. / ^9\ I JULY I AUG|SEPT|OCT|N0V| DEC | JAN | FEB | MAR |APR | MAY |JUNE|JULY| AUG|SEPT|oCT | Fig. 24. Seasonal variation in the condition factor A' of Merluccius hubbsi, for fish approximating to the mean length of either sex; for further explanation, see text. tinuous lines in Fig. 24. Now these curves show a steep fall in the value of K during the summer, which tends to level out towards autumn. This is an almost certain indication that this hake is a summer spawner, as other species of hake elsewhere are known to be. All temperate fishes hitherto studied reach their peak of condition just
. / ^9\ I JULY I AUG|SEPT|OCT|N0V| DEC | JAN | FEB | MAR |APR | MAY |JUNE|JULY| AUG|SEPT|oCT | Fig. 24. Seasonal variation in the condition factor A' of Merluccius hubbsi, for fish approximating to the mean length of either sex; for further explanation, see text. tinuous lines in Fig. 24. Now these curves show a steep fall in the value of K during the summer, which tends to level out towards autumn. This is an almost certain indication that this hake is a summer spawner, as other species of hake elsewhere are known to be. All temperate fishes hitherto studied reach their peak of condition just prior to spawning, and some show very quick recovery from the loss occasioned by that act. Thus the seasonal cycle takes the form of a harmonic curve, and the relative steepness of the left- and right-hand sides of the 'wave' depends («) upon the speed of recovery after
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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
