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This survey has been conducted to study the ornamental fishes of coastal Bay of Bengal, selecting the region from Digha to Talpati, a stretch of 64 Km coastal area. Twenty ornamental fish species were identified in the coastal water bodies in this stretch. Some of them are already established as aquarium fishes and rest demand ornamental piscine status for their unique features and qualities. Some of the ornamental fish species of this area like Brachygobious sua, Gobipterus chuno, Badis badis and Brachydanio rario are endangered due to excessive degradation of local ecosystems. Special care should be taken so that they continue to exist. There are ample justifications to establish ornamental fish industry to support the unemployed youth of the area and protect the piscine biodiversity.

A preliminary study was conducted on the efficacy of Oryzias melastigma in consuming mosquito larva so as to control mosquito and mosquito borne diseases, and enhancing its reproductive success using supplementary feed. Oryzias melastigma is a larvivore fish and widely distributed in the shallow water, wetlands of Gangetic plains and peninsular India. These studies indicate that O. melastigma is a prolific breeder and gregarious feeder of mosquito larvae. Increased reproduction by providing different supplementary feed, of which Ulothrix acted remarkably, may aid in wide spread use of this fish as a biological control measure against mosquitoes. One adult fish of any sex can consume 87.1% first instars mosquito larvae/day. So, early stages of mosquito larvae are effectively controlled, as compared to other successive stages. Ulothrix has considerable effect on egg production, successful hatching and regaining reproductive maturity of female in surprisingly quicker interval.

PurposeThis study examines the effects of corporate governance mechanisms on voluntary corporate carbon disclosure in Bangladeshi firms.Design/methodology/approachTo investigate the association between corporate governance mechanisms and corporate carbon disclosures, this study employs ordinary least square (OLS) methods. To mitigate the potential endogeneity concerns, the authors also introduce firm fixed effect (FE) and random effect (RE). Primarily, the study sample includes 250 firm-year observations over the period 2015–2019 for listed companies on the Dhaka Stock Exchange (DSE) in Bangladesh. Subsequently, corporate governance mechanisms that influence voluntary carbon disclosure were examined using both univariate and OLS models.FindingsThe findings of this study suggest that firms with a larger board size and more independent directors have a positive impact on the firm's intensity to disclose carbon-related information. However, no evidence has been found of the existence of an environmental committee, and the presence of female directors on the board tends to be associated with a higher level of voluntary corporate carbon disclosure.Originality/valueThe study offers necessary evidence of the determinants of corporate carbon disclosures, which will be useful for managers, senior executives, policymakers and regulatory bodies. To improve corporate governance practices and formulate separate sets of regulations and reporting criteria, disclosing extensive and holistic carbon-related information obligatory. Further, the outcomes of this study based on Bangladeshi firms can be comprehensive for other developing countries to take precautions to tackle the effect of global climate change.