ZIB

Hits per page

hits 1 - 2 | 2 hits

Sorting

Electronic Resource

Possibility of Movements of the African Migratory Locust in the Solitary Phase and the Dynamics of its Outbreaks (1953)

DAVEY, J. T.

[s.l.] : Nature Publishing Group

Nature 172 (1953), S. 720-721

add to mindlist on the mindlist

Details

ISSN: 1476-4687

Source: Nature Archives 1869 - 2009

Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics

Notes: [Auszug] During recent years, evidence has been accumulating which indicates that, although this is undoubtedly the area where phase transformation takes place, the population of locusts is not confined to it throughout the year, and that seasonal migrations of solitary locusts occur, followed by breeding ...

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1038/172720a0

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Electronic Resource

Population dynamics of Mytilicola intestinalis in Mytilus edulis in south west England (1978)

Davey, J. T. ; Gee, J. M. ; Moore, S. L.

Springer

Marine biology 45 (1978), S. 319-327

add to mindlist on the mindlist

Details

ISSN: 1432-1793

Source: Springer Online Journal Archives 1860-2000

Topics: Biology

Notes: Abstract The population dynamics of Mytilicola intestinalis Steuer in mussels (Mytilus edulis L.) from the River Lynher, Cornwall, England, have been studied over 3 years. By transplanting uninfested mussels from the River Erme, South Devon, into the Lynher mussel bed, the study was extended to the growth and development of new infestations under natural conditions. Female Mytilicola intestinalis are shown to breed twice, and two generations of parasites coexist for most of the year, with recruitment taking place in summer and autumn. One generation contributes its first brood to the autumn recruits before overwintering and contributing its second brood to the following summer's recruits. The other generation overwinters as juvenile and immature stages to contribute its two broods successively to the summer and autumn recruits. Environmental temperatures are believed to control the rates of development at all stages rather than acting as triggers in the onset or cessation of breeding at specific times. There is no evidence to support the contention that heavily infested mussels are killed, and parasite mortality is shown to be density-independent.