Determination of Microplastic Accumulation and its Effect on Rabbitfish (Siganus guttatus) and Parrotfish (Scarus ghobban): A Case Study from the Local Market of Zamboanga City, Philippines

This chapter aimed to determine the abundance and characteristics of MPs ingested by the two fish and the link between the fish length and weight and MPs ingestion. In the last decade, interest in monitoring and managing plastic pollution has greatly increased. Several studies have been conducted that have demonstrated that MPs have a significant negative impact on public and environmental health. It has been a long-standing issue due to many MPs and must be addressed immediately. Due to their excellent site fidelity, Parrotfish and Rabbitfish are effective bioindicators of microplastic pollution in a specific region of concern. The samples (35 pieces each) of Rabbitfish Siganus guttatus and Parrotfish Scarus ghobban were randomly bought locally (Magay, Zamboanga City Public Market. The study confirmed MPs contamination in the fish samples sold in the local public market of Zamboanga City, Philippines. Rabbitfish Siganus guttatus has the most MPs in its guts. A regression study revealed a substantial inverse link between the weight and length of Rabbitfish and the Abundance of MPs but no such association for Parrotfish; the majority of MPs consumed by both species can be attributed to the location where they are taken. While red filaments are more prevalent in Parrotfish, blue filaments are more prevalent in Rabbitfish. The study's findings are concerning, and it is necessary to thoroughly evaluate MPs contamination in all fish species and other marine goods sold in Zamboanga City's market. Fish exposed to MPs directly come into contact with people and are dangerous to consume.