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The life history of Orius tristicolor (White) in the laboratoryAbdellatif, Ahmed Hassan, 1935- January 1965 (has links)
No description available.
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Ultrastructural studies of the developmental morphology and dynamics ? of encapsulation of Litomosoides carini in cotton rats and white ratsOgbogu, V. C. January 1984 (has links)
No description available.
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Biological studies on Dicondylus indianus (Olmi) (Hymenoptera: dryinidae), with particular reference to foraging behaviourSiahmazgi, Ahad Sahragard January 1989 (has links)
No description available.
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Mortality patterns in natural populations on mammals and their consequencesPromislow, Daniel E. L. January 1990 (has links)
No description available.
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Life history of Spanogonicus albofasciatus (Reuter) in the laboratoryMusa, Musa Saeed, 1933- January 1965 (has links)
No description available.
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Oceanographic influences on squid population variability : Martialia hyadesi in the western South AtlanticAnderson, Cairistiona Isobel Haig January 2002 (has links)
It has long been recognised that the life cycles of the major exploited ommastrephid squid species are closely related to oceanographic features, and that environmental variability may provide a significant stimulus for variability in the species abundance and distribution. In this thesis, the relationship between oceanographic processes and population variability for the ommastrephid squid <i>Martialia hyadesi</i> in the western South Atlantic is investigated using a geographic information system (GIS) (ARC/INFO<sup>(c)</sup> v. 7.2.1., ESRI Inc. 1999). From this analysis, it was clear that the oceanographic environment of the region does influence the abundance and distribution of <i>M. hyadesi</i>. However, the precise mechanisms by which this occurs are not determined. In the west of the study region, near the Patagonian Shelf, it appears that the distribution of <i>M. hyadesi</i> is intimately linked to that of the Falkland (Malvinas) Current, and that variability in the behaviour of this current may influence the annual abundance of the squid in the Patagonian Shelf squid fisheries. In the waters around the Falkland Islands (Malvinas), it appears that the 'population' of <i>M. hyadesi</i> may exist in two alternate states depending on its abundance. In most years, the squid occur at low densities, widely dispersed both in time and space. In exceptional years, the squid are far more abundant and are both spatially and temporarily aggregated. Although, no small juvenile or paralarval specimens of <i>M. hyadesi</i> were collected during this study, such specimens were collected for other squid species, and their distribution was successfully related to environmental factors. Both water mass type and water depth influenced the number of squid caught, and appeared to influence the species composition of the catches. Evidence was also found supporting the hypothesis that <i>M. hyadesi</i> does not occur near South Georgia during the austral summer and is extremely unlikely to spawn there.
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A model of fall chinook salmon (Onchorhynchus tshawytscha) life historyHirai, Takayuki 13 March 1990 (has links)
The research involved development of two ecological
simulation models to explain the complex dimensionality of
chinook salmon (Oncorhynchus tshawytscha) life history
structure (represented by the age composition of the
spawning stock) and management difficulties entailed in the
complexity.
Since different sizes of chinook salmon are thought to
adapt differently to heterogeneous habitats, age composition
of the spawning stock is determined by characteristics of
the habitats of the substocks. Numerical properties of
substocks result from the incorporation of individual
spawners in different age classes and each substock performs
differently because their age compositions are distinctive.
A stock or population consists of substocks whose age
compositions are concordant with their habitats. The
productive capacity of a population will result from the
incorporation of substocks. If habitat structures of
streams are different, the age and size compositions and
productive capacity of the populations may differ.
Selective harvesting affects spawners in different
ways, so that age compositions must be deformed differently
by fishing pressure. Once the age composition deviates from
the natural age composition, the productivity of the
population will decrease.
Population dynamics are strongly correlated with
substock structure which is determined by habitat structure
in a stream system. Hierarchical population structure make
fisheries management difficult and requires not only
quantitative but also qualitative analysis on the
populations in relation to habitat classification. / Graduation date: 1990
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Enhanced virtual manufacturing : advanced digital mock-up technology with simulation variancesOscarsson, Jan January 2000 (has links)
No description available.
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Baroclinic developments in jet entrances and exitsHare, Sylvia January 1999 (has links)
No description available.
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We Kaonde we don't migrate : the stretching of contemporary Kaonde life-worlds between rural and urbanSamuels, Fiona January 2001 (has links)
No description available.
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