Browsing by Author "Evans C"

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Policy Versus Practice: School Food Practices Do Not Reflect Healthy Food Guidance in New Zealand Primary Schools
(Cambridge University Press on behalf of The Nutrition Society, 2025-10-20) Pillay D; Ali A; Wham C; Evans C
Objective: To examine how school food policies and perceived barriers influence food provision in New Zealand primary school canteens, using the ‘Healthy Food and Drink Guidance for Schools.’ Design: Cross-sectional analyses of school food menus, and school food policy and practices surveys completed by school leaders/principals. Setting: New Zealand primary schools. Participants: 239 primary schools completed the school food policies and practices survey, and 80 schools provided canteen menus. Results: Most schools reported having a healthy food and drink policy in their school (76.2%) and promoted healthy eating during school hours (87.4%). Two-thirds (69.5%) identified barriers to healthy food and drink provision, most commonly the convenience of ready-made foods (39.3%), and resistance from parents (34.3%). The number of reported barriers was not a significant predictor for the presence of a school food policy (OR-1.034, p=0.841). School menus (n=80) consisted of 16.4% ‘green’ items, 34.7% ‘amber’ items, and 36.8% ‘red’ items. There was no relationship between the percentage of ‘green’, ‘amber’, and ‘red’ items and the presence of a school food policy or reported barriers. More than a third (38.9%) of menus from schools that reported they had a ‘Plain Milk and Water’ only policy still contained sugar-sweetened beverages. Conclusions: Although most New Zealand primary schools had healthy food policies, this was not consistently reflected in healthy food items on canteen menus. Further research is needed to understand how systemic barriers, such as cost, convenience, and parental influence, affect policy implementation and school food provision.
Sexual and temporal variation in New Zealand bellbird song repertoires
(2021-10-01) Roper MM; Webb WH; Fukuzawa Y; Evans C; Harmer AMT; Brunton D
How song repertoires vary within species and change over time is well studied in male songbirds. However, variation in female song repertoires remains largely unstudied despite female song being much more common and complex than once assumed. We investigated the song syllable repertoire of the New Zealand bellbird ( Anthornis melanura ), a species where both sexes have complex but sexually dimorphic song. We compared songs at individual and population levels to investigate sex and temporal variation of syllable repertoires. We detected 96 syllable types in the population over four years, of which 58% were unique to males, 32% unique to females and 9% were shared between the sexes. The population syllable repertoire of both sexes changed substantially across years with similar turnover rates (Jaccard’s similarity coefficients; female 52.9–69.0%; male 58.6–73.7%). Furthermore, many syllable types, unique to each sex, varied in prevalence within the population across years. The syllable repertoire sizes of individuals were higher for males than females (13-32, n = 7 and 6-16, n = 8, respectively). Although these sample sizes were low, the temporal variation in syllable prevalence and turnover for individuals were similar to patterns at the population level. Overall, male and female bellbirds exhibited similarities in temporal patterns of yearly repertoire composition, with rapid changes in syllable prevalence, but females had fewer syllable types than males. We suggest that these similarities and differences are consistent with male and female song repertoires being driven by similar but not identical selection pressures.