Application of thyroid and steroid hormones as anabolic agents in fish culture

Higgs, David A.; Fagerlund, U. H. M.; Eales, J.G.; McBride, J. R.

doi:10.1016/0305-0491(82)90206-1

Cited by 160 publications

(130 citation statements)

References 141 publications

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“…For example, in salmonids slowly increasing circulating androgen levels were related to accelerated growth, while the rapidly increasing or high androgen levels coincided with low growth rate, even in stages where fish are believed to feed normally. This is in agreement with results obtained during treatment with exogenous steroids: Androgens have the most potent growth promoting effect (reviews by Donaldson et al 1979;Jalabert et al 1982;Higgs et al 1982), even at very low dosage (1 to 10 ng testosterone/g feed, Lewis and Sower 1992). However, these effects are reduced or even reversed when high doses or longer treatments are applied GnRH M) Fig.…”

Section: ) Steroidssupporting

confidence: 89%

Growth hormone (GH) and reproduction: a review

Gac

Blaise

Fostier

et al. 1993

Fish Physiol Biochem

172

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ResumeLes interactions entre les fonctions de croissance et de reproduction mises en evidence chez de nombreux vert6br6s, sont particulierement aigiies A certaines tapes du cycle vital des poissons. Nous d6crivons les interactions endocrines existant entre les axes somatrope et gonadotrope en insistant sur le role jou6 par l'hormone de croissance (GH). L'analyse compare de ces phenomenes chez les mammiferes, les poissons et les amphibiens permet de sugg6rer que la GH joue un rle sp6cifique dans la physiologie de la puberty, la gametog6nese et la fertility. Nous mettons en evidence l'apport original des tudes effectu6es sur le module poisson dans ce champ d'investigation. AbstractInteraction between growth and reproduction occurs in many vertebrates and is particularly obvious at certain stages of the life cycle in fish. Endocrine interactions between the gonadotropic axis and the somatotropic axis are described, the potential role of GH being emphasised. A comparative analysis of these phenomena in mammals, amphibians and fish, suggests a specific role of GH in the physiology of puberty, gametogenesis and fertility. It also shows the original contribution made by studies on the fish model in this field of investigations.

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Section: ) Steroidssupporting

confidence: 89%

Growth hormone (GH) and reproduction: a review

Gac

Blaise

Fostier

et al. 1993

Fish Physiol Biochem

172

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“…Mais l'interaction du stress sur la fonction thyroïdienne des poissons apparaît résulter en des réponses différentes selon l'espèce considérée et la nature et durée du stimulus appliqué. Il s'est avéré que certains stress à court terme tendaient à augmenter la T4 du plasma, avec soit une diminution soit une certaine stabilité de la T3 (PAGNOTTA et al, 1994 ;REDDY et al, 1995), tandis que d'autres stress brefs (REDDING et al, 1984) ou à plus long terme (VIJAYAN et LEATHERLAND, 1989 ;WENDELAAR BONGA, 1993 ;HOLLOWAY et al, 1994) semblaient induire une baisse des teneurs plasmatiques enT4 ou T3, voire une réduction globale de l'activité thyroïdienne (HIGGS et al, 1982).…”

Section: Effets De La Capture Sur Les Hormones Thyroïdiennesunclassified

Réponses Physiologiques De Sept Espèces De Poissons Lacustres À Un Stress De Capture (Filet Maillant Et Épuisette).

Bau

Ferroni-Claverie

Parent

2001

Bull. Fr. Pêche Piscic.

