Movements of lesser sandeels (Ammodytes marinus Raitt) tagged in the northwestern North Sea

Gauld, J. A.

doi:10.1093/icesjms/46.3.229

Cited by 26 publications

(18 citation statements)

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“…In the North Sea, passive transport of larvae between these spawning areas is probably constrained by the frontal zones between freshwaterinfluenced water masses and the shelf water of the central North Sea (Munk et al 2002). As the maximum recorded dispersal of post-settled sandeels is 64 km (Gauld 1990), the geographical isolation of many aggregations reported here is likely to reflect reproductive isolation. Regional differences in year-class strength are consistent with this proposed pattern of isolation.…”

Section: Discussionmentioning

confidence: 74%

“…Thus, they are found close to areas of suitable sediment throughout the year. Movements following settlement appear to be rather limited with virtually no dispersal between areas > 30 km apart (Gauld 1990). Sandeels are an important prey of kittiwakes, with predominantly Age 1 and older fish (1+ group) being taken during incubation and young of the year (0 group) during chick rearing (Wright 1996, Lewis et al 2001b.…”

Section: Introductionmentioning

confidence: 99%

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Regional patterns of kittiwake Rissa tridactyla breeding success are related to variability in sandeel recruitment

Frederiksen¹,

Wright²,

Harris³

et al. 2005

Mar. Ecol. Prog. Ser.

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The population dynamics of marine top predators such as seabirds may be self-regulating through local prey depletion, or they may reflect environmentally induced fluctuations in prey availability. Both mechanisms are not mutually exclusive. We examined spatio-temporal variation in breeding success of black-legged kittiwakes Rissa tridactyla, a seabird widely monitored in the British Isles. Kittiwakes here feed mostly on lesser sandeels Ammodytes marinus, a species that is strongly tied to specific sediment types and therefore shows a strong regional population structure. Neither kittiwake colony growth rate nor breeding success correlated negatively with colony size as expected under local prey depletion in the absence of regional variation in carrying capacity. We used multivariate analyses of breeding success data for 42 kittiwake colonies to identify clusters showing synchronised variation in success, and compared these with known sandeel aggregations identified from fish and fishery surveys. A number of geographically distinct clusters of kittiwakes were identified, and these were largely congruent with sandeel aggregations. Major sandeel aggregations with clear associated clusters of kittiwake colonies occurred off of east England and east Scotland, while western coasts of Britain were characterised by smaller aggregations and less obvious kittiwake clusters. There was considerable regional variability in sandeel recruitment, and this was reflected in mostly uncorrelated time series of kittiwake breeding success between different regions. These results indicate that regional variation in prey availability had a stronger effect on kittiwake dynamics than local prey depletion. An appreciation of the appropriate spatial scale of prey dynamics thus improves understanding of the dynamics of marine predator -prey systems.

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Section: Discussionmentioning

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Regional patterns of kittiwake Rissa tridactyla breeding success are related to variability in sandeel recruitment

Frederiksen¹,

Wright²,

Harris³

et al. 2005

Mar. Ecol. Prog. Ser.

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“…Consensus has been reached that after settling individuals show high site fidelity (e.g. Gauld 1990, Pedersen et al 1999.…”

Section: Introductionmentioning

confidence: 99%

Recruitment of lesser sandeel Ammodytes marinus in relation to density dependence and zooplankton composition

Deurs¹,

Hal²,

Tomczak³

et al. 2009

Mar. Ecol. Prog. Ser.

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Recent recruitment failure of lesser sandeel Ammodytes marinus, a key prey fish in the North Sea, followed by several years of low spawning stock biomass, prompted us to investigate factors influencing the recruitment of this species. We tested 2 hypotheses that relate to ecological mechanisms of recruitment regulation in lesser sandeel: (1) a positive spawning stock-recruitment relationship is decoupled in years associated with high abundances of age-1 sandeels and (2) the survival success of early larvae depends specifically on the abundance of Calanus finmarchicus and not C. helgolandicus. The findings of the present study supported both hypotheses and resulted in a multiple linear recruitment model with pronounced predictive capabilities. The model includes interactions between age-1 abundance and spawning stock biomass, plus the effect of C. finmarchicus abundance, and it explained around 65% of the inter-annual variation in recruitment in contrast to only 12% by a traditional Ricker curve. We argue that early egg production in C. finmarchicus supports the survival of larvae, and that climate-generated shifts in the Calanus species composition lead to a mismatch in timing between food availability and the early life history of lesser sandeels.

