L. B. Agellon and T. T. Chen, Rainbow trout growth hormone: Molecular cloning of cDNA and expression in Escherichia coli, DNA, vol.5, pp.463-471, 1986.

L. B. Agellon, S. L. Davies, T. T. Chen, and D. A. Powers, Structure of a fish (rainbow trout) growth hormone gene and its evolutionary implications, Roc. Natl. Acad. Sci. U.S.A, pp.855136-5140, 1988.

L. B. Agellon, C. J. Emery, J. M. Johns, S. L. Davies, and A. D. ,

T. T. Dingle and . Chen, Promotion of rapid growth of rainbow trout (Salmo gairdneri) by a recombinant fish growth hormone, Can. J. Fish. Aquat. Sci, vol.45, pp.146-151, 1988.

T. Bergeron, Ultrastructural and Histochemical Assessment of the Granule Cells of the Rainbow Trout ( S a l m gairdneri) Small Intestine, 1982.

T. Bergeron and B. Woodward, The development of the stratum granulosum of the small intestine of the rainbow trout (Salmo gairdneri), Can. J. Zool, vol.60, pp.1513-1516, 1982.

T. Bergeron and B. Woodward, Ultrastructure of the granule cells in the small intestine of the rainbow trout (Salmo gairdneri) before and after stratum granulosum formation, Can. J . Zool, vol.61, pp.133-138, 1983.

J. P. Bolton, G. Young, R. S. Nishioka, T. Hirano, and H. A. Bern, Plasma growth hormone levels in normal and stunted yearling coho salmon, Oncorhynchus Kisutch, J . Exp. Zool, vol.242, pp.379-382, 1987.

D. Chourrout, R. Guyomard, and L. M. Houdebine, High efficiency gene transfer in rainbow trout ( S a l m gairdneri Rich.) by microinjection into egg cytoplasm, Aquaculture, vol.51, pp.143-150, 1986.

J. H. Davina, G. T. Rijkers, J. H. Rombout, L. P. Timmermans, and W. B. Van-muiswinkel, Lymphoid and non-lymphoid cells in the intestine of cyprinid fish. In: Development and Differentiation of Vertebrate Lymphocytes, pp.129-140, 1980.

E. M. Donaldson, U. H. Fagerlund, D. A. Higgs, and J. R. Mcbride, Hormonal enhancement of growth, vol.VIII, pp.455-597, 1979.

R. A. Dunham, J. Eash, J. Askins, and T. M. Townes, Transfer of the metallothionein-human growth hormone fusion gene into channel catfish, Trans. Am. Fish. SOC, pp.116237-91, 1987.

D. N. Ezeasor, The structure and functional significance of stratum compactum in the gut of the rainbow trout (Salmo gairdneri, Rich.), Z. Mikrosk. Anat. Forsch, vol.100, pp.536-544, 1986.

D. N. Ezeasor and W. M. Stokoe, A cytochemical, light and electron microscopic study of the eosinophilic granule cells in the gut of the rainbow trout, Salmo gairdneri Richardson, J. Fish Biol, vol.17, pp.619-634, 1980.

U. Georgopoulou and J. M. Vernier, Local immunological response in the posterior intestinal segment of the rainbow trout after oral administration of macromolecules, Dev. Comp. Immunol, vol.10, pp.529-537, 1986.

U. Georgopoulou, M. F. Sire, and J. M. Vernier, Macromolecular absorption of proteins by epithelial cells of the posterior intestinal segment and their intracellular digestion in the rainbow trout, Biol. Cell, vol.53, pp.269-282, 1985.

U. Georgopoulou, M. F. Sire, and J. M. Vernier, Immunological demonstration of intestinal absorption and digestion of macromolecules in the trout (Salrno guirdneri), Cell Tissue Res, vol.245, pp.387-395, 1986.

U. Georgopoulou, K. Dabrowski, M. F. Sire, and J. M. Vernier, Absorption of intact proteins by the intestinal epithelium of trout, Salmo gairdneri. A luminescence enzyme immunoassay and cytochemical study, Cell Tissue Res, vol.251, pp.145-152, 1988.

P. Gerasimo, J. Djiane, and P. A. Kelly, Titration of total binding site for growth hormone in rabbit liver. Quantitative modifications of these sites during pregnancy, Mol. Cell. Endocrinol, vol.13, p.23, 1979.

P. A. Gonella, K. Siminoski, R. A. Murphy, and M. R. Neutra, Transepithelial transport of epidermal growth factor by absorptive cells of the suckling rat ileum, J. Clin. Invest, vol.80, pp.22-32, 1987.

H. Kawauchi, S. Moriyama, A. Yasuda, K. Yamaguchi, and K. ,

J. Shirahata, T. Kubota, and . Hirano, Isolation and characterization of chum salmon growth hormone, Arch. Biochem. Biophys, 1986.

