The pacific sardine is a small, blue-green fish with white flanks and a set of dark spots along the middle (1). While this species can live to 13 years maximum, the average lifespan is 5 years (1). In addition, pacific sardines feed on plankton while being the designated prey for many fish, marine mammals, and seabirds (1). This particular species is not subject to overfishing although the latest population estimate is below that level (1). Observation of fish movement is a prominent component in regard to fisheries ecology and population dynamic (2). The sardine presents a defined large-scale seasonal migration with larger and older fish found in the northern area of their geographic range during the summer (2).
(1) Pacific Sardine. (n.d.). Retrieved from https://www.fisheries.noaa.gov/species/pacific-sardine https://www.fish...
(2) McDaniel, J., Piner, K., Lee, H. Hill, K. (2016) Evidence that the Migration of the Northern Subpopulation of Pacific Sardine (Sardinops sagax) off the West Coast of the United States Is Age-Based. PLoS ONE, 11(11), e0166780. DOI: 10.1371/journal.pone.0166780
(Photographs) Peter J. Bryant, University of California, Irvine
- Pelagic Ocean