Survey on Traditional Mangrove Crab Identification Methods of Filipino Fishermen

• Main Authors: Cai, Qiuting W., Chua, Janella Kristine C., Magpayo,, Evanae Schon N., Po, Aliexandra Heart G., Sanchez, Jennifer O.
• Format: text
• Published: Animo Repository 2021
• Subjects: Philippines; mangrove crabs; Scylla serrata; species identification; traditional methods
• Online Access: https://animorepository.dlsu.edu.ph/conf_shsrescon/2021/paper_see/8; https://animorepository.dlsu.edu.ph/context/conf_shsrescon/article/1680/viewcontent/SEE__Survey_on_Traditional_Mangrove_Crab_Identification.pdf
• Institution: De La Salle University

The Philippines is one of the largest producers of mangrove crabs in the industry, but only three of the four Scylla species exist in the country. As one of the largest mangrove crab exporters, Filipino crab farmers must distinguish their harvest before catching them for crab farming since the growth and needs of crabs depend heavily on their species group. To determine the accuracy of widely used local traditional methods, survey questions were distributed to 34 respondents around the Philippines through selected online platforms. Data gathered included local methods for identifying mangrove crabs based on traditional ecological knowledge and experiences of the local fishers interviewed. The study found that 70.58% of those polled identify the species of crabs by looking at their claws and 55.88% observe the color of the crabs. Furthermore, 41.17% of respondents consider the width and size of the shell, while 11.76% examine the crabs' carapace. Unique methods to certain regions were reported, including observation of minor features and behavior of the crabs and reliance on texture, weight, and season. Difficulty in species identification of juvenile crabs has been reported but was also possible when the crabs turn 2-3 months old or grow to the size of a 5-peso coin or 5 centimeters. Feeding schedules and consistent pond management are also said as crucial tasks in growing mangrove crabs. The fishermen voiced out concerns and opinions regarding the technology development and government policies in the crab industry.