Wounding of living mothers, living calves and dead calves by decade (1970s-2000s).

Mean and standard deviation of number and area of lesions are shown for whales sighted over four decades of study. All means were significantly different among decades for living mothers and calves (≤0.001, ANOVA) with the exception of living calves in the ‘70s and ‘80s. Sample size is indicated between parentheses. Data were collected using aerial photographs from 1974 to 2011 for living mother-calf pairs and necropsy photographs from 2003 to 2011 for dead calves. NA: no data available.Wounding of living mothers, living calves and dead calves by decade (1970s-2000s).