ISSN:0035-919X    

DOI:10.1080/00359196409519059

出版商:Taylor & Francis Group    

年代:1964

数据来源: Taylor

摘要:

A dredge of modified Agassiz design which has proved successful, particularly over rock bottoms, and is capable of being handled from small fishing vessels, is described.

ISSN:0035-919X    

DOI:10.1080/00359196409519060

出版商:Taylor & Francis Group    

年代:1964

数据来源: Taylor

摘要:

Red water caused primarily by a very high concentration of the dinoflagellateGonyaulax polyǵrammaStein, associated with another dinoflagellate,Prorocentrum micansEhrb., in smaller numbers, appeared in False Bay near Cape Town during March and the early part of April 1962. This bloom resulted in a mass mortality of fish and invertebrates when theGonyaulaxdied in large numbers. The cause of the fauna mortality could not be determined with certainty, but observations indicated that it was due primarily to the depletion of oxygen in the water by the decaying plankton, aggravated by the products of their putrefaction. It was shown that no toxins of the ‘mussel poison’ type were present, but there remains the possibility that a toxin of a type affecting only marine fauna was released. Details of the pattern of mortality are given and the hydrological and meteorological conditions associated with this phenomenon are described. It is suggested on the basis of published reports that mussel poisoning and mass mortalities of marine fauna are distinct phenomena caused by different species of dinoflagellates.

ISSN:0035-919X    

DOI:10.1080/00359196409519061

出版商:Taylor & Francis Group    

年代:1964

数据来源: Taylor

摘要:

The successful hybridization betweenParacheilognathus rhombeusandAcheilognathus lanceolatus, both of Japanese origin, is reported.

ISSN:0035-919X    

DOI:10.1080/00359196409519062

出版商:Taylor & Francis Group    

年代:1964

数据来源: Taylor

摘要:

A taxonomic analysis of the artificially produced hybrid between femaleAcheilognathus lanceolatusfrom Japan and maleRhodeus sericeus amarusfrom Holland is presented. The hybrids were phenotypical sterile males. They showed considerable variation in their counts and measurements. This feature is interpreted as a result of deficient genomic compatibility between the parental species.

ISSN:0035-919X    

DOI:10.1080/00359196409519063

出版商:Taylor & Francis Group    

年代:1964

数据来源: Taylor

ISSN:0035-919X    

DOI:10.1080/00359196409519058

出版商:Taylor & Francis Group    

年代:1964

数据来源: Taylor