{"id":4484,"date":"2026-01-06T08:42:37","date_gmt":"2026-01-06T08:42:37","guid":{"rendered":"https:\/\/komodopadartour.com\/?p=4484"},"modified":"2026-01-06T08:42:38","modified_gmt":"2026-01-06T08:42:38","slug":"aggregations-of-plectropomus-areolatus-and-epinephelus-fuscoguttatus-in-komodo-national-park-monitoring-and-management-implications","status":"publish","type":"post","link":"https:\/\/komodopadartour.com\/es\/2026\/01\/06\/aggregations-of-plectropomus-areolatus-and-epinephelus-fuscoguttatus-in-komodo-national-park-monitoring-and-management-implications\/","title":{"rendered":"Agregaciones de Plectropomus areolatus y Epinephelus fuscoguttatus en el Parque Nacional de Komodo: implicaciones para el seguimiento y la gesti\u00f3n"},"content":{"rendered":"
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Aggregations of Plectropomus areolatus and Epinephelus fuscoguttatus in Parque Nacional de Komodo,<\/a> Monitoring and Management Implications<\/figcaption><\/figure>\n\n\n\n

Parque Nacional de Komodo<\/a> (KNP), located in Eastern Indonesia, is not only famous for the Komodo dragon but also for its rich marine biodiversity \u2014 especially reef fish species like groupers<\/strong> (Serranidae<\/em>). Among these, two commercially valuable species \u2014 Plectropomus areolatus<\/em> (squaretail coral grouper) and Epinephelus fuscoguttatus<\/em> (brown-marbled grouper) \u2014 are known to form seasonal spawning aggregations<\/strong>, which have critical implications for both fishery sustainability and marine conservation efforts. <\/p>\n\n\n\n

Spawning Aggregations and Monitoring<\/strong><\/h2>\n\n\n\n

Spawning aggregations occur when large numbers of adult fish gather at specific sites and times to reproduce. These gatherings are behaviorally and ecologically significant because they enhance breeding success, but they also make fish especially vulnerable to fishing pressure. <\/p>\n\n\n\n

Researchers conducted a long-term monitoring program over five years<\/strong>, observing two aggregation sites within KNP. One site hosted both E. fuscoguttatus<\/em> y P. areolatus<\/em>, while another supported P. areolatus<\/em> alone. The surveys were carried out twice a month<\/strong>, allowing scientists to track patterns in fish numbers, size, and reproductive behavior. <\/p>\n\n\n\n

Seasonality of Aggregations<\/strong><\/h5>\n\n\n\n

The study found that aggregations consistently formed around the full moon between September and February<\/strong>, aligning with known reproductive rhythms in many reef fish species. Additionally, P. areolatus<\/em> occasionally aggregated during the new moon phase from April to July. Although actual spawning events were observed only once during the monitoring period, behavioral patterns and the predominance of adult fish strongly suggested that these aggregations were linked to reproduction. <\/p>\n\n\n\n

Evidence of Decline and Fishing Pressure<\/strong><\/h3>\n\n\n\n

Over the five years of data collection, researchers recorded a reduction in the average size of P. areolatus<\/em> individuals by up to 8 cm<\/strong>, alongside a decline in the number of E. fuscoguttatus<\/em> present at aggregation sites. These trends indicate possible fishing pressure on these populations<\/strong>, despite initial protective measures implemented by the park beginning in 2001. The continued presence of artisanal fishers targeting aggregation sites likely contributed to these observed changes.<\/p>\n\n\n\n

Management Implications<\/strong><\/h4>\n\n\n\n

Given that both species are long-lived and vulnerable to overfishing<\/strong>, the study emphasizes the need for stronger, precautionary management interventions. These include:<\/p>\n\n\n\n