Descripción
The Freshwater fauna of the Seychelles has been relatively well-documented with 69 described species and some yet to be described. The macro-invertebrate fauna of the Seychelles has been less well-studied with around 137 species of insects, 14-16 species of Decapods, and it is estimated that there are around 20-25 species of Odonata, some of which are unique to the islands. There are also 15 species of freshwater snails and bivalves on the islands of the Seychelles. Many of the species of invertebrates are also unique to the Seychelles and are under threat from habitat destruction and introduced exotic species. The majority of the Seychelles' freshwater species are compiled in this collection from grey literature and the Seychelles' current species checklist. Its two primary goals are: 1. To distribute a taxonomic index of all species found in the nation that has been agreed upon nationally. 2. To link important information about these species' conservation relevance in the Seychelles to that checklist. This dataset is limited to freshwater species in its initial edition, but it will eventually be expanded to include other taxonomic groups (Freshwater aquatic plants). Furthermore, we use the release of this dataset as a chance to fortify collaborations in Seychelles, as the listed species and their taxonomic and conservation statuses require examination and discussion with the region's scientific community. Gaea Seychelles and Dr. Bruno Senterre, a scientist, received the first pre-published edition. The primary author of this dataset is Gaea Seychelles, with Dr. Bruno Senterre contributing to its improvement and verification. As such, this dataset will function as an open-source repository for a formal Seychelles freshwater species evaluation. We have examined the several standards that are available with GBIF through the primary 'cores' and extensions (http://rs.gbif.org/extension/gbif/1.0/) to compile this dataset. Lists of species were gathered and assembled from scholarly literature. This version will be updated by: 1. Adding vernacular/colloquial names 2. Adding the status of every synonym 3. Adding the invasiveness of species
Registros
Los datos en este recurso de lista de chequeo han sido publicados como Archivo Darwin Core(DwC-A), el cual es un formato estándar para compartir datos de biodiversidad como un conjunto de una o más tablas de datos. La tabla de datos del core contiene 211 registros.
Este IPT archiva los datos y, por lo tanto, sirve como repositorio de datos. Los datos y los metadatos del recurso están disponibles para su descarga en la sección descargas. La tabla versiones enumera otras versiones del recurso que se han puesto a disposición del público y permite seguir los cambios realizados en el recurso a lo largo del tiempo.
Versiones
La siguiente tabla muestra sólo las versiones publicadas del recurso que son de acceso público.
¿Cómo referenciar?
Los usuarios deben citar este trabajo de la siguiente manera:
Rose M, Henriette E (2024). Freshwater species of the Seychelles. Version 1.7. Gaea Seychelles. Checklist dataset. https://cloud.gbif.org/africa/resource?r=seychelles_freshwater_species_checklist&v=1.7
Derechos
Los usuarios deben respetar los siguientes derechos de uso:
El publicador y propietario de los derechos de este trabajo es Gaea Seychelles. Esta obra está bajo una licencia Creative Commons de Atribución/Reconocimiento (CC-BY 4.0).
Registro GBIF
Este recurso ha sido registrado en GBIF con el siguiente UUID: ae8d236f-58e8-485e-a2c7-e1e8ac1d500d. Gaea Seychelles publica este recurso y está registrado en GBIF como un publicador de datos avalado por Participant Node Managers Committee.
