Relations between Egg Production, Larval Production and Spawning Stock Size in Clyde Herring

Saville, Adrian; Baxter, Ian; McKay, D. W.

doi:10.1007/978-3-642-65852-5_10

Cited by 5 publications

(3 citation statements)

References 5 publications

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“…If strong density-dependence was occurring in the egg phase this would be manifested in low larvae productions. Whist lowered larvae productions at high stock sizes were seen in the Clyde (Saville et al, 1974) they were not noted in the small Blackwater herring stock (Fox, 2001) nor in the current analysis of the North Sea herring stock.…”

Section: Discussionmentioning

confidence: 61%

Stock and recruitment in North Sea herring (Clupea harengus); compensation and depensation in the population dynamics

2009

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Section: Discussionmentioning

confidence: 61%

Stock and recruitment in North Sea herring (Clupea harengus); compensation and depensation in the population dynamics

2009

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“…The identification of the spawning areas as well as the understanding of mechanisms underlying the spatial distribution and abundance of larval taxa are essential components for the development of management plans aimed at the conservation of marine ecosystems and fishery resources. In this context, the abundance of larval taxa can be considered an useful proxy for the status of adult fish populations, being a function of the spawning stock size as well as fecundity, recruitment and mortality during early life history (Saville, 1981;Hsieh et al, 2005;Koslow & Davison, 2015). However, further studies are necessary in order to extend the knowledge about the mechanisms governing the structure of the larval fish assemblages also on a broader temporal scale.…”

Section: Structure and Spatial Distribution Patterns Of The Larval As...mentioning

confidence: 99%

Linking surface hydrodynamics to planktonic ecosystem: the case study of the ichthyoplanktonic assemblages in the Central Mediterranean Sea

et al. 2017

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Oceanographic processes play a key role in influencing the structure of the marine planktonic ecosystems. Taking advantage of the quasi-simultaneous collection of a large ichthyoplanktonic dataset in different regions of the Central Mediterranean Sea (Italian/Maltese, Tunisian and Libyan waters), this study aimed at the identification of the main environmental drivers that control the structure of the larval fish assemblages. Spatial distribution and taxa composition were related to physical forcings (geostrophic currents and wind stress) and environmental conditions (bottom depth, temperature, salinity, chlorophyll-a concentration). ANOSIM and SIMPER identified contribution of fish taxa to the average Bray-Curtis dissimilarity among regions. In Italian and Libyan waters, two assemblages (neritic and oceanic) were identified, while a mixed assemblage characterized only some stations. Two neritic and one oceanic assemblages were discriminated in Tunisian waters. Random Forest classification model highlighted the essential role of the bathymetry, while Lagrangian simulations evidenced the action of the hydrodynamics in mixing neritic and oceanic assemblages in the Italian/Maltese and partially in Libyan waters. These findings highlighted the importance of the multidisciplinary approach and shed light on the potential value of the ichthyoplanktonic surveys for the assessment of the state of the marine ecosystem and the conservation of the fishery resources.

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“…As stated previously by many authors (e.g., Postuma et al 1975;Rankine 1986;Bauer et al 2014), the only way to identify a herring spawning bed is by observing or sampling spawn in situ on the seabed. However, such direct observations are scarce in British waters, outside the few well-known spawning grounds in the Firth of Clyde, Scotland (Ewart 1884;Marshall et al 1937;Parrish et al 1959;Saville et al 1974;Stratoudakis et al 1998), the Black Water Estuary, England (Dempsey and Bamber 1983), the Irish Sea (Bowers 1969), and the English Channel (Bolster and Bridger 1957), as well as the recent spawning events in Wester Ross filmed by local scallop divers and the BBC. Other notable examples of herring spawn sampled from the seabed in the Northeast Atlantic are from the Baltic Sea (Aneer 1985(Aneer , 1989Kääriä et al 1997;Moll et al 2018), Norway (Runnström 1941;Axelsen et al 2000;Skaret et al 2003;Slotte 2017), andIceland (Fridriksson andTimmermann 1951).…”

Section: Spawning Ground Identificationmentioning

confidence: 99%

Essential spawning grounds of Scottish herring: current knowledge and future challenges

Frost

Diele

2022

Rev Fish Biol Fisheries

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Scotland once had the largest herring fishery globally, generating local income, identity, and societal change. Following historic stock collapse, in spring 2018/2019 large herring shoals were observed on the west coast for the first time in decades, at a formerly important spawning ground. This highlights the urgency of maintaining historic (and contemporary) benthic spawning habitat, which these fish rely upon, in good condition. However, information on exact location, characteristics, and status of historic and contemporary spawning grounds, if existing, is not easily accessible. We searched over 1190 literature sources, dating back to 1884, using scientific databases and web-based searches, and ran a query for automated search of comprehensive historic reports. We present current knowledge on Scottish herring spawning grounds, retrieved through these searches and fisher interviews, maps showing historic and contemporary spawning grounds, and discuss challenges arising from the methods used to recognize these grounds. Knowledge gaps regarding location and environmental status of past and current spawning grounds, particularly relevant for Scotland’s west coast, are identified. Based on the importance of specific environmental and physical variables for herring reproductive success, we advocate the inclusion of essential spawning grounds into herring management plans. This will require additional data on spawning grounds, including historic local ecological knowledge rarely considered. An inclusive ecosystem-based approach to herring management would allow more targeted actions to conserve (and potentially restore) essential spawning habitat. More effective management strategies will also call for reversing the (global) issue of the disconnect between different stakeholder groups. Graphical abstract

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Relations between Egg Production, Larval Production and Spawning Stock Size in Clyde Herring

Cited by 5 publications

References 5 publications

Stock and recruitment in North Sea herring (Clupea harengus); compensation and depensation in the population dynamics

Stock and recruitment in North Sea herring (Clupea harengus); compensation and depensation in the population dynamics

Linking surface hydrodynamics to planktonic ecosystem: the case study of the ichthyoplanktonic assemblages in the Central Mediterranean Sea

Essential spawning grounds of Scottish herring: current knowledge and future challenges

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