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A recent study demonstrated that semipalmated sandpiper (Calidris pusilla) wing lengths have shortened from the 1980s to the present-day. We examined alternative and untested hypotheses for this change at an important stopover site, James Bay, Ontario, Canada. We evaluated morphometric patterns in wing length and bill length by age and sex, when possible, and assessed if wing shape has also changed during this time-period. We investigated patterns of morphological change in two additional Calidridine sandpipers, white-rumped sandpipers (Calidris fuscicollis) and least sandpipers (Calidris minutilla), to determine if shorter wing lengths are a widespread pattern in small sandpipers. We also examined allometric changes in wing and bill lengths to clarify if wing length declines were consistent with historical scaling relationships and indicative of a change in body size instead of only wing length change. We found that including sex and wing shape in analyses revealed important patterns in morphometric change for semipalmated sandpipers. Wing lengths declined for both sexes, but the magnitude of decline was smaller and not significant for males. Additionally, semipalmated sandpiper wings have become more convex, a shape that increases maneuverability in flight. Wing lengths, but not bill lengths, declined for most species and age classes, a pattern that was inconsistent with historical allometric scaling relationships. For juvenile semipalmated sandpipers, however, both bill and wing lengths declined according to historical scaling relationships, which could be a consequence of nutritional stress during development or a shift in the proportion of birds from smaller-sized, western breeding populations. Except for juvenile semipalmated sandpipers, we did not find evidence for an increase in the proportion of birds from different breeding populations at the stopover site. Given the wide, hemispheric distribution of these sandpipers throughout their annual cycles, our results, paired with those from a previous study, provide evidence for wide-spread reduction in wing lengths of Calidridine sandpipers since the 1980s. The shorter wing lengths and more convex wing shapes found in this study support the hypothesis that selection has favored more maneuverable wing morphology in small sandpipers. [ABSTRACT FROM AUTHOR]

The article presents study on the population of shorebirds in Ontario. Volunteer-based survey at stopover sites throughout the province were used to assess population trends of shorebirds over the period 1974-2009. Out of the 19 taxa that were estimated, 17 appeared to be declining in abundance. The total number of shorebirds recorded on surveys declined by four percent per year. Results of the survey are consistent with other migration surveys and breeding and wintering grounds.

Setting: During a period of regulatory uncertainty, a local public health unit in Ontario was notified of an exhibition for electronic nicotine delivery systems (ENDS) and novel tobacco delivery products (NTDs), specifically e-cigarettes and waterpipes, which have seen increasing use particularly among youth. Relevant statutes creating regulatory uncertainty included a new provincial Electronic Cigarettes Act (ECA) with certain sections awaiting proclamation, and a local waterpipe bylaw awaiting approval, which would have prohibited the use of these products in public spaces if they entered into force ahead of the exhibition date. Public health staff had concerns the event would normalize use of ENDS/NTDs, particularly among youth, and also planned to enforce already proclaimed ECA sections, as well as the existing Smoke-Free Ontario Act (SFOA) with regulations applicable to use of tobacco shisha in waterpipes., Intervention: Public health staff contacted event organizers and proprietors to communicate obligations under the SFOA and ECA, as well as share hypothetical implications from pending regulatory changes, including risk of charges for regulatory non-compliance if regulations came into force ahead of the planned event., Outcomes: Following discussion with health unit staff and legal consultation, the exhibition was cancelled., Implications: By directly communicating regulatory uncertainty, a public health unit was able to achieve local health goals. In this situation, public health advised exhibition proprietors of potential event disruption implicated by forthcoming regulatory changes. Subsequent cancellation of the event prevented potential adverse health impacts for at-risk groups. A similar communications approach could be used to achieve public health goals during a period of regulatory uncertainty.