Contents. 1  Inflammatory joint effusion AND Stiff hip: Causes of All Symptoms. 2  Inflammatory joint effusion OR Stiff hip: Causes of Any Symptom. 3  Inflammatory joint effusion: Causes. 4  Inflammatory joint effusion: Introduction. 5  Stiff hip: Causes. 6  Stiff hip: Introduction.
Sardines are an important part of the food chain. Jupiterimages/Photos.com/Getty Images. Sardines live in large schools that may contain thousands of fish. They typically feed on plankton and are close to the bottom of the food chain; many different kinds of predators eat sardines, including humans.
Nutritional Content. The sardine is a rich source of nutrients. One can of sardines contains 351 mg of calcium, 2.7 mg of iron, 451 mg of phosphorus, 365 mg of potassium, 49 mcg of selenium and 178 IU of vitamin D. The fish is low in calories relative to the abundant nutrition it contains; one can provides 191 calories. can of sardines contains 840 mg of omega-3 fatty acids. A dose of approximately 500 mg daily confers beneficial effects. According to the American Heart Association, consuming sardines reduces the risk of cardiovascular disease.