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What’s Killing Endangered Sawfish in Florida?
  + stars: | 2024-04-15 | by ( Patricia Mazzei | ) www.nytimes.com   time to read: 1 min
Fishing guides in the Florida Keys began reporting unusual sightings to Ross Boucek last fall. Small bait fish, especially at night, would start spinning in tight circles in the water, seemingly in distress. As the months went by, more reports trickled in to Dr. Boucek, a biologist with the Bonefish & Tarpon Trust, a nonprofit conservation group. Bigger fish — jacks, snook — were swimming in spirals or upside down in the shallow waters of the Atlantic Ocean and Gulf of Mexico. They held meetings, took samples of the water and fish and tried to figure out what might be causing the fish to behave so strangely.
Persons: Florida Keys, Ross Boucek, Boucek, snook Organizations: Tarpon Trust Locations: Florida, Gulf of Mexico
Strange as it sounds, I always recommend going snorkeling or scuba diving when visiting Denver. The Denver Downtown Aquarium offers indoor cage diving, scuba diving, and snorkeling. But I think one of the best things to do is snorkeling in the Denver Downtown Aquarium. AdvertisementPlus, in the aquarium tank, you don't have to worry about harming a fragile coral reef as you dive or snorkel. Zanny Merullo SteffgenIf you're a certified scuba diver, the Denver Downtown Aquarium offers fish ($225) and shark ($235) diving experiences.
Persons: who's, , I've, gawking, you've Organizations: Denver, Denver Downtown Aquarium, Service, The Downtown Denver Aquarium Locations: Colorado, Denver
In January 2018, a female crocodile in a Costa Rican zoo laid a clutch of eggs. While crocodiles can lay sterile eggs that don’t develop, some of this clutch looked quite normal. In this case, life did not, uh, find a way, as the egg eventually yielded a perfectly formed but stillborn baby crocodile. In a paper out Wednesday in the journal Biology Letters, a team of researchers report that the baby crocodile was a parthenogen — the product of a virgin birth, containing only genetic material from its mother. Here’s how a virgin birth happens: As an egg cell matures in its mother’s body, it divides repeatedly to generate a final product with exactly half the genes needed for an individual.
Persons: ” —, parthenogenesis Organizations: cobras, California condors Locations: Costa Rican, sawfish
Sereno and his team returned to their work with Spinosaurus in search of answers about what life had really been like for the fearsome dinosaur. James GurneyNext, the team turned to Spinosaurus’ tail. Dr. Frank Fish, tail mechanics expert and professor of biology at West Chester University of Pennsylvania, took the lead. Fish compared the Spinosaurus tail with those of alligators and other reptiles and found the dinosaur would have been too rigid to function well underwater. Spinosaurus fossils have largely been found in the riverbank deposits of Niger’s inland basins, which are distant from prehistoric marine coastlines.
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