Changes in plasma and muscle free amino acids in atlantic salmon (Salmo salar) during absorption of diets containing different amounts of hydrolysed cod muscle protein

Octopus vulgaris can be forced into precocious maturity by removal of the subpedunculate lobe from the brain, an operation that releases the optic glands from inhibition, and allows them to secrete a gonadotropin. 14C-leucine was injected into the bloodstream of immature animals and its subsequent incorporation into muscle protein followed by taking successive samples from the arms. The optic glands were then activated, and a further injection of 3H-leucine given and followed by means of further arm samples. Optic gland secretion suppresses protein synthesis in the muscles. This is associated with an increase in the total amino acid pool in the muscles and with a considerable increase in the concentration of free amino acids circulating in the blood. If an ovary is present these events are associated with a rapid growth of the ovary and its ducts, and a loss of weight elsewhere. In ovariectomized animals the ducts grow, but there is no yolk to absorb the large pool of free amino acids, and the animals gain weight by osmotic uptake of water into the muscles. The developing ovary may produce a hormone that increases the release of amino acids from muscle, since the concentration circulating in the blood of intact animals remains at least as high as in ovariectomized octopuses, despite the demands of the developing ovary. These matters are discussed in relation to other evidence for a gonadial hormone and in relation to the ‘self-destruct’ effect of the optic gland secretion in determining the post-reproductive death of octopuses.

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Sensitivity of brown trout (Salmo trutta L.) and Atlantic salmon (Salmo salar L.) fry to amino acids at the start of exogenous feeding

Aquaculture ◽

10.1016/0044-8486(86)90114-6 ◽

1986 ◽

Vol 55 (3) ◽

pp. 191-200 ◽

Cited By ~ 36

Author(s):

Kathryn J. Mearns

Keyword(s):

Amino Acids ◽

Atlantic Salmon ◽

Salmo Salar ◽

Brown Trout ◽

Salmo Trutta ◽

Exogenous Feeding ◽

Atlantic Salmon Salmo Salar ◽

Brown Trout Salmo Trutta

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Electrical Responses of the Olfactory Epithelium of Atlantic Salmon (Salmo salar)

Journal of the Fisheries Research Board of Canada ◽

10.1139/f71-080 ◽

1971 ◽

Vol 28 (4) ◽

pp. 565-572 ◽

Cited By ~ 122

Author(s):

A. M. Sutterlin ◽

N. Sutterlin

Keyword(s):

Amino Acids ◽

Atlantic Salmon ◽

Salmo Salar ◽

Olfactory Epithelium ◽

Spike Activity ◽

Olfactory Mucosa ◽

Oscillatory Activity ◽

Atlantic Salmon Salmo Salar ◽

Low Concentrations ◽

Complex Solutions

Multiunit spike activity was recorded from the olfactory mucosa of Atlantic salmon (Salmo salar) using metal-filled glass microelectrodes. A number of simple and complex solutions were tested for stimulatory effectiveness. Amino acids as a class of compounds were highly stimulatory; little or no response was obtained to a variety of simple sugars, n-aliphatic acids, alcohols, or amino-substituted alcohols. An increase in asynchronous spike activity was evoked by low concentrations of amino acids and oscillatory activity was evoked by higher concentrations of amino acids. Brief treatment of the epithelium with dilute solutions of HgCl2 blocked the chemosensitivity of the receptors.

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Apparent digestibility of nutrients, energy, essential amino acids and fatty acids of juvenile Atlantic salmon (Salmo salar L.) diets containing whole-cell or cell-ruptured Chlorella vulgaris meals at five dietary inclusion levels

Aquaculture ◽

10.1016/j.aquaculture.2017.08.018 ◽

2017 ◽

Vol 481 ◽

pp. 25-39 ◽

Cited By ~ 29

Author(s):

Sean M. Tibbetts ◽

Jason Mann ◽

André Dumas

Keyword(s):

Amino Acids ◽

Fatty Acids ◽

Atlantic Salmon ◽

Salmo Salar ◽

Chlorella Vulgaris ◽

Essential Amino Acids ◽

Apparent Digestibility ◽

Whole Cell ◽

Atlantic Salmon Salmo Salar ◽

Juvenile Atlantic Salmon

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Studies of the chemical composition of a healing skin wound in rats, and of the concentrations of some constituents of tissues distant from the healing wound

Biochemical Journal ◽

10.1042/bj1020767 ◽

1967 ◽

Vol 102 (3) ◽

pp. 767-773 ◽

Cited By ~ 11

Author(s):

J Candlish ◽

N. Chandra

Keyword(s):

Amino Acids ◽

Ascorbic Acid ◽

Free Amino Acids ◽

Free Amino ◽

Muscle Protein ◽

Skin Wound ◽

Neutral Salt ◽

Polythene Tube ◽

Healing Wound ◽

Muscle Water

1. A skin lesion was made in rats by dorsal incision and the insertion of a polythene tube. 2. Over a period of 25 days after wounding, assays were performed for ascorbic acid, DNA, hydroxyproline, methionine, tryptophan, tyrosine and free amino acids in the lesion tissue. 3. The neutral-salt-soluble proteins of the lesion tissue were fractionated on DEAE-Sephadex, with the separation of fibrinogen and gamma-globulin from a serum protein fraction. 4. Over a period of 20 days after wounding, in wounded rats and in controls, assays were conducted for: ascorbic acid in lens and liver, hydroxyproline, soluble protein, methionine and water in muscle and tendon, and free amino acids in muscle. 5. Relative to controls there was a decrease in lens and liver ascorbic acid, a rise in tendon hydroxyproline, a rise in muscle free amino acids, a fall in muscle protein and a rise in tendon and muscle water.

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