Cross-shelf processes north of Scotland in relation to the southerly migration of Western mackerel

Reid, David G.; Turrell, W.R.; Walsh, Martin; Corten, A.

doi:10.1006/jmsc.1996.0202

Cited by 43 publications

(37 citation statements)

References 10 publications

(16 reference statements)

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“…The association between Tursiops truncatus and S. scombrus may only be a circumstantial association. Indeed, S. scombrus use the shelf break as a migratory pathway between the Bay of Biscay and the Celtic Sea (Reid et al 1997, Uriarte & Lucio 2001 and both their occurrence and abundance in the Bay of Biscay in spring therefore depend on the timing of their migration. Furthermore, S. scombrus only marginally occur in the diet of Tursiops truncatus, compared to Trachurus trachurus (Spitz et al 2006).…”

Section: Prey-predator Associations In the Bay Of Biscaymentioning

confidence: 99%

Investigating the coupling between small pelagic fish and marine top predators using data collected from ecosystem-based surveys

Certain¹,

Massé²,

Canneyt³

et al. 2011

Mar. Ecol. Prog. Ser.

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The present study is a general multivariate analysis of the spatial association between small pelagic fishes and their predators (seabirds, marine mammals and fisheries), using 6 yr (18 000 km) of transects surveyed in spring in the Bay of Biscay, France. We describe 4 groups of prey-predator association, with explicit distinction of prey size: (1) terns and anchovies (10 to 15 cm), (2) common dolphins, common murres, sprat and sardine (< 20 cm), (3) gannets, horse mackerel and mackerel (15 to 25 cm) and (4) bottlenose dolphin, horse mackerel and mackerel (25 to 40 cm). Our analysis also illustrates the great variability in these associations, with years of strong prey-predator associations followed by years of weak relationships. The analysis allows us to formulate predictions about the structure of the upper-pelagic food web in the Bay of Biscay in spring, and constitutes a good starting point for the analysis of data collected during ecosystem-based surveys in the Bay of Biscay. KEY WORDS: Marine top predators · Small pelagic fishes · Spatial associations · Temporal variability · Pelagic ecosystem · Bay of Biscay Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 422: [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39] 2011 death (Ellis & Gabrielsen 2001). However, small pelagic fishes are mobile, clustered and unpredictable prey (Haugland & Misund 2004, Weimerskirch 2007. To cope with the high uncertainty associated with prey distribution and abundance, marine top predators have developed complex foraging strategies, based on optimal foraging paths in a heterogeneous environment (Russell et al. 1992, Viswanathan et al. 1996, Fauchald 1999, Pinaud & Weimerskirch 2005, Benhamou 2007, combined with an extensive use of socially shared information and cues (Davoren et al. 2003, Silverman et al. 2004.Top predator populations may also have an important role in marine ecosystems and examples exist of their perceived pivotal role. Sissenwine et al. (1984) hypothesised that the final collapse of the Georges Bank herring population was due to the presence of fin whales Balaenoptera physalus on the spawning grounds used by the remaining herring, after the stock had been seriously depleted by overfishing. Kenney et al. (1997) estimated that the total amount of fish and squid consumed by marine mammals exceeded fisheries catch in the USA Northeast Continental Shelf ecosystem. Although marine top predators are supposed to be primarily controlled by bottom-up processes, their selective removal in chronically overfished systems can also affect the stability of ecological communities (Bascompte et al. 2005, Myers et al. 2007. In fact, the relative importance of bottom-up versus top-down regulation in open-sea ecosystems is probably a matter of scale, with bottom-up processes evident at large spatial scale, and top-down processes becoming more important at smaller spatial scales (Hunt & McKinnel 2006). Many species of marine top predators (e.g. cetacean...

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Section: Prey-predator Associations In the Bay Of Biscaymentioning

confidence: 99%

Investigating the coupling between small pelagic fish and marine top predators using data collected from ecosystem-based surveys

Certain¹,

Massé²,

Canneyt³

et al. 2011

Mar. Ecol. Prog. Ser.

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“…In particular, we investigated the NorthEast Atlantic mackerel (NEAM) population which spawns from January to July along the continental shelf edge from Portuguese to Scottish waters and in the North Sea (Reid et al, 1997;Villamor et al, 1997;Reid, 2001;Beare and Reid, 2002). After spawning, NEAM migrates toward the North Sea and Norwegian Sea to feed.…”

