. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. PACIFIC SAURY 69 Length Frequency Method A total of 558 measurements taken during September 1972 was used for this method. Age Group 0 was readily discernable. In this age group, the most prominant mode was near 65 mm (range 45 to 145 mm) although several other peaks were noted, indicating a long spawn- ing season (Figure 5). Although sauries spawn throughout the year, CalCOFI egg and larval surveys indicate winter and spring months a
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. PACIFIC SAURY 69 Length Frequency Method A total of 558 measurements taken during September 1972 was used for this method. Age Group 0 was readily discernable. In this age group, the most prominant mode was near 65 mm (range 45 to 145 mm) although several other peaks were noted, indicating a long spawn- ing season (Figure 5). Although sauries spawn throughout the year, CalCOFI egg and larval surveys indicate winter and spring months as dominant spawning months (Smith, Ahlstrom, and Casey 1971).. 10 11 14 15 16 17 18 19 20 21 FORK LENGTH IN CM 24 25 26 27 28 29 FIGURE 5. Length-frequency distribution and distribution of the first five age groups of Pacific sauries collected aboard the R/V Alaska off northern California, Septem- ber 1972. The next mode occurred near 210 mm (range 200 to 220 mm), and within this mode Age Groups I and II were found with a predomi- nance of Age Group I. The second largest mode is located near 245 mm (range 230 to 265 mm). A majority of otoliths from this size group had two hyaline zones with some otoliths with one or three completed hyaline zones. Beyond this peak, two peaks at 260 and 275 mm oc- curred. These peaks contained four age groups; I through IV, with a predominance of 2 year old fish in the 260 mm size group and 3 year old fish in the last modal peak. Two factors that could account for the overlap are wide variation in size and mortality within older age groups. Another explanation for the overlap is the fact that sauries tend to school according to size, even though fish of different ages are found in these schools (Hatanaka 1956). As a result of comparing length frequency modes, several age groups were discernable. The 0 Age Group was quite distinct, whereas Age Groups I and IV were less well defined, possibly due to the small numbers of specimens in these length r
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