Endocrine control of nutrition in cyclostomes and fish

Murat, J.C.; Plisetskaya, E. M.; Woo, Norman Y.S.

doi:10.1016/0300-9629(81)90335-2

Cited by 63 publications

(18 citation statements)

References 51 publications

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“…This finding is consistent with the idea that insulin is an important anabolic hormone in fish (cf., Murat et al 1981;Christiansen and Klungsoyr 1987;Mommsen and Plisetskaya 1990). Moreover, Bern (1978)and Plisetskaya el al.…”

Section: Discussionmentioning

confidence: 95%

Plasma levels of insulin, glucagon and glucagon-like peptide in salmonids of different weights

Sundby¹,

Eliassen²,

Refstie

et al. 1991

Fish Physiol Biochem

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Plasma levels of insulin in rainbow trout,Oncorhynchus mykiss, Atlantic salmon,Salmo salar, and Pacific coho salmon,Oncorhynchus kisutch and plasma circulating levels of glucagon and glucagon-like peptide, in rainbow trout and Atlantic salmon, were measured by homologous radioimmunoassays. Hormonal levels were compared against the average body weight of the same group of fish. Plasma insulin levels were significantly correlated (r=0.56, 0.46 and 0.42 respectively) with body weight in all three salmonid species. Moreover, rainbow trout from fast-growing families had significantly higher (p<0.005) plasma insulin levels than did fish from slow-growing families. Plasma titres of glucagon and glucagon-like peptide were always lower than insulin titres and did not correlate with body weight.

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Section: Discussionmentioning

confidence: 95%

Plasma levels of insulin, glucagon and glucagon-like peptide in salmonids of different weights

Sundby¹,

Eliassen²,

Refstie

et al. 1991

Fish Physiol Biochem

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“…13). Ces valeurs de protéinémie correspondent à celles obtenues, en laboratoire, chez des poissons à jeun de 24 h (environ 20 911 chez la carpe, Creach, 1972) ou nourris (38 + 3 gll chez la truite, Alexis et al, 1986;40 + 2 gll chez la brème, Murat et al,, 1981), et elles pourraient ainsi être reliées au stade postprandial où se trouvent les animaux au moment de leur capture. De fait, nous avons constaté que, chez les carnassiers et chez le chevesne, des individus d'une même population, capturés au même moment et au même endroit, ne sont jamais dans une même phase digestive; quelle que soit la période étudiée, nous n'avons jamais eu d'animaux ou tous à jeun ou tous bien alimentés.…”

Section: Protéinémieunclassified

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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“…Furthermore, plasma insulin levels in fish change during the annual cycle and in several species the highest values were found during the prespawning stage (Murat et al 1981;Guti6rrez et al 1987Guti6rrez et al , 1988. But there are few reports on the role of insulin in fish ovarian physiology.…”

Section: Introductionmentioning

confidence: 96%

Insulin and IGF-I receptors and tyrosine kinase activity in carp ovaries: changes with reproductive cycle

Gutiérrez

Parrizas

Carneiro

et al. 1993

Fish Physiol Biochem

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Insulin and insulin-like growth factor I (IGF-I) receptors from carp ovaries were semipurified with wheat germ agglutinin at different moments of the reproductive cycle and their binding characteristics and tyrosine kinase activity were studied. Specific receptors for insulin and IGF-I were found. IGF-I receptors presented higher binding (23.8 ± 1.5%), number of receptors (965 ± 20fm/mg) and affinity (KD 0.24 ± 0.03nM) than those shown for insulin receptors (4.1 ± 1%, 530 ± 85fm/mg and 0.85 ± 0.1nM, respectively). Insulin and IGF-I receptors have a tyrosine kinase activity which is not different from that found in muscle of the same species. Seasonal changes were found in binding, with maximum values for insulin and IGF-I reached at the end of pre-spawning period (June). However, while IGF-I binding was observed in all stages, insulin binding decreased in autumn and disappeared in winter, which suggests a different role for the two peptides in ovarian physiology.

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Endocrine control of nutrition in cyclostomes and fish

Cited by 63 publications

References 51 publications

Plasma levels of insulin, glucagon and glucagon-like peptide in salmonids of different weights

Plasma levels of insulin, glucagon and glucagon-like peptide in salmonids of different weights

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

Insulin and IGF-I receptors and tyrosine kinase activity in carp ovaries: changes with reproductive cycle

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