Hemoglobin level, metabolic rate and swimming performance in triploid brook trout (Salvelinus fontinalis)

Stillwell, Evelyn J.; Benfeyl, Tillmann J.

doi:10.1016/0044-8486(96)83595-2

Cited by 14 publications

(7 citation statements)

References 11 publications

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“…Conversely, the larger cells of triploid individuals should be associated with their lower SMR. This is supported by the results of our study as well as a complementary study on triploid vs. diploid brook trout (Salvelinus fontinalis) (Stillwell & Benfey 1995). However, other studies comparing SMR of triploid and diploid brook trout (Hyndman, Kieffer & Benfey 2003) and Atlantic salmon (Benfey & Sutterlin 1984) did not find appreciable differences in SMR between di-and triploid forms or even reported higher routine metabolic rates in the latter (Atkins & Benfey 2008).…”

Section: Discussionsupporting

confidence: 89%

Standard Metabolic Rate (SMR) is inversely related to erythrocyte and genome size in allopolyploid fish of the Cobitis taenia hybrid complex

et al. 2011

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Summary 1.As a first approximation, whole-body metabolic rate can be considered as the sum of metabolic rates of constituent cells. Yet, among several current explanations of metabolic rate scaling, only two explicitly invoke cell architecture of organisms: (1) the Metabolic Theory of Ecology, which predicts size invariance of metabolically active cells, such as erythrocytes and (2) the cell metabolism hypothesis postulating partial dependence of metabolic scaling on the cell size (CS), which is mediated by nucleus ⁄ genome size variation.2. Here, we tested (1) and (2) by comparing standard metabolic rate (SMR), erythrocyte size (used as a proxy of CS) and nucleus size (NS) between diploid and triploid individuals of a small fish (body mass of c. 3 g) belonging to the Cobitis taenia hybrid complex. 3. We demonstrated a positive correlation of CS with genome ⁄ nucleus size and an inverse relationship between those traits and SMR. SMR scaled to body mass with a 0AE92 ± 0AE05 exponent, which significantly differed from the ¾ value, while CS scaled with body mass with an allometric exponent of 0AE05 ± 0AE007, which significantly differed from 0. Ploidy level explained c. 85% of CS variation. 4. Our results provide empirical support for CS and genome ⁄ nucleus size being important determinants of metabolic rate variation and consequently, its allometric scaling. They call attention to the significance of a long-neglected integration of cellular and organismal perspectives in studies of body size-metabolic rate relationships and their consequences for energy utilization in the wild.

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Section: Discussionsupporting

confidence: 89%

Standard Metabolic Rate (SMR) is inversely related to erythrocyte and genome size in allopolyploid fish of the Cobitis taenia hybrid complex

et al. 2011

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“…This has implications for the oxygen carrying capacity and responds to a reduced metabolic scope in triploids at high temperatures as previously suggested for triploid chinook salmon Oncorhynchus tshawytscha (Bernier et al 2004). In the literature, blood haemoglobin concentrations in triploid salmonids have been reported to be both equal (Stillwell & Benfey 1994 and lower (Benfey & Sutterlin 1984, Small & Randall 1989, Yamamoto & Iida 1994, Kobayashi et al 2009 compared to diploids, as has the blood-oxygen affinity (Graham et al 1985, Verhille & Farrell 2012. However, lower blood haemoglobin concentrations in triploids, as measured particularly at high water temperatures in the present study, ultimately limits oxygen transport to the tissues.…”

Section: Discussionmentioning

confidence: 41%

Changes in water temperature and oxygen: the effect of triploidy on performance and metabolism in large farmed Atlantic salmon

Sambraus¹,

Remen²,

Olsen³

et al. 2018

Aquacult. Environ. Interact.

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In salmon farming, the use of sterile triploids (3N) can mitigate the problem of escapees interbreeding with wild salmon. However, triploid salmon appear less tolerant to high water temperatures and low oxygen levels compared to diploids (2N). To investigate how the thermal performance and physiology of large (2.5 kg) triploid Atlantic salmon Salmo salar L. differs from those of diploids, both ploidies were subjected to water temperatures between 3 and 18°C. The fish were exposed to reduced oxygen saturations (O 2 sat , 70%), termed hypoxia, at 6 and 18°C. Triploids fed more than diploids between 3 and 9°C and at similar levels at 12°C. At 15°C, the feed intake significantly dropped in both ploidies, although more in triploids. During hypoxia, feed intake was higher in triploids at 6°C and equal to diploids at 18°C. The overall feed conversion ratio was similar between ploidies. Muscle energy phosphates were generally lower in triploids than diploids, while muscle glucose, blood haemoglobin and haematocrit were lower in triploids than diploids at ≥12°C. Plasma lactate levels tended to be higher in triploids and increased with increasing temperature and at hypoxia in both ploidies. Plasma cortisol increased in both ploidies at high temperatures and was highest in triploids under hypoxic conditions at 18°C. Triploids had a higher cataract score at the start of the experiment and developed more cataracts throughout the experiment. The present findings show that large triploid Atlantic salmon perform better at colder water temperatures compared to diploids and differ in parts of their physiological expression at increasing and high temperature.

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“…This may be due to the overall oxygen consumption rates and swimming performance under normal condition (Stillwell and Benfey 1995). MCHC in all the seven marine teleost fishes ranged between 120% and 169%.…”

Section: Discussionmentioning

confidence: 99%

Comparative investigation on haematological and biochemical studies on wild marine teleost fishes from Vellar estuary, southeast coast of India

et al. 2010

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Haematological parameters are often used to assess the health status and as stress indicators in fishes. In this present study, the haematological parameters such as red blood cell count (RBC), white blood cell count (WBC), haematocrit (HCT), haemoglobin (HB), mean cell volume, mean cell haemoglobin and mean cell haemoglobin concentration, RBC/WBC ratio, erythrocyte sedimentation rate (ESR) and biochemical such as serum glucose (GLU), protein (PRO), cholesterol and urea (UR) of seven teleost fish species were determined. Statistical analysis confirmed that differences in haematological parameters between all the species were (P<0.01) significant. The result revealed that RBC, RBC/WBC ratio, HCT, HB, ESR, PRO, GLU and UR was significantly correlated at P<0.05 level. RBC/ WBC level was more due to the decrease in WBC during the study. These differences can be attributed to the physiological acclimatisation of the fish to their living conditions and feeding regime, which influences the energy metabolism and consequently, the health of the fish.

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Hemoglobin level, metabolic rate and swimming performance in triploid brook trout (Salvelinus fontinalis)

Cited by 14 publications

References 11 publications

Standard Metabolic Rate (SMR) is inversely related to erythrocyte and genome size in allopolyploid fish of the Cobitis taenia hybrid complex

Standard Metabolic Rate (SMR) is inversely related to erythrocyte and genome size in allopolyploid fish of the Cobitis taenia hybrid complex

Changes in water temperature and oxygen: the effect of triploidy on performance and metabolism in large farmed Atlantic salmon

Comparative investigation on haematological and biochemical studies on wild marine teleost fishes from Vellar estuary, southeast coast of India

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