. Annual report - New York Zoological Society. Zoology. ELEVENTH ANNUAL REPORT. 105 are safe from tlieir enemies and the cannibalistic tendencies of their parents. One of the numerous private ponds visited by the writer, a pond half a mile in length, was examined with great care and found to be totally lacking in gravel areas. Although it had been stocked several times with small-mouthed black bass, there had apparently been no natural increase. With a mud bottom it afforded no spawning surface whatever for this species. The writer recommended the introduction of numerous artificial spawning n
. Annual report - New York Zoological Society. Zoology. ELEVENTH ANNUAL REPORT. 105 are safe from tlieir enemies and the cannibalistic tendencies of their parents. One of the numerous private ponds visited by the writer, a pond half a mile in length, was examined with great care and found to be totally lacking in gravel areas. Although it had been stocked several times with small-mouthed black bass, there had apparently been no natural increase. With a mud bottom it afforded no spawning surface whatever for this species. The writer recommended the introduction of numerous artificial spawning nests, or the introduction of the large-mouthed bass which would not require gravel beds, but could spawn among. ARTIFICIAL SPAWNING NEST. the abundant water plants. It is probably unnecessary to add that there should be no fishing allowed during the spawning sea- son, which with most of the fishes mentioned is in the spring months. Xlimber of Fishes Required.—In stocking waters it is not nec- essary to have a large number of adult fishes. For a pond of about an acre in extent, twenty pairs of black bass will be sufiB- cient, and perhaps fifty pairs of any of the other kinds of fishes mentioned. These numbers will in fact suffice for still larger ponds and should be reduced for smaller ponds. When the con- ditions are right the progeny of the first year will usually stock. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original New York Zoological Society. New York, The Society
Size: 1678px × 1489px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1906
