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Preliminary investigations of the physiological adjustments associated with compensatory growth in juvenile brook charr ( Salvelinus fontinalis ).
- Source :
-
Journal of Applied Aquaculture . 2017, Vol. 29 Issue 1, p16-32. 17p. - Publication Year :
- 2017
-
Abstract
- Various physiological factors suspected to govern or be influenced by growth or feed intake of brook charr (80–120 g) were examined under long and short fasting periods during the year. A control (fed to satiation) was included. During winter, fasting (14 and 28 days) followed by refeeding led to a complete compensation. In summer, longer fasting (39 and 61 days) was applied to exacerbate the physiological response. Compensatory growth was observed in the restricted groups, and overall, adjustments/variations in growth and physiological indicators (feed conversion ratio, organosomatic index, enzymatic activities [CS, TRY, CHY]) were more pronounced. Degree of compensation reached was positively related to the deprivation duration. The summer experiment clearly suggests that compensatory growth takes place in two stages after a long starvation period (61 days): (1) restoration of the digestive system (PSI) followed by enzyme activities (trypsin and chymotrypsin) and (2) rebuilding of somatic tissues. [ABSTRACT FROM PUBLISHER]
- Subjects :
- *BROOK trout
*FISH growth
*FISH feeds
*CHYMOTRYPSIN
*FISH physiology
Subjects
Details
- Language :
- English
- ISSN :
- 10454438
- Volume :
- 29
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Journal of Applied Aquaculture
- Publication Type :
- Academic Journal
- Accession number :
- 121307535
- Full Text :
- https://doi.org/10.1080/10454438.2016.1269531