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Behavioural data on instar crab movement at different thermal acclimation
Mohamad N Azra1, Mhd Ikhwanuddin1, Ambok Bolong Abol-Munafi1
1Institute of Tropical Aquaculture, Universiti Malaysia Terengganu, Malaysia.
Data in Brief
|February 12, 2019
Summary
This study monitored crab behavior and movement before molting at various temperatures. Crabs showed distinct activity patterns related to acclimation temperature, offering insights into their physiological responses.
Area of Science:
- Marine Biology
- Crustacean Physiology
- Animal Behavior
Background:
- Understanding environmental influences on crustacean molting is crucial for aquaculture and ecological studies.
- Portunus pelagicus (blue swimmer crab) molting behavior is sensitive to culture conditions, including temperature.
- Previous research has explored thermal tolerance but detailed pre-molt behavioral data is less common.
Purpose of the Study:
- To investigate the behavioral responses of Portunus pelagicus to different acclimation temperatures, focusing on pre-molt activity.
- To quantify crab movement patterns before molting using advanced video analysis techniques.
- To establish a baseline of normal activity for comparison with stressed or altered conditions.
Main Methods:
- Utilized large-scale video recording (MPEG-TS files) of crabs at five acclimation temperatures (20°C, 24°C, 28°C, 32°C, 36°C).
- Employed Solomon Coder software for precise analysis of crab movement and behavior.
- Measured total crab movement in the 30 minutes preceding the molt from instar stage 8 to 9.
Main Results:
- Crab movement patterns varied significantly across the tested acclimation temperatures.
- Distinct changes in locomotor activity were observed leading up to the molting event.
- The study provides quantitative data on pre-molt activity in relation to thermal regimes.
Conclusions:
- Acclimation temperature directly influences the pre-molt behavior and activity levels of Portunus pelagicus.
- The methodology offers a novel and effective way to study crustacean behavior.
- Findings contribute to a better understanding of blue swimmer crab physiology and environmental interactions.
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