Fig 1.
Summary of New Zealand sea lion pup census and events at Sandy Bay, Enderby Island during the 2017–18 season.
Vertical dashed lines indicate the beginning and end of the monitored period. (A) Estimated cumulative pup count during daily colony monitoring until mid-January and then weekly census counts ongoing. Decreasing numbers of pups from mid-January are predominantly due to dispersal away from monitored areas. (B) Number of pup captures and deaths per day. Non-cohort captures include first and case-control captures.
Fig 2.
Summary of clinical signs observed in New Zealand sea lion pups at Enderby Island during the 2016–17 and 2017–18 field seasons.
(A) Outcome of pups observed with clinical signs during the monitored field season. (B) Number of days before death that clinical signs were first identified, if the pup was found dead.
Fig 3.
Line plots showing change in haematological parameters with standard length as a surrogate for age and ivermectin treatment group in New Zealand sea lion pups.
Grey shading indicates 95% confidence intervals. Haematological parameters include (A) packed cell volume, (B) total plasma protein, (C) reticulocytes, (D) total leukocyte count, (E) band neutrophils, (F) segmented neutrophils, (G) lymphocytes, (H) monocytes, (I) eosinophils.
Table 1.
Summary of linear mixed effects models for haematological parameters of New Zealand sea lion pups with covariates of standard length as a surrogate for age, sex and ivermectin treatment group, with individual pup identity as a random effect.
Sample size for ivermectin-treated (nT) and control (nC) pup samples are listed.