Palabras clave
Checklist; Freshwater checklist; Freshwater fish; freshwater crustaceans; freshwater macro-invertebrates
Contactos
- Proveedor De Los Metadatos ●
- Publicador ●
- Originador
- Proveedor De Los Metadatos ●
- Originador
- Punto De Contacto
- Investigador Principal
- Verificador
Cobertura geográfica
The Republic of Seychelles A conglomerate of 115 islands situated in the Indian Ocean near the east coast of Africa
| Coordenadas límite | Latitud Mínima Longitud Mínima [-90, -180], Latitud Máxima Longitud Máxima [90, 180] |
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Cobertura taxonómica
No hay descripción disponible
| Reino | kingdom, Animalia |
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| Filo | Arthropoda, Chordata, phylum, Mollusca |
| Class | Amphibia, Gastropoda, class, Insecta, Osteichthyes , Actinopterygii, Malacostraca |
| Orden | Decapoda, Hemiptera, Gymnophiona, Mugiliformes, Ephemeroptera, order, Lepidoptera, Diptera, Pulmonata, Trichoptera, Cycloneritida, Perciformes, Anura, Littorinimorpha, Cyprinodontiformes, Coleoptera, Odonata, Cypriniformes, Anguilliformes, Stylommatophora |
| Familia | Bulinidae, Eleotridae, Gyrinidae, Crambidae, Kuhliidae, Noctuidae, Aeshnidae, Mugilidae, Culicidae, Tingidae, Hydroptilidae, Anguillidae, Microdesmidae, Sesarmidae, Osphronemidae, Sooglossidae, NOT ASSIGNED, Pomatiidae, Pomatiopsidae, Ceratopogonidae, Nolidae, Canacidae, Ambassidae, Limoniidae, Hydrophilidae, Moringuidae, Varunidae, Ecnomidae, Poeciliidae, Erebidae, Helicopsychidae, Nabidae, Aplocheilidae, Neritiliidae, Indotyphlidae, Coenagrionidae, Cyprinidae, Hydrometridae, Cichlidae, Succineidae, Elmidae, Ephydridae, Muscidae, Limnichidae, Stratiomyidae, Veliidae, Leptophlebiidae, Corduliidae, Gobiidae, Libellulidae, family, Neritidae, Hyperoliidae, Leptoceridae, Dolichopodidae, Atyidae, Argiolestidae, Polycentropodidae, Phoridae, Atriplectididae, Palaemonidae, Kraemeriidae, Cecidomyiidae, Saldidae, Ochteridae, Lestidae, Pyralidae, Hydropsychidae, Deckeniidae, Ptychadenidae |
Datos del proyecto
The project aims to achieve a comprehensive freshwater biodiversity database to address conservation and management issues in the Seychelles. It will target notably freshwater fish, micro and macro invertebrates. The first component contributes aquatic data to the ‘Seychelles’ Holistic Biodiversity Database on species and ecosystems’ (Bio database) and the Global Biodiversity Information Facility (GBIF). Freshwater biodiversity data from scientific publications, museum collections etc will be compiled into the ‘Bio database’. The number of records and species in the databases will be the main measurable indicators. Component 2 targets baseline surveys and annual biodiversity inventories of fish, micro and macro invertebrates in 15 rivers including the collection of genetic materials through eDNA. All data collected will be integrated into the Bio database, eBioAtlas (https://ebioatlas.org/) and GBIF. The 3rd component is the Train-the-Trainer programme to advance the understanding of freshwater systems while developing capacity through internships, graduate programmes and guest lectures. 10 students from UniSey and 5 participants from participating organisations will be trained in identification of freshwater biodiversity, surveys, eDNA sampling and freshwater ecology and 2 Seychellois trained at graduate level in conservation of freshwater biodiversity. Component 4 is an outreach programme + Citizen Science for different target groups to raise awareness on the importance of freshwater ecosystems, and the production of 3 scientific publications of the status of freshwater biodiversity.
