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Korte broek Opprett
The yellow stingray (Urobatis jamaicensis) is a species of stingray in the family Urotrygonidae, found in the tropical western Atlantic Ocean from North Carolina to Trinidad. This bottom-dwelling species inhabits sandy, muddy, or seagrass bottoms in shallow inshore waters, commonly near coral reefs. Reaching no more than 36 cm (14 in) across, the yellow stingray has a round pectoral fin disc and a short tail with a well-developed caudal fin. It has a highly variable but distinctive dorsal color pattern consisting of either light-on-dark or dark-on-light reticulations forming spots and blotches, and can rapidly change the tonality of this coloration to improve its camouflage. Relatively sedentary during the day, the yellow stingray feeds on small invertebrates and bony fishes. When hunting it may undulate its disc to uncover buried prey, or lift the front of its disc to form a "cave" attractive to shelter-seeking organisms. This species is aplacental viviparous, meaning that the developing embryos are sustained initially by yolk and later by histotroph ("uterine milk"). Females bear two litters of up to seven young per year in seagrass, following a gestation period of 5–6 months. Though innocuous towards humans, the yellow stingray can inflict a painful injury with its venomous tail spine. This species is taken as bycatch by commercial fisheries and collected for the aquarium trade; it may also be negatively affected by habitat degradation. Nevertheless, it remains common and widespread, which has led the International Union for Conservation of Nature (IUCN) to list it under Least Concern.
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As the Official Sailmaker to the 35th America’s Cup, North Sails is proud to be an exclusive supplier to a historic generation of America's Cup sailing. Congratulations Emirates Team New Zealand! A world-class victory for the Kiwis and a new era for the oldest trophy in international sport.
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We came across this Massive Loggerhead Turtle taking a snooze in the coral with just his tail peaking out and he decided to wake from his slumber to say hello! Want to dive with turtles? Join us for a dive, visit cruisenautic.com.
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Experience the thrill of the world's slowest race! Join us as we navigate the seas, strategize for victory, and push our sailboat to the limit. Witness the challenges and advantages, including the limitations of our Bavaria and the threat from competitors. We're pushing for victory! At a top speed of 5 knots! #SailingRace #SlowestRace #Sailing #BoatHandling #Sailboat #Bavaria #SailingStrategy #BlueWaterSailing #BoatRace #Yachting
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March 14th...giornata della matematica, Pi Greco day. Perchè non utilizzare le cifre di π per costruire una spirale, la spirale di Archimede, da appendere in classe o nel corridoio? Se appesa sopra un termosifone o un'altra fonte di calore, diventa una divertente attività ed esperimento con cui scoprire alcune caratteristiche dell'aria: la spirale ruota e si muove perchè spostata dall'aria calda. L’aria calda è più leggera dell’aria fredda perché meno densa e sale verso l’alto. https://maestramonica.it/pi-greco-day-la-spirale-di-archimede-matematica/
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