Research on the Diets Determination for Initial Feeding of Anguilla mormorata Glass Eel

[ Objective] To find a suital;）le food for initial feeding of Anguilla mormorata glass eels. [ Method] A pre -weaning feeding experiment was conducted indoor in fiberglass tanks, three different diets, Tubifex, minced octopus flesh and 1：1 mixture （ by weight ） of Tubffex and minced octo- pus flesh were introduced, r Result] All three kinds of diets were acceptable to A. morrnorata glass eels, and of three diets, the minced octopus flesh could serve as the best food for initial feeding of A. mormorata glass eels, which contributed 93% survival at the termination of the 21 - day＇s exped- ment and provided with relatively fast growth and homogeneous size variation. [ Conclusion] The minced octopus flesh can serve as a suitable food to replace Tubifex for the initial feeding of anguilla glass eels.

Vertically-Suspended Environmental Enrichment Improves Growth of Landlocked Fall Chinook Salmon during Initial Hatchery Rearing

Environmental enrichment has been shown to improve juvenile salmonid growth during hatchery rearing. This study examined the effects of vertically-suspended environmental enrichment starting seven days after feed training and continuing for the next 32 days of landlocked fall Chinook salmon (Oncorhynchus tshawytscha) rearing. At the end of this experiment, final tank weights, gain, percent gain, and feed conversion ratio were all significantly improved in the tanks of salmon with environmental enrichment compared to barren tanks, with a nearly 25% improvement in feed conversion ratio. Individual salmon in tanks with environmental enrichment were significantly longer and weighed significantly more than salmon from tanks without enrichment. Specific growth rate was also significantly improved with the use of enrichment. The use of vertically-suspended environmental enrichment to improve growth and rearing efficiency is recommended during the initial rearing of landlocked fall Chinook salmon.

First Hour Initiation of Breast Feeding &Associated Factors, among Mothers at Post Natal Ward in Fort Portal Referral Hospital, Uganda

Background: Breast milk is recommended as the best feeding option to neonates and infants for it confers immunological benefits that help to reduce neonatal and infant morbidities and mortalities. WHO recommends that all infants should start breast feeding within one hour of birth i.e. early initiation of breast feeding (EIBF). Unfortunately, studies show that less than 40% of infants in resource limited settings Uganda inclusive are initiated on breast feeding practice, with no documented study done in Kabarole district to assess the problem. This study therefore, set out to establish the prevalence and associated factors with the practice of first hour initiation of breast feeding at Fort Portal Regional Hospital, Kabarole district, Uganda. Methods: With a cross-sectional design, we collected data from 330 post natal mothers and their live-born infants at Fort Portal Regional Referral hospital from 5th-20th August 2019. With a standard interviewer administered tool, mothers who initiated breast feeding within the first hour after delivery of their newly born babies responded with yes and those that did not with a no. Prevalence of one hour initiation was got considering infants that were initiated on breast within one hour over the total live birth times 100 to get the percent prevalence. With Stata version 13 software, statistically significant relationships of the predisposing factors were determined at a p-value (p ≤ 0.05) at bivariate and at multivariate regression coefficient. Results: A total of 330 postnatal mothers targeted for this study, 100% response rate was covered. Mothers’ age ranged from 18 - 45 years with mean age 31 SD ± 6. The prevalence of initiation of breast feeding in the first hour of birth was 68%, a third of (32%) mothers had not initiated breast feeding in the first hour. A half (50%) of the direct predisposing factors for non-initiation of timely breastfeeding were due to birth asphyxia, almost a quarter 23% due to mother’s ill health and 7% due mother not being guided by the health worker on what to do. In this study mothers’ knowledge and awareness of the practice were very low at 20% while that of health workers was fair at 53%. Social demographic factors that influence 1st hour breast feeding practice were;young maternal age being less than 34 years, mothers occupation being self-employed (83%) or unemployed (73%) with 3 times higher odds of initiating breastfeeding within 1st (OR = 3, p = 0.003) than working class mothers (civil servants). Marital status of mothers being married (73%) significantly influenced early breastfeeding practice (p = 0.001). Health workers’ knowledge of the practice was significantly associated (OR = 2.7, X2 = 11.32, *p = 0.00078) with enforcement of mother initiation of breast feeding in first hour compared to the less knowledgeable ones. Conclusion: The practice of timely initiation of breastfeeding at Fort Portal Regional Referral hospital at 68.2% was sub-optimal against WHO universal practice recommendations. Mothers’ low knowledge on timely initiation of breast feeding practice was the most deterrent factor for first hour initiation of breastfeeding practice. Providing breastfeeding counselling to all mothers during ANC and training on best breastfeeding practices and counselling skills for health staff at Fort Portal Referral hospital are urgent recommendation in this study to improve the practice.

Study on Growth and Development of Early Postembryonic Stage of Onychostoma sima

[Objective] The paper was to study the growth and development of Onychostoma sima in postembryonic development stage. [Method] The oosperm was obtained by artificial spawning and artificial insemination method, and hatched under laboratory condition. The indexes such as body weight, body length, length in front of anus and body height were measured to establish larvae growth model. [Result] When the water temperature was （20±1.5） ℃, the body length and body weight of newly hatched larvae were （10.28±0.05） mm and （7.79±0.08） mg, respectively. O. sima larvae begin to feed on the 4 th day after hatching, the initial feeding rate was 48%, the highest feeding rate was 100% on the 6 th d. The-point-of-no-return （PNR） was 13.5 d. In addition, it was also observed that the appearance time of PNR point of O. sima larvae was close to death time of completely starved group, being only 2 d, indicating that once O. sima larvae reached the PNR point, they would face death threats within short time. Therefore, various growth conditions for O. sima larvae should be satisfied to ensure full development of all organs, thereby reducing death and growth stagnation caused by adverse environment in early postembryonic stage. [Conclusion] The study provided theoretical basis for solving the problems in artificial breeding.

Early development and the point of no return in pikeperch( Sander lucioperca L.) larvae

The objectives of the present study were to evaluate the yolk-sac and oil globule absorption and point of no return （PNR） ofpikeperch （Sander lucioperca L.） larvae. Artificial propagation ofpikeperch was performed at （15±2）℃. Yolk-sac absorption, oil globule absorption, larval growth and the first initial feeding rate were observed to analyze the early growth and to determine the PNR of pikeperch larvae. The total length of newly hatched （0 day after hatching, DAH） pikeperch larvae was （4.25±0.22） mm and the volume of the yolk-sac and the oil globule was （0.30±0.12）mm^3 and （5.14±2.28） 10-2 mm^3 respectively. The yolk-sac and the oil globule were exhausted at 11 DAH and 14 DAH, respectively. Pikeperch larvae began feeding at 8 DAH with an initial feeding rate about 10.0%. From 9 to 14 DAH, the initial feeding rate increased rapidly, and reached its highest （about 82.7%） at 14 DAH. It declined thereafter, 48.9% at 15 DAH and 35.6% at 16 DAH, thus the pikeperch larvae reached PNR by 15-16 DAH. The appropriate first feeding time for the pikeperch larvae is 11-12 DAH, when the initial feeding rate is higher than half of the maximum initial feeding rate.