| Título | Developing a freshwater biodiversity information system for long-term conservation and management in the Seychelles |
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| Identificador | https://jrsbiodiversity.org/grants/gaea_seychelles/ |
| Fuentes de Financiación | Grant Amount: JRS Biodiversity Foundation $260,839 |
| Descripción del área de estudio | Seychelles rivers 1) Rivière Fond Boffay, Praslin island: National Park, Large Catchment, Easy access throughout course. Provide good accessibility from the mouth to source and can serve as good reference rivers for the distribution of species/communities and flows into mangrove 2) Rivière Nouvelle Decouverte, Praslin island: National Park, Large Catchment, Easy access throughout course. Provide good accessibility from the mouth to source and can serve as good reference rivers for the distribution of species/communities and flows into mangroves. 3) Rivière Kerlan, Mont Plaisir, Praslin island: Large Catchment, relatively long river. Flows through unprotected but well-preserved forests (being proposed for Protected Area status). Exits through degraded mangroves. 4) Rivière Pasquière, Praslin island: Flows through degraded ecosystems under restoration, Flows into mangrove. Difficult access from mid-course to source 5) Rivière Petit Cour, Praslin island: Flows through degraded ecosystems under restoration, Easy access. Flows direct to sea 6) Rivière Salazie, Praslin island: Flows through degraded ecosystems. Flows into mangrove. Difficult access from mid-course to source 7) Rivière Grand Anse, Mahe island: National Park (mid-upper course), Large Catchment, relatively long river Easy access from mouth to mid-course. Targeted for dam construction. Flows into mangrove. 8) Rivière Caiman , Mahe island: Relatively long river.Flows into mangrove. Difficult access from mid-course to source 9) Rivière Dauban , Mahe island: Relatively long river Flows into mangrove. Difficult access from mid-course to source 10) Rivière Royale, Mahe island: Anthropogenised river, Impacted by anthropogenic factors. 11) Rivière Grand Saint-Louis, Mahe island: National Park (mid-upper course), Large Catchment, relatively long river. Flows direct to sea 12) Rivière Mare aux Cochons, Mahe island: National Park (mid-upper course), Very large Catchment, relatively long river. Difficult access from mid-course to source. Flows into mangrove. 13) Grande Rivière, Silhouette island: National Park, Large Catchment, no major development. Flows into mangrove. Difficult access from mid-course to source. 14) Rivière Anse Mondon, Silhouette island: National Park, Large Catchment, no development. Difficult access from mid-course to source. 15) Rivière Grande Barbe, Silhouette island: National Park, Large Catchment, no development Flows into mangrove. Difficult access from mid-course to source. Note: There is room for extension of study areas, including more rivers. |
| Descripción del diseño | 15 principal perennial rivers are selected based on their importance in terms of length, size of water catchment and protected status, and their accessibility. These rivers will be surveyed once a year (minimum) twice a year during (North-west Monsoon and South-east Monsoon) using electrofishing methods, SASS (South African scoring system) netting, eDNA sampling and analysis where electrofishing may not be possible. |
Personas asociadas al proyecto:
Métodos de muestreo
15 principal perennial rivers are selected based on their importance in terms of length, size of water catchment and protected status, and their accessibility. These rivers will be surveyed once a year (minimum) twice a year during (North-west Monsoon and South-east Monsoon) using electrofishing methods, SASS (South African scoring system) netting, eDNA sampling and analysis where electrofishing may not be possible.
| Área de Estudio | The Republic of Seychelles |
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Descripción de la metodología paso a paso:
- Sampling design for data collection 1. Electrofishing method and barcoding for freshwater fish survey Electrofishing Electrofishing will be led by Gaea Seychelles and experts from MNHN. A generator (Dekka Lord 2000) will be used for the sampling of freshwater fishes. The portable machine that was used had a battery with an output power of 180 W. It gives rectangular impulses at a fixed frequency of 100 Hz or 400 Hz. The duty cycle is controllable and is of 5 to 25 %. It has three voltage outputs: 150, 200 and 300 V. Electric fishing is performed in wadable streams by progressing in an upstream direction; in that way the water stays clear in front of the operators. The method (non-lethal) consists in placing a fishing electrode near habitat shelters in which the animals are found; the electrode creates an electrical field, which has an attraction effect within a radius of a one-meter zone under average conditions. When a fish comes within this field, it is stunned; it can then be caught easily with a hand net. Snorkeling with mask and hand nets will be also used, if possible, as a complementary method to the electrofishing. Each species caught is identified on the field and released. To constitute DNA barcoding reference libraries a piece of fin will be taken while the fish will be anaesthetised (the fish is awakened in clear water before it is released). Fin clips will be stored and preserved in 95% ethanol for molecular analysis (partial COI gene). DNA