NDLTD Global ETD Search
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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.

Search results

Showing 11 to 20 of 101 (0.014 seconds)
11

The biology of some freshwater oligochaetes

Kennedy, Clive Russell January 1964 (has links)
No description available.
592
12

Terrestrial nematodes of the Antarctic region : taxonomy, biogeography and an ecological study

Maslen, Norbert Rolf January 1979 (has links)
No description available.
592
13

Gametogenesis and reproduction of cirratulus cirratus O.F. Müller (Polychaeta)

Olive, P. J. W. January 1969 (has links)
No description available.
592
14

Studies on the ability of the nematode Xiphinema diversicaudatum (Micol.) to transmit raspberry ringspot virus and to survive in plant-free soil

McNamara, David Gerrard January 1977 (has links)
No description available.
592
15

Studies on the nervous system of Hymenolepsis nana (Cestoda, Cyclophyllidea)

Fairweather, I. January 1978 (has links)
No description available.
592
16

The organization of behaviour in the polychaete Nereis virens Sars

Torrance, R. January 1980 (has links)
No description available.
592
17

Physiological studies on the eulittoral nemerteans Amphiporus lactifloreus (Johnston, 1828) and Lineus ruber (O.F. Müller, 1774)

Varndell, I. M. January 1981 (has links)
No description available.
592
18

The effects of oxygen deficiency and anaerobic conditions on the physiology of polychaete (neanthes)=(nereis ) virens (SARS)

Economides, Apollo Plato January 1974 (has links)
No description available.
592
19

The bionomics of the larval stages of Moniezia and other helminth parasites present in pastures, being an account of oribatid mites and their relation to anoplocephaline cestodes in Scottish pastures

Rayski, Czeslaw January 1945 (has links)
No description available.
592
20

Studies on the biology of the narcissus strain of Ditylenchus dipsaci (Nemotoda) in the host plant and in the soil

Webster, John Malcolm January 1962 (has links)
The first section of this thesis records the testing and standardising of techniques. Extensive experiments demonstrated that the Seinhorst mistifier technique could be used quantitatively. An in vitro bioassay technique, using onion seedlings, was developed for studying the behavour of Ditylenchus dipsaci and for use as a post treatment assay of its "infective potential". An in vivo bioassay technique was used for determining the stem eelworm population of soil. The seasonal change in the "infective potential" of eelworm populations was due to a combination of a physiological change in the eelworms and a change in the proportion of fourth stage larvae to adults. The eelworms infected the narcissus generally during the cool, wet months (November to early March) and did so via the epidermis of the young foliage. Host reaction to the presence of the eelworms was most severe when the eelworms infected the active meristem, and the build up of the eelworm population in the plant increased rapidly at a point which was probably associated with the physio- logical condition of the host plant. This build up of eelworms in the foliage and bulb reached its maximum at the height of the narcissus growing season. The migration of eelworms into the soil occurred throughout the year and mostly via the base of the bulb; the rate of migration being directly related to the eel- worm density in the host. Controlled laboratory experiments showed an interaction between the effects of humidity and temperature on eelworm movement through sand. The random movement of eelworms through the soil was partially modified by the local attractive forces of host plants. The spread of eelworm infection, which depended on soil conditions and the population density in the host reservoir(s), was relatively slow in the absence of external agencies. Eelworm wool was an additional aid to dispersal but its viability and infective potential were affected by temperature and humidity.
592

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