ISSN:0002-8487    

DOI:10.1577/00028487.1938.10493060

出版商:Taylor & Francis Group    

年代:1938

数据来源: Taylor

ISSN:0002-8487    

DOI:10.1577/00028487.1938.10493061

出版商:Taylor & Francis Group    

年代:1938

数据来源: Taylor

ISSN:0002-8487    

DOI:10.1577/00028487.1938.10493063

出版商:Taylor & Francis Group    

年代:1938

数据来源: Taylor

ISSN:0002-8487    

DOI:10.1577/00028487.1938.10493064

出版商:Taylor & Francis Group    

年代:1938

数据来源: Taylor

ISSN:0002-8487    

DOI:10.1577/00028487.1938.10493056

出版商:Taylor & Francis Group    

年代:1938

数据来源: Taylor

ISSN:0002-8487    

DOI:10.1577/00028487.1938.10493062

出版商:Taylor & Francis Group    

年代:1938

数据来源: Taylor

摘要:

This paper reviews the development of methods of cultivation and suggests a novel application of the methods used in oyster farming to sponge culture. It also contains reference to recent developments of sponge farming in the Bahamas and entrance of cultivated sponges of excellent quality into our markets. The world sponge trade is valued at $3,500,000 annually, the United States being the greatest market, amounting to 50 per cent of world production in 1927. It is shown that if the industry is to be maintained and sponges sold at reasonable prices, we must look to the cultivation of sponges to maintain an adequate supply.

ISSN:0002-8487    

DOI:10.1577/1548-8659(1937)67[46:SF]2.0.CO;2

出版商:Taylor & Francis Group    

年代:1938

数据来源: Taylor

摘要:

Several characters of shad from the Shubenacadie River, Nova Scotia, from Delaware Bay, and from Chesapeake Bay were studied in order to establish the racial nature of shad populations along the Atlantic Coast. For this purpose nearly 350 fish were secured. Counts of vertebrae, pectoral fin rays, and ventral scutes were established to be the best characters. Variation in the number of gill rakers from the different habitats is overshadowed by stronger influences of size or age, and for this reason the number of gill rakers is unsuitable for racial distinction.

ISSN:0002-8487    

DOI:10.1577/1548-8659(1937)67[52:ROPOTS]2.0.CO;2

出版商:Taylor & Francis Group    

年代:1938

数据来源: Taylor

摘要:

From October 8, 1936 to June 3, 1937 some 1,563 striped bass were tagged. The great majority of these fish belonged to the 1934 year class, which was extremely abundant in Chesapeake Bay.

ISSN:0002-8487    

DOI:10.1577/1548-8659(1937)67[67:ITSBRL]2.0.CO;2

出版商:Taylor & Francis Group    

年代:1938

数据来源: Taylor

摘要:

Belief in a general depletion of the virgin stocks of fish, and enthusiasm over the new procedure of hatching fish eggs and planting the fry that arose in the sixties of the last century served as powerful stimuli to the development of fishery services and the initiation of scientific study of the fisheries in both the United States and Canada. The early fish culturists were the persons who started this Society in 1870. The peak of the development of the early simple fish culture was reached about the turn of the century, since which time there has been retrenchment as well as attempts both to determine what practice is effective and to develop methods that will ensure the desired results.

ISSN:0002-8487    

DOI:10.1577/1548-8659(1937)67[87:FCAF]2.0.CO;2

出版商:Taylor & Francis Group    

年代:1938

数据来源: Taylor