geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Effects of sublethal concentrations of lignosulphonates on growth, intestinal flora and some digestive enzymes of rainbow trout (Salmo gairdneri)


, : Effects of sublethal concentrations of lignosulphonates on growth, intestinal flora and some digestive enzymes of rainbow trout (Salmo gairdneri). Aquaculture 12(4): 327-335

Young S. gairdneri were exposed to lignosulfonates (LS [environmental pollutants]) at concentrations of 0, 40, 80, 160, 320, 640, 1280 and 1920 ppm for 35 or 60 days. At concentrations of 160 ppm LS and higher the growth rates were slower. The higher concentrations had the most retarding effect on growth, but a clear general relationship between LS concentration and growth retardation was not observed. The bacterial flora in the digestive tract of the fish was examined. The predominant micro-organisms were flavobacteria, bacilli, streptococci and yeasts (Cryptococcus spp.), which were also isolated from the diet. There were about 10,000 viable aerobic and 1000 anaerobic bacteria/g of intestinal contents. There was no significant difference in quantitative or qualitative composition of the intestinal flora of the different groups. The following groups of digestive enzymes were studied: proteinases, amylases, lipases and DNases. The activities of proteinases and nucleases were significantly impaired in fish exposed to concentrations of 1280 ppm LS and higher, and those of amylases at concentrations of 320 ppm LS and higher. A possible connection between the reduced growth rates and depressed activities of the digestive enzymes is discussed, but no firm conclusion regarding the mechanism by which LS effects fish growth can be made.

US$19.90

DOI: 10.1016/0044-8486(77)90211-3


Other references

Miller, K.J.; Lorden, E.R.; Hammett, E.; Ibrahim, M.M.; Quiles, C.; Selim, A.; Leong, K.W.; Levinson, H., 2014: Abstract 166: electrospun synthetic scaffolds: a biomimetic approach to prevent hypertrophic scar contraction. Plastic and Reconstructive Surgery 133(3 Suppl): 182-183

Yoerger D.; Bradley A.M.; Bachmayer R.; Catanach R.; Duester A.R.; Liberatore S.P.; Singh H.; Walden B.; Tivey M.A., 1995: Near-bottom magnetic surveys of the Coaxial Ridge Segment, Juan de Fuca Ridge, using the Autonomous Benthic Explorer survey vehicle. Eos, Transactions, American Geophysical Union 76(46, Suppl

McConnell Duncan, 1970: Crystal chemistry of bone material; hydrated carbonate apatites. Francolite, dahllite, relationship between composition and unit-cell dimension (a).

Azoubel, G.; Nascimento, B.; Ferri, M.; Rizoli, S., 2008: Operating room use of hypertonic solutions: a clinical review. Hyperosmotic-hyperoncotic solutions have been widely used during prehospital care of trauma patients and have shown positive hemodynamic effects. Recently, there has been a growing interest in intra-operative use of hypertonic solutions. We review...

Kameda, S.; Naito, S.; Tanaka, K.; Kajiyama, K.; Kunihiro, K.; Nishiguori, S.; Jimi, S.; Yanase, T., 1982: HLA antigens of patients with systemic lupus erythematosus in Japan. Tissue Antigens 20(3): 221-222

Glenting, P., 1983: Cerebral paresis in Eastern Denmark 1965-1974. IV. The significance of perinatal factors in dyskinetic cases. Report number X from the Cerebral Palsy Registry. Ugeskrift for Laeger 145(18): 1407-1413

Ahoor, M.H.; Amizadeh, Y.; Sorkhabi, R., 2016: Achondroplasia and Macular Coloboma. Achondroplasia is an autosomal dominant congenital disorder of enchondral ossification. It is clinically characterized by low stature, craniofacial deformity, and vertebral malformation. Associated ophthalmic features include telecanthus, exotropi...

Lin, S.; Huang, Y., 1995: Organ distribution of receptor for advanced glycation end products mRNA and the effect of hyperglycemia on it. Journal of the American Society of Nephrology 6(3): 1043

Kozinka, V.; Klenovska, S., 1965: The uptake of mannitol by higher plants. Experiments with young Hordeum sativum and Helianthus annuus plants showed that in the excretion of mannitol in the guttation liquid observed by Groenewegen and Mills (1960) after uptake by the root system of plants, the osmotic concentration of m...

Rast Nicholas; Skehan James W., 1993: Mid-Paleozoic orogenesis in the North Atlantic; the Acadian orogeny. Special Paper - Geological Society of America 275: 1-25