A temperature shift on the migratory route similarly impairs hypo-osmoregulatory capacities in two strains of Atlantic salmon (Salmo salar L.) smolts

Bernard, Bernoît; Mandiki, Syaghalirwa N.M.; Duchatel, Victoria; Xavier, Raquel; Kestemont, Patrick

doi:10.1007/s10695-019-00666-x

Cited by 18 publications

(6 citation statements)

References 54 publications

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“…Secondly, the average temperature shift of 3.3 • C between the Ourthe tributary and the Meuse river might also disturb and slow down the downstream migration stimulation by reducing gill NKA, plasma GH, and cortisol levels. This would lead to a reduction of hypo-osmoregulatory capacities and a loss of seawater tolerance, with, in the worst case, a possible desmoltification (Duston et al, 1991;McCormick et al, 1999;Bernard et al, 2019Bernard et al, , 2020. The median migration speed of the smolts from the release site to the most downstream detection was 0.11 m s − 1 .…”

Section: Discussionmentioning

confidence: 99%

Trying to choose the less bad route: Individual migratory behaviour of Atlantic salmon smolts (Salmo salar L.) approaching a bifurcation between a hydropower station and a navigation canal

Renardy

Takriet

Benitez

et al. 2021

Ecological Engineering

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Contrary to small-and medium-sized rivers, little attention has been paid to the downstream migration of Atlantic salmon smolts in large-sized rivers and the size-related impact of hydropower stations. From 2014 to 2016, we investigated the downstream migration of n = 72 acoustic-tagged smolts in the Meuse river at a bifurcation zone between a hydropower station equipped with three Kaplan turbines and a navigation canal. A hydrodynamic model that solves the depth-integrated shallow water equations on a Cartesian grid using a finite volume technique was used to infer the influence of water discharge and flow velocity on the smolts' behaviour upstream of the hydroelectric complex. Of the migrating smolts, 41.5% performed back and forth movements before approaching the complex for the first time, sometimes over long distances and at a slow pace, leading to significant delays (3-298 h). Beyond about 250 m 3 s − 1 , the water flow direction changes towards the hydropower station with a gradual acceleration. A median water discharge of 161 m 3 s − 1 and associated median flow velocity of 0.14 m s − 1 tended to favour a more direct and downstream movement towards the hydropower station. On the other hand, the navigation canal was mainly approached at low water discharge (median 132 m 3 s − 1 ), due to a higher flow velocity (median 0.11 m s − 1 ) at the entrance. Of the released smolts, only 38.6% passed through the complex, of which 36.4% migrated by the navigation canal and 63.6% by the hydropower station, with a median research time of 04:44. Among all the released individuals, the escapement rate at the end of the study site was 2.9% by the canal and 8.3% by the Meuse river. This site, which offers two non-optimal, unattractive and unsafe migration routes, turns out to be problematic for successful downstream smolt migration.

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Section: Discussionmentioning

confidence: 99%

Trying to choose the less bad route: Individual migratory behaviour of Atlantic salmon smolts (Salmo salar L.) approaching a bifurcation between a hydropower station and a navigation canal

Renardy

Takriet

Benitez

et al. 2021

Ecological Engineering

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“…Disruption of ion balance is also observed in salmonids infected with parasites such as sea lice (Figure 1a; Lepeophtheirus salmonis ; Nendick et al, 2010; Wells et al, 2006) or the amoebic gill disease‐causing ectoparasite Paramoeba perurans (Hvas et al, 2017), the former also presenting a potential issue for non‐cultured fishes found in proximity to salmon farms (Morton et al, 2004). In net‐pen aquaculture, the occurrence of dramatic changes in abiotic conditions such as elevated temperature and hypoxia (Figure 1a; Burt et al, 2012; Stehfest et al, 2017) also can result in detrimental effects on ion balance (Bernard et al, 2019; Christensen et al, 2017; Damsgaard et al, 2020; Giacomin, Eom, et al, 2019; Iftikar et al, 2010; Imsland et al, 2003; Islam et al, 2020; Onukwufor & Wood, 2018; Vargas‐Chacoff et al, 2018) as a function of impaired ATPase function and/or the osmorespiratory compromise (Section 2.2). In addition, poor water quality conditions, such as elevated ammonia (Figure 1c, Hong et al, 2019) or nitrite (Tomasso, 2012), also have been found to act as disruptors of ion regulation (Liew et al, 2013; Martinez & Souza, 2002; Twitchen & Eddy, 1994; Wood & Nawata, 2011).…”

