摘要:

The many enigmatic factors in the life cycle of the Atlantic salmon have long fascinated and long frustrated those working on this subject. This comprehensive review by Dr Michael Gardner collates and summarizes the findings of investigations from the turn of the century to the present day. The author also provides an objective assessment of several hypotheses relating to the reasons for the diverse behaviour patterns of the salmon.

ISSN:0022-1112    

DOI:10.1111/j.1095-8649.1976.tb04680.x

出版商:Blackwell Publishing Ltd    

年代:1976

数据来源: WILEY

摘要:

The location of lysozyme in fresh plaice (Pleuronectes platessaL.) tissues was studied using an immunofluorescent technique. An antiserum to a homogeneous sample of plaice serum lysozyme was prepared in rabbits and was shown to be monospecific by immunodiffusion and inhibition studies. This preparation, used in conjunction with fluorescent labelled sheep anti‐rabbit immunoglobulin, demonstrated lysozyme in plaice neutrophils, peritoneal macrophages, gill cartilage and epithelium, spleen, kidney, skin and mucus. The distribution of lysozyme in the skin and secreted mucus was affected by the method of killing the fis

ISSN:0022-1112    

DOI:10.1111/j.1095-8649.1976.tb04681.x

出版商:Blackwell Publishing Ltd    

年代:1976

数据来源: WILEY

摘要:

The length‐weight relationship and condition factor of 420 dolphin‐fish (Coryphaena hippurus) collected in Malta in 1974 were determined. The length‐weight relationship for the size range investigated was similar to that reported for the fish from North America. The main food items were flying fish and other fish and

ISSN:0022-1112    

DOI:10.1111/j.1095-8649.1976.tb04682.x

出版商:Blackwell Publishing Ltd    

年代:1976

数据来源: WILEY

摘要:

The literature describing the biology and control ofMyxosoma cerebralis(whirling disease) is reviewed. New data on the world distribution of the parasite are presented. It is concluded that the presence ofM. cerebralisis not an important limiting factor in salmonid fanningper sebut only limits methods of production.

ISSN:0022-1112    

DOI:10.1111/j.1095-8649.1976.tb04683.x

出版商:Blackwell Publishing Ltd    

年代:1976

数据来源: WILEY

摘要:

The rate of oxygen consumption by sticklebacks has been studied by long‐term continuous‐flow respirometry. Exposure to 1 p.p.m. zinc in calcium‐free water causes wide variations in individual responses, but oxygen uptake tends to rise and then become extremely erratic, before declining as death approaches. Behavioural abnormalities such as increased ventilation rate, loss of balance, and long periods of inactivity alternating with spasmodic swimming also occur. Exposure to 6.5 p.p.m. zinc in high‐calcium water generally causes a rise in oxygen consumption, followed by fluctuations in the rate of uptake, but no behavioural abnormalities occur and deaths are rare even after exposure for 400 h. If restored to zinc‐free water after 40 h exposure to zinc, recovery is generally complete, although fluctuating rates of oxygen uptake persist. These results are discussed in relation to previous work on the effects of heavy metals on fish re

ISSN:0022-1112    

DOI:10.1111/j.1095-8649.1976.tb04684.x

出版商:Blackwell Publishing Ltd    

年代:1976

数据来源: WILEY

摘要:

Juvenile mullet are identified at the stage at which they first enter estuaries (10–50 mm in most species) through the use of dentition characteristics and lateral line scale counts. Techniques which simplify the determination of these features are described and a key to the 15 South African species is provide

ISSN:0022-1112    

DOI:10.1111/j.1095-8649.1976.tb04685.x

出版商:Blackwell Publishing Ltd    

年代:1976

数据来源: WILEY