摘要:

After twenty‐seven years of human absence on Hirta, the St. Kilda field‐mouse population in the Village Glen was numorically unaffected over two years, by a large‐scale military task‐force operation. The movements of field‐mice were experimentally examined. The trap revealed home range of a breeding male was about three‐quarters of an acre. Mice transported distances of up to 1,600 feet were able to return to the trap‐site in probably less than three hours. Fewer were able to do this over 2,800 feet. Mice were able to move up‐and downhill with equal facility. More mice were caught in the hour during and after dusk, than during the remainder of the night. A detailed s

ISSN:0370-2774    

DOI:10.1111/j.1469-7998.1963.tb01849.x

出版商:Blackwell Publishing Ltd    

年代:1963

数据来源: WILEY

摘要:

The lophophore of the rhynehonellid brachiopodNotosaria nigricansfrom New Zealand develops through trocholophous and schizolophous stages before reaching the final spirolophous condition. This development, and the structure and elliation of the spirolophe, are described in detail. The development of the digestive system is noted briefly: as in other Articulata there is no anus even at the earliest stages of growth.

ISSN:0370-2774    

DOI:10.1111/j.1469-7998.1963.tb01850.x

出版商:Blackwell Publishing Ltd    

年代:1963

数据来源: WILEY

摘要:

An account is given of autopsy examinations of Mammalia, Aves and Reptilia during the year 1961. Statistical analyses of results are added in the tables given. Various research problems studied during the year are briefly described.

ISSN:0370-2774    

DOI:10.1111/j.1469-7998.1963.tb01851.x

出版商:Blackwell Publishing Ltd    

年代:1963

数据来源: WILEY

摘要:

A rare copepod associated with eunicid worms is redescribed asEunicicola insolens(T.&A. Scott) nov. comb., and its occurrence recorded from the north‐east coast of Ireland, where it is found onEunice harassii.An interpretation of the mouthparts is appended, and a prior suggestion is reinforced that its affinities lie with the family Clausidiidae. Notes on the biology, especially as regards adhesion to the host, locomotion and feeding are also give

ISSN:0370-2774    

DOI:10.1111/j.1469-7998.1963.tb01852.x

出版商:Blackwell Publishing Ltd    

年代:1963

数据来源: WILEY

摘要:

The birth in captivity of a hippopotamus is described in detail.

ISSN:0370-2774    

DOI:10.1111/j.1469-7998.1963.tb01853.x

出版商:Blackwell Publishing Ltd    

年代:1963

数据来源: WILEY

摘要:

The Aswa river, a major tributary of the Nile, has its origins near Lake Kyoga, from which it is separated by a low watershed. The fishes described are the first to be collected from the Aswa. Two surprising features of the fish fauna are an endemicSynadontisspecies and an endemic and phyletically isolated species ofHaplochromis.Despite the presence of several Nilotic species absent from the Kyoga‐Victoria systems, the overall relationship of the Aswa species is with Lakes Victoria and Kyoga. It is suggested that the Aswa was once an affluent of Lake Kyog

ISSN:0370-2774    

DOI:10.1111/j.1469-7998.1963.tb01854.x

出版商:Blackwell Publishing Ltd    

年代:1963

数据来源: WILEY

摘要:

The external morphology of all stages ofC. ischnochelesis described, particular attention being paid to the chactotaxy. A comparison is made withC. tetrachelatusand the constancy between most of the chaetal series proves useful in the separation of the nymphal stages. Certain chaetal series, however, appear to be potentially important at both the specifie and generie levels of classification and the significance of these wider applications are briefly discussed. A precise study of the chactotaxy and its variations during post‐embryonic development indicates the existence of regressive evolution (i. e. neoteny) and it is for this reason that the adults of certain species possess, at least partially, a chaetotaxy which is characteristic of the nymphs of other species. The life history, based on a quantitative sampling technique, is described. Eggs are carried from June onwards and protonymphs appear in their highest numbers during July‐September. Mainly deutoand tritonymphs overwinter and maturity is reached the following June

