Jérôme OLLIER’s Post

Diving for a greater cause! 💙 - Marine species identification, such as nudibranchs, is crucial for marine research as it helps scientists understand biodiversity, ecosystem health, and potential impacts of climate change. - At OceanVibration, we not only offer scuba diving experiences but also actively engage in citizen science initiatives. By educating our divers on identifying and documenting marine species, like nudibranchs, we contribute valuable data to ongoing research projects. - This collaboration between divers and scientists allows us to better protect and conserve marine environments. - Join us at OceanVibration for a unique diving experience that not only explores the wonders of the underwater world but also supports important marine conservation efforts. - #mauritius #mauritiusdiving #mauritiusunderwater #mauritiusexplored #scuba #diving #ocean #oceanlife #marinelife #uwphoto #uwphotography #uwvideo #macrovideo

Diver Observations on Arctic Charr (Salvelinus alpinus) Spawning Grounds in Llyn Padarn Sites of Special Scientific Interest (SSSI) - December 2010 is #MEDINDataAdvent Day 6 ❄️🎄 Llyn Padarn is a large, natural lake located at the foot of Snowdon alongside the village of Llanberis, North Wales. The lake is designated as a Site of Special Scientific Interest (SSSI) for its rare, genetically distinct Arctic charr (Salvelinus alpinus) population, the presence of the nationally scarce Annex II aquatic macrophyte, Luronium natans L. (Floating Water-plantain) and the exposure of geologically important Cambrian rock sequences. The Arctic charr population is one of only three naturally occurring populations in Wales and one of the southernmost in the UK. There has been concern in relation to the declining Arctic charr population in Llyn Padarn and the potential impact of the water quality of the lake on the population. This study was undertaken to investigate potential spawning areas in the lake for Arctic charr by a SCUBA diving survey. Knowledge of the location of the spawning grounds of charr in Llyn Padarn is important to inform management of the site for conservation of the species. The purpose of this data capture was to collected information so that any additional spawning grounds (to the one location known) could be identified along with any potentially important spawning sites. Data are held with Cyfoeth Naturiol Cymru / Natural Resources Wales https://hubs.la/Q02-5t3H0

Diver Observations on Arctic Charr (Salvelinus alpinus) Spawning Grounds in Llyn Padarn Sites of Special Scientific Interest (SSSI) - December 2010 is #MEDINDataAdvent Day 6 ❄️🎄 Llyn Padarn is a large, natural lake located at the foot of Snowdon alongside the village of Llanberis, North Wales. The lake is designated as a Site of Special Scientific Interest (SSSI) for its rare, genetically distinct Arctic charr (Salvelinus alpinus) population, the presence of the nationally scarce Annex II aquatic macrophyte, Luronium natans L. (Floating Water-plantain) and the exposure of geologically important Cambrian rock sequences. The Arctic charr population is one of only three naturally occurring populations in Wales and one of the southernmost in the UK. There has been concern in relation to the declining Arctic charr population in Llyn Padarn and the potential impact of the water quality of the lake on the population. This study was undertaken to investigate potential spawning areas in the lake for Arctic charr by a SCUBA diving survey. Knowledge of the location of the spawning grounds of charr in Llyn Padarn is important to inform management of the site for conservation of the species. The purpose of this data capture was to collected information so that any additional spawning grounds (to the one location known) could be identified along with any potentially important spawning sites. Data are held with Cyfoeth Naturiol Cymru / Natural Resources Wales https://hubs.la/Q02-5KxX0

A quick sketch piece from my sketchbook. Title: Scalloped Hammerhead Shark Media: Mixed Description: (Sphyrna lewini) Scalloped hammerhead shark is also called bronze, kinky-headed, or southern hammerhead shark. Its named “scalloped” after the shark’s frontal section of its snout, having two indentations on either side of the central indentation giving a scalloped look. Despite its known to be the most common of all hammerhead shark species. Its under IUCN critically endangered. It shows other hammerhead shark species will be even more rare! This species is specifically hunted in the shark’s fin trade. Scalloped Hammerheads fins are large in size and 'high fin needle content;' their fins are sold for US $100–120 per kilogram. This led them to be overharvest. Atlantic ocean side, overharvest had push its population to drop by 95%! Japan side of Philippine sea (Maybe also northern Taiwan side) may be the last place where this species can arrived in large schoals without fearing to get finned. They are coastal sharks, following the warm currents to eat sardines, mackerel, herring and occasionally cephalopods. Japan as the last known safe natural refuge for this species had push scalloped hammerhead diving tourism. #vanwangye #scallopedhammerhead #sphyrnalewini #hammerheadshark #taiwanwildife #japanwildlife #stopeatingsharkfinsoup #sharkfin #sharkart

Dytiscidae are commonly known as predaceous diving #beetles, with their #larvae knick-named water tigers due to their insatiable appetite. These #aquatic insects are found in #freshwater habitats worldwide. With elongated bodies and specialised adaptations for life underwater, they prey on small, aquatic organisms including #insect larvae and tadpoles. Have you spotted any interesting insects? #CnRconsulting #aquaticEcology

