Progressive changes in haematology and tissue water of sexually mature trout, <i>Salmo gairdneri</i> Richardson during the autumn and winter

Lane, H. C.

doi:10.1111/j.1095-8649.1979.tb03626.x

Cited by 54 publications

(30 citation statements)

References 27 publications

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“…Oncorhyncus aquabonita (truta) (61900 -62900 cel/µL) (HRUBEC et al, 1996). No bagre tropical Clarias lazera ocorre aumento de leucócitos totais no período de verão, quando é maior a temperatura e o período de luz nas regiões tropicais (SHABANA et al, 1990 trutas, salmolídeos, carpas e tilápias (LANE, 1979;IWAMA et al, 1986;SPECKNER et al, 1989;HRUBEC et al, 2000, respectivamente). Segundo HRUBEC et al (1996) o número de eritrócitos varia de acordo com a necessidade de oxigênio.…”

Section: E Emunclassified

Estresse de transporte em cascudos amazônicos ornamentais Cochliodon sp. (L145) e Hypostomus sp. (L28) (LORICARIIDAE)

et al. 2016

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In this study was evaluated the hematological response of ornamental Amazon plecos Cochliodon sp. (L145) and Hypostomus sp. (L28) submitted to transportation conditions. The erythrogram, leukogram, thrombogram, glucose and total plasma proteins (PPT) were determined at 0, 6, 24, 48 and 72 hours after 3-hours simulated transportation. For basal hematological profile, the blood was collected immediately to allow comparisons after the transport stress. Cochliodon sp. showed reduction in total erythrocyte after 6 and 24 hours of post-transport, and increase after 6 hours. Hypoglycemia were observed at 6 hours post-transport for Hypostomus sp. Thus, the Hypostomus sp. showed higher resistance compared to Cochliodon sp. when to the transport stress.

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Section: E Emunclassified

Estresse de transporte em cascudos amazônicos ornamentais Cochliodon sp. (L145) e Hypostomus sp. (L28) (LORICARIIDAE)

et al. 2016

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“…Chez les poissons, I'hématocrite semble avoir des valeurs relativement constantes qui ne paraissent varier ni en fonction de la température (Parent et al, 1976 ; Lane, 1979 ;Sandnes et al, 1988) ou de la photopériode (Lane, 1979 ;Sandnes et al, 1988) ni en fonction du régime alimentaire, notamment de sa richesse en protéines (Zeitoun et al, 1974 ;Hemre et al, 1991 ;Plisetskaya et al, 1991). Toutefois, des modifications de ce paramètre ont été signalées lors d'un état de stress (Fletcher, 1975;Van Vuren et Hattingh, 1978;Witters et al, 1990;Wells et Weber, 1991).…”

Section: Hématocriteunclassified

Recherches sur l'état physiologique des poissons de la retenue de Pareloup : données relatives à cinq années d'étude

et al. 1994

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Résumé. -L'état physiologique des poissons a été estimé, pour une part, par l'évaluation mensuelle, au cours de quatre années (1984, 1989, 1990, 1991), de caractéristiques morphophysiologiques et de la composition somatique chez deux espèces différant par leur régime alimentaire : la perche et le gardon. Les valeurs obtenues ont démontré qu'il y a certaines années (1984, 1989), en été, un ralentissement de la croissance pondérale, une diminution ou un arrêt de l'accrétion protéique accompagné d'une modification de la concentration d'acides aminés ainsi qu'une chute de la teneur en lipides somatiques. Ces résultats indiquent nettement l'existence, dans la retenue de Pareloup, de conditions nutritionnelles plus ou moins favorables aux populations pisciaires, durant la période estivale. Par ailleurs, la détermination de paramètres sanguins, au cours d'un cycle annuel (1992)(1993), chez plusieurs espèces de poissons (brème, chevesne, brochet, sandre, perche) a révélé que si la valeur de l'hématocrite, la cholestérolémie, la triglycéridémie et la protéinémie sont, d'une manière générale, relativement stables, la glycémie varierait avec la photopériode et le taux d'insuline circulante serait en relation avec le cycle sexuel, pour la plupart des espèces.Mots-clés. -Poissons, retenue, composition somatique, paramètres sanguins.Abstract. -The physiological state of fish was first assessed by monthly evaluation in four years (1 984, 1989, 1990, 1991) of certain morphophysiological characteristics and of somatic composition in two species (perch and roach) with different dietary habits. In 1984 and 1989, a slowing down in weight gain, a decrease or an interruption in protein accretion associated with changes in amino acid contents, and a fall in somatic lipid levels were observed in summer. These results clearly point to dietary conditions 258 F. Vellas et al.in Pareloup Reservoir which are more or less favorable to fish populations during this period. In addition, blood parameter rneasurernents, carried out frorn 1992 to 1993 in various fish species (bream, chub, pike, pike-perch, perch), generally showed relatively unchanged values for hematocrit and plasma cholesterol, triglyceride and protein contents, while plasma glucose levels appeared dependent on the photoperiod and circulating insulin rates on the reproductive cycle, for most species.

