Abstract
Escape rates and behaviors of the invasive crabs Charybdis japonica and Portunus pelagicus were investigated in two commercial pots: a box-shaped pot with two slit entrances at the ends and a dome-shaped pot with two open funnels. A variation of the dome-shaped type with two plastic triggers installed in each entrance that served as non-return devices was also tested. Pots, each with one marked crab inside, were set in a pond that is connected to Kagoshima Bay, Japan. Escape rates over a 7-day period were observed while diving. Furthermore, escape behaviors of C. japonica were examined in a tank for both types of pots containing a single crab in each. Escape rates of crabs were highest in the dome-shaped pots because of the open funnel entrances, followed by those in pots with triggers installed, but there was no escape in the box-shaped pots because the tight slit entrances prevented the crabs from getting out.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
