Juvenile fish habitat across the inner Danish waters: Habitat association models and habitat growth models for European plaice, flounder and common sole informed by a targeted survey

Brown, Elliot John; Kokkalis, Alexandros; Støttrup, Josianne

doi:10.1016/j.seares.2019.101795

Cited by 5 publications

(2 citation statements)

References 122 publications

(159 reference statements)

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“…Regular monitoring of juvenile habitats to provide data for assessment can generate spatially-explicit evidence for local productive areas to inform environmental management. Surveys can provide information on juvenile responses to both environmental drivers (Hermant et al, 2010;Caputi et al, 2014;Lagarde et al, 2018;Brown et al, 2019) and anthropogenic pressures (Rochette et al, 2010;Archambault et al, 2018), which can influence future stock dynamics (Stige et al, 2013). Habitat degradation can result in either overly optimistic or overly conservative assessments of stock status (Brown et al, 2018b).…”

Section: Discussionmentioning

confidence: 99%

The use and performance of survey-based pre-recruit abundance indices for possible inclusion in stock assessments of coastal-dependent species

Pape

Vermard

Guitton

et al. 2020

ICES Journal of Marine Science

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We reviewed the use of survey-based pre-recruit abundance indices in short-term recruitment forecasts for fish species relying on coastal habitats at the juvenile stage and that are assessed by ICES. We collated information from stock assessment reports and from a questionnaire filled out by the stock assessors. Among the 78 stocks with juvenile coastal dependence, 49 use short-term forecasts in stock assessment. Survey-based pre-recruit abundance indices were available for 35 of these stocks, but only 14 were used to forecast recruitment. The questionnaire indicated that the limited use of survey-based pre-recruit abundance indices was primarily due to sampling inefficiency, which may preclude reliable recruitment estimates. The sampling is inefficient because the juvenile coastal distribution is outside the geographical area covered by large-scale surveys or targeted coastal surveys are conducted on limited spatial and temporal scales. However, our analysis of the relationship between survey-based pre-recruit indices and assessment-generated recruitment indices revealed that survey-based pre-recruit abundance indices were sufficiently accurate to provide useful information for predicting future recruitment. We recommend expansion of the use of survey-based indices of pre-recruit abundance in stock assessment and recruitment forecasting, and consideration of how to include juveniles in ongoing and future surveys.

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Section: Discussionmentioning

confidence: 99%

The use and performance of survey-based pre-recruit abundance indices for possible inclusion in stock assessments of coastal-dependent species

Pape

Vermard

Guitton

et al. 2020

ICES Journal of Marine Science

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“…To assess community composition, Jaccard distances (Jaccard, 1901;Tanimoto, 1957) were calculated and ordinated in three dimensions ordinated in three dimensions, but presented ordinates in pairs as two dimensional plots using non-metric multidimensional scaling (NMDS) with the vegdist function. The analyses were computed separately for each dataset (eDNA and Fish Atlas) and sampling sites were grouped into eight sub-areas (North Sea, Limfjord, Kattegat, Samso Belt, Great Belt, Little Belt, Baltic Sea and The Sound), based on geographical distribution (Teilmann et al, 2008;Brown et al, 2019; see Figure 1). To evaluate the effect of sub-areas and datasets, Jaccard dissimilarity matrices were tested for multivariate analysis of variance (PERMANOVAadonis function) and homogeneity of variance (PERMDISP2betadisper function) with bias adjustment for different sample sizes, both using 999 permutations.…”

Section: Community Composition Analysismentioning

confidence: 99%

A National Scale “BioBlitz” Using Citizen Science and eDNA Metabarcoding for Monitoring Coastal Marine Fish

et al. 2022

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Marine biodiversity is threatened by human activities. To understand the changes happening in aquatic ecosystems and to inform management, detailed, synoptic monitoring of biodiversity across large spatial extents is needed. Such monitoring is challenging due to the time, cost, and specialized skills that this typically requires. In an unprecedented study, we combined citizen science with eDNA metabarcoding to map coastal fish biodiversity at a national scale. We engaged 360 citizen scientists to collect filtered seawater samples from 100 sites across Denmark over two seasons (1 p.m. on September 29th 2019 and May 10th 2020), and by sampling at nearly the exact same time across all 100 sites, we obtained an overview of fish biodiversity largely unaffected by temporal variation. This would have been logistically impossible for the involved scientists without the help of volunteers. We obtained a high return rate of 94% of the samples, and a total richness of 52 fish species, representing approximately 80% of coastal Danish fish species and approximately 25% of all Danish marine fish species. We retrieved distribution patterns matching known occurrence for both invasive, endangered, and cryptic species, and detected seasonal variation in accordance with known phenology. Dissimilarity of eDNA community compositions increased with distance between sites. Importantly, comparing our eDNA data with National Fish Atlas data (the latter compiled from a century of observations) we found positive correlation between species richness values and a congruent pattern of community compositions. These findings support the use of eDNA-based citizen science to detect patterns in biodiversity, and our approach is readily scalable to other countries, or even regional and global scales. We argue that future large-scale biomonitoring will benefit from using citizen science combined with emerging eDNA technology, and that such an approach will be important for data-driven biodiversity management and conservation.

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Using acoustic telemetry to locate flatfish spawning areas: Estuarine migrations of turbot Scophthalmus maximus and European flounder Platichthys flesus

Baden

Christoffersen

Flávio

et al. 2022

Journal of Sea Research

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Juvenile fish habitat across the inner Danish waters: Habitat association models and habitat growth models for European plaice, flounder and common sole informed by a targeted survey

Cited by 5 publications

References 122 publications

The use and performance of survey-based pre-recruit abundance indices for possible inclusion in stock assessments of coastal-dependent species

The use and performance of survey-based pre-recruit abundance indices for possible inclusion in stock assessments of coastal-dependent species

A National Scale “BioBlitz” Using Citizen Science and eDNA Metabarcoding for Monitoring Coastal Marine Fish

Using acoustic telemetry to locate flatfish spawning areas: Estuarine migrations of turbot Scophthalmus maximus and European flounder Platichthys flesus

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