Global ETD Search
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Showing 1 to 5 of 5 for “"Port Colborne, Ontario"”.
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Selected aspects of common tern reproductive biology
… were investigated at a Common Tern colony at Port Colborne, Ontario in 1976. In general three egg clutches hatched better than two egg clutches and early started clutches hatched eggs and fledged chicks better than late clutches; the fledging success of two and three egg clutches was similar. …
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Parental care in the common tern (Sterna Nirundo): sexual roles in a monogamous seabird
… throughout two breeding seasons at a colony near Port Colborne , Ontario. Thirteen and fourteen pairs of terns were chosen for intensive study in 1982 and 1983, respectively. The delivery of fish by males to their mates ("courtship feeding") occurred prior-to, during, and following the egg-laying …
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The influence of investigator disturbance on aggressive behaviour and breeding success of ring-billed gulls (Larus delawarensis) /
… 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 to the canal approximately 1 km east of the …
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Broad reduction and adoption in ring-billed gulls (Larus Delaworensis): the potential for inergenerational conflict
… consecutive breeding seasons, at a colony near Port Colborne, Ontario. Egg size decreased with laying order; third laid eggs were significantly smaller than first laid eggs. Hatching of the third egg was delayed from that of first and second eggs. Intraclutch egg size differences established …
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Human health and environmental risk assessments: politics or science?
… a “Community Based Risk Assessment” in Sudbury, Ontario, Canada, left me rather doubtful as to the validity of both the science involved and the level of community involvement in the process. After meeting other people who had participated in the same kind of process in other communities, I came …