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Hawaiʻian fishponds or loko iʻa, are a sophisticated method for raising a steady source of food that is accessible during storms and high surf when fishing can be dangerous. Perpetuating traditional fishpond practices is important to create more sustainable food resources in Hawaiʻi and ensure that such advanced cultural knowledge is not lost
SONAR, which stands for Sound Navigation and Ranging, is used on boats for navigation and to map out underwater landscapes. The world’s oceans are so vast, it would take 125 ships a full year to map the entire ocean floor with SONAR.
Scientists expect sea levels to rise approximately 3 feet (1 m) in the next 100 years due to global warming. This is not only due to the melting of polar land ice, but also “thermal expansion”, in which water increases in volume as it warms.
Have you heard of coral bleaching? That is what happens when corals lose their green or brown colored algae living inside of them due to environmental stress such as warmer temperatures. If conditions return to normal fairly quickly, the algae will come back; but if conditions change for too long then the coral will be permanently bleached and won’t be able to survive.
Many fish change gender over the course of their lifetimes. For instance, parrotfish generally begin life as female and then become male as they mature. They also travel in harems with typically one male escorting a group of females. If the male dies, another female in the harem may change into a male.
Researchers at the Scripps Institute of Oceanography at the University of San Diego are changing the way marine scientists can use microscopes to study life in the ocean. The team of researchers have successfully developed an underwater microscope (the Benthic Underwater Microscope, or BUM) that can observe marine organisms in their natural habitat at the scale of nearly one micron resolution. At this scale, the BUM is capable of imaging single cells underwater. To do this, it is built as a two-part system including a computer with a diver interface connected to an imaging unit. The imaging... (more)