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“…Agedependent decreases in activity levels therefore seem to be widespread at both the transcriptional and functional levels. Erythropoietic activity and the release of newly synthesized RBCs into the circulation is reduced in rainbow trout during the winter (Lane, 1979), and in Baltic salmon (Salmo salar) the proportion of immature cells in circulation decreases during the winter (Härdig and Höglund, 1984). Seasonal changes in the age profile of the circulating RBCs make the age dependency of the RBC β-adrenergic volume response and enzyme activities of great interest in the interpretation of seasonal changes in RBC function.…”

Section: Seasonal Variations In βνηε Activitymentioning

confidence: 99%

Seasonality of the red blood cell stress response in rainbow trout(Oncorhynchus mykiss)

Koldkjær

Pottinger

Perry

et al. 2004

Journal of Experimental Biology

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The β-adrenergic stress response in red blood cells (RBCs) of rainbow trout shows seasonal changes in expression. We have explored the mechanisms underpinning this response by following, over a period of 27·months, changes in β-adrenergic receptor (β-AR) binding characteristics, β-adrenergically stimulated RBC Na + /H + exchanger (βNHE) activity, together with β-AR and βNHE mRNA levels and plasma steroid hormone and lactate levels. These parameters were measured at approximately monthly intervals in a single population of fish held under semi-natural conditions. Membranebound, high-affinity β-ARs were present in RBCs at all sampling times, varying from 668±112·receptors·cell -1 to 2654±882·receptors·cell -1 (mean ± S.E.M.; N=8). βNHE activity, however, was reduced by 57% and 34% in December 1999 and February 2001, respectively, compared with an otherwise sustained influx that averaged 110.4±2.3·mmol·l -1 ·RBCs·h -1 (N=119). Only one reduction coincided with a spawning period but both were preceded by transient increases in circulating testosterone. βNHE activity measured under standard conditions was not correlated with the number or affinity of β-ARs nor with water temperature, but both β-AR numbers and βNHE activity were positively related to their respective mRNA levels (P=0.005 and 0.038, respectively). Pharmaceutical intervention in the transduction cascade linking the β-AR and βNHE failed to indicate any failure of the transduction elements in RBCs displaying low βNHE activity. Similarly, we failed to demonstrate any link between seasonal cortisol fluctuations and seasonally reduced βNHE activity. However, the βNHE activity of age-separated RBC fractions showed that younger RBCs had a significantly higher βNHE response than older RBCs, consistent with the seasonal reductions in βNHE being linked to turnover of RBCs and erythropoiesis. Testosterone is known to induce erythropoiesis and we conclude that seasonal reductions in βNHE are not caused by changes in β-AR numbers but may be linked to testosterone-induced erythropoiesis.

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Progressive changes in haematology and tissue water of sexually mature trout, Salmo gairdneri Richardson during the autumn and winter

Cited by 54 publications

References 27 publications

Estresse de transporte em cascudos amazônicos ornamentais Cochliodon sp. (L145) e Hypostomus sp. (L28) (LORICARIIDAE)

Estresse de transporte em cascudos amazônicos ornamentais Cochliodon sp. (L145) e Hypostomus sp. (L28) (LORICARIIDAE)

Recherches sur l'état physiologique des poissons de la retenue de Pareloup : données relatives à cinq années d'étude

Seasonality of the red blood cell stress response in rainbow trout(Oncorhynchus mykiss)

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