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271. Large, predatory fish — such as tilefish, swordfish and king mackerel — tend to have higher levels of methyl mercury than do smaller fish because they're higher in the aquatic food chain.

272. The excreta of aquatic animals - fish, frogs, turtles, snakes, etc - contain similar refractory materials.

273. The total output of aquatic products was 45.13 million tons, up by 3 percent.

274. The preexistent experiences from other large countries with a great diversity of aquatic ecosystem are beneficial to the nationwide forthcoming watershed restoration and management in China.

275. Goss studied Daphnia magna, a tiny freshwater crustacean used in many aquatic toxicity studies.

276. Particulate matter in soils and aquatic systems reacts with and influences the biological activity of pesticides.

277. Heavy-metal toxicity could also be affected by climate change, said Marjorie Brooks, an aquatic toxicologist at Southern Illinois University in Carbondale.

278. If you think your child will enjoy splashing around with a big, smart, aquatic mammal,[http://sentencedict.com/aquatic.html] a dolphin experience might be a fine investment.

279. Hesperornis is an extinct genus of flightless aquatic birds that lived during the Late Cretaceous.

280. The LEX System is a novel technology that genetically transforms the aquatic plant Lemna to enable the expression of biologic product candidates.

281. Pace celebrates a winning hand. A real aquatic card shark!

282. A water plant with a showy purple flower, the Water Hyacinth, was a native of the Amazon Basin and is now seen as the most important nuisance aquatic plant worldwide.

283. The first Aromatic Aquatic fragrance from the contemporary Italian jeweller.

284. Ecological degradation mainly includes degradation of terrestrial and aquatic ecosystems.

285. We earmark more capital to increase the amount of agricultural and aquatic products to be exported.

286. Algal blooms, heavy growth of aquatic plants, algal mats and deoxygenation are common symptoms of eutrophication.

287. Nor should it be used in aquatic center recirculation lines, which receive low level bleach injection.

288. Any of various aquatic or marsh ferns of the genus Marsilea, having floating, four-parted palmate leaves rising from long runners.

289. In other words, this animal, though clearly a tetrapod, was primarily an aquatic creature whose immediate forerunners were essentially fish that had never left the water.

290. Finger said these chemosensory cells are found in most aquatic vertebrates, including sharks, bony fish and lampreys.