SeyCCAT and Nekton co-financed five research projects led by different individuals in the Seychelles. Read more about the research projects undertaken on the Nekton Mission in Seychelles, here. All updates are derived from reports of the researchers.

Researchers: Stephanie Marie, Clara Belmont and Andrew Souffe.

Research Topic: Variability in trophic signatures of zooplankton and food web dynamics within Seychelles waters

Seychelles depends highly on fish, as their main source of protein, and planktons (small microorganisms in the water) happen to play a vital role in fish diet. However, the effect of climate change threaten the plankton communities. In order to ensure good fish quality for consumption the Seychelles Fisheries Authority (SFA) needs to observe how climate change is having an effect on the marine ecosystem  and in turn, influence the management plan for sustainable fisheries.

Researcher: Sheena Talma from the Ministry of Environment, Energy and Climate Change.

Research topic: Spatio-temporal abundance and distribution of ichthyoplankton with the Seychelles waters.

The Indian Ocean remains a region of scientific interest as little research has been conducted within its waters and only a handful have investigated zooplankton communities especially the occurrence of fish larvae and eggs throughout the water column. This project aims to identify species found at different locations throughout the Seychelles waters.

Ichthyoplankton surveys gives valuable information as to the spawning dynamics of a host of different species. With the advancement of genetics methods, scientists are now able to investigate both larvae as well as eggs, with some scientists arguing that fish eggs provide a more precise method to evaluate the spawning habits of fish populations because eggs are easier to track as unlike larvae they do not swim (Richardson et al. 2009). The findings will inform the preliminary species occurrence and spatial distribution of fish larvae in the Seychelles EEZ.

Researcher: Dr. Jeanne A. Mortimer

Research question: What species of seagrass and marine algae occur in the outer islands of Seychelles? How are the species distributed from island to island? What is the relationship between water depth and patterns of distribution and species composition? What is the maximum depth in which they can survive?

Jeanne, has so far been involved in shallow water collection from seagrass habitats in Poivre, St Joseph atoll, and Desroches Island (two sites). This involved collecting, curating and archiving sample from each site. Observer reports and photos taken by the submersibles and the ROVs indicated that large amounts of dead seagrass were raining onto the deep sea floor from above—at every depth surveyed during the expedition.

Researcher:  Jennifer Appoo – the Science and Projects Coordinator at the Seychelles Islands Foundation (SIF).

Research question will combine data on top marine predators from the Seychelles Islands Foundation with the data collected from the Nekton Expedition and will provide a complete picture of the marine predator community around Aldabra down to 500m.

A sixgill shark spotted on the dropcam at 300m at Aldabra (© Nekton, 2019)

Aldabra’s near-shore marine area is divided into three management zones namely tourism zones, food security zones and conservation zones. This type of zonation strategy within a marine protected area is the first in Seychelles. The research will investigate the abundance, diversity and distribution of marine predators around Aldabra from the shallow to the deep sea and the effectiveness of the zoning plan on these top predators. The results will provide valuable lessons for sustainable fisheries management for Aldabra and this model example can be replicated in other locations in the country through the Marine Spatial Planning process.

Newsletter of Seychelles Island Foundation

Jennifer in UNESCO Women in Science video.

Researcher: Damien Labiche assistant conservation officer from the Ministry of Environment, Energy and Climate Change.

Research Topic: Identification of deep-sea shark and rays

Sharks and rays play an important role in the ecosystem as apex predators.  Through a highly collaborative process our project aims to identify deep-sea sharks that may be collected on camera footage from ROV’s drop cameras and subs. The occurrence of species in the area will be key to be able to compare data sets with regional and international partners. This is an important undertaking as it will allow for preliminary data to be collected and possible shark species to be identified in the Seychelles, where previous records do not exist.

The researchers had the opportunity to share knowledge from the Nekton Mission through platforms such as the Encounter Edu. View episodes here:

Jennifer and Clara Belmont – https://encounteredu.com/live/broadcasts/submarine-q-a-290319-am

News items related to Nekton Mission: 

Seven Seychellois researchers to explore waters up to 500m deep.  (Seychelles News Agency)

Two Seychellois women awarded fellowships to Oxford to advance study of marine science  (Seychelles News Agency) 

Deep Sea Life, Issue 13 of 2019

Learn more about the Nekton Mission in Seychelles here.