scholarly journals Regulation of the Duration of Spawning Cycles of Catfish in Industrial Aquaculture

2021 ◽  
Author(s):  
Elena Romanova ◽  
Vaselina Lyubomirova ◽  
Vasily Romanov ◽  
Ludmila Shadyeva ◽  
Tatiana Shlenkina
Keyword(s):  
Pituitary Gland ◽  
Sex Hormones ◽  
Clarias Gariepinus ◽  
African Catfish ◽  
Spawning Period ◽  
Vitro Fertilization ◽  
Optimal Duration ◽  
Fundamental Research

This article is devoted to the study of the qualitative and quantitative characteristics of the African Catfish Clarias gariepinus eggs produced at different durations of the inter-spawning interval. Eggs were produced artificially using sex hormones. In industrial aquaculture, the African Catfish Clarias gariepinus does not reproduce naturally. Therefore, the problem of obtaining high-quality eggs that will be used for in-vitro fertilization is urgent. To implement artificial spawning of fish in industrial aquaculture, it is necessary to correctly choose the effective hormonal stimulator and empirically select its dose. Sex hormones are involved in regulating the duration of the inter-spawning interval and affect the quality of eggs produced both for fertilization and for food purposes. The pituitary gland of the African Catfish Clarias gariepinus and surfagon were used as gametogenesis stimulators. The aim of the work was to study the optimal duration of the inter-spawning interval and the effect of hormonal inducers used to stimulate artificial spawning in industrial aquaculture. The use of the catfish pituitary gland in fresh or acetonated form as a hormonal stimulator provided higher-quality eggs, compared to the synthetic hormonal drug - surfagon. Stimulation with acetonated pituitary injections reduced the inter-spawning interval of the African Catfish Clarias gariepinus to three months, and the use of surfagon prolonged the inter-spawning interval to four months. Reducing the duration of the inter-spawning interval is important for the production of the African Catfish Clarias gariepinus eggs for food purposes. Studies have shown that reducing the optimal duration of the inter-spawning interval negatively affects the quality of the produced eggs and their quantity. This research was financially supported by a grant from the Russian Foundation for Fundamental Research, project No. 18-016-00127. Keywords: aquaculture, African Catfish Clarias gariepinus, eggs, inter-spawning period, sex hormones, oocytes

Sexual Function and Fertility Quality of Life in Women Using In Vitro Fertilization

2015 ◽  
Vol 12 (4) ◽  
pp. 985-993 ◽  
Author(s):  
Nicole K. Smith ◽  
Jody Madeira ◽  
Heather R. Millard
Keyword(s):  
Quality Of Life ◽  
In Vitro Fertilization ◽  
Sexual Function ◽  
Vitro Fertilization

scholarly journals Water Quality and Haematological Indices of Clarias gariepinus from Ogun River (Nigeria)

2015 ◽  
Vol 17 (2) ◽  
pp. 105-112
Author(s):  
Olaniyi Alaba Olopade ◽  
Iyabode Olusola Taiwo ◽  
Comfort Opeoluwa Oluwoleand ◽  
Justin Ayaegbunem Akankali
Keyword(s):  
Water Quality ◽  
Physicochemical Parameters ◽  
Clarias Gariepinus ◽  
Haematological Parameters ◽  
African Catfish ◽  
Effect Of Water ◽  
Almost All ◽  
Haematological Indices ◽  
Ogun River

Abstract This study was conducted to assess the effect of water quality of the Ogun River on the haematological indices of the African catfish Clarias gariepinus. Samples of water and Clarias gariepinus were collected from Ogun River (Station I, Opeji and Station II, Lafenwa) to determine and compare effects of possible differences in water quality on haematological parameters of Clarias gariepinus. The results demonstrate that higher index values were recorded at station II than Station I for almost all the physicochemical parameters and only sulphate values from Stations I and II were statistically significant (P < 0.05).

scholarly journals Comparative study on African catfish (Burchell, 1822) hypophysation using ovaprim and chicken pituitary gland extract

2021 ◽  
Vol 3 (1) ◽  
pp. 1-6
Author(s):  
O. A. Babalola ◽  
◽  
F. A. Fakunmoju ◽  
T. F. Sunnuvu ◽  
B. E. Faleti ◽  
...  
Keyword(s):  
Water Quality ◽  
Comparative Study ◽  
Pituitary Gland ◽  
Clarias Gariepinus ◽  
Latency Period ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
African Catfish ◽  
Gland Extract ◽  
Significant Difference

