Journal of Fisheries (University of Rajshahi)
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Investigation on the effects of Inula viscosa L. on rainbow trout gonad cells induced by lipopolysaccharide
Get PDFFish cells have been accepted as an alternative to in vivo assay for inflammatory effects of therapeutic experimental systems. To reveal the anti-inflammatory effects of Inula viscosa (IV) fish cell line RTG-2, derived from the gonadal tissue of rainbow trout, was infected with lipopolysaccharide (LPS). Effective concentrations for different concentrations of LPS (1, 5, 10, 20 µM) and IN (1, 5, 10, 20 µg ml–1) were determined. While the 20 µM concentration of LPS, which was effectively selected from preliminary tests, caused 27% cell loss, the effective 1 µg ml–1 concentration of IN caused 1.1% proliferation in the cells when compared to the control group. All pro-inflammatory parameters investigated in LPS-induced RTG-2 cells showed up-regulation, with the highest increase in TNF-α gene expression level (11.3 fold changes). Down-regulation was determined in the IN together with LPS administered group and IL-1β had the highest effect with 96%. IL-6 protein level decreased by LPS at a rate of 4% and IN together with LPS increased by 9%. The IN exhibited significant efficacy against inflammation caused by LPS. However, further studies are needed to determine pharmacological activity of I. viscosa in details
Ichthyofaunal diversity and fishery status of Sutrapada Coast, Gujarat, India
Get PDFGujarat being a state having largest coastline and highest continental shelf in India represents diverse coastal habitats. Gujarat has vast potential of marine bioresources and offer considerable scope for marine fisheries. The ichthyofaunal diversity of Sutrapada, Gir Somnath district, Gujarat was investigated for a period of three years from June 2015 to June 2018 through the analysis of fish catch data of trawl fisheries and achieves of Fisheries Department, Central Institute of Fisheries Technology - Central Marine Fisheries Research Institute (CIFT-CMFRI), Marine Products Export Development Authority (MPEDA) and Commissioner Fisheries Office, Veraval. During this study period, 114 fish species belonging to 55 families and 93 genera were identified. The paper emphasizes the importance of further research on respective families for understanding of its distribution, ecology and conservation status
A comparative review on freshwater fish fauna between West Bengal and Odisha, two middle-east Indian states
Get PDFThe objective of the present study is the comparative revision of inland freshwater fish faunal diversity between West Bengal and Odisha, two states of middle-east India. Work is mainly based on the available published literature on the freshwater fish faunal diversity, checklist for fish, monograph of the area under study. Result reveals the existence of 345 species of fish belonging to 50 families under 14 orders. Analysis of data shows a slight similarity of freshwater fish faunal diversity between two states is quite expected because both the states differ in their physiography and ecology. The present report may serve as a helpful document for freshwater aquaculturists as well as fishery researchers for their future planning of research work on the subject of the study area
Length–weight relationship and condition factor of ten cyprinid fish species from the Caspian Sea, Urmia Lake and Persian Gulf basins of Iran
Get PDFIn this study, the length-weight relationships (LWRs) and condition factor (K) were estimated for 1334 specimens belonging to ten species including Acanthobrama marmid, A. microlepis, A. urmianus, Romanogobio persus, Leuciscus aspius, Luciobarbus capito, L. mursa, L. caspius, Alburnus atropatenae and Petroleuciscus ulanus from the Caspian Sea, Urmia Lake and Persian Gulf basins of Iran. The total length and weight of the individuals varied from 3.4 to 84.5 cm and 0.4 to 6600 g respectively. The values of the slope parameter (b) and condition factor ranged from 2.99 – 3.38 and 0.79 – 1.25 respectively. LWRs with high correlation coefficients were calculated for all species (R2 > 0.95). Based on the results, the allometric growth pattern of the studied species were positive except for L. aspius, L. capito, L. mursa and P. ulanus. This study provides useful data regarding the LWRs and condition factor of ten fish species in Iranian inland waters that can be used in fisheries management, stock assessment and future studies
Quality changes in sea grape, Caulerpa lentillifera at different brine concentrations
Get PDFSea grapes are among the seaweeds being commercialized in the Philippines. They are sold in fresh state, and are highly perishable. It is necessary to develop preservation techniques in order to lengthen its shelf life. This study aims to assess the physico-chemical, microbial and sensorial quality of sea grape Caulerpa lentillifera preserved in 0%, 5%, 10% and 15% brine concentrations. Results revealed that brining effectively extended the shelf life of C. lentillifera by inhibiting the growth of bacteria and maintaining the osmotic pressure between the product and the solution. Within the 10 days storage period, 10% and 15% were bacteriologically stable and more acceptable upon rehydration. Treatments 0% and 5% were not acceptable because it exceeded the bacterial limit set for fresh vegetables. The sensorial attributes were compromised and became less acceptable due to degradation through bacterial action. In terms of physico-chemical analysis, high salt concentration (15%) decreased chlorophyll and carotenoid content significantly due to shrinkage and water loss. Overall, this study proved that sea grapes in 10% brine solution can extend its shelf life
