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Research Detail

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Mohammad Arshad-Ul-Alam
Department of Zoology, University of Chittagong, Chittagong 4331, Bangladesh

Mohammad Ali Azadi
maazadi@yahoo.com
Department of Zoology, Bandarban Government College, National University, Bandarban Hill District 4600, Bangladesh

To determine the catch efficiency of fishing gears, catch per unit effort (CPUE) data were collected for two years during January 2007 to December 2008 from the river Halda. Analyses were done to examine the variation of CPUE among gears, studied sections, months and years. The mean CPUE for pooled data of all gears was 2.247±0.265 kg gear-1day-1 and 2.697±0.355 kg gear-1day-1 for 2007 and 2008 respectively. Among eight gear categories, bag nets yielded the highest CPUE during 2007 (5.957±0.704 kg gear-1day-1) and seine nets during 2008 (7.288±1.477 kg gear-1day-1). Among 31 gear types, small meshed bag nets yielded the highest CPUE (18.065±6.660 and 15.69±4.479 kg gear-1 day-1 during 2007 and 2008 respectively). CPUE was highest during March-April and September-November periods. Analysis of variance showed significant difference among catch rates of different fishing gears. The CPUE differed significantly among different months for net fence, gill net, cast net and scoop net during 2007; and for seine net, net fence, bag net and cast net during 2008.

  Halda River, Catch efficiency, Catch per unit effort, CPUE, Catch rate
  Khagrachari Hill District, Bangladesh.
  00-01-2007
  00-12-2008
  Socio-economic and Policy
  Fish

To find out the catch rates in terms of daily catch per unit of fishing effort (CPUE) of different fishing gears in the river Halda.

Tidal river Halda is one of the major tributaries of the river Karnaphuli. Originated from Khagrachari Hill District of Bangladesh, it meets with the river Karnaphuli at 15 km north of Chittagong Metropolitan City. The river Halda is 88 km in length and 35 m in width at upstream to 210 m at the confluence of the river. The present study area covered the entire fishing zone of 39 km area of the river Halda starting from the Nazirhat Bridge (upstream) to the river mouth (lower Halda-downstream) joined with the river Karnaphuli, which covered an area of 351 ha. Study area was divided into three sections, i.e. (1) non-spawning area of carps (upstream), (2) spawning area (mid stream), and (3) non spawning and one spawning area (downstream-up to river mouth endpoint) to examine any variations among the sections. Catch sample for every fishing gear was recorded for catch monitoring and assessment. Some catch samples were taken during the fishing effort survey and others during catch assessment survey followed by fishing effort survey. Samples were collected wholly for small catch and a number of sub-samples for big catch directly from fishermen during fishing or at the end of fishing. A minimum of one catch sample was taken for each fishing gear for each section in every month. A total of 1019 catch samples of the different types of fishing gears were recorded and analysed. Data were analysed using the Microsoft Excel. The existing 34 types  of fishing gears of the river Halda were rearranged into 31 types and grouped into eight gear categories and four user categories for analysis and -1 presentation of data. ANOVA was done manually on MS Excel sheet using different MS Excel functions following step by step statistical procedure. Three CPUE data sets (gear types, gear categories, user categories) were subjected to statistical analysis.

  Journal of Fisheries, Volume 3 Issue 3 Pages: 275-284 December 2015; eISSN 2311-3111
  
Funding Source:
1.   Budget:  
  

CPUE was highest during March-April and September-November periods. Analysis of variance showed significant difference among catch rates of different fishing gears. The CPUE differed significantly among different months for net fence, gill net, cast net and scoop net during 2007; and for seine net, net fence, bag net and cast net during 2008.

  Journal
  


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