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. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. CALIFORNIA FISH AND 0AME 123 The tlurcl strp in this iiivrst i^iit ion will l»f to Jisccrtain yearly the success of spa^vninsentative net hauls in certain localities durinp: intermittent periods of the si)awning: season. Accu- mulated tlata of this luiture ^vill pvovide means for a measure of the abundance of the resultinp: adult fish and will aid in the explanation of the dominant year p;roni)s that come and fro within the commercial

. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. CALIFORNIA FISH AND 0AME 123 The tlurcl strp in this iiivrst i^iit ion will l»f to Jisccrtain yearly the success of spa^vninsentative net hauls in certain localities durinp: intermittent periods of the si)awning: season. Accu- mulated tlata of this luiture ^vill pvovide means for a measure of the abundance of the resultinp: adult fish and will aid in the explanation of the dominant year p;roni)s that come and fro within the commercial Stock Photo
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Contributor:

Book Worm / Alamy Stock Photo

Image ID:

RG5A98

File size:

7.1 MB (116.3 KB Compressed download)

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Dimensions:

2273 x 1099 px | 38.5 x 18.6 cm | 15.2 x 7.3 inches | 150dpi

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. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. CALIFORNIA FISH AND 0AME 123 The tlurcl strp in this iiivrst i^iit ion will l»f to Jisccrtain yearly the success of spa^vninsentative net hauls in certain localities durinp: intermittent periods of the si)awning: season. Accu- mulated tlata of this luiture ^vill pvovide means for a measure of the abundance of the resultinp: adult fish and will aid in the explanation of the dominant year p;roni)s that come and fro within the commercial catch. Also, it may show the actual condition of the fishery; that is, the same number of eg:<is and larvae obtained from year to year would tend to indicate a steady fishery, while annually decreasing; amounts would pi-obably indicate that (h'pletion was oeeurriufr. due to the killinfr of too many adults or s])aw2iers. Periodical scarcities of the efr^s and larvae, which are very likely to occur in any fishery, Avould i)robably be due to adverse spaAaiing conditions, namelj-: physical and chemical conditions of the water. In such studies, however, one must be careful to distinguish between the natural and artificial causes of the fluctua- tions in abundance of the young stages. At present, some phases of this program pertaining to the first step have been accomplished. The coastal waters have been explored for eggs and larvae to a distance of ten miles otfshore from Eureka to San Diego. Monterey Bay, wliieh is one of the main fishing centers, was thoroughly searched during April, 1929. At one time we made net hauls forty-five miles offshore but found no eggs or larvae. During the early part of May the search was extended north to Eureka, and throughout the latter ])art of May and all of June the search was to the south. It was on this southern cruise that we finally met with success, for upon entei-ing the Gulf of Santa Barbara eggs and larvae were found in considerable

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