Overview of analysed specimens.

<p>Overview of analysed specimens.</p

Binomial regression model showing the functional relationship between the presence of corpora (purple polygon) in female harbour porpoises from the German North Sea and Baltic Sea in relation to their age as determined by GLG.

<p>The filled area indicates the 95% confidence interval of predicted values. The red line within that area indicates the predicted average probability of finding corpora within specimens at the given age; the blue dashed line marks a probability of 50%, with the red solid line indicating the corresponding age based on the intersection of the blue dashed line with the x-axis; samples are indicated as dark grey dots; a purple circle around data points indicates animals below the age threshold showing at least one corpus, an orange circle indicates animals above the threshold showing no corpora; background histogram (orange) shows number of animals (secondary y-axis) across tooth age classes (at 1-year intervals).</p

Model diagnostics for the binomial regression model of the probability of detecting corpora (models c1 and c2).

<p>Model diagnostics for the binomial regression model of the probability of detecting corpora (models c1 and c2).</p

Coming of age: - Do female harbour porpoises (<i>Phocoena phocoena</i>) from the North Sea and Baltic Sea have sufficient time to reproduce in a human influenced environment? - Fig 1

<p>Mid-longitudinal section of a tooth from a neonate (A) and an adult (B) harbour porpoise (<i>Phocoena phocoena</i>).</p

Quartile age distribution of harbour porpoises from the German North Sea and Baltic Sea between 1996 and 2017.

<p>Quartile age distribution of harbour porpoises from the German North Sea and Baltic Sea between 1996 and 2017.</p

Percentile of all animals found between 1990 and 2017 that were older than the estimated threshold age of reaching sexual maturity of the population.

<p>Percentile of all animals found between 1990 and 2017 that were older than the estimated threshold age of reaching sexual maturity of the population.</p

Population structure of female harbour porpoises of the North Sea (green bars) and Baltic Sea (red bars).

<p>Proportion of animals indicates the proportion of animals relative to the total number of animals within a given age bracket. Round brackets indicate exclusive values, square brackets indicate inclusive values.</p