The influence of sex steroids in commercial fish meals and fish diets on plasma concentration of estrogens and vitellogenin in cultured Siberian sturgeonAcipenser baeri

1989 ◽  
Vol 2 (3) ◽  
pp. 161-168 ◽  
Author(s):  
Catherine Pelissero ◽  
Blandine Cuisset ◽  
Françoise Le Menn
Keyword(s):  
Plasma Concentration ◽  
Sex Steroids ◽  
Commercial Fish ◽  
Fish Diets

Bacterial Counts of Commercial Fish Diets

1971 ◽  
Vol 28 (8) ◽  
pp. 1185-1189 ◽  
Author(s):  
T. J. Trust
Keyword(s):  
Fluorescent Pseudomonads ◽  
Total Count ◽  
Aerobic Bacteria ◽  
Fish Production ◽  
Commercial Fish ◽  
Fish Diets ◽  
Thermophilic Species ◽  
Aerobic And Anaerobic ◽  
Spore Forming Bacteria ◽  
Representative Samples

Two diets formulated and offered for commercial fish production were examined to determine their microbial burden. The total count of aerobic bacteria ranged from 103 to 107 bacteria per gram of diet. The diets contained psychrophilic and thermophilic species and up to 104 aerobic and anaerobic spore-forming bacteria per gram. Enterococci and members of the Enterobacteriaceae, including species of Salmonella, were also present. Fluorescent pseudomonads were detected in 18 of the 47 samples tested, Proteolytic, amylolytic, lipolytic, and haemolytic organisms were shown to be present in measurable numbers. The total viable aerobic count did not change markedly on storage of representative samples at 4, 20, or 30 C.

Induction of vitellogenin production in male tilapia (Oreochromis mossambicus) by commercial fish diets

2009 ◽  
Vol 154 (2) ◽  
pp. 249-254 ◽  
Author(s):  
Lori K. Davis ◽  
Bradley K. Fox ◽  
Chhorn Lim ◽  
Naoshi Hiramatsu ◽  
Craig V. Sullivan ◽  
...  
Keyword(s):  
Oreochromis Mossambicus ◽  
Commercial Fish ◽  
Fish Diets

scholarly journals Impacts of dietary cyanobacteria on fish

2010 ◽  
Vol 58 (4) ◽  
pp. 277-284 ◽  
Author(s):  
Andrea Ziková ◽  
Miroslava Palíková ◽  
Jan Mareš ◽  
Stanislav Navrátil ◽  
Radovan Kopp
Keyword(s):  
Abundant Species ◽  
Oral Route ◽  
Partial Replacement ◽  
Water Bloom ◽  
Fish Diet ◽  
Primary Producers ◽  
Commercial Fish ◽  
Fish Diets ◽  
Short Period ◽  
Nutrition Value

Development of cyanobacterial water bloom became a common issue all over the world. Cyanobacteria are the most important primary producers in aquatic ecosystems but in some abundant species their secondary metabolites called cyanotoxins seem to be harmful for many animal groups especially mammals but also fish. In fishes, adverse effects have been demonstrated in several studies applying cyanotoxins by unnatural injection. However, cyanobacteria and fish coevolved during ages and therefore the question arises whether cyanobacteria might be even used for fish via oral application (fish diet). The use of cyanobacteria for fish diets is varying including applications of pure cyanobacteria biomass as well as incorporation of cyanotoxin containing cyanobacteria biomass into commercial fish diet. The impacts of cyanobacteria in fish diets administered via the oral route revealed contradictory findings ranging from moderate negative to growth promoting impacts and it seems that any bioaccumulation of microcystins can become depurated by rearing fish in clean water for a short period. According to the results obtained from various experiments, cyanobacteria as primary producers might be used as a component of fish diets especially concerning partial replacement of fish meal. However, the determination of nutrition value and the bioavailibility of nutrients present in cyanobacteria for different fish species needs to be determined. Furthermore thorough research is needed to exclude any harmful problem for the final consumers – humans.

