Demersal groundfish assemblages and depth-related trends on Flemish Cap (NAFO division 3M): 2004–2013

Nogueira, Adriana; Paz, X.; González-Troncoso, D.M.

doi:10.1016/j.fishres.2016.08.016

Cited by 4 publications

(1 citation statement)

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“…Consequently, the vertical and horizontal distances to available prey may influence the depth selection of the species. Further, competition between species and predation may influence the depth of occurrence as demonstrated by Nogueira et al (2017): Greenland halibut occurred shallower than previously after the collapse of the Atlantic cod population in Flemish Cap in the 1990s and shifted back to deeper waters once the cod population began to recover, potentially in response to cod predation. Greenland halibut eggs and larvae are pelagic for months and can be carried large distances by prevailing currents along the continental slopes (Sohn et al, 2010;Domı ´nguez-Petit et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

Pan-Arctic suitable habitat model for Greenland halibut

Vihtakari

Hordoir

Treble

et al. 2021

ICES Journal of Marine Science

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Deep-sea marine fishes support important fisheries but estimates of their distributions are often incomplete as the data behind them may reflect fishing practices, access rights, or political boundaries, rather than actual geographic distributions. We use a simple suitable habitat model based on bottom depth, temperature, and salinity to estimate the potential distribution of Greenland halibut (Reinhardtius hippoglossoides). A large presence-only dataset is examined using multivariate kernel densities to define environmental envelopes, which we link to spatial distribution using a pan-Arctic oceanographic model. Occurrences generally fit the model well, although there were gaps in the predicted circum-Arctic distribution likely due to limited survey activity in many of the ice-covered seas around the Arctic Ocean. Bottom temperature and depth were major factors defining model fit to observations, but other factors, such as ecosystem interactions and larval drift could also influence distribution. Model predictions can be tested by increasing sampling effort in poorly explored regions and by studying the connectivity of putative populations. While abundances of Greenland halibut in the High Arctic are currently low, some areas are predicted to be suitable habitat for this species, suggesting that on-going sea-ice melt may lead to fisheries expansion into new areas.

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Section: Discussionmentioning

confidence: 99%

Pan-Arctic suitable habitat model for Greenland halibut

Vihtakari

Hordoir

Treble

et al. 2021

ICES Journal of Marine Science

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Could population and community indicators contribute to identify the driver factors and describe the dynamic in the Flemish Cap demersal assemblages?

et al. 2018

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Flemish Cap is an isolated fishing ground located in the international waters of the Northwest Atlantic Fisheries Organization area (NAFO). In the last decades, the Flemish Cap demersal community has been subjected to strong and variable fishing intensities affecting different stocks over time. In this work, three ecological indices for individual populations (abundance, biomass, and intrinsic population rate of growth) and five community indicators (total abundance and biomass, community synchrony, ABC curves and proportion of noncommercial/commercial species) have been applied to data of 29 fish and 1 shrimp species to analyse the dynamics of the whole ecosystem and the major demersal fish assemblages. Different periods were detected, which may be explained by differences in the exploitation patterns and pressure for different stocks, prey-predators relationships and other environmental drivers affecting the reproductive capacity. This study shows that the selected ecosystem indicators are appropriate to detect changes in the demersal community of Flemish Cap in response to fishing, predation and variability in recruitment success. It has been also demonstrated that analyses revealed different trends for different parts of the community during periods with different fishing pressure. This knowledge could be useful to support management policies.

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