The ornamental fish trade is a nascent fisheries-oriented trade sector in Bangladesh. The country’s ornamental fish trade’s centrum is the Katabon Market in Dhaka, Bangladesh’s capital. This study portrays the overview of the ornamental fish trade, the constraints associated, and the likelihoods of this trade in Katabon. The study discovered 33 aquarium shops, and the average business experience of traders was around ten years. A total of 41 varieties of fish had been identified as available for selling, and most of them (53.66%) belong to the fish order Perciformes. Osteoglossum bicirrhosum (Silver arowana; 68000±27838.82 BDT/Pair) was tracked down as the most expensive fish, followed by Cyprinus carpio (assorted koi carp; 8200±2939.19 BDT/Pair). A general marketing channel was identified, initiated with the importers and local hatchery owners, and ended up with the end-users, aquarium keepers. The most sold species was Carassius auratus. The research analysis had identified a lack of suitable policy for the expansion of the trade, adequate knowledge on diagnosis and treatment of diseased fish, research on feeding and breeding technology, integration with other trade, skilled staffing’s involvement, and accurate quarantine procedure as the key constraints impeding the accrual of the trade.

Keywords: Aquarium, Ornamental fish, Aquatic trade

The study investigated biodiversity, and the present status of the Teesta River fishery in Rangpur and Nilphamari district, Bangladesh, from November 2018 through October 2019. Questionnaire Interviews and Focus Group Discussions with Key Informant Interviews (KII) and a catch assessment survey were carried out in the study. A total of 45 fish species were identified under 17 families and ten olders. Fishes were categorized as commonly available (24.44%), moderately available (26.66%), less available (22.22%), and rarely available (26.66%). A total of 8 fishing gear were identified. The highest and lowest level of gear efficiency was recorded from Gill net and Dhoar (Fish trap) in May and June as 0.501 kg and 0.000209 kg, respectively. In October, all gear’s maximum average gear efficiency (1.039 kg) was recorded, and the minimum average gear efficiency (0.309 kg) was recorded in June. Shannon-Weaver diversity index (H’) was found to range from 1.11 to 2.42. Highest Margalef Species Richness (d) (3.24) was in April and the lowest (1.86) was in September. The highest Pielou’s Evenness Index (J’) (0.78) was documented in January, and the lowest (0.36) in August. The highest fish production was in April (592±65.30 kg/day), and the lowest in July (112±12.24 kg/day). Significant threats to fish biodiversity, habitat, and overall fish production of the Teesta River were identified. However, the establishment of the sanctuary, control of pollution, maintenance of fishing gear, and the implementation of the fish act is necessary for the conservation of fish biodiversity of this River.

Keywords: Fish biodiversity, abundance, CPUE, threats, Teesta River

The experiment was conducted to screen some maize varieties available in Bangladesh on the basis of their reproductive characteristics. Mean data were used to statistical analyze like analysis of variance, mean, range were calculated by using MSTATC software program. Significant variations among 50 maize genotypes in terms of all the yield contributing characters were found in this study. The lowest (24) days to 50% tasselling was found from the genotype 25KSS and VA-786, while the minimum (54) days to 50% silking was observed in the genotype PAC-984. The longest (21cm) cob was observed in the genotype VA-786, and the highest (17.07cm) cob diameter was recorded in the genotype GP-838.The highest (16.61) row per cob was recorded in the genotype NZ-001, and the highest (40.40) number of grains per row was recorded in the genotype PAC-399. The highest100grain weight (383.33g), was recorded in the genotype 25KSS, while the lowest (153.3g) was observed in the genotype of Uttaran-2. Statistically, significant variation was recorded for days to maturity in different maize genotypes. The highest (116) days to maturity were found in the genotype Elite, while the lowest days to maturity (107.3) were found in the genotype BHM-3. Grain yield (t ha^-1) varied significantly in maize genotypes under the study. The average grain yield was recorded at around 6.14(t ha^-1), and it ranged from 2.30 to 8.17. The highest grain yield (8.17 t ha^-1) was recorded in genotype BHM-9, which was followed by PAC-984 (7.90t ha^-1) and Pacific-98 (7.90t ha^-1). Therefore, this experiment suggests that these three hybrids– namely,   BHM-9, PAC-984, and Pacific-98 have a high potential to produce more yield and are suitable for commercial cultivation in Bangladesh.

Keywords: Maize, Varieties, Screening, Variation

Land suitability assessment is important to identify environmental limitations that affect growth, development, and chilli production. A study on land suitability assessment of chilli for the Sylhet district of Bangladesh was performed to measure suitable lands for its higher productivity. The maps for the Normalized Difference Vegetation Index (NDVI) and Soil Adjusted Vegetation Index (SAVI) were generated from Landsat-8 satellite images. Other vector layers for soil and climate were transformed into raster datasets. Finally, ArcGIS software used a weighted overlay spatial analysis to identify and measure lands under different suitability classes. The study results showed that the lands for highly suitable, moderately suitable, marginally suitable, and not suitable categories were 15,187; 93,909; 207,908; and 3,396 hectares which accounted for 4.74, 29.31, 64.89, and 1.06 percent, respectively. The developed land suitability assessment model for chilli would be a valuable tool for scientists, agricultural extension workers, and land policymakers to take further initiatives to increase the production and sustainable management of agricultural lands in the study area.

Keywords: Land suitability, Chilli, GIS and remote sensing data

An experiment was conducted from November 2018 through April 2019 at Noagaon village of South Sunamganj Upazila in Sunamganj District to observe the effects of fertilizers on the growth and yield of boro rice varieties. Two factors experiment was conducted using three rice varieties viz. V₁=BRRI dhan28, V₂=BRRI dhan29 and V₃=BRRI dhan58; and two fertilizers levels viz. F₁= N₁₃₈P_22.4K_63.5S_13.5Zn_1.3kg ha^-1 (FRG-2012) and F₂=N₅₇P₁₂K₁₂kg ha^-1 (Farmers’ practice) where Randomized Complete Block Design (RCBD) was followed and replicated thrice. Growth and yield data were recorded. Results of the experiment showed that growth performance was higher in V₁ followed by V₂. The highest spikelets panicle^-1 (253.23) and grains panicle^-1 (162.57) were recorded from V₂. F₁ also gave a higher performance in no. of spikelets panicle^-1 (189.81) and grains panicle^-1 (132.74) over F₂.  The highest 1000 grains weight (22.55 g) was observed in V₂ and higher (22.28 g) found in F₁. The highest grain yield of 7.66 t ha^-1 was produced in V_2, and the lowest yield (6.08 t ha^-1) was produced in V. The higher yield of 7.18 t ha^-1obtained from F₁ over F₂(6.23 t ha^-1). V₂ produced the 14 % higher grain yield (8.17 t ha^-1) with the application of F₁ over F₂. The highest BCR (1.54) was found when V₂ was treated with F_1, and the lowest BCR (1.19) was observed inV₁with F₂. In comparison to initial soil nutrients status as well as the organic matter was increased in post-harvest soil when applied balanced fertilizers.

Keywords: Variety, Haor, Balanced fertilizer, BCR, Nutrient status