|
|
- Impact of climate change on livestock production in Bangladesh - A review
Authors: Z Naim, M Asaduzzaman, M Akter, MS Islam
Pages: 1 - 14
Abstract: Livestock plays a crucial part in the global food chain; however, its production and supply could be jeopardized due to climate change-related risks. Therefore, this study gathered information regarding adverse climatic livestock production, adaptation, and mitigation strategies to the hazards' impact, finding research opportunities, and suggesting ideas for policymaking. The impact of increased temperature, altered rainfall, drought, flood, riverbank erosion, salinity, natural calamities like cyclones, etc. on livestock production was reviewed and reported in this article. They are responsible for reducing the availability and quality of fodder and water, declining livestock growth and reproduction, spreading diseases, and posing a threat to animal genetic resources. On the other hand, Bangladesh is anticipated to descend under water as a result of sea level rise resulting in a saline incursion into cropland and freshwater, drastically affecting crop and livestock production, especially in coastal regions. The impact of the hazards can be reduced through following some mitigation and adaptation strategies such as adopting and improving local breeds, practicing mixed farming systems, embracing climate smart livestock management systems, providing insurances for the losses to farmers, and so on. Feeding practices can be altered during flood by providing tree leaves, UMB, unconventional feeds. In conclusion, this review provided a compiled knowledge of climate change affecting livestock production, identifies the research gaps and suggests further research opportunities in this sector. Bangladesh Journal of Animal Science 52 (1): 1-14, March 2023
PubDate: 2023-04-02
DOI: 10.3329/bjas.v52i1.65311
Issue No: Vol. 52, No. 1 (2023)
- Storage duration impacts on nutritional composition and quality of table
eggs
Authors: AA Adeoye, OO Oyeleye, RA Olorunsola, P Akinleye, JB Ojajuni
Pages: 15 - 21
Abstract: This study was carried out to evaluate the effect of the duration of storage of ISA brown eggs at room temperature on the nutritional composition and quality of eggs. A total of one hundred and twenty (120) freshly laid eggs by 36 weeks old ISA brown layers were randomly collected and stored at room temperature for 21 days. On each sampling day (at week 0, week 1, week 2, and week 3 of storage), 30 eggs were broken to determine internal and external egg quality traits, proximate composition, and mineral profile. Collected data were subjected to statistical analysis. Duration of storage had a significant effect (p<0.05) on egg traits, proximate components, and mineral profile except for egg shape index and shell thickness. The overall egg weight, egg length, egg width, shape index, shell weight, shell ratio, and shell thickness were 56.82g, 5.69mm, 4.43mm, 78.02, 7.45g, 13.11, and 0.28mm respectively, while yolk height, albumen height, yolk weight, albumen weight, albumen ratio, yolk ratio, and Haugh unit were 13.55mm, 4.97mm, 16.32g, 33.06g, 58.11, 28.82 and 67.50% respectively. The overall means for moisture, crude protein, ash, fat, and carbohydrate were 76.27%, 12.06%, and 1.83%, 4.62%, and 4.37% respectively. Most of the minerals increased in value as the eggs increased in age. The duration of storage of eggs affected the egg quality, proximate components, and mineral profile as these parameters determine acceptability by consumers. Bangladesh Journal of Animal Science 52 (1): 15-21, March 2023
PubDate: 2023-04-02
DOI: 10.3329/bjas.v52i1.65356
Issue No: Vol. 52, No. 1 (2023)
- Detection of taste thresholds at different growth stages of broilers
Authors: B Dey, S Sarker, A Roy, RA Runa
Pages: 22 - 28