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Les perturbations physiologiques potentiellement liées à la capture des poissons par filet maillant ou par épuisette ont été estimées chez des brochets, sandres, perches, brèmes, chevesnes, carpes et tanches de la retenue hydroélectrique de Pareloup (Aveyron). Toute capture provoque rapidement une hausse significative des taux de catecholamines (>10 ng.ml -1 ), Cortisol (> 100 ng.ml -1 ) et glucose (> 1 g.h 1 ) et une baisse des taux d'hormones thyroïdiennes (< 20 ng.ml -1 ) du plasma chez les sept espèces. Ces réponses physiologiques au stress de capture apparaissent significativement plus marquées suite à la pêche par filet maillant et ce, notamment, chez les espèces carnassières. D'après ces résultats, l'utilisation de filets maillants s'avère inadéquate pour des recherches à court terme sur la physiologie sanguine de populations naturelles de poissons, soulignant ainsi la nécessité après ce type de pêche d'une mise en place d'infrastructures particulières (e.g., viviers, cages flottantes, etc.) pour la phase ultérieure de récupération physiologique.Mots-clés : poisson, retenue, physiologie, stress de capture. PHYSIOLOGICAL RESPONSES OF SEVEN LACUSTRINE FISH SPECIES TO CAPTURE STRESS (GILL NET AND LANDING NET). ABSTRACTThe potential physiological disturbances experienced by fish as a result of capture with gill nets or landing nets were assessed in pike, pikeperch, perch, bream, chub, carp and tench from the hydroelectric reservoir of Pareloup (Aveyron). Capture of fish quickly resulted in both a significant elevation of plasma catecholamine (> 10 ng.ml" 1 ), Cortisol (> 100 ng.ml -1 ) and glucose (> 1 g.l -1 ) levels and a drop in plasma thyroid hormone levels (< 20 ng.ml -1 ) in all species. These physiological stress responses were found to be highly increased following gill-netting, especially in carnivorous species. Hence, these data suggest that the use of gill nets is rather inadequate for short-term researches on blood physiology of ferai fish populations, then attesting to the necessity of settling up experimental facilities (e.g., fish-ponds, floating coops, etc.) following gill-netting to ensure a complete recovery of fish from capture stress.

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“…silvering, changes in body shape, increased saltwater tolerance, change in rheotaxis, cell proliferation in olfactory epithelium, loss of UVS cones and changes in visual pigment gene expression (Allison et al, 2003;Folmar and Dickhoff, 1980;Grau et al, 1982;Higgs et al, 1982;Hoar, 1988;Lema and Nevitt, 2004;McBride et al, 1982;Specker et al, 2000;Staley and Ewing, 1992;Veldhoen et al, 2006). Earlier research established that TH treatment increased the proportion of vitamin A 2 in the VPs of coho and other salmonids (Beatty, 1972).…”

Section: Introductionmentioning

confidence: 99%

Effects of exogenous thyroid hormones on visual pigment composition in coho salmon (Oncorhynchus kisutch)

Temple

Ramsden

Haimberger

et al. 2008

Journal of Experimental Biology

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SUMMARYThe role of exogenous thyroid hormone on visual pigment content of rod and cone photoreceptors was investigated in coho salmon (Oncorhynchus kisutch). Coho vary the ratio of vitamin A 1 -and A 2 -based visual pigments in their eyes. This variability potentially alters spectral sensitivity and thermal stability of the visual pigments. We tested whether the direction of shift in the vitamin A 1 /A 2 ratio, resulting from application of exogenous thyroid hormone, varied in fish of different ages and held under different environmental conditions. Changes in the vitamin A 1 /A 2 visual pigment ratio were estimated by measuring the change in maximum absorbance (λ max ) of rods using microspectrophotometry (MSP). Exogenous thyroid hormone resulted in a longwavelength shift in rod, middle-wavelength-sensitive (MWS) and long-wavelength-sensitive (LWS) cone photoreceptors. Rod and LWS cone λ max values increased, consistent with an increase in vitamin A 2 . MWS cone λ max values increased more than predicted for a change in the vitamin A 1 /A 2 ratio. To account for this shift, we tested for the expression of multiple RH2 opsin subtypes. We isolated and sequenced a novel RH2 opsin subtype, which had 48 amino acid differences from the previously sequenced coho RH2 opsin. A substitution of glutamate for glutamine at position 122 could partially account for the greater than predicted shift in MWS cone λ max values. Our findings fit the hypothesis that a variable vitamin A 1 /A 2 ratio provides seasonality in spectral tuning and/or improved thermal stability of visual pigments in the face of seasonal environmental changes, and that multiple RH2 opsin subtypes can provide flexibility in spectral tuning associated with migration-metamorphic events.

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Application of thyroid and steroid hormones as anabolic agents in fish culture

Cited by 160 publications

References 141 publications

Growth hormone (GH) and reproduction: a review

Growth hormone (GH) and reproduction: a review

Réponses Physiologiques De Sept Espèces De Poissons Lacustres À Un Stress De Capture (Filet Maillant Et Épuisette).

Effects of exogenous thyroid hormones on visual pigment composition in coho salmon (Oncorhynchus kisutch)

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