Quantitative molecular detection of larval Atlantic herring (Clupea harengus) in stomach contents of Atlantic mackerel (Scomber scombrus) marks regions of predation pressure

Abstract Mortality rates in the early life-history stages of fishes are generally high yet identifying the causes remain unclear. Faltering recruitment rates of Atlantic herring (Clupea harengus) in the Norwegian Sea indicate a need to identify which mortality factors influence larval herring surviv...

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Autores principales:	Bridie Jean Marie Allan, Jessica Louise Ray, Maik Tiedemann, Valeriya Komyakova, Frode Vikebø, Katrine Sandnes Skaar, Martina H. Stiasny, Arild Folkvord, Richard D. M. Nash, Erling Kåre Stenevik, Olav Sigurd Kjesbu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/09cb3e548a844dcb9e4c8a059d800cf0
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spelling	oai:doaj.org-article:09cb3e548a844dcb9e4c8a059d800cf02021-12-02T13:33:52ZQuantitative molecular detection of larval Atlantic herring (Clupea harengus) in stomach contents of Atlantic mackerel (Scomber scombrus) marks regions of predation pressure10.1038/s41598-021-84545-72045-2322https://doaj.org/article/09cb3e548a844dcb9e4c8a059d800cf02021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-84545-7https://doaj.org/toc/2045-2322Abstract Mortality rates in the early life-history stages of fishes are generally high yet identifying the causes remain unclear. Faltering recruitment rates of Atlantic herring (Clupea harengus) in the Norwegian Sea indicate a need to identify which mortality factors influence larval herring survival. Previous research suggests that increased predation pressure by Atlantic mackerel (Scomber scombrus) may contribute to the disconnect between spawning stock biomass and recruitment. To quantify the contribution of predation pressure by Atlantic mackerel to herring larval mortality, two research cruises were conducted within a probable “hot spot” (67–72° N) for intensified mackerel predation based on particle drift simulations. Mackerel stomach contents were analysed for herring larvae content using droplet digital polymerase chain reaction (ddPCR) with a quantitative molecular detection assay specific for herring. The ddPCR results demonstrate clear predation by mackerel on herring larvae and also suggest that the alternative use of visual examination may give misleading results. Our results show that mackerel should be considered a potentially important predator on herring larvae. The quantitative molecular assay presented here shows great promise as an efficient and specific tool to correctly identify and quantify predation pressure on early life-history stages of fishes.Bridie Jean Marie AllanJessica Louise RayMaik TiedemannValeriya KomyakovaFrode VikebøKatrine Sandnes SkaarMartina H. StiasnyArild FolkvordRichard D. M. NashErling Kåre StenevikOlav Sigurd KjesbuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Bridie Jean Marie Allan Jessica Louise Ray Maik Tiedemann Valeriya Komyakova Frode Vikebø Katrine Sandnes Skaar Martina H. Stiasny Arild Folkvord Richard D. M. Nash Erling Kåre Stenevik Olav Sigurd Kjesbu Quantitative molecular detection of larval Atlantic herring (Clupea harengus) in stomach contents of Atlantic mackerel (Scomber scombrus) marks regions of predation pressure
description	Abstract Mortality rates in the early life-history stages of fishes are generally high yet identifying the causes remain unclear. Faltering recruitment rates of Atlantic herring (Clupea harengus) in the Norwegian Sea indicate a need to identify which mortality factors influence larval herring survival. Previous research suggests that increased predation pressure by Atlantic mackerel (Scomber scombrus) may contribute to the disconnect between spawning stock biomass and recruitment. To quantify the contribution of predation pressure by Atlantic mackerel to herring larval mortality, two research cruises were conducted within a probable “hot spot” (67–72° N) for intensified mackerel predation based on particle drift simulations. Mackerel stomach contents were analysed for herring larvae content using droplet digital polymerase chain reaction (ddPCR) with a quantitative molecular detection assay specific for herring. The ddPCR results demonstrate clear predation by mackerel on herring larvae and also suggest that the alternative use of visual examination may give misleading results. Our results show that mackerel should be considered a potentially important predator on herring larvae. The quantitative molecular assay presented here shows great promise as an efficient and specific tool to correctly identify and quantify predation pressure on early life-history stages of fishes.
format	article
author	Bridie Jean Marie Allan Jessica Louise Ray Maik Tiedemann Valeriya Komyakova Frode Vikebø Katrine Sandnes Skaar Martina H. Stiasny Arild Folkvord Richard D. M. Nash Erling Kåre Stenevik Olav Sigurd Kjesbu
author_facet	Bridie Jean Marie Allan Jessica Louise Ray Maik Tiedemann Valeriya Komyakova Frode Vikebø Katrine Sandnes Skaar Martina H. Stiasny Arild Folkvord Richard D. M. Nash Erling Kåre Stenevik Olav Sigurd Kjesbu
author_sort	Bridie Jean Marie Allan
title	Quantitative molecular detection of larval Atlantic herring (Clupea harengus) in stomach contents of Atlantic mackerel (Scomber scombrus) marks regions of predation pressure
title_short	Quantitative molecular detection of larval Atlantic herring (Clupea harengus) in stomach contents of Atlantic mackerel (Scomber scombrus) marks regions of predation pressure
title_full	Quantitative molecular detection of larval Atlantic herring (Clupea harengus) in stomach contents of Atlantic mackerel (Scomber scombrus) marks regions of predation pressure
title_fullStr	Quantitative molecular detection of larval Atlantic herring (Clupea harengus) in stomach contents of Atlantic mackerel (Scomber scombrus) marks regions of predation pressure
title_full_unstemmed	Quantitative molecular detection of larval Atlantic herring (Clupea harengus) in stomach contents of Atlantic mackerel (Scomber scombrus) marks regions of predation pressure
title_sort	quantitative molecular detection of larval atlantic herring (clupea harengus) in stomach contents of atlantic mackerel (scomber scombrus) marks regions of predation pressure
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/09cb3e548a844dcb9e4c8a059d800cf0
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Quantitative molecular detection of larval Atlantic herring (Clupea harengus) in stomach contents of Atlantic mackerel (Scomber scombrus) marks regions of predation pressure

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