Section: Ion Regulation and Aquaculturementioning

confidence: 99%

Physiology and aquaculture: A review of ion and acid‐base regulation by the gills of fishes

Zimmer

Perry

2022

Fish and Fisheries

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Fish aquaculture facilities strive to maintain abiotic conditions that optimise somatic growth. Two physiological systems that are critically linked to environmental abiotic factors are ion and acid-base regulation. Given the detrimental effects of ionic and acid-base imbalances coupled with the potential energetic costs of ion and acid-base regulation, it is important to understand how changes in abiotic variables such as salinity, temperature and pH alter ionoregulatory and acid-base physiology. The gill is the predominant site of ion and acid-base regulation, two linked processes that are vital to the health of fishes. Most species maintain ion levels in the blood plasma within a narrow range, independent of external ion concentrations. In freshwater (FW), fishes must actively take up ions from their dilute environment to counteract passive ion losses, while in seawater (SW), ion excretion serves to counteract passive salt gain. Ion uptake (FW) and excretion (SW) are coordinated by different subtypes of ion-transporting cells (ionocytes) expressed in the gill epithelium. In this review, we discuss the function of FW and SW ionocytes in the movement of ions across the gill epithelium and address other features of the gill that are integral to ionoregulation.We also discuss the mechanisms of acid-base regulation by the gill, which is intimately related to ion regulation because it is coordinated by Na + -and Cl − -linked fluxes of acid (H + ) and base (HCO − 3 ) equivalents. These fundamental physiological principles are integral in understanding how fishes in aquaculture respond to relevant disturbances that may occur under culture conditions.

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“…Turbot, S. maximus , and Sole, Solea senegalensis acclimatized at 18 and 11°C, for 21 days showed a significant decrease in plasma Na + and Cl − ions concentration compared to fish reared at 4 and 0°C (Foss et al, 2019). Bernard et al (2019) reported the increased Na + ‐K + ATPase activity and plasma Na + , Cl − in Atlantic salmon, S. salar reared at 5 and 8°C than fish at 15 and 20°C during 90 days of exposure. In recent studies, European seabass, D. labrax exposed to 8 and 32°C exhibited significantly increased Na + ‐K + ATPase, NKCC1, Cystic fibrosis transmembrane conductance (CFTR) upregulation while acclimatized at both low and high saline water (Islam, Kunzmann, Henjes, & Slater, 2021; Islam, Slater, & Kunzmann, 2020).…”

Section: Responses Of Aquaculture Fish To Extreme Temperature Eventsmentioning

confidence: 99%

Responses of aquaculture fish to climate change‐induced extreme temperatures: A review

Islam

Kunzmann

Slater

2021

J World Aquaculture Soc

105

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Climate change‐induced extreme temperature events are becoming more intense and frequent. For fish, temperature is the master abiotic factor that controls and limits fish development and physiology at all stages of aquaculture. Major physiological constraints at the individual level underpin changes in fish growth, hemato‐physiology, metabolism, immune and molecular stress responses to extreme temperature events. Extreme temperature impacts on fish vary among and within the diverse species depending on stress magnitude and associated factors. This review synthesizes the impacts of climate change‐induced extreme temperature events on neuroendocrine, oxidative, metabolic, osmotic, molecular, hemato‐biochemical, and immune responses in fish related to aquaculture. Besides, overall aspects of extreme temperature impacts on fish growth and reproduction are also discussed. Possible mitigation measures to maintain the fish's physiological fitness during extreme temperature events are also addressed. However, studies on the interactive effects of extreme temperature events with other associated environmental stressors are needed across a broader range of species to gain a better understanding of fish response and aquaculture performance during extreme temperature events. Moreover, for fish, studies on alternative species, development of stress‐tolerant strains, and the possibilities of nutritional mitigation measures as a potential option to combat extreme temperature stress are promising and should be pursued in future studies.

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A temperature shift on the migratory route similarly impairs hypo-osmoregulatory capacities in two strains of Atlantic salmon (Salmo salar L.) smolts

Cited by 18 publications

References 54 publications

Trying to choose the less bad route: Individual migratory behaviour of Atlantic salmon smolts (Salmo salar L.) approaching a bifurcation between a hydropower station and a navigation canal

Trying to choose the less bad route: Individual migratory behaviour of Atlantic salmon smolts (Salmo salar L.) approaching a bifurcation between a hydropower station and a navigation canal

Physiology and aquaculture: A review of ion and acid‐base regulation by the gills of fishes

Responses of aquaculture fish to climate change‐induced extreme temperatures: A review

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