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.
Sardines (Sardinops sagax) are small silver fish that are also known as pilchards. They filter feed by straining tiny plants and animals (plankton) from the water.Short-lived and fast growing, they grow 0.60mm per day and reach 23cm in length within two years. shoal of sardines (Sardinops sagax). Pilchards reach sexual maturity in their first year. They have a long breeding season that stretches from September to February. The females each produce many thousands of eggs from which only one female and one male larva needs to reach maturity to keep the population stable.