Fish growth, physiological stress, and tissue condition in response to rate of temperature change during cool or warm diel thermal cycles

Abstract

The effect of the rate of temperature change on fish was studied by exposing a variety of North American fish species to diel temperature cycles containing rates of change of 0.8, 1.1, 2.2, or 4.4°C·h −1 . During a simulated cool season (3.9-11.7°C), bluntnose minnow (Pimephales notatus), spotfin shiner (Cyprinella spiloptera), and white sucker (Catostomus commersonii), but not smallmouth bass (Micropterus dolomieu), gained mass in response to 0.8, 1.1, or 2.2°C·h −1 but not constant mean temperature. White sucker did not grow under 4.4°C·h −1 , which was slower than expected based upon bioenergetics models. Physiological indicators of acute stress (day 1 cortisol), chronic stress (day 44 cortisol and triglycerides), and histomorphological measures suggested no effect of treatment. During a simulated warm season (20.0-27.8°C), growth by channel catfish (Ictalurus punctatus), rosyside dace (Clinostomus funduloides), smallmouth bass, and spotfin shiner was not altered by any rate of temperature change; however, walleye (Sander vitreus) and white sucker grew slower than expected under 4.4°C·h −1 . Physiological indicators of acute stress (day 1 cortisol), chronic stress (day 29 cortisol and triglycerides), and histomorphological measures suggested no effect of treatment. Chronic exposure to temperature change of 4.4°C·h −1 may not induce an acute or chronic stress response but may slightly impair growth for some species.Résumé : L'effet du taux de variation de la température sur les poissons a été étudié en exposant diverses espèces de poissons nord-américains à des changements de température de 0,8, 1,1, 2,2 ou 4,4°C·h −1 incorporés dans les cycles thermiques nycthé-méraux. Durant une saison froide simulée (3,9-11,7°C), des ventres-pourris (Pimephales notatus), des ménés bleus (Cyprinella spiloptera) et des meuniers noirs (Catostomus commersonii), mais non des achigans à petite bouche (Micropterus dolomieu), ont gagné du poids en réponse aux traitements à 0,8, 1,1 et 2,2°C·h −1 , mais non à température moyenne constante. Les meuniers noirs n'ont pas crû à des taux de réchauffement inférieurs à 4,4°C·h −1 , ce qui est plus lent que prévu selon des modèles bioénergétiques. Les indicateurs physiologiques de stress aigu (cortisol au 1 er jour) et de stress chronique (cortisol et triglycérides au 44 e jour) et les mesures histomorphologiques ne semblent indiquer aucun effet des traitements. Pendant une saison chaude simulée (20,0-27,8°C), la croissance des barbues de rivière (Ictalurus punctatus), des ménés (Clinostomus funduloides), des achigans à petite bouche et des ménés bleus n'a été modifiée par aucun des taux de réchauffement; cependant, les dorés jaunes (Sander vitreus) et les meuniers noirs ont crû moins vite que prévu à des taux inférieurs à 4,4°C·h −1 . Les indicateurs physiologiques de stress aigu (cortisol au 1 er jour) et de stress chronique (cortisol et triglycérides au 29 e jour) et les mesures histomorphologiques ne semblent indiquer aucun effet des traitements. Si l'exposition chronique à des changemen...

Thermal stress altered growth performance and metabolism and induced anaemia and liver disorder in Labeo rohita

“…Ruyet, Mahe, Bayon, and Delliou (2004) also reported similar observation in European bass. During extreme temperature stress, organisms try to cope up the situation by altering metabolism so that energy can be channelled to vital organ like brain vis-a-vis compromise with other physiological performances such as growth (Eldridge, Sweeney, & Law, 2015) as documented here. Previously, different researchers also referred RNA-DNA ratio as an environmental stress indicator for aquatic animals (Chícharo & Chícharo, 2008;Foley, Bradley, & Höök, 2016).…”

Floods, Hurricanes, and Other Catastrophes: A Challenge for the Immune System of Livestock and Other Animals

“…Water temperature can deeply affect fish immune system. Acute and chronic changes in temperature have also different impacts on animals, being short term episodes compensated by processes such as heat shock protein response, while chronic temperature variations are less likely to be solved by such responses (52)(53)(54)(55).…”

Effects of acute environmental and handling exposure on physiology and fillet quality of market‐sized Channel Catfish

“…Plasma cortisol increases circulating concentrations of glucose (Eldridge, Sweeney, & Law, 2015), which helps provide readily available energy for maintenance of homeostasis in part through anaerobic pathways which leads to lactic acid build-up (Weber, Choi, Gonzalez, & Omlin, 2016;Wood, 1991). Increased lactate can be indicative of anaerobic metabolism, which is typically utilized in situations with low DO (Donaldson et al, 2014).…”