Abstract: The sense of taste has a key role in nutrient sensing and food intake in poultry. A standardized and simple method for the determination of tastant-detection thresholds is required for chemosensory research in poultry as well poultry feed formulation. The goal of the study was to evaluate the effect of aging on the behavioural taste sensitivities of broiler chickens in order to improve the efficiency of feeding through correct feed selection and ration preparation. It especially aimed to establish the threshold concentrations of five different taste components (sweet, sour, bitter, salt, and umami). Total of 15 feeding trials for broiler chicks of various ages were performed. For each taste quality, the powdered flavor active ingredients for sweet, sour, bitter, salty, and umami were selected. The actual drinking volume of water and taste solution was identified. Because the p values were less than 0.05, the concentrations of sucrose (100 mM), citric acid (50 mM), sodium chloride (20 mM), caffeine (10 mM), and mono-sodium glutamate (MSG) (100 mM) were significant. Taken together, it may be concluded that the taste active chemical sensitivity was very "concentration-dependent" manner for the aforementioned concentrations and that younger chickens have a greater sense of taste than older birds. Bangladesh Journal of Animal Science 52 (1): 22-28, March 2023
PubDate: 2023-04-02
DOI: 10.3329/bjas.v52i1.65358
Issue No: Vol. 52, No. 1 (2023)
- Impact of black cumin and green tea on fertility, immunity and offspring
morphology during reproductive aging in mice
Authors: SAM Hoque, S Ahmed, MM Islam, MD Hossain, MU Habiba
Pages: 29 - 37
Abstract: With the advancement of age in mammalian females, the reproductive ability is severely compromised, and infertility occurs. Black cumin seeds and green tea are believed to have pro-oxidant effects against various age-related disorders. Using mice model, this study was conducted to elucidate the impact of black cumin and green tea on fertility and offspring morphology of mammalian females during reproductive aging. For this, twenty aged female mice (£180 days old) were served either with or without black cumin through feed, green tea through drinking water, or their combination. The mice were regularly checked for estrus cycle and mated with males. Similar reproductive patterns were observed in all the groups up to 285 days. After that, weak estrus or anestrus was observed in the control group; however, the active reproductive period was observed to extend up to 350, 375, and 432 days in mice treated with black cumin, green tea, and their combination, respectively. Accordingly, the treatment of black cumin and green tea significantly increased the average number of pups per litter, having comparatively higher birth weight and weaning weight. Moreover, the duration of hair development and eye-opening were significantly reduced in all treated mother. The serum immunoglobulin results revealed higher immunity in mice treated with black cumin and green tea treatment either separately or in combination. Similarly, healthy ovarian follicles with a compact layer of granulosa cells and expanded cumulus cell layer surrounded by oocytes in all the treated mice compared to those of untreated mice. These findings will be helpful for developing breeding strategies during the reproductive aging of mammalian females. Bangladesh Journal of Animal Science 52 (1): 29-37, March 2023
PubDate: 2023-04-02
DOI: 10.3329/bjas.v52i1.65359
Issue No: Vol. 52, No. 1 (2023)
- Impact of industrial effluent on morphological characteristics of maize
fodder
Authors: S Islam, MO Rahman, MD Hossain, MM Rahman, MZU Kamal
Pages: 38 - 44
Abstract: Industrial effluent (IE) is a serious threat to human, plant and aquatic lives. This study was carried out to assess the impact of IE on morphological characteristics of maize fodder at different stages of growth. The pot experiment was laid out in a Completely Randomized Design using five treatments with eight replications at Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur and IE was collected from the discharge points of the nearest garments located at BSMRAU. The treatments were T1, 100% FW (fresh water); T2, 75% FW + 25% IE; T3, 50% FW + 50% IE; T4, 25% FW + 75% IE; T5, 100% IE. The results indicated that IE decreased plant height and plant dry weight for all stages. Leaves number was reduced at the maturity stage in the IE treatments. No influence was observed on leaf length by IE. Higher concentrations of IE also influenced smaller leaf width at the vegetative stage. Root length was reduced for the application of IE at the maturity and vegetative stage. Root dry weight was higher for T1 and T3 at the flowering stage and T3 at the maturity stage. Hence, it may be concluded that IE had negative effect on the morphological characteristics of maize fodder. Bangladesh Journal of Animal Science 52 (1): 38-44, March 2023
PubDate: 2023-04-02
DOI: 10.3329/bjas.v52i1.65362
Issue No: Vol. 52, No. 1 (2023)
|
Open Access journal