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“…NOTE corresponding trends , such that Pacific Sand Lances are rarely found in the water column during winter months. Pacific Sand Lances in this region are known to spawn between December and February in intertidal habitats (Penttila 1995), and Lesser Sand Eels A. marinus can migrate between deep and nearshore waters as a function of season and life stage (Andriyashev 1954;Gauld 1990); however, the lack of differentiation of the size-classes of fish sampled suggest that the increased abundance in the sediments represents a transition from pelagic foraging to benthic dormancy rather than an influx in the return of spawning adults. Additionally, while Ammoydytes species mature at various ages across their range , and size at maturity is not known for the local population (Selleck et al 2015), maturation does not occur until fish exceed 100 mm in length (Boulcott et al 2007).…”

Section: Trends Across the Fall Transitionmentioning

confidence: 99%

Feeding Ecology of Pacific Sand Lance in the San Juan Archipelago

Sisson

Baker

2017

Mar Coast Fish

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Forage fishes such as Pacific Sand Lance Ammodytes personatus are a crucial link between lower and upper elements in marine food webs, as they transfer energy from plankton to higher trophic levels. Despite their importance to marine food webs, little is known about the population structure and feeding ecology of Pacific Sand Lance. In this study, we examined the population density and diet composition of Pacific Sand Lance as well as feeding patterns and movement in response to tidal, diel, and seasonal cycles in a prominent sand wave field in the San Juan Channel, Washington. A generalized linear model was applied to account for the corresponding effects of tidal, diel, and seasonal trends as well as habitat affinity related to substrate type. We showed that fish distributions were predominantly driven by sediment type and that time of day had a significant influence on foraging behavior with distinct crepuscular feeding patterns. Our results also provide evidence for the cessation of feeding over the fall transition and the onset of a winter dormant period, as observed by increased densities of fish within the sand wave field (177%), a marked increase in the number of empty stomachs (511%), and a significant decrease in condition factor. These trends correspond with the expectations that Pacific Sand Lances exhibit a winter dormant phase and burrow in sediments throughout the winter months to conserve energy and reduce predation risk during periods of low productivity. We anticipate our study to be a starting point for understanding the foraging ecology of the Pacific Sand Lance, particularly in the San Juan Archipelago and Salish Sea. The results of this study may improve the understanding of Pacific Sand Lance habitat and availability to pelagic predators, inform fisheries management, and increase the resolution of marine food web models.The transfer of energy between primary and higher trophic levels in marine ecosystems often occurs through a few species of highly abundant, small forage fishes (Cury et al. 2000). As such, forage fishes are a crucial link between lower and upper elements in the food chain as they transfer energy from primary producers (e.g., phytoplankton) and secondary consumers (e.g., zooplankton) to higher trophic levels (e.g., piscivorous fishes, seabirds, and marine mammals) (Robards et al. 1998;Harvey et al. 2010). These fishes may also channel energy flow between various marine habitats, as many forage fish species occupy intertidal and subtidal communities . Variation in the abundance of forage fish populations can significantly impact marine ecosystems (Bargmann 1998). Thus, despite relatively few focused studies on these taxa, planktivorous fishes are an important component driving trophic dynamics in many marine and coastal ecosystems (Pikitch et al. 2012).

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Movements of lesser sandeels (Ammodytes marinus Raitt) tagged in the northwestern North Sea

Cited by 26 publications

References 0 publications

Regional patterns of kittiwake Rissa tridactyla breeding success are related to variability in sandeel recruitment

Regional patterns of kittiwake Rissa tridactyla breeding success are related to variability in sandeel recruitment

Recruitment of lesser sandeel Ammodytes marinus in relation to density dependence and zooplankton composition

Feeding Ecology of Pacific Sand Lance in the San Juan Archipelago

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