Erling Kåre Stenevik from HI.

The measurements were carried out in December, when the research vessel “Johan Hjort”, together with the remotely operated vehicle “Frida”, conducted echosounder surveys and collected samples using trawls.

Dominated by nine- and four-year-olds

Analysis of the samples shows that the overwintering herring mainly consisted of two age groups. Nine-year-old herring from the 2016 year class accounted for just over one-third of the biomass, while four-year-olds from the 2021 year class made up just under one-third.

Senior engineer Bjørn Vidar Svendsen takes samples of NVG herring. Photographer: Erling Kåre Stenevik

According to Erlend Astad Lorentzen of the Norwegian Institute of Marine Research, these findings are crucial for understanding how different year classes influence where the stock chooses to overwinter.

Likely overwintered elsewhere

Researchers emphasize that the decline in Kvænangen does not indicate a weakening herring stock overall. On the contrary, the total NVG herring population is currently assessed as positive.

Our measurements only tell us how much herring overwintered in the surveyed area, explains Stenevik. The results suggest that a large proportion of the NVG herring overwintered elsewhere this year, most likely out at sea.

Research technician Eilert Hermansen sorts herring. Photographer: Erling Kåre Stenevik / HI

He points to an international herring fishery in the eastern and central Norwegian Sea during late autumn and winter as a possible factor influencing the herring’s distribution.

A long history of shifting winter grounds

Historically, NVG herring have shown highly variable overwintering behavior. Before settling in Kvænangen, large parts of the stock wintered near Kvaløya, earlier in the Norwegian Sea, and before that again in the Vestfjorden. In even earlier times, the herring overwintered east of Iceland.

Are Salthaug and Fredrik Gelin interpret sonar data. Photographer: Erling Kåre Stenevik

There is probably a certain randomness involved, says Stenevik. Just as with spawning, strong and new year classes may lead the way to new areas.

When many billions of individuals are “making decisions” at the same time, unpredictability is simply part of the system, he adds.

Further insight into which year classes dominate the marine fishery will become available once scientists have analyzed catch samples submitted by fishermen through the catch sample lottery, a program coordinated by HI.


🇯🇵 Japanese

ノルウェーのクヴェナンゲンで今冬ニシン漁獲量が急減

昨冬と比べ、越冬のためクヴェナンゲンに戻ってきたニシンはわずか3分の1にとどまった。

ノルウェー北部のクヴェナンゲンでは、今冬のニシン漁獲量が大幅に減少した。研究者によると、越冬のため同地域に集まったニシンは、昨年の約3分の1にとどまったという。

2017~2018年の冬以降、ノルウェー春産卵ニシン(NVGニシン)は、トロムス・オグ・フィンマルク県のクヴェナンゲン周辺で大量に越冬してきた。この動きは漁業者にとって大きな恩恵となっており、ノルウェー海洋研究所(HI)の研究者エルレンド・アスタッド・ローレンツェンも、その重要性を指摘してきた。

しかし、今冬の調査結果は大きな変化を示している。

昨年比で3分の2減少

音響調査と生物サンプリングの結果、2024年と比べ、クヴェナンゲンで越冬したニシンの量は約3分の2減少したと結論づけられた。

–「今冬、同地域にいたニシンは約78万トンと推定されます。2024年には約200万トンが確認されていました」と、調査隊長のエルリング・コーレ・ステネヴィクは述べている。

調査は12月に実施され、調査船**「ヨハン・ヒョルト」と遠隔操作無人機「フリーダ」**が、魚群探知機による測定とトロール網による採集を行った。

9歳魚と4歳魚が中心

分析の結果、越冬したニシンの多くは2つの年級群で構成されていた。2016年級群の9歳魚が全体の3分の1強を占め、2021年級群の4歳魚3分の1弱を占めていた。

ノルウェー海洋研究所(HI)エルレンド・アスタッド・ローレンツェンによると、こうした年級構成は、ニシンが越冬場所を選択する行動を理解するうえで重要だという。

他海域で越冬した可能性

研究者らは、今回の減少がニシン資源全体の悪化を意味するものではないと強調する。NVGニシン資源は現在、良好な状態にある。

–「今回の調査結果は、あくまで調査海域で越冬したニシンの量を示すものです」とステネヴィクは説明する。
–「今冬は、多くのNVGニシンが別の場所、おそらく外洋で越冬したことを示唆しています」

その背景として、ノルウェー海東部および中央部で、晩秋から冬にかけて行われた国際的なニシン漁業が影響した可能性を挙げている。


🇨🇳 Chinese (Simplified)

挪威克韦南恩地区今冬鲱鱼捕捞量大幅下降

与去年相比,只有约三分之一的鲱鱼前往克韦南恩越冬。

今年冬季,挪威北部克韦南恩(Kvænangen)地区的鲱鱼捕捞量大幅下降。研究人员估计,前来该地区越冬的鲱鱼数量仅为去年的三分之一

2017—2018年冬季以来,大量挪威春季产卵鲱鱼(NVG鲱鱼)一直在特罗姆斯-芬马克(Troms og Finnmark)克韦南恩海域越冬,这一现象长期为当地渔业带来显著益处。**挪威海洋研究所(HI)研究人员埃尔伦德·阿斯塔德·洛伦岑(Erlend Astad Lorentzen)**也多次强调该区域的重要性。

然而,今年冬季的监测结果显示情况发生了明显变化。

数量较去年减少三分之二

根据声学调查和生物样本分析,研究人员得出结论:克韦南恩越冬鲱鱼数量较2024年减少了约三分之二

–“我们估计,今年该地区约有78万吨鲱鱼,而在2024年,这一数字约为200万吨,”本次调查负责人**埃尔林·科勒·斯滕内维克(Erling Kåre Stenevik)**表示。

调查于12月进行,科研船**“约翰·希约特号(Johan Hjort)”与遥控潜水器“弗里达(Frida)”**共同使用回声测深仪开展测量,并通过拖网采集样本。

以9龄鱼和4龄鱼为主

样本分析显示,越冬鲱鱼主要由两个年龄组构成:2016年级群的9龄鲱鱼占比略高于三分之一,而2021年级群的4龄鲱鱼占比略低于三分之一

挪威海洋研究所(HI)埃尔伦德·阿斯塔德·洛伦岑指出,这些结果对于理解不同年级群如何影响鲱鱼越冬分布至关重要。

可能转移至其他海域越冬

研究人员强调,此次下降并不意味着鲱鱼总体资源状况恶化。目前,NVG鲱鱼资源评估结果仍然向好

–“这些测量结果仅反映有多少鲱鱼在调查海域越冬,”斯滕内维克解释说。
–“结果表明,今年冬季,大量NVG鲱鱼可能选择在其他地区,尤其是外海越冬。”

他还指出,挪威海东部和中部在深秋和冬季进行的国际鲱鱼渔业活动,可能影响了鲱鱼的分布。


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