摘要:

Growth, longevity and breeding characteristics of populations of the musselXenostrobus securisin the Swan Estuary are remarkably variable, both between one year and another and between upstream and downstream localities. These characteristics and their variability may be accounted for by the species' physiological responses and limitations to variable salinity conditions. The Swan Estuary is subject to extreme temporal and spatial variations in salinity. Temperature has only a secondary significance on the biology of the mussel in this estuary.

ISSN:0022-2933    

DOI:10.1080/00222936900770111

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

摘要:

It is impossible for trombidiform mites to defecate because they lack both an anus and a hind gut. Digestive residues remain in the mid-gut lumen and there are great differences in the capacity of species to transfer and store digestive residues in specific mid-gut lobes. The chigger mite species with the most precise pattern of faeces storage spontaneously ruptures the body wall in a narrowly defined region and extrudes a faeces-filled gut lobe through the rupture. This seems to be a normal function in the field and in healthy reproducing laboratory cultures and the process, named schizeckenosy, may be a secondarily evolved substitute for defecation.

ISSN:0022-2933    

DOI:10.1080/00222936900770121

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

ISSN:0022-2933    

DOI:10.1080/00222936900770131

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

ISSN:0022-2933    

DOI:10.1080/00222936900770141

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

ISSN:0022-2933    

DOI:10.1080/00222936900770151

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor