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Description: |
ii, 8 pages illustrations, tables 23 cm. |
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Bibliography Note: |
Includes bibliographical references (page 8). |
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Contents Note: |
Contents: Collection of material -- Description of the ovaries -- Count of the ova -- Relation between fecundity and length, weight, and age -- Conclusions. |
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Summary, Etc. Note: |
Abstract: A study of the fecundity of the shad (alosa sapidissima) was undertaken in 1951 as part of the shad investigations of the U.S. Fish and Wildlife Service, to supply information to the Atlantic States Marine Fisheries Commission for fishery regulations along the Atlantic coast. The generally accepted figure for the annual egg production of the shad has been 25,000 to 30,000. In this study, the fecundity of 22 shad taken from the Hudson River in April 1951 ranged from 116,000 to 468,000 ova, depending on the age and size of the fish. |
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Abstract: Obviously, the number of eggs that could be taken by spawn-takers for hatchery purposes at any one time has generally been accepted as the total number of eggs a shad could be produced in a season. Since only a part of the eggs are ripe and ready for spawning at one time, these earlier records represent but a fraction of the number of ova actually produced during a spawning season. |
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Additional Physical Forms: |
Online version: Lehman, Burton A. Fecundity of Hudson River shad. Washington, U.S. Govt. Print. Off., 1953 (OCoLC)795026143 |