Section: Introductionmentioning

confidence: 99%

Thermal Niche Tracking and Future Distribution of Atlantic Mackerel Spawning in Response to Ocean Warming

et al. 2016

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North-east Atlantic mackerel spawning distribution has shifted northward in the last three decades probably in response to global sea warming. Yet, uncertainties subsist regarding on the shift rate, causalities, and how this species will respond to future conditions. Using egg surveys, we explored the influence of temperature change on mackerel's spawning distribution (western and southern spawning components of the stock) between 1992 and 2013, and projected how it may change under future climate change scenarios. We developed three generalized additive models (GAMs): (i) a spatiotemporal model to reconstruct the spawning distribution for the north-east Atlantic stock over the period 1992-2013, to estimate the rate of shift; (ii) a thermal habitat model to assess if spawning mackerel have tracked their thermal spawning-niche; and (iii) a niche-based model to project future spawning distribution under two predicted climate change scenarios. Our findings showed that mackerel spawning activity has shifted northward at a rate of 15.9 ± 0.9 km/decade between 1992 and 2013. Similarly, using the thermal habitat model, we detected a northward shift of the thermal spawning-niche. This indicates that mackerel has spawned at higher latitudes to partially tracking their thermal spawning-niche, at a rate of 28.0 ± 9.0 km/ • C of sea warming. Under future scenarios (mid and end of the century), the extrapolation of the niche-based model to coupled hydroclimatic and biogeochemical models indicates that center of gravity of mackerel spawning distribution is expected to shift westward (32 to 117 km) and northward (0.5 to 328 km), but with high variability according to scenarios and time frames. The future of the overall egg production in the area is uncertain (change from −9.3 to 12%). With the aim to allow the fishing industry to anticipate the future distribution of mackerel shoals during the spawning period, future research should focus on reducing uncertainty in projections.

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“…It is possible that the fish migrate north in wintertime and south in summertime, reflecting the seasonal temperature gradient in the North Sea (Beare et al 2002), which is warmer in the far north in winter due to the influence of the North Atlantic current. Mackerel and horse mackerel are known to make lengthy seasonal migrations (Coombs & Mitchell 1981, Reid et al 1997, Iversen et al 1998 and it is possible that anchovy, sardine and red mullet behave similarly. Another possibility is that the fish simply move into the northern North Sea in Quarter 1 via the north coast of Scotland, and into the southern North Sea via the English Channel during Quarter 3.…”

mentioning

confidence: 99%

Long-term increases in prevalence of North Sea fishes having southern biogeographic affinities

Beare¹,

Burns²,

Greig³

et al. 2004

Mar. Ecol. Prog. Ser.

160

113

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Observations made in the scientific and popular literature suggest that the characteristics of both marine and terrestrial ecosystems are changing rapidly due to increasing global air and sea temperatures. Here, we examine the hypothesis that fish species with more 'southern' distributions are increasing in the northern North Sea over time. In order to do this, 2 important databases on fish abundance collected by trawl on research cruises are interrogated. When combined, the databases cover both the entire North Sea and the Scottish west coast and span a period of 80 yr (1925 to 2004). The data take the form of length-frequencies for all species caught (> 300 different species), while additional information (e.g. age, sex, weight and stage of sexual maturity) is available for the commercially important component (e.g. cod). The trawl data suggest that the North Sea is experiencing waves of immigration by exotic, southern species (e.g. red mullet, anchovy and pilchard). The purpose of this paper is to describe and document these changes.KEY WORDS: Anchovy · Sardine · Horse mackerel · Mackerel · Long-term · North Sea · Climate Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 284: [269][270][271][272][273][274][275][276][277][278] 2004 doliolids are connected to unusual incursions of oceanic water caused by changes in the North Atlantic Oscillation (Edwards et al. 1999).Higher than average sea temperatures are correlated with low recruitment of cod at the latitudinal limits of its range (Planque & Frédou 1999, O'Brien et al. 2000. Reid et al. (2001) related abrupt changes in the abundance and composition of the plankton and fish community ca. 1988 to recent increases in the North Sea horse mackerel fishery. Pronounced increases in tropical fish in the Bay of Biscay area have been noted (Quero et al. 1998) by scientists in France, while Swaby & Potts (1999) made the first British record of the sailfin dory Zenopsis conchifer, noting that the species is advancing northwards along the continental shelf west of the British Isles at a rate of 60 km per decade. Other studies show similar patterns. Information on first records of southerly fish species caught in Cornish waters has been collated and published (Stebbing et al. 2002), and nearly 20 completely new species have been recorded (by 2001). The fish species noted include bigeyed tunny Thunnus obesus, sailfin dory Zenopsis conchifer, short-nosed seahorse Hippocampus hippocampus and barracuda Sphyraena sphyraena. In the Irish Sea, the occurrence of the warm-water species, anchovy Engraulis encrasicolus, has increased between 1990 and 1998 according to trawl data from research surveys (Armstrong et al. 1999). British commercial fishermen have also noted change. The spider-crab Maia squinado fishery, for example, is advancing steadily further northwards (Anonymous 2003).In 1996, a paper was published describing the longterm variation in the abundance of southern species in the southern North Sea (Corten & van...

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Cross-shelf processes north of Scotland in relation to the southerly migration of Western mackerel

Cited by 43 publications

References 10 publications

Investigating the coupling between small pelagic fish and marine top predators using data collected from ecosystem-based surveys

Investigating the coupling between small pelagic fish and marine top predators using data collected from ecosystem-based surveys

Thermal Niche Tracking and Future Distribution of Atlantic Mackerel Spawning in Response to Ocean Warming

Long-term increases in prevalence of North Sea fishes having southern biogeographic affinities

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