ISSN:0370-2774    

DOI:10.1111/j.1469-7998.1963.tb01855.x

出版商:Blackwell Publishing Ltd    

年代:1963

数据来源: WILEY

摘要:

Previous work on shrews is reviewed and the methods used in this study are described. As a result of marking and recapturing shrews in a small area of mixed woodland, some new information on the ecology of shrews has been obtained. and previous observations on shrew biology have been confirmed. Growth of shrews progresses steadily until the winter when it is reduced until the spring moult. Females have on average two litters of from four to six young and the breeding season extends from April to July. The population can be divided into juveniles, subadults and adults using differences in pelage and weight. Peak periods of activity occur in early morning and late evening with a slight increase in activity in late afternoon in the summer.

ISSN:0370-2774    

DOI:10.1111/j.1469-7998.1963.tb01856.x

出版商:Blackwell Publishing Ltd    

年代:1963

数据来源: WILEY

摘要:

The known records of the occurrence of the erythristic polecat in Wales (the only part of Great Britain from which it has been noted) are listed and mapped, and show that this form is confined to a very limited area of West Wales, mainly along the coast of Cardigan Bay. The normal form has during the same period been widely distributed over most of Central Wales though thinning out towards the periphery, and has occurred also in one or two of the English border counties. It is suggested that the establishment and spread of the red polecat is of recent date. A similar limited distribution‐area of concentration of an erythristic recessive mutation in the polecat has been noted in western Russi

ISSN:0370-2774    

DOI:10.1111/j.1469-7998.1963.tb01857.x

出版商:Blackwell Publishing Ltd    

年代:1963

数据来源: WILEY

摘要:

The lugworms of the cold temperate waters of the Southern Hemisphere all belong to the genusAbarenicola.This genus falls naturally into two sections, whose members respectively possess and lack statocysts.The cysted section is confined to the Southern Hemisphere. Its component forms have hitherto been described either asassimilis(Ehlers) or asassimilisvar.affinis(Ashworth). This, however, is an oversimplification; the so‐called variety includes in fact a number of distinct forms.The characters which are useful in separating the forms are described and discussed. In particular, it is argued, contrary to the views of previous authorities, that valuable taxonomic information can be got from the nature of the statoliths in the cysted forms.According to the revised classification here presented, there are three species of cysted Abarenicola:(1) Abarenicola assirnilis (Ehlers) with five subspecies, assirnilis from Magellan Strait, Beagle Channel and South Georgia, brevior subsp. n. from Magellan Strait, Beagle Channel and the Falkland Islands, insularurn subsp. n. from Kerguelen, Macquarie, Auckland and Campbell Islands, devia subsp. n. from Victoria, Australia and New Zealand and haswelli subsp. n. from Tasmania. There are indications that additional local forms of this widely distributed species could be defined, given larger supplies of material.(2) Abarenicola an i s (Ashworth) with four subspecies, a#nis from New Zealand, clarki subsp. n. from Tasmania, africana subsp. n. from South Africa, and chiliensis subsp. n. from central Chile.(3) Abarenicola gilchristi sp. n. from South Africa.The cystless section of the genus is confined to the Northern Hemisphere. except for the species pusilla (Quatrefages) from central Chile. The only two available specimens of this species are redescribed, and reasons are given to explain why representatives of several other species have been incorrectly recorded as pusilla from time to time.The distributions of the forms are correlated with those of two of the coastal water types recently defined by Knox. Three nearly related forms (Abarenicola assirnilis assirnilis, A. a. brevior, and A. a. insularurn) occur in Sub‐antarctic Cold Temperate water, except for a single aberrant individual of A. a. assirnilis from Antarctic water. The other forms occur in the rather warmer and more saline Cold Temperate Mixed water.Temperature appears to be the most important factor controlling the geographical distribution of the caudate Arenicoli

ISSN:0370-2774    

DOI:10.1111/j.1469-7998.1963.tb01858.x

出版商:Blackwell Publishing Ltd    

年代:1963

数据来源: WILEY