Spring migration of Atlantic mackerel, Scomber scombrus, in relation to water temperature through Cabot Strait (Gulf of St. Lawrence)

D'Amours, Denis; Castonguay, Martin

doi:10.1007/bf00004743

Cited by 14 publications

(6 citation statements)

References 9 publications

(8 reference statements)

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“…Prey availability also varies throughout the year, as is well documented in the GSL. Mackerel arrive in the GSL in late May and early June (Sette, 1950;D'Amours and Castonguay, 1992) and remain until October (McKay, 1979), whereas herring congregate to spawn in the spring, before the Atlantic bluefin tuna have arrived, and in the Autumn from August to the end of September (Messieh, 1987). The presence of gravid herring in the samples from Port Hood confirms that the Atlantic bluefin tuna in the GSL were feeding on the aggregations of Autumn spawners during sampling.…”

Section: U N I D E N T I F I E D S Q U I D L E P T a S T E R I A S T mentioning

confidence: 85%

Atlantic Bluefin Tuna (Thunnus thynnus) Diet in the Gulf of St. Lawrence and on the Eastern Scotian Shelf

Pleizier¹,

Campana²,

Schallert³

et al. 2012

J. Northw. Atl. Fish. Sci.

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The stomach contents of 68 Atlantic bluefin tuna (Thunnus thynnus) landed in Port Hood and Canso, Nova Scotia, in 2010, were analyzed to characterize the diet of bluefin tuna at the two locations. Of the sampled fish, 54 stomachs had contents. Pelagic schooling fish such as herring (Clupea harengus) and mackerel (Scomber scombrus) dominated the diets in both regions. However, a number of rare species, including demersal species, were also observed. Despite the difference in location and the significantly larger size of the Atlantic bluefin tuna landed in Port Hood, the diets of the Atlantic bluefin tuna landed at both sites were similar.

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Section: U N I D E N T I F I E D S Q U I D L E P T a S T E R I A S T mentioning

confidence: 85%

Atlantic Bluefin Tuna (Thunnus thynnus) Diet in the Gulf of St. Lawrence and on the Eastern Scotian Shelf

Pleizier¹,

Campana²,

Schallert³

et al. 2012

J. Northw. Atl. Fish. Sci.

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“…High presence–absence and given‐presence of mackerel DEP were associated with similar temperature range (approximately 10.5–16 and 10–16.5°C for PA and GP models respectively; Figures and). This dome‐shaped relationship linking both DEP presence–absence and given‐presence to temperature in our models suggests an optimal thermal window potentially driven by constraints linked to embryo development (Nwosu & Holzlöhner, ; Sapkale, Singh, & Desai, ) and the influence of temperature on adult mackerel distribution, migration and timing of spawning (D’Amours & Castonguay, ; Jansen & Gislason, ; Overholtz et al, ). The range of temperature (10–16.5°C) associated with mackerel DEP, with an optimum around 13–14°C (Figures and), is consistent with those described in models for the north‐east Atlantic mackerel (Bruge et al, ; Brunel, Damme, Samson, & Dickey‐Collas, ) and studies using egg survey data for the north‐west Atlantic mackerel stock (Studholme et al, ).…”

Section: Discussionmentioning

confidence: 62%

“…These variables were sea surface and averaged‐50m of temperature (SST and T0_50, respectively) and salinity (SSS and S0_50, respectively). SST and T0_50 were selected as water temperature influences Atlantic mackerel migration and timing of spawning (D’Amours & Castonguay, ; Radlinski et al, ). Although salinity is not or barely mentioned in studies of mackerel spawning habitat and larvae distribution (e.g.…”

Section: Methodsmentioning

confidence: 99%

Modelling Atlantic mackerel spawning habitat suitability and its future distribution in the north‐west Atlantic

Mbaye

Doniol‐Valcroze

Brosset

et al. 2019

Fisheries Oceanography

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We investigated the effect of environmental conditions on Atlantic mackerel spawning habitat in the southern Gulf of St. Lawrence (sGSL). Based on generalized additive models, we (i) modelled the optimal spawning habitat of mackerel in the sGSL using daily egg production (DEP) in June, (ii) predicted known and new potential present spawning habitats in the GSL and the north‐west Atlantic, and (iii) assessed how they respond to future climate change. Our findings showed that both mackerel presence–absence and given‐presence DEP were associated with sea surface temperature (10–16.5°C), salinity above 31 and depth < 120 m. Adding zooplankton showed a marked effect on the DEP given‐presence compared to the presence–absence. Predictions of spawning habitats under present (1999–2012) and future scenario (2066–2085) conditions were estimated from the presence–absence model without zooplankton, using physical conditions of the BNAM. Under present conditions, our model predicted well the main spawning habitat in the sGSL and other known secondary spawning habitats in the northern GSL (nGSL), the western and southern Newfoundland, and the north‐west Atlantic coast. Under future conditions, our study suggests that spawning habitats in the sGSL and the nGSL would expand. Our results, therefore, suggest that mackerel could benefit from a warmer GSL, minimizing the potential for a northward migration of the stock due to decreasing suitability of the sGSL as its main spawning ground, and a new but spatially limited potential habitat in Newfoundland coasts. These results can be used to inform stock management and develop adaptive management plans in the context of climate change.

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“…Sampling. Mackerel enter the southern Gulf of St. Lawrence (sGSL, Eastern Canada) in early June each year to spawn, after overwintering along the north-eastern US continental shelf (from Sable Island to the Mid-Atlantic Bight 29,30 ). Each year, Fisheries and Oceans Canada (DFO) conducts a 2-week long mackerel egg survey in the sGSL (a 65-station fixed grid 20 nautical miles apart spanning the dominant mackerel Conceptual framework of the pathway from spawners to recruits and the underlying mechanisms investigated (stock demographic structure and environmental conditions in red and green, respectively).…”

Section: Methodsmentioning

confidence: 99%

A fine-scale multi-step approach to understand fish recruitment variability

Brosset

Smith

Plourde

et al. 2020

Sci Rep

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Recruitment is one of the dominant processes regulating fish population productivity. It is, however, notoriously difficult to predict, as it is the result of a complex multi-step process. Various fine-scale drivers might act on the pathway from adult population characteristics to spawning behaviour and egg production, and then to recruitment. Here, we provide a holistic analysis of the Northwest Atlantic mackerel recruitment process from 1982 to 2017 and exemplify why broad-scale recruitment–environment relationships could become unstable over time. Various demographic and environmental drivers had a synergetic effect on recruitment, but larval survival through a spatio-temporal match with prey was shown to be the key process. Recruitment was also mediated by maternal effects and a parent–offspring fitness trade-off due to the different feeding regimes of adults and larvae. A mismatch curtails the effects of high larval prey densities, so that despite the abundance of food in recent years, recruitment was relatively low and the pre-existing relationship with overall prey abundance broke down. Our results reaffirm major recruitment hypotheses and demonstrate the importance of fine-scale processes along the recruitment pathway, helping to improve recruitment predictions and potentially fisheries management.

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Spring migration of Atlantic mackerel, Scomber scombrus, in relation to water temperature through Cabot Strait (Gulf of St. Lawrence)

Cited by 14 publications

References 9 publications

Atlantic Bluefin Tuna (Thunnus thynnus) Diet in the Gulf of St. Lawrence and on the Eastern Scotian Shelf

Atlantic Bluefin Tuna (Thunnus thynnus) Diet in the Gulf of St. Lawrence and on the Eastern Scotian Shelf

Modelling Atlantic mackerel spawning habitat suitability and its future distribution in the north‐west Atlantic

A fine-scale multi-step approach to understand fish recruitment variability

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