Comparative study on African catfish hypophysation indices using ovaprim and chicken pituitary gland extract (CPGE) was carried out. Sixteen (16) African catfish brood stocks between 1100 and 2300 g in ratio 2:1 and four (4) numbers of layer birds (Gallus gallus domesticus) between 1200 and 2200 g in ratio 1:3 were used respectively. The experiment was batched into “A” and “B”. Batch ‘A’ was placed on ovaprim while batch ‘B’ was placed on CPGE. An indoor hatchery vat, measuring 0.6096 m x 1.8288 m x 0.3048 m each was used for the incubation. Digital measuring kits were used to monitor water quality parameters and measurement of the brood stocks weights independently. Brood stocks on ovaprim and CPGE treatments had the following mean hypophysation indices in these order: fecundity (11100±7690 and 17760±13863), latency period (9.53±0.54 and 9.77±0.49), fertilization percentage (94.03±5.90% and 90.6±10.11%), hatchability percentage (75.6±0.81% and79.35±10.27%), number of eggs produced (5889±657.37 and 9403.33±589.80), total number of larvae hatched (4717.33±1111.0 and 7111.33±506.64), SGR (0.67±0.31 and 1.1±0.31), and survival rate (64.81±0.71 and66.24±2.19) respectively. There was no significant difference (p = 0.05) in the mean values of fecundity, latency period, fertilization and hatchability percentages in both treatments but there was significant difference (p ≤ 0.05) in number of eggs produced and total number of larvae hatched in both treatments. The water quality parameters were within the range for induced breeding techniques and there was no significant difference (p= 0.05) in both experiments. Both ovaprim and CPGE had excellent results from the induced breeding of Clarias gariepinus and yielded good results. Therefore, CPGE could be recommended from the view point of excellent results and its availability from chicken slaughter houses as against ovaprim which are imported.

IN VITRO EFFECT OF PHARMACEUTICAL EFFLUENT ON HAEMATOLOGY AND BIOCHEMICAL RESPONSES IN AFRICAN CATFISH (CLARIAS GARIEPINUS)

2021 ◽  
Vol 4 (4) ◽  
pp. 391-400
Author(s):  
Shafiu Nafiu Abdullahi ◽  
M. Zakariyya ◽  
Z. Y. Hassan ◽  
M. K. Ahmad
Keyword(s):  
Heavy Metals ◽  
Negative Impact ◽  
Clarias Gariepinus ◽  
African Catfish ◽  
Corpuscular Haemoglobin ◽  
Biochemical Alterations ◽  
Experimental Fish ◽  
Mean Corpuscular Haemoglobin ◽  
Vitro Effect

Pharmaceutical effluents collected from Bompai industrial area, Kano State were assessed for their physiochemical parameters, heavy metals and effect on haematology and biochemical changes in Clarias gariepinus. Laboratory analyses were performed using standard methods in a Completely Randomized Design (CRD). Five test solutions of the effluents (0, 25, 50, 75, and 100% v/v) were prepared for LC50 96hr acute toxicity test. The LC50 for 96hr was 48.7% concentration of effluents by volume. Experimental fish were exposed to sublethal concentrations of 0.00% 2.43% (5/100 LC50), 12.17% (25/100 LC50), 24.35% (50/100 LC50) and 36.52% (75/100 LC50) for 28days.  Physicochemical parameters recorded were higher than WHO recommended Standard with the exception of water temperature. Heavy metals concentrations decreased in the order of Cr > Cu > Pd > Cd. Red blood Cells count, haemoglobin concentrations, packed cell volume, lymphocytes and monocytes of the experimental fish decline significantly (p<0.05) when exposed with 2.43, 12.17, 24.35, 36.52% effluents  compared to the control. White blood cell count, mean corpuscular haemoglobin, mean corpuscular volume, mean corpuscular haemoglobin concentrations, neutrophils and eosinophils were significantly higher (P<0.05) than the control. However, a significant increase (P<0.05) in the activities of serum aspartate aminotransferase (AST), Alkaline Phosphatase (ALP) and alanine aminotransferase (ALT) were recorded as the exposure period continued when compared with control. It is concluded that the effluents induces haematological and biochemical alterations. It is therefore recommended that regulatory bodies should adopt holistic approach on the aquatic pollution abatement, bearing in mind the negative impact to non-target organisms.

scholarly journals DOES A WEB-BASED APP IMPACT QUALITY OF LIFE MEASURES DURING IN VITRO FERTILIZATION?

2020 ◽  
Vol 114 (3) ◽  
pp. e62-e63
Author(s):  
Caitlin Elizabeth Martin ◽  
Michael Lanham ◽  
Courtney A. Marsh ◽  
Kenan Omurtag
Keyword(s):  
Quality Of Life ◽  
In Vitro Fertilization ◽  
Web Based ◽  
Vitro Fertilization ◽  
Quality Of Life Measures
Sign in / Sign up

Export Citation Format

Share Document