TESTOSTERONE AND OESTRADIOL IN DOGS WITH TESTICULAR TUMOURS

1974 ◽  
Vol 77 (2) ◽  
pp. 408-416 ◽  
Author(s):  
F. Comhaire ◽  
D. Mattheeuws ◽  
A. Vermeulen
Keyword(s):  
Plasma Concentration ◽  
Sertoli Cell ◽  
Sex Steroids ◽  
Venous Blood ◽  
Plasma Testosterone ◽  
Testosterone Concentration ◽  
Peripheral Plasma ◽  
Normal Mass ◽  
The Mean ◽  
Sertoli Cell Tumours

ABSTRACT The mean peripheral plasma concentration of oestradiol was found to be increased in 3 dogs with Sertoli cell tumours and in 3 dogs with seminomas, whereas the plasma testosterone showed no difference as compared to a group of dogs without testicular neoplasia. In two thirds of the cases the concentration of oestradiol in the spermatic venous blood draining the neoplastic testes was clearly higher than in the normal dogs. The testosterone concentration in the spermatic venous blood from the tumour bearing testes was lower than in the spermatic venous blood of the contralateral partner testes in the same dogs, though not different from the spermatic venous concentration in the control dogs. There was no correlation between the presence or absence of signs of feminization and the peripheral or spermatic venous concentration of sex steroids. It is concluded that not only Sertoli cell tumours, but also seminomas can secrete increased amounts of oestrogens. This is possibly due to the presence of a larger than normal mass of tissue capable of converting testosterone, or its precursors, to oestradiol.

Changes in the Plasma Pattern of Sex Steroids in Patients with Liver Cirrhosis Treated with Mepartricin

1989 ◽  
Vol 17 (3) ◽  
pp. 212-217 ◽  
Author(s):  
A. Tavanti ◽  
M. Delle Monache ◽  
A. Ulissi ◽  
S. Del Vecchio ◽  
M.A. Rapocci ◽  
...  
Keyword(s):  
Liver Cirrhosis ◽  
Plasma Concentration ◽  
Sex Steroids ◽  
Medical Staff ◽  
Follicle Stimulating Hormone ◽  
The Other ◽  
Cirrhotic Patients ◽  
Stimulating Hormone

Mepartricin was given to cirrhotic patients in order to evaluate its effect on the imbalance of sex steroids which is typical of this disorder. Patients were divided into two groups: one group received placebo ( n=19) and the other received 150000 IU/day mepartricin for 30 days ( n=19). The patients were evaluated by separate medical staff who were unaware of the treatment. Mepartricin significantly decreased the plasma concentration of testosterone, oestradiol and prolactin as compared with the values at the start of the trial, while no significant changes were seen in the occurrence of gynaecomastia. No relevant changes were seen in patients receiving the control, except for a slight increase in the peripheral concentration of androstenedione, aldosterone and follicle stimulating hormone.

scholarly journals Induction of Plasma Vitellogenin Synthesis by the Commercial Fish Diets in Male Goldfish (Carassius auratus) and Dietary Phytoestrogens

2002 ◽  
Vol 48 (5) ◽  
pp. 427-434 ◽  
Author(s):  
Hiroshi Ishibashi ◽  
Makito Kobayashi ◽  
Tomohiko Koshiishi ◽  
Toshihisa Moriwaki ◽  
Katsuyasu Tachibana ◽  
...  
Keyword(s):  
Carassius Auratus ◽  
Commercial Fish ◽  
Goldfish Carassius Auratus ◽  
Fish Diets ◽  
Vitellogenin Synthesis

scholarly journals Review on using of housefly maggots (Musca domestica) in fish diets

2020 ◽  
Vol 2 (4) ◽  
Author(s):  
Hamed H.E. Saleh
Keyword(s):  
Musca Domestica ◽  
Nutritional Quality ◽  
Critical Factor ◽  
Cost Effective ◽  
Good Growth ◽  
Commercial Fish ◽  
Protein Sources ◽  
Fish Diets ◽  
Alternative Protein ◽  
B Complex Vitamins

 The main animal protein ingredient in fish diets is most often fishmeal because of its nutritional quality. However, the limited availability and increasingly cost of fishmeal has lead to investigations of either lowering or replacing the fishmeal content with more economic protein sources of animal and/or plant origin. The research for suitable and cost-effective alternative protein sources for use in commercial fish diets will be the most critical factor in the development of intensive aquaculture. Insect meals are nutritious and healthy alternatives to fishmeal because of its rich nutritional values especially protein, fat and minerals. Housefly maggot (Musca domestica) meal is also rich in B complex vitamins, trace elements and phosphorus. From the results of previous studies, Housefly maggot meal can be successfully used to replace fishmeal portion partially or completely in the fish diets. Also, the results observed that not physiological stressful was introduced in the fish by feeding Housefly maggot meal diets. This indicates that Housefly maggots meal were well utilized by the fish thus resulting in good growth of fish. In other study, observed a best performance of fish that fed diets containing maggot meal over those solely fed on fishmeal diets. This is a reflection of the nutritional quality and acceptance of this biomaterial. 

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