Elderly Maternal Fish
Traditional management practices aim to reduce the number of old, slow-growing fish, leaving more room and resources for younger, faster-growing fish. Most marine fish produce huge numbers of eggs. The assumption was that younger spawners would produce plenty of viable larvae.
However, 2005 research on rockfish shows that large, elderly females are far more important than younger fish in maintaining productive fisheries. The larvae produced by these older maternal fish grow faster, survive starvation better, and are much more likely to survive than the offspring of younger fish. Failure to account for the role of older fish may help explain recent collapses of some major US West Coast fisheries. Recovery of some stocks is expected to take decades. One way to prevent such collapses is to establish marine reserves, where fishing is not allowed and fish populations age naturally.
Read more about this topic: Fisheries Management
Famous quotes containing the words elderly, maternal and/or fish:
“... the task of youth is not only its own salvation but the salvation of those against whom it rebels, but in that case there must be something vital to rebel against and if the elderly stiffly refuse to put up a vigorous front of their own, it leaves the entire situation in a mist.”
—Jane Addams (1860–1935)
“Mothers have as powerful an influence over the welfare of future generations, as all other causes combined.”
—John Abbott. The Mother at Home; or the Principles of Maternal Duty, John Abbott, Crocker and Brewster (1833)
“There goes a saying, and ‘twas shrewdly said,
Old fish at table, but young flesh in bed.”
—Alexander Pope (1688–1744)