File:Annual report of the Commissioners of Inland Fisheries made to the General Assembly (1906) (14780223061).jpg

Identifier: annualreportofco36rhod (find matches)
Title: Annual report of the Commissioners of Inland Fisheries made to the General Assembly
Year: 1906 (1900s)
Authors: Rhode Island. Commissioners of Inland Fisheries
Subjects: Fisheries -- Rhode Island Fishery law and legislation -- Rhode Island
Publisher: Providence, The Commissioners
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
The length of time required to reach the fourth stage from the timeof hatching varies at Wickford from 10 to 21 days. The temperatureof the water is, in a great measure, responsible for this variation, butcareful records kept during 1905 seem to show that, while it is themost important, it is not the only factor. It will be necessary toexperiment further in order to fully establish the importance of thevarious factors, yet it may be said that the following certainly doexert considerable influence on the duration of the first three stages.In the order of apparent importance they are: temperature, food,current, density, and light. The effects of temperature, food andcurrent have already been described. Of the influence of the densityof the water little is known-; after a warm rain, however, moltingseems to progress more rapidly. The importance of the light fac-tor is as yet undetermined. 10. Liberation of the Lobsterlings.As fast as the fry reach the fourth stage they are dipped out in-
Text Appearing After Image:
REPORT OF COMMISSIONERS OF INLAND FISHERIES. 149 dividually and put by themselves in a retaining bag. As soon as asufficient number has been collected in this bag they are transportedto the place where they are to be liberated, in large galvanized ironcans with a loose cover over the top. A suitable shore, one composedof rocks, with a growth of short eel-grass or seaweed of some sort, isselected, and the young lobsters poured out just at the waters edge(Plate XXIV). The morning is the best time for transporting andliberating them. If the time during transportation is long, a tightcan with ice may be suspended in the can containing the lobsters;but where there is to be only two or three hours confinement in thecan, care in keeping it from the sun and frequent aeration of the waterby stirring, is all that will be necessary. The above plan is the result of experience. At first the lobsterswere liberated at the surface of rather deep water over a rocky ledge.The fry when poured out would

Note About Images