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Analysis Of Anadara Tuberculosa Capture Analysis At The Manglares El Morro Wildlife Refuge And Protected Zone Of Guayas In 2022

Abstract:

Mangroves in Ecuador are affected by human activities such as logging, construction of shrimp farms and housing, urban development that alters the hydrological and geomorphological processes, overexploitation of resources with indiscriminate fishing, disrespect for fishing and capture bans, aquaculture, the introduction of exotic species that can displace native species; and environmental pollution by sewage, solid waste, agro-industrial waste, heavy metals and oil spills. Therefore, to evaluate the behavior of the capture of the concha prieta (Anadara tuberculosa) in the capture sites of the Manglares El Morro Wildlife Refuge (REVISMEN), an in situ data collection was carried out in a total of 48 landings monitoring during February to July 2022. As a result, the sizes ranged from 4.2 cm to 6.9 cm, with an average of 5.4 cm, which is positive since most catches are being made above the minimum catch size (4.5 cm). In terms of weight, the mean was 27.24, within a range of 22 to 32 g. The fish's average weight was 27.24, with a range of 22 to 32 g. On the other hand, it was determined through the Catch Per Unit Effort (CPUE) indicator that the highest peak was in May, where the indicator was 160 shells caught per fisherman during a day of collection, while in February, the trend was low with a value of 122, followed by July with 128. When comparing the annual CPUE it was evidenced that since 2016 the catch efforts have increased substantially, with the year 2022 being the highest peak, representing a significant increase in the fisheries of the shell resource. It is important to continue with the management and control of this protected area, emphasizing those sites where there is a higher rate of non-compliance with the law, to ensure this resource's sustainability and conservation.