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4. Herring Assessment Working Group (HAWG)

Author

Arge, Jan, Bartolino, Valerio, Bekkevold, Dorte, Berg, Florian, Berges, Benoit, Håkansson, Kirsten Birch, Brazier, Aaron, Brooks, Mollie Elizabeth, Clarke, Maurice W., Davies, Julie Olivia, De Oliveira, Jose, Egan, Afra, Finke, Annegret, Farrell, Edward D., Gras, Michael, Haase, Stefanie, Henriksen, Ole, Hintzen, Niels, Huwer, Bastian, Homrum, Eydna í, Johnsen, Espen, Kenyon, Susan, Kloppmann, Matthias, Kotterba, Paul, Kvamme, Cecilie, Loots, Christophe, Mackinson, Steve, Lusseau, Susan Mærsk, Marchal, Paul, Albertsen, Christoffer Moesgaard, Mosegaard, Henrik, Moore, Claire, Nash, Richard, Needle, Coby, Nolan, Cormac, O'Connell, Steven, O'Malley, Michael, Ourens, Rosana, Pert, Campbell, Polte, Patrick, Prista, Nuno, Sparrevohn, Claus Reedtz, Regnier, Thomas, Ribeiro, Joseph, Rindorf, Anna, Rohlf, Norbert, Jacobsen, Nis Sand, Schuchert, Pia, Trijoulet, Vanessa, van Deurs, Mikael Seehusen Kruchov, Vandamme, Cindy, Vatnehol, Sindre, Berg, Casper Willestofte, Arge, Jan, Bartolino, Valerio, Bekkevold, Dorte, Berg, Florian, Berges, Benoit, Håkansson, Kirsten Birch, Brazier, Aaron, Brooks, Mollie Elizabeth, Clarke, Maurice W., Davies, Julie Olivia, De Oliveira, Jose, Egan, Afra, Finke, Annegret, Farrell, Edward D., Gras, Michael, Haase, Stefanie, Henriksen, Ole, Hintzen, Niels, Huwer, Bastian, Homrum, Eydna í, Johnsen, Espen, Kenyon, Susan, Kloppmann, Matthias, Kotterba, Paul, Kvamme, Cecilie, Loots, Christophe, Mackinson, Steve, Lusseau, Susan Mærsk, Marchal, Paul, Albertsen, Christoffer Moesgaard, Mosegaard, Henrik, Moore, Claire, Nash, Richard, Needle, Coby, Nolan, Cormac, O'Connell, Steven, O'Malley, Michael, Ourens, Rosana, Pert, Campbell, Polte, Patrick, Prista, Nuno, Sparrevohn, Claus Reedtz, Regnier, Thomas, Ribeiro, Joseph, Rindorf, Anna, Rohlf, Norbert, Jacobsen, Nis Sand, Schuchert, Pia, Trijoulet, Vanessa, van Deurs, Mikael Seehusen Kruchov, Vandamme, Cindy, Vatnehol, Sindre, and Berg, Casper Willestofte

Abstract

The ICES herring assessment working group (HAWG) met in Aberdeen, Scotland from 12-21 March 2024 to assess the state of six herring (Clupea harengus) and one sprat (Sprattus sprattus) stock. Additionally, HAWG provided advice for eight Sandeel (Ammodytes spp.) in January 2023. The working group conducted update category 1 assessments for four of the herring stocks and category 3 assessments for 2 herring stocks. An analytical assessment was performed for the combined North Sea and Division 3.a sprat, and data limited assessment (ICES category 3) was conducted for English Channel sprat (spr.27.7de). Biennial advice is given for sprat in the Celtic Seas and West of Scotland with advice provided in 2023.

Published
2024

5. A wolf in sheep's clothing: Planktivorous Atlantic herring preys on demersal fishes in coastal waters.

Author

Kotterba, Paul, Moll, Dorothee, Winkler, Helmut, Finke, Annegret, and Polte, Patrick

Subjects
MARINE fishes, FISHERIES, ATLANTIC herring, FORAGE fishes, FISH as food, PREDATION, AMPHIPODA
Abstract

This article discusses the feeding behavior of Atlantic herring in coastal waters, specifically in Greifswald Bay in the Baltic Sea. The researchers found that adult herring caught in the fall had unexpectedly consumed demersal fishes and large invertebrates, rather than the expected zooplankton. This behavior was consistent over multiple years of sampling. In contrast, herring stomachs in the spring were mostly empty. The study highlights the importance of considering the feeding traits of marine fish in population models and the need for more holistic approaches in food web science. [Extracted from the article]