N. Kimura and S. Kudo, Fine structure of the stratum granulosum of the pyloric caeca of the rainbow trout, Jpn. J. Ichthyol, vol.22, pp.16-22, 1975.

C. H. Lamers, The Reaction of the Immune System of Fish to Vaccination, 1985.

L. Bail, P. Y. , G. Boulard, B. Barenton, and M. Zigmunt, Purification of chinook salmon (Oncorhynchus tshawytscha) GH for receptor study, Fish Physiol. Biochem, 1989.

E. Mclean and R. Ash, The time-course of appearance and net accumulation of horseradish peroxidase (HRP) presented orally to juvenile carp Cyprinus carpio (L.), Comp. Biochem. Physiol, vol.84, pp.687-690, 1986.

E. Mclean and R. Ash, The time-course of appearance and net accumulation of horseradish peroxidase presented orally to rainbow trout Salmo guirdneri, 1987.

. Comp, Biochem. Physiol, vol.88, pp.507-510

J. A. Moore, S. A. Pletcher, and M. J. Ross, Absorption enhancement of growth hormone from the gastrointestinal tract of rats, Int. J. Pharm, vol.34, pp.35-43, 1986.

C. S. Nicoll, Radioimmunoassay and radioreceptor assay for prolactin and growth hormone: A critical appraisal, Am. Zool, vol.15, pp.881-903, 1975.

C. S. Nicoll, S. S. Steiny, D. S. King, R. S. Nishioka, and G. L. ,

N. L. Mayer, J. D. Eberhard, M. K. Baxter, J. A. Yamanaka, J. J. Miller et al., The primary structure of the coho salmon growth hormone and its cDNA, Gen. Comp. Endocrinol, vol.68, pp.387-399, 1987.

J. Noaillac-depeyre and N. Gas, Electron microscopic study on gut epithelium of tench (Tinca tinca) with respect to its absorptive functions, Tissue Cell, vol.8, pp.511-530, 1976.

R. J. Roberts, A. Mcqueen, U. M. Shearer, and H. Young, The histopathology of salmon tagging. 11. The chronic tagging lesion in returning adult fish, J. Fish Biol, vol.5, pp.615-619, 1973.

J. H. Fbmbout, C. H. Lamers, M. H. Helfrich, A. Dekker, and J. J. Taverne-thiele, Uptake and transport of intact macromolecules in the intestinal epithelium of carp (Cyprinus carpio L.) and the possible immunological implications, Cell Tissue Res, vol.239, pp.519-530, 1985.

S. Sekine, T. Mizukami, T. Nishi, Y. Kuwana, A. Saito et al., Cloning and expression of cDNA for salmon growth hormone in Escherichia coli, Proc. Natl. Acad. Sci. U.S.A, vol.82, pp.4306-4310, 1985.

J. Shimmins, F. C. Gillespie, J. S. Orr, D. A. Smith, and W. ,

A. , The measurement of enteric absorption rate using a double tracer technique, Adv. Biosci, vol.5, pp.157-167, 1969.

K. Siminoski, P. Gonnella, J. Bernanke, L. Owen, M. Neutra et al., Uptake and transepithelial transport of nerve growth factor in suckling rat ileum, J. Cell Biol, vol.103, pp.1979-1990, 1986.

M. F. Sire, P. Y. Le-bail, U. Georgopoulou, and J. M. Vernier, Transfert transepithelial de proteines au niveau de l'intestin posterieur chez Salmo gairdneri, Biol. Cell, vol.63, p.24, 1988.

Y. Suzuki, M. Kobayashi, K. Aida, and I. Hanyu, Transport of physiologically active salmon gonadotropin into the circulation in goldfish, following oral administration of salmon pituitary extract, J. Comp. Physiol. B, 1988.

J. M. Wilson, J. A. Whitney, and M. R. Neutra, Identification of an endosomal antigen specific to absorptive cells of suckling rat ileum, J . Cell Biol, vol.105, pp.691-703, 1987.

B. Woodward and T. Bergeron, Protein histochemistry of the granule cells in the small intestine of the rainbow trout, Salmo gairdneri Richardson, J. Fish Biol, pp.24-453, 1984.

A. Zapata, Ultrastructure of the gut associated lymphoid tissue GALT of Rutilus rutilus, Morf. Normal y Patolog, vol.3, pp.22-39, 1979.

Y. Zohar, Dorsal aorta catheterization in rainbow trout (Salmo gairdneri). I. Its validity in the study of blood gonadotropin patterns, Reprod. Nutr. Dev, vol.20, pp.1811-1823, 1980.

Y. Zohar, L'Evolution de la Pulsatilite et des Cycles Nycthembraux de la Secretion Gonadotrope chez la Truite Arc-en-ciel Femelle, en Relation avec le Cycle Sexuel Annuel et par Rapport a l'Activite Stkroidogene de 1'Ovaire, vol.157, pp.753-758, 1982.