Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 4 of 4 for “"Ring-billed gull"”.
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Seasonal variation in the reproductive biology of the ring -billed gull (Larus delawarensis)
The reproductive biology of the Ring-billed Gull (Larus delawarensis) was studied on Gull Island, Presqu'ile Provincial Park, Ontario, in 1976 and 1977. Early started clutches (comprising the majority of clutches on Gull Island) in 1977 produced more chicks per nest (2.20 ± 0.09) than late started …
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The influence of investigator disturbance on aggressive behaviour and breeding success of ring-billed gulls (Larus delawarensis) /
… and breeding success of individual pairs of ring-billed gulls nesting at two colonies near Port Colborne, Ontario. The insular colony was on an artificial breakwall, associated with the Welland Ship Canal, approximately 1 km off the north shore of Lake Erie. The mainland colony was adjacent …
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Broad reduction and adoption in ring-billed gulls (Larus Delaworensis): the potential for inergenerational conflict
… and intra-clutch hatch intervals in the Ring-billed gull (Larus delawarensis) were documented during the peak nesting period of two consecutive breeding seasons, at a colony near Port Colborne, Ontario. Egg size decreased with laying order; third laid eggs were significantly smaller than …
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Seasonal Dynamics of Avian Influenza Viruses in Ring-billed Gulls (Larus delawarensis) in Minnesota
… within the orders Charadriiformes (shorebirds; gulls) and Anseriformes (waterfowl) are reservoir hosts for low pathogenicity avian influenza viruses (LPAIVs), but their role in the transmission dynamics of highly pathogenic avian influenza viruses (HPAIVs) is unclear. The novel reassortant HPAIV …