Got questions about Molokini? https://lnkd.in/d2G7ZPjX This guide covers everything you need to know, from snorkeling and diving tips to wildlife and conservation efforts. #MolokiniCrater #Snorkeling #HawaiiAdventures

Grey reef sharks (Carcharhinus amblyrhynchos) are famous for their incredible threat displays. Compared to normal [A ON THE DIAGRAM], when they feel threatened, grey reef sharks will hunch their backs and depress their pectoral fins down, causing them to swim in a very exaggerated manner [B ON THE DIAGRAM]; spiralling and looping through the water [C ON THE DIAGRAM]. Grey reef sharks perform this “agonistic display” as a type of “visual communication”. As they cannot speak, they use specific body motions as a way to let something (or someone!) know that they are coming too close - like a silent hiss or roar. If you are ever SCUBA diving or snorkelling with sharks and you see one behave in such a way, you are making the shark feel uncomfortable and it is trying to tell you to back off - like a dog growling or a cat arching its back. Ensure you keep a close eye on the shark, take note if you have backed it into a corner (against rocks or coral, or near the shallows), whilst slowly and calmly backing up to increase the distance between you. The shark will note that you have taken the hint. 📸 Grey reef shark - Sylke Rohrlach / WikimediaCommons 📸 Diagram - Myrberg Jr AA (1985). Understanding Shark Behavior. In: Cook E (Ed.) Sharks: An Inquiry into Biology, Behavior, Fisheries, and Use. Proceedings of the Conference Portland, Oregon USA.

🌊 Explore the World of extraordinary Blue Spotted Stingrays! The blue spotted stingrays (Neotrygon kuhlii) are among the most fascinating marine creatures… the Andaman Sea around Koh Lanta offers a unique opportunity to learn about them. ➡️ Educational Insights: - Unique Appearance: Their bright blue spots serve as a warning to predators about their venomous spines. - Habitat: Typically found in sandy or muddy areas near coral reefs, using these environments for camouflage. - Diet: They hunt small fish, mollusks, and crustaceans using electroreceptors. - Behavior: Known for their non-aggressive nature, they are often buried in sand during the day. - Ecosystem Role: Crucial in maintaining marine ecosystem balance by controlling prey populations. ➡️ Conservation Note: These stingrays face threats from habitat destruction and overfishing. Sustainable diving practices are essential to protect their habitat and ensure their survival. Join Palm Beach Divers for a diving trip and discover the wonders of the underwater world! 📅 Book your dive today: palmbeachdivers.com #PalmBeachDivers #KohLanta #BlueSpottedStingrays #MarineBiology #Conservation #UnderwaterEducation

Happy #WorldTurtleDay! Did you know REEF surveyors collect data on sea turtles? 🐢 While the main focus of the Volunteer Fish Survey Project is marine fish (and in temperate locations, select invertebrates and algae species), you can also record your sea turtle sightings while snorkeling or diving! Simply mark your sightings the same way that you do for fish. These data are helpful in determining how sea turtle populations are impacted by threats and changes in the ocean. 🌊🤿 Learn more here: https://lnkd.in/gAyGugcY 📷: Daryl Duda

Spearfishing: A Path to Nature Connection Spearfishing, an underwater hunting activity, offers a unique opportunity to forge a deep connection with nature. Immersed in the tranquil underwater world, spearfishers escape the daily grind and connect with the wonders of marine life. This immersive experience fosters a profound appreciation for the delicate balance of the underwater ecosystem. Spearfishing demands a deep understanding of marine ecology, cultivating respect for the interconnectedness of marine life. Spearfishers, often targeting specific, abundant species, minimize their impact on the ecosystem, promoting sustainable practices. The act of spearfishing instills a sense of stewardship, encouraging individuals to protect marine habitats, prevent pollution, and ensure the sustainability of fish populations. This responsibility often leads to active involvement in conservation efforts, preserving the health of our oceans. Spearfishing's rich history connects individuals to ancestral practices, honoring the deep bond between humans and the sea. This connection to tradition further strengthens the bond between individuals and the natural world. Responsible spearfishing involves adhering to local regulations, using proper equipment, diving with a buddy, respecting marine life, and leaving no trace. These principles ensure that spearfishing contributes to a deeper connection with nature while promoting sustainable practices and the preservation of marine ecosystems. Through responsible spearfishing, individuals can cultivate a profound connection with nature, fostering a sense of stewardship and appreciation for the underwater world. #diving #scuba #scubadiving #divtop #sea #underwater #spearfishing #fishing #ocean #watersports #freediving #oceanic #divingbuoy #divingfloat #divingsurfacemarkerbuoy #divingsausage #scubapro #oceanic #mares #snorkeling #divingsafety #divingEquipment #divingaccessory #divinglanyard #divingknife #divingmask #divingfin #divingwetsuit #divingglove #divinglight #freediving #divingsafetyproduct #DEMAshow #divingknife #divingfin #divingmask #watersports