The migratory behaviour of wild Atlantic salmon (Salmo salar L.) smolts in the River Test and Southampton Water, southern England

Moore, A. M.; Ives, Stephen J.; Mead, Tom; Talks, L.

doi:10.1007/978-94-011-5090-3_33

Cited by 41 publications

(55 citation statements)

References 16 publications

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“…Diurnal changes in smolt behaviour may have been related to foraging, which occurs mainly during the day as smolt require visual cues for detecting prey (Kadri et al 1997) or avoiding predators . The pattern of smolt migration was, therefore, consistent with smolt migrating offshore nocturnally (which has been reported by Aprahamian & Jones 1997, Moore et al 1998, using increases in salinity on inflowing currents for orientation, and using daytime hours for prey detection and predator avoidance.…”

Section: Discussionsupporting

confidence: 86%

“…Box plots as in Fig. 5 the relatively high rates of seaward migration in estuaries during the ebb tide found in previous studies (see Tytler et al 1978, Aprahamian & Jones 1997, Moore et al 1998). This by itself does not suggest passive migration; it merely means that smolt migration was aided by outflowing currents.…”

Section: Discussionmentioning

confidence: 53%

“…Some authors have found distinct periodicities, with smolt migrating seaward during the ebb tide, suggesting a passive component to the migration (McCleave 1978, Tytler et al 1978, Aprahamian & Jones 1997, Lacroix et al 2005. Other authors have found evidence of active migration, such as smolt moving against tides (Moore et al 1998) or independently of current direction (Thorstad et al 2004(Thorstad et al , Økland et al 2006.…”

Section: Introductionmentioning

confidence: 99%

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Active migration of wild Atlantic salmon Salmo salar smolt through a coastal embayment

Hedger¹,

Martin²,

Hatin³

et al. 2008

Mar. Ecol. Prog. Ser.

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Migration patterns of wild Atlantic salmon Salmo salar smolt were examined in a coastal embayment in the Gaspé peninsula of Québec, Canada. Twenty-four smolt in 2005 and 30 in 2006 were tagged with coded ultrasonic transmitters, and their migration throughout the bay was monitored using an array of fixed VR2 hydrophone receivers. Migration patterns were complex, with some smolt taking a direct route through the coastal embayment and others repeatedly changing direction over short spatial and temporal scales. Migration was mainly an active process with an overall outward (seaward) migration in the face of an inward residual circulation. Swimming direction was mainly outward during nocturnal inflowing currents but was more dispersed during daytime and nocturnal outflowing currents; swimming speed was greater during daytime than during nighttime. This pattern was consistent with smolt migrating offshore nocturnally and using daytime for prey detection and predator avoidance. Salinity had a strong effect: exposure to more saline waters caused increased swimming speeds. These observations are consistent with the hypothesis that smolt exploit an innate compass to maintain a preferred bearing and that the speed and direction of swimming is controlled by salinity and the diurnal cycle.

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Section: Discussionsupporting

confidence: 86%

Section: Discussionmentioning

confidence: 53%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Active migration of wild Atlantic salmon Salmo salar smolt through a coastal embayment

Hedger¹,

Martin²,

Hatin³

et al. 2008

Mar. Ecol. Prog. Ser.

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“…Postsurgery holding duration for migration studies involving wild fish have ranged from release within 30 min of recovery [brown trout (Ovidio et al 1998); juvenile Atlantic salmon (Moore et al 1998)], to overnight [juvenile brown trout and Atlantic salmon (Jepsen et al 1998)] and up to several days [juvenile Atlantic salmon (Voegeli et al 1998); juvenile Atlantic salmon and sea trout Salmo trutta (Aarestrup et al 2002)]. However, recommending a best practice is difficult because little work has been conducted to evaluate the magnitude and duration of the stress response subsequent to surgical procedures.…”

Section: Holding Durationmentioning

confidence: 99%

Holding of juvenile salmonids for surgical implantation of electronic tags: a review and recommendations

Oldenburg

Colotelo

Brown

et al. 2011

Rev Fish Biol Fisheries

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Many telemetry-based studies require that fish be sampled from the wild and then held both prior to and after the implantation of an electronic tag. However, the effects of such holding (or the lack thereof) have yet to be studied intensively. Presurgical holding often occurs to facilitate logistical needs of research projects and as an attempt to minimize negative physiological effects due to capture and handling stress. Further, post-surgical holding time and conditions greatly influence the physiological state of fish prior to being returned to the wild. This paper reviews pertinent studies pertaining to the effects of surgical holding on the behavior, physiology, and survival of fishes, with particular emphasis on juvenile salmonids. The effects of individual aspects of surgical holding such as handling, water quality, light conditions, holding density, metabolic scope, and duration of holding are reviewed. Recommendations regarding certain aspects of surgical holding are offered with a goal of reducing bias related to the surgical process.

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“…Recent studies have demonstrated that appreciable numbers of smolts make pronounced upstream "reversal" movements during flood tides (Kocik et al 2009, Martin et al 2009). Unlike in freshwater, where smolts typically move downstream at night presumably to avoid visual predators (Martin et al 2009, Moore et al 1995, Ruggles 1980, smolts within estuaries have been observed moving at all hours of the day (Kocik et al 2009;LaCroix et al 2004;Martin et al 2009; Moore et al 1995Moore et al , 1998. It is unclear if different estuarine behaviors, such as migration during day or night, on flood or ebb tides, or rapid transit of the estuary versus prolonged estuary residency, result in differential survival.…”

Section: Introductionmentioning

confidence: 93%

Assessing Efficacy of Non-Lethal Harassment of Double-Crested Cormorants to Improve Atlantic Salmon Smolt Survival

Hawkes

Saunders

Vashon

et al. 2013

Northeastern Naturalist

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The migratory behaviour of wild Atlantic salmon (Salmo salar L.) smolts in the River Test and Southampton Water, southern England

Cited by 41 publications

References 16 publications

Active migration of wild Atlantic salmon Salmo salar smolt through a coastal embayment

Active migration of wild Atlantic salmon Salmo salar smolt through a coastal embayment

Holding of juvenile salmonids for surgical implantation of electronic tags: a review and recommendations

Assessing Efficacy of Non-Lethal Harassment of Double-Crested Cormorants to Improve Atlantic Salmon Smolt Survival

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