aquaculture-2018-posters-abstracts

Aquaculture 2018

S e p t e m b e r 2 0 - 2 1 , 2 0 1 8

L i s b o n , P o r t u g a l

Page 36

Journal of

ISSN: 1307-234X

E u r o p e a n S u mm i t o n

Aquaculture, Fisheries

and Horticulture

pparent declines in abundance of mangrove crabs

Scylla spp

. in the coastal area of Bangladesh have prompted concern

regarding long-term determination of this important cultural and economic resource. From the survey of ten districts of

coastal area according to treatment T1, T2 and T3 the total production of the coastal area was decreased from 32255.06±178.18

mt to 25643.46±141.96 mt between 2013 and 2016 and the percentage of the total production of the experimental area was

declined 9.55, 15.36 and 20.50% within the year 2013-14, 2014-15 and 2015-16. The decreasing trends or regression type was

exponential and the equation was y = 6.724e0.81×; where R2 is 0.980. There is a significant trends in case of male, female and

immature mud crab of coastal area. In case of female mud crab total catch percentage was decreased from 43.11% to 27.95%

between 2013 to 2016. In case of male and immature mud crab total catch percentage was increased from 29.08% to 38.34%

and 27.81% to 33.71% between 2013 and 2016. Rising pressure of trap, line and catch by hand, and decreasing pressure of catch

by net was detected to catch mud crab in the experimental area. So, eco-friendly catch and juvenile culture of mud crab is to be

practiced until established mud crab hatchery to minimize the requirement of seed production of crab in aquaculture crab field.

Present status of mud crab population in Bangladesh

Binay Kumar Chakraborty, Azad S A and Sarker S

Department of Fisheries, Bangladesh

Journal of

Volume:12

DOI: 10.21767/1307-234X-C1-003

Fig.1.

Catch composition of mud crab population between

2013 and 2016 in ten districts under treatment T1, T2 and T3

Fig.2

. Decreasing catch percentage (%) of mud crabs

between 2013 and 2016. Number of replicates for each sub-

strate; crab collector n=169, crab fattener n=169 and Upazilla

office n=36