New record of white-spotted pufferfish Arothron hispidus (Linnaeus, 1758) (Tetraodontiformes: Tetraodontidae) from West Bengal, India, compared with other Arothron species occurring in India
Get PDFTwo specimens of Arothron hispidus (Linnaeus, 1758) (111.7 – 112.8 mm in standard length), was collected in May 2019 from the Frasergunj fishing harbour in West Bengal, eastern India. Herein, we report this species for the first time from West Bengal. We have described the diagnostic features of the collected specimens and compared them with other Arothron species found in Indian waters
Socio-economic status of fishermen community of Wular Lake in district Bandipora of Jammu and Kashmir
Get PDFThe present study investigates the socio-economic status of fishermen community of Wular Lake in district Bandipora of Jammu and Kashmir. Data were collected through structured interview schedule from 150 respondents from fishermen community between July and September 2020. It was found that 34.7% of the respondents fall in to the age group of 41–50 years and 56.0% were married. Majority of the respondents were illiterate (61.3%) and over half of the respondents (59.3%) earned monthly Rs.1000–5000. The study also explored that 93.3% of the respondents lived in their owned houses. The family size of fishing community was usually consisted of 7–10 members and 51.3% of them lived in a joint family system. However, most of them (54.66%) were dependent on river/canal water as drinking source and 59.3% were having dry latrine. It may be concluded that the fishermen community in the study area was the disadvantaged group of the society. Government, NGOs and respective stakeholders should come forward to take proper and necessary steps to improve their living conditions
Population structure and shell dimension of the invasive veined whelk (Rapana venosa)
Get PDFThe veined whelk (Rapana venosa) is a widely known invasive species in the Black Sea. This species exerts negative impacts on the Black Sea ecosystem including destruction of bivalve, mussel and oyster populations. This study aimed to examine population structure using the length-frequency distribution and shell dimensions of R. venosa, collected from the Black Sea. A total of 506 specimens were collected from the Trabzon Coast and classified into 6 age groups using the Bhattacharya method. The Von-Bertalanffy growth parameters were calculated as L∞ = 10.29 cm, k = 0.09, t0 = 1.25 yr–1. The mortality and exploitation rates were estimated as total mortality Z = 0.51 yr–1, fishing mortality F = 0.31 yr–1, annual mortality M = 0.20 yr–1 and exploitation rate E = 0.60 yr–1. This study will help understanding the growth of R. venosa and its management
Two new records of bivalve (Mollusca) from Sonadia Island, Bangladesh
Get PDFThe Sonadia Island, located at the south-east coast of Bangladesh, comprises a wide variety of wetland habitats including mudflats, sand dunes and mangroves which made this island a favoured habitat for diversified molluscan fauna. This paper deals with the new distributional record of two species of marine Bivalvia in Bangladesh- Tellinides timorensis Lamarck, 1818 and Vepricardium coronatum (Schröter, 1786) belonging to the family Tellinidae and Cardiidae respectively. Analysis of taxonomy, diagnosis of shell, geographic distribution and habitat, illustrations of each species and identification characteristics were presented in this paper
Effects of feeding frequency on the growth and production performance of indigenous catfish Clarias batrachus (Linnaeus, 1758) in ponds of Northern Bangladesh
Get PDFEffects of feeding frequency on the growth performance and production of Clarias batrachus was evaluated for a period of 180 days. Feeding frequency were once (T1), twice (T2) and thrice (T3) per day. Stocking density was 16750 fingerlings ha–1. The fish were initially fed 28% protein containing formulated feed at the rate of 8% of body weight which subsequently reduced to 5% at the end. The water quality parameters were monitored fortnightly and found similar across treatments and remained within the suitable ranges for aquaculture. The mean weight gain was 41.14±0.15, 44.49±0.78 and 56.10±0.86 g and specific growth rate (SGR) of 1.29±0.002, 1.33±0.01 and 1.44±0.01% per day in T1, T2 and T3 respectively. The highest survival rate was in T2 (96.23±0.76%) whereas the lowest was in T1 (95.32±0.76%). The lowest FCR (=best; 1.65±0.12) was found in T3 and the highest FCR (=worst; 2.14±0.15) was recorded in T1. The highest production was observed in T3 (3559.27±85.95 kg ha–1), which was significantly higher than that of other treatments. This study concludes that feeding three times per day is effective for C. batrachus