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Protecting threatened Over-seas biodiversity
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Beginning of the study of grouper larvae in Saint-Martin !!

After training by specialists from the company ECOCEAN, AGRNSM agents began catching post-larvae to increase knowledge of the recruitment and colonization of fish on the underwater coastal habitats of Saint Martin.

Installation of larval capture systems © AGRNSM

A study to find out when and what species settle in the island’s coastal waters. The AGRNSM team is reinforced by a trainee who came especially for this mission and by volunteers. The study will take place over 7 months, with samples being taken at each new moon. The first results will be released at the end of the year.

The PCC method

PCC (Post-Larval Capture and Culture) is a technique for capturing and cultivating marine post-larvae. The post-larval fish is the last larval stage of their ocean life cycle. In the vast majority (more than 95%) these post-larvae disappear by natural predation. The PCC therefore consists in taking these larvae before this high mortality in order to reinforce the fish populations.

Saint-Martin

Concretely, in Saint-Martin, it is a question of exploring the periods of colonization on the shallow coastal bottoms, post-larvae of reef fish including Nassau groupers and Atlantic goliath groupers, after their first stage of life offshore via the deployment of luminous devices and artificial habitats for several months.

Highly threatened species

In addition to the lack of regulation, other threats such as human activities contribute to the destruction of essential grouper habitats: coastal development, discharges of wastewater, clearing of the coastline, overcrowding in reef areas, etc. In addition, coral reefs, a habitat frequented by the Atlantic goliath grouper and the Nassau Grouper, suffer particularly from the consequences of global changes, leading to a reduction in coral cover and episodes of coral bleaching. Better protection of its habitats will strengthen their conservation status.