Published
2024
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6. A staging system for Atlantic herring (Clupea harengus) larvae based on external morphology and skeletal development

Author

Fischbach, Vivian, Finke, Annegret, Moritz, Timo, Polte, Patrick, Thieme, Philipp, Fischbach, Vivian, Finke, Annegret, Moritz, Timo, Polte, Patrick, and Thieme, Philipp

Abstract

Atlantic herring (Clupea harengus) plays a key role within temperate marine food webs and is targeted by a significant over-regional fishery. Due to its high economic importance, dynamics in herring stock biomass and recruitment are closely monitored, forming the basis for fisheries management advice. As recruitment patterns translate into the adult stock biomass, early life stage ecology has been thoroughly addressed in fisheries research. Larval monitoring programs commonly focus on length measurements and abundance indices, rarely, information on larval developmental stages is given. As length is highly influenced by temperature, salinity and food availability, their size range can significantly vary between cohorts, populations, and ecotypes. Nowadays, a systematic staging system from the 1970s provides the standard guide for herring larval development, although it does not fully resolve important developmental stages. Here, we propose an improved staging system based on external morphology and skeletal development of herring larvae. The staging system has been developed and tested with herring larvae from different populations of the North and Baltic Sea to ensure applicability. The system comprises 15 stages (+substages) in 5 major developmental phases: the yolk sac phase, the dorsal fin development, the caudal fin development, the pelvic fin development, and the juvenile phase. This staging system aims to simplify herring larval staging to gain a more specific picture of early life dynamics. Because of the detailed description of the development, future studies are better equipped to identify stages which, for example, show high mortality rates and better link them to environmental circumstances.

Published
2023
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8. Caught in the middle: bottom-up and top-down processes impacting recruitment in a small pelagic fish

Author

Moyano, Marta, primary, Illing, Björn, additional, Akimova, Anna, additional, Alter, Katharina, additional, Bartolino, Valerio, additional, Börner, Gregor, additional, Clemmesen, Catriona, additional, Finke, Annegret, additional, Gröhsler, Tomas, additional, Kotterba, Paul, additional, Livdane, Lina, additional, Mittermayer, Felix, additional, Moll, Dorothee, additional, von Nordheim, Lena, additional, Peck, Myron A., additional, Schaber, Matthias, additional, and Polte, Patrick, additional

Published
2022
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9. Herring Assessment Working Group for the area South of 62 N (HAWG)

Author

Ball, Johnathan, Bartolino, Valerio, Bekkevold, D., Berg, F., Bergès, B.J.P., Brazier, Aaron, Campbell, Neill, Van Deurs, Mikael, Egan, Afra, Farrell, Edward D., Finke, Annegret, Griffiths, Christopher, Gröhsler, Tomas, Håkansson, Kirsten Birch, Henriksen, Ole, Huwer, B., Johnsen, Espen, Kloppmann, Matthias, Kvamme, Cecilie, Lundy, Mathieu, Lusseau, S.M., Mackinson, Steven, Marchal, Paul, McLeod, Eleanor, Mosegaard, H., Nash, Richard D.M., Nolan, C., Pastoors, Martin, Pert, Campbell, Regnier, Thomas, Rindorf, Anna, Rohlf, N., Sparrevohn, C.R., Trijoulet, V., Ball, Johnathan, Bartolino, Valerio, Bekkevold, D., Berg, F., Bergès, B.J.P., Brazier, Aaron, Campbell, Neill, Van Deurs, Mikael, Egan, Afra, Farrell, Edward D., Finke, Annegret, Griffiths, Christopher, Gröhsler, Tomas, Håkansson, Kirsten Birch, Henriksen, Ole, Huwer, B., Johnsen, Espen, Kloppmann, Matthias, Kvamme, Cecilie, Lundy, Mathieu, Lusseau, S.M., Mackinson, Steven, Marchal, Paul, McLeod, Eleanor, Mosegaard, H., Nash, Richard D.M., Nolan, C., Pastoors, Martin, Pert, Campbell, Regnier, Thomas, Rindorf, Anna, Rohlf, N., Sparrevohn, C.R., and Trijoulet, V.

Published
2022

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