Physiological and biochemical basis of salmon young fishes migratory behavior

Martemyanov, V. I.; Oblast, Yaroslavl

doi:10.12980/jclm.4.2016j5-213

Cited by 1 publication

(1 citation statement)

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“…During smoltification, the kidney, gill, intestine and other osmoregulatory tissues, will pre-adapt for life in seawater, while the fish is still in freshwater (Hoar 1988;Talbot et al 1992;Martemyanov 2016). Thus, all structural features of the trunk kidney in smolts are cytological markers of the migration process.…”

Section: R a F Tmentioning

confidence: 99%

Microanatomy and ultrastructure of kidney interstitial cells and nephron in brown trout (Salmo trutta) at different stages of the life cycle

et al. 2022

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The study focuses on the microanatomy and ultrastructural changes in the trunk kidney interstitium cells and nephrons in parr, smolt and spawning brown trout Salmo trutta Linnaeus, 1758 sampled in Luga River and Solka River, the tributaries of the Baltic Sea. Regardless of the type of cells or their structure, there were changes in their areas and the number and structure of organelles responsible for the transport, synthetic and energetic function of cells. Our data on the morphology of the nephron combined with data on its physiology suggest a fundamental change in kidney function during the parr-smolt transformation before migration; this could be a preadaptation for a successful life in saltwater where urine output is sharply reduced. Thus, detected structural features of the trunk kidney in brown trout S. trutta are cytological markers of the migration process. The numbers of lymphocytes, neutrophils and eosinophils with segmented nuclei increased from parr to smolts and then to spawners; only monotypic specific granules in neutrophils were found in smolts and spawners. Cells with radially arranged vesicles were described for the first time in brown trout S. trutta renal interstitium. Their origin has not yet been established. The shape of these cells changed from spherical to trihedral during fish maturation. All the above ultrastructural changes of renal interstitium cells could be considered cytological markers of cell maturity.

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Section: R a F Tmentioning

confidence: 99%