analysis for freshwater fish Barcoding for fish will be done by MNHN. The adoption of Next-Generation Sequencing (NGS) by the field of DNA barcoding of Metazoa has been hindered by the fit between the classical COI barcode and the Sanger-based sequencing method. The method used is described in the paper Hinsinger et al. 2015: a framework for the sequencing and multiplexing of mitogenomes on NGS platforms that implements (I) a universal long-range PCR-based amplification technique, (II) a two-level multiplexing approach (i.e. divergence-based and specific tag indexing), and (III) a dedicated demultiplexing and assembling script from an Ion Torrent (now we use an Illumina) sequencing platform. Hinsinger et al. 2015 provides a case study of mitogenomes obtained for two vouchered individuals of fishes and show that this workflow enables to recover over 100 mitogenomes per sequencing chip on a PGM sequencer. Molecular reference libraries: towards a global biodiversity information system for species identifications The MNHN build since several years’ molecular reference libraries for freshwater fish living in Indo-Pacific islands and particularly in Indian Ocean, establishing lists of taxonomically valid species. The use of eDNA and COI barcoding relies necessary on the development of DNA barcode reference libraries for known species in order to foster automated assignment of unknown specimens to known species. For automation purposes, both stability of the reference libraries and reproducibility of the molecular identifications should be guaranteed. That’s why MNHN build these libraries studying and sequencing (when possible) types specimens of each species. The libraries have already the sequences of the gene needed for several species distributed in Seychelles. 2. Micro and macro-invertebrate sampling lankton net method: Plankton nets of 80, 125 and 200 mesh size were used in this research. Mesh size is an aperture or eye size in net. Sample are collected through two methods that is horizontal tow and vertical tow. One need to enter in water through boat trawler to collect water sample. The handling of plankton nets from margin has possibility of damage and clogging. The surface water sample is collected through horizontal tow by tying floaters on end of the ring and heavy material at other end of the ring. Volume of water that flow through net can be calculated by formula as mentioned below. lankton net method: Plankton nets of 80, 125 and 200 mesh size were used in this research. Mesh size is an aperture or eye size in net. Sample are collected through two methods that is horizontal tow and vertical tow. One need to enter in water through boat trawler to collect water sample. The handling of plankton nets from margin has possibility of damage and clogging. The surface water sample is collected through horizontal tow by tying floaters on end of the ring and heavy material at other end of the ring. Volume of water that flow through net can be calculated by formula as mentioned below. Plankton net method: Plankton nets of 80, 125 and 200 mesh size were used in this research. Mesh size is an aperture or eye size in net. Sample are collected through two methods that is horizontal tow and vertical tow. One need to enter in water through boat trawler to collect water sample. The handling of plankton nets from margin has possibility of damage and clogging. The surface water sample is collected through horizontal tow by tying floaters on end of the ring and heavy material at other end of the ring. Volume of water that flow through net can be calculated by formula as mentioned below. Micro and macro-invertebrates sampling and identification will be done in conjuction with our expert partner GroundTruth (South Africa). Micro and macro-invertebrates will be collected using the methods described in the South African Scoring System version 5 (SASS5, Dickens and Graham 2002 ), a rapid kick sampling technique designed for wadable rivers that is ISO 17025 accredited. Kick samples are collected from three major biotopes 1) Stones (2cm – 25cm and includes bedrock sheets) in and out of current, 2) marginal and aquatic vegetation in and out of current and 3) gravel, sand and mud. Each biotope is sampled for a specific time or area as per the SASS5 method and macro-invertebrates from each biotope are identified to a family level. Each family is prescribed a sensitivity score from 1 to 15 depending on the water quality requirements for the family. Based on the sum and averages scores per taxon an aquatic ecological condition is generated for the river. MiniSASS is a citizen science version of the SASS5 method (Graham, et al. 2004 ). For miniSASS, the combined biotopes are sampled for approximately 10 mins and a combined sample is identified down to an order level. Each order has been assigned a sensitivity rating depending on the average water quality requirements of the Order and the average score per Order is used to determine the river condition. Plankton nets will be used to horizontally sweep through the water to collect zooplankton in the 15 rivers. The net will be rinsed to wash its content into the storage tube. The Zooplankton will be identified using a microscope in the lab.
Metadatos adicionales
| Identificadores alternativos | ae8d236f-58e8-485e-a2c7-e1e8ac1d500d |
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| https://cloud.gbif.org/africa/resource?r=seychelles_freshwater_species_checklist |