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Spawning takes place between December and March, and females leave the nest site immediately after depositing eggs. Age determination of lingcod (Chilton, D.E. The cross sections must be made at right angles to the length of the fin ray, and it is therefore important that fins be dried flat, with the cut surface at right angles to the fin rays. In addition, the distance the section is cut from the fin ray base is important, so all fins should be collected with the bases intact.One problem associated with using fin rays to age older fish is the center may be resorbed, resulting in the loss of the first two annuli. Aquat. J. After age two, females grow faster than males, with the growth of males tapering off at about age eight, and females continuing to grow until about age 12 to 14. It is therefore necessary to determine an average width for the first two annuli by examining the fins from juvenile fish. The validity of the fin-ray method of age determination for lingcod (

First evidence of validity of the fin-ray method of age determination for marine fishes. 1983. Publ. Sci.

60: 102 p.Cass, A.J., and R.J. Beamish. and R.J. Beamish. Fish. 1977. Up to age two, males and females grow at similar rates, with both reaching an average length of 45 centimetres (18 in). Can. The males migrate first, and establish nest sites in strong current areas in rock crevices or on ledges.


Lingcod Ophiodon elongatus At Santa Catalina Island, California Scientific classification Kingdom: Animalia Phylum: Chordata Superclass: Osteichthyes Class: Actinopterygii Subclass: Neopterygii Order: Sco Males actively defend the nest from predators until the eggs hatch in early March through late April.

Lingcod live a maximum of about 36 yearsLingcod are voracious predators, feeding on nearly anything they can fit in their mouths, including In 1977, Dr. Dick Beamish and Doris Chilton of the Ages are determined from fins in much the same manner as for other aging structures: sections of varying thickness are examined under a microscope, and the annuli, or rings, that are formed for each year of growth are counted and used to estimate the age. It is the only extant member of the genus Ophiodon. Spec. The lingcod or ling cod, also known as the buffalo cod or cultus cod, is a fish of the greenling family Hexagrammidae. An adult male can be distinguished externally from a female by the presence of a small, conical papilla behind the anal vent. Lingcod are endemic to the west coast of North America, with the center of abundance off the coast of Starting in October, lingcod migrate to nearshore spawning grounds.
Beamish, R.J. and D. Chilton. Age determination methods for fishes studied by the Groundfish Program at the Pacific Biological Station. 3: 182-188.McFarlane, G.A., and J.R. King. This measurement can then be used to estimate the position of the third annulus on older fish.

1982. Man. Fish. N. Am.

A slightly larger, extinct species, Ophiodon ozymandias, is known from fossils from the Late Miocene of Southern California. Females and males mature at age three to five years (61–75 centimetres (24–30 in)) and two years of age (45 centimetres (18 in)), respectively.

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