Long-term effects of high-energy, low-fishmeal feeds on growth and flesh characteristics of Atlantic salmon (Salmo salar L.)

Aquaculture ◽  
2011 ◽  
Vol 312 (1-4) ◽  
pp. 109-116 ◽  
Author(s):  
Chris André Johnsen ◽  
Ørjan Hagen ◽  
Eldar Åsgard Bendiksen
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
High Energy ◽  
Long Term Effects ◽  
Atlantic Salmon Salmo Salar

Lack of long-term sublethal effects of reduced freshwater pH alone on Atlantic salmon (Salmo salar) smolts subsequently transferred to seawater

2004 ◽  
Vol 61 (4) ◽  
pp. 511-518 ◽  
Author(s):  
Sveinung Fivelstad ◽  
Anne Berit Olsen ◽  
Sigurd Stefansson ◽  
Sigurd Handeland ◽  
Rune Waagbø ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Sublethal Effects ◽  
Growth Parameters ◽  
Gill Tissue ◽  
Low Ph ◽  
Control Group ◽  
Long Term Effects ◽  
Atlantic Salmon Salmo Salar

Atlantic salmon (Salmo salar) smolts (mean start weight 42 g) in soft freshwater were exposed to three pH ranges (two replicates in each group) for 35 days: pH 6.5–6.8 (control group), pH 5.9–6.3 (medium-pH group), and pH 5.4–5.9 (low-pH group). All exposures had citrate added to remove labile, toxic Al from the water. On day 35, all groups were transferred to 34‰ seawater and kept there for 100 days. H+ was the main stressor in the exposures because labile Al was <6 µg·L–1 and the gill Al was lower than 27 µg·g dry weight–1 (highest in the medium group). The exposure environments did not cause any significant changes to gill tissue structures, gill Na+,-K+-ATPase activity, mortality, and growth parameters during the freshwater period. However, haematocrit was significantly increased and mean plasma chloride was significantly reduced (p < 0.05) in the low-pH group compared with the control group. This study indicated that the H+ concentrations in the pH range 5.4–5.9 in water containing no to little gill-reactive Al do not impact salmon growth and physiology during smoltification. However, the reduction in blood haematocrit in the low-pH group 3 months after seawater transfer may imply long-term effects of the treatment.

Short- and long-term effects of dietary l-tryptophan supplementation on the neuroendocrine stress response in seawater-reared Atlantic salmon (Salmo salar)

Aquaculture ◽  
2013 ◽  
Vol 388-391 ◽  
pp. 8-13 ◽  
Author(s):  
Dean Basic ◽  
Åshild Krogdahl ◽  
Joachim Schjolden ◽  
Svante Winberg ◽  
Marco A. Vindas ◽  
...  
Keyword(s):  
Stress Response ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Long Term Effects ◽  
Atlantic Salmon Salmo Salar ◽  
Short And Long Term

scholarly journals Long-term welfare effects of repeated warm water treatments on Atlantic salmon (Salmo salar)

Aquaculture ◽  
2021 ◽  
pp. 737670
Author(s):  
Lene Moltumyr ◽  
Jonatan Nilsson ◽  
Angelico Madaro ◽  
Tore Seternes ◽  
Fredrik Agerup Winger ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Welfare Effects ◽  
Warm Water ◽  
Atlantic Salmon Salmo Salar ◽  
Water Treatments

Long-term changes in migration timing of adult Atlantic salmon (Salmo salar) at the southern edge of the species distribution

2004 ◽  
Vol 61 (12) ◽  
pp. 2392-2400 ◽  
Author(s):  
Francis Juanes ◽  
Stephen Gephard ◽  
Kenneth F Beland
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Global Climate ◽  
Life History Trait ◽  
Connecticut River ◽  
Migration Timing ◽  
Atlantic Salmon Salmo Salar ◽  
The North ◽  
Long Term Changes

The Connecticut River historically represented the southernmost extent of the North American range of Atlantic salmon (Salmo salar), but the native population was extirpated 200 years ago by dam construction. An extensive restoration effort has relied upon stock transfers from more northerly rivers, especially the Penobscot River (Maine). Recent work has shown differences in age structure between donor and derivative populations. Here we focus on a related life-history trait, the timing of the adult migration. We examined 23 years of migration timing data collected at two capture locations in the Connecticut River drainage. We found that both dates of first capture and median capture dates have shifted significantly earlier by about 0.5 days·year–1. To conclude whether this is a consequence of local adaptation or a coast-wide effect, we also quantified changes in migration timing of more northerly stocks (in Maine and Canada). We found that the changes in migration timing were not unique to the Connecticut River stock and instead observed coherent patterns in the shift towards earlier peak migration dates across systems. These consistent shifts are correlated with long-term changes in temperature and flow and may represent a response to global climate change.

scholarly journals Modelling the long-term feed-to-fillet transfer of leuco crystal violet and leuco malachite green in Atlantic salmon (Salmo salar)

2018 ◽  
Vol 35 (8) ◽  
pp. 1484-1496 ◽  
Author(s):  
Marc H. G. Berntssen ◽  
Rita Hannisdal ◽  
Louise Buttle ◽  
Rudolf Hoogenveen ◽  
Marcel Mengelers ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Malachite Green ◽  
Salmo Salar ◽  
Crystal Violet ◽  
Atlantic Salmon Salmo Salar ◽  
Leuco Crystal Violet ◽  
Leuco Malachite Green

scholarly journals Atlantic salmon (Salmo salar) smolt and early post-smolt migration and survival inferred from multi-year and multi-stock acoustic telemetry studies in the Gulf of St. Lawrence, northwest Atlantic

2018 ◽  
Vol 76 (4) ◽  
pp. 1107-1121 ◽  
Author(s):  
Gérald Chaput ◽  
Jonathan Carr ◽  
Jason Daniels ◽  
Steve Tinker ◽  
Ian Jonsen ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Survival Rates ◽  
Fork Length ◽  
Probability Of Survival ◽  
Size Dependent ◽  
Atlantic Salmon Salmo Salar ◽  
Key Points ◽  
Migration Dynamics

Abstract The migration dynamics and inter-annual variation in early at-sea survival of Atlantic salmon (Salmo salar) smolts over 14 years of study are reported for four river populations located in the Gulf of St. Lawrence (Canada). Acoustically tagged smolts were monitored at three points along their migration from freshwater to the Labrador Sea, a migration extending more than 800 km at sea and a period of 2 months. A hierarchical state-space version of the Cormack–Jolly–Seber model was used to estimate apparent survival rates from incomplete acoustic detections at key points. There was a positive size-dependent probability of survival through the freshwater and estuary areas; the odds of survival of a 16 cm smolt were 1.5–1.7 times higher than for a 13.5 cm smolt, length at tagging. Length adjusted (centred to the mean fork length of smolts during the study of 14.6 cm) survivals through the estuary and nearshore waters were estimated to range between 67 and 90% for the two river populations migrating through Chaleur Bay in contrast to lower survival estimates of 28–82% for the two populations from the neighbouring Miramichi Bay. Across the 14 years of study, survival estimates varied without trend for the populations of Chaleur Bay, but declined for the populations migrating through Miramichi Bay. Survival through the Gulf of St. Lawrence was variable but generally high among years and rivers, ranging from 96% day−1 to 99% day−1. Long term, replicated studies at multiple sites using acoustically tagged smolts can provide empirical data to examine hypotheses of the location and timing of factors contributing to smolt and post-smolt mortality of salmon at sea.

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