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dc.contributor.authorHunter, Rodger Allan.en_US
dc.date.accessioned2009-10-02T13:19:52Z
dc.date.available2009-10-02T13:19:52Z
dc.date.issued1976-10-02T13:19:52Z
dc.identifier.urihttp://hdl.handle.net/10464/2740
dc.description.abstractSeveral study areas were investigated at two Port Colborne terneries during the summers of 1973 and 1974 in an attempt to determine the influence of clutch size, time of clutch initiation, position in the colony, proximity to Ring-billed Gulls, vegetation and nesting substrate on the reproductive performance of the Common Tern. Hatching success and reproductive success (the number of chicks fledged per egg laid) were generally higher for 3-egg than 2-egg clutches but fledging (the number of chicks fledged per egg hatched) success was usually independant of clutch size. Hatching, fledging and reproductive success declined as a function of time of clutch initiation. Mean clutch sizes also generally declined as a function of time. Nests located in the center of the colony exhibited higher fledging success than those on the periphery. Rock-based clutches had a lower hatching success than clutches initiated on sand or dried vegetation. Reproductive performance did not appear to be related to proximity to Ring-billed Gulls or vegetation within the study area.en_US
dc.language.isoengen_US
dc.publisherBrock Universityen_US
dc.subjectCommon tern.en_US
dc.subjectTerns.en_US
dc.subjectWater birds--Ontario--Port Colborne.en_US
dc.titleA study of selected factors influencing the reproductive performance of the common tern (Sterna hirundo) at Port Colborne, Ontario in 1973 and 1974en_US
dc.typeElectronic Thesis or Dissertationen_US
dc.degree.nameM.Sc. Biological Sciencesen_US
dc.degree.levelMastersen_US
dc.contributor.departmentDepartment of Biological Sciencesen_US
dc.degree.disciplineFaculty of Mathematics and Scienceen_US
refterms.dateFOA2021-08-07T01:40:52Z


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