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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.
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Showing 301 to 310 of 1999 (0.015 seconds)Spelling suggestions: "subject:"birds."" "subject:"girds.""
| 301 |
Biosystematics and ecology of Picoides villosus (L.) and P. pubescens (L.), (Aves : Picidae)Ouellet, Henri. January 1977 (has links)
No description available.
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| 302 |
A comparative field and laboratory investigation of Typhlocoelum cucumerinum (Digenea: cyclocoelidae) in various duck and snail hosts.Scott, Marilyn Elizabeth. January 1980 (has links)
An extensive field survey of 12 duck species yielded two morphologically distinct populations of Typhlocoelum (Digenea: Cyclocoelidae). Studies on the variability of these two populations in conjunction with experimental cross infections provided conclusive evidence that they must be considered as subspecies of Typhlocoelum cucumerinum. A laboratory comparison of their survival strategies revealed that, in the definitive host, Typhlocoelum cucumerinum cucumerinum develops slowly, survives for an extended time and has a high fecundity, whereas Typhlocoelum cucumerinum sisowi develops more quickly, has a shorter longevity and a lower fecundity. In the intermediate host, T. c. cucumerinum develops more slowly than T. c. sisowi. The almost complete segregation of these two subspecies into dabbling and diving ducks in the field may be maintained by an ecological separation of the ducks as well as intrinsic differences between the two host-parasite associations.
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| 303 |
[The] Energetics of foraging and competition in some Mexican hummingbirdsMontgomerie, Robert Dennis January 1978 (has links)
Note: / During 14 months at San BIas, Nayarit, Mexico, 1 studied the energy èconomlcs of foraging hummingbirds. Amazilia rutila and Cynanthus latirostris were always the commonest species present and l documented their responses to food and competitors as resources changed between habitats and seasons. / Durant 14 mois j'ai 4tudié les aspects énergétiques économiques de la recherche de la nourriture chez les colibris, a San Blas, Nayurit en Mexique. Amazilia rutila et Cynanthus latirosis étaient les espèces les plus communes tout au long de l'année et j'ai étudié leur réponses aux compétiteurs intra- et inter spécifiques à mesure que leur ressources changeaient entre les habitats et au cours des saisons.
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| 304 |
The effects of ultraviolet lighting on bird behaviorRoss, Megan Reinertsen 12 1900 (has links)
No description available.
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| 305 |
Use of Indices of Biological Integrity (IBIs) to assess wetland health in dry and wet conditionsWilson, Matthew J Unknown Date
No description available.
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| 306 |
Experiments on the development of song in the cardinal.Dittus, Wolfgang Peter Johann. January 1968 (has links)
No description available.
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| 307 |
Inter- and intra-specific recognition by song in the veery (Catharus fuscescens)Weary, Daniel Martin. January 1985 (has links)
No description available.
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| 308 |
Breeding success of the common puffin (Fratercula Arctica L.) on different habitats at Great Island, NewfoundlandNettleship, David N. January 1970 (has links)
No description available.
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| 309 |
Histochemical studies on the calcification of bone in the chick, Gallus domesticus.Goldberg, Harvey. January 1967 (has links)
No description available.
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| 310 |
Singing behavior and ecology of two species of wrensBrown, Roderick Neil January 1977 (has links)
No description available.
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