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قراءة كتاب The Protection of Fresh-Water Mussels
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اللغة: English
الصفحة رقم: 1
Transcriber's note:
A list of corrections made can be found at the end of the book.
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THE PROTECTION OF FRESH-WATER MUSSELS
By R. E. Coker, Ph. D.
Director U. S. Biological Station
Fairport, Iowa
Bureau of Fisheries Document No. 793
WASHINGTON
GOVERNMENT PRINTING OFFICE
1914
[1]THE PROTECTION OF FRESH-WATER MUSSELS
By R. E. Coker, Ph. D.
Director U. S. Biological Station, Fairport, Iowa
Bureau of Fisheries Document No. 793
[2]CONTENTS.
| Page. | |||
| Present conditions | 3 | ||
| The mussel industry | 3 | ||
| Depletion of the resources | 4 | ||
| The interests of the community | 5 | ||
| Artificial propagation of mussels by the Government | 7 | ||
| Establishment of propagation | 7 | ||
| Results dependent upon protection | 8 | ||
| Protection | 9 | ||
| Essential considerations for effective legislation | 9 | ||
| Examination of protective measures | 10 | ||
| Two measures for immediate application | 10 | ||
| Measures not suited to existing conditions | 10 | ||
| Size limit—necessity and application | 12 | ||
| Exhaustive nature of the fishery | 12 | ||
| Waste illustrated | 13 | ||
| Size limit in relation to economy | 15 | ||
| Reasons for the proposed 2-inch limit | 16 | ||
| Details essential to effective legislation | 17 | ||
| Closed regions—necessity and application | 18 | ||
| Injury to spawning mussels and to young | 18 | ||
| Considerations determining size of closed regions | 19 | ||
| Practicable division of river systems illustrated | 20 | ||
| Procedure for establishing closed regions | 21 | ||
| Enforcement of the law | 22 | ||
| Summary of recommended legislation | 23 | ||
[3]THE PROTECTION OF FRESH-WATER MUSSELS.
By R. E. Coker, Ph. D.,
Director United States Biological Station, Fairport, Iowa.