The mud crab (Scylla serrata) behavior in different inclination angles of funnel and escape vent for trap net

Dian Purnama Fitri , Aristi (2017) The mud crab (Scylla serrata) behavior in different inclination angles of funnel and escape vent for trap net. The mud crab (Scylla serrata) behavior in different inclination angles of funnel and escape vent for trap net, 10 (2). pp. 182-190. ISSN 18449166, 18448143

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Official URL: http://www.bioflux.com.ro/journal/

Abstract

Mud crab (Scylla serrata) is one of the most valuable commodities among the Portunidae group that is caught by collapsible trap in Semarang, Indonesia. The trap entrance (funnel) is designed to allow adult crabs to pass in and prevent them from passing out, with the help of inclination angles. The other design uses escape vents that allow smaller crabs to escape. The trap used in this experiment was constructed of PE 210D/6 ¾ inch iron rode frame with 20o, 30o, 40o, 45o and 60o inclination angles, and 2, 3, 4 cm high escape vents. The objective of this experiment is to analyze mud crab behavior in different inclination angles of funnel and escape vent for trap net. The method used in this research is laboratory experiment of 2 life stages; sub-adult carapace width (CW < 10 cm) and adult carapace width (CW > 11 cm) crabs, by counting the crawling time and escape rate. Results show that the 40o inclination makes it easier for adult crabs to pass than the sub-adult crab and the 4 cm high escape vent enables 92.30% of sub-adult crabs to escape and keeps 69% of adult crab stuck in the trap. The conclusion found that the slope angle of 40° and a gap for passage of 4 cm providing opportunities mature crabs trapped in trap. Key Words: mud crab, crawling,

Item Type:Article
Subjects:S Agriculture > SH Aquaculture. Fisheries. Angling
Divisions:Faculty of Fisheries and Marine Sciences > Department of Fisheries
ID Code:74661
Deposited By:Mr Instrumentasi MIPA
Deposited On:23 Jul 2019 15:48
Last Modified:05 Nov 2019 16:54

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