Identifier: annualreport101112190newy (find matches)
Title: Annual report
Year: 1902 (1900s)
Authors: New York (State). Forest, Fish and Game Commission
Subjects: Forests and forestry Fisheries Game and game-birds
Publisher: (Albany, N.Y. : The Commission)
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Biodiversity Heritage Library

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r less numbers.Mr. Winchester has made some recent observations on the Hydra, and hasreached the conclusion that it does not kill the trout fry to any considerableextent, although it certainly destroys eggs by clinging to them and with-drawing more or less of the fluid contents. At a Colorado station of theUnited States a species of Hydra was observed to kill trout fry, and it maybe that the species at Upper Saranac will eventually be classed among thefry destroyers. Mr. Winchester, however, has seen nothing so far to showthat the fry are injured by that animal. A gill parasite, commonly known as the fish louse, one of the degradedforms of the copepods, is very injurious in its effects upon trout and especi-ally yearlings, two-year olds and older fish. Unfortunately this is oneof the parasites which abound in all wild trout and salmon waters, andwhich appear to be one of natures checks on over production. The com-mon Adirondack species was introduced into hatchery waters at Caledonia,
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TROLLING FOR BLUEFISH — FIRE ISLAND INLET FOREST, FISH AND GAME COMMISSIONER. 179 and before its nature was discovered it caused heavy losses among thetwo-year old brook trout as well as fish of greater age. The only means of checking this parasite, available at most of ourstations, is the introduction of a surface-feeding fish which will consumethe swimming larvae of this crustacean. For this purpose it is believedthat the fresh-water killv will be most suitable for trout waters, as it is alover of cold, pure streams such as trout inhabit. Doubtless there areother native fishes which may become available, but this one is suggestedbecause its distribution in the State is rather extended, its size is small,and it would not, therefore, interfere with the natural or artificial repro-duction of trout. Furthermore, it would furnish suitable live food forthe large fish. It is a prolific species and when once established at a sta-tion it is reasonable to expect that its introduction would

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