Wendell O. Challenger

LGL Limited

Baseline data for rockfish abundance and substrate associations were documented for newly established rockfish conservation areas (RCAs) in Howe Sound using a multilevel occupancy model, which is new to fisheries science. In 2005, a series of roaming video dives was conducted. Videotapes were scored, minute by minute, according to substrate type, r...

Wildlife managers and ecologists are often interested in estimating abundance of animals belonging to a certain fixed group (e.g. sex), but in some cases group membership cannot always be ascertained. Group assignment uncertainties can occur either through the inability to assign group membership because of a lack of group-specific characteristics...

Anaemia has been reported in wild animals, typically associated with traumatic events or ill health. However, female birds routinely become ‘anaemic’ during egg‐laying; we sought to determine the causes of this reduction in haematocrit. Haematocrit in female European Starlings ( Sturnus vulgaris Linnaeus) decreased between pre‐breeding and egg‐layi...

We investigated the quantitative matching of plasma yolk precursor supply (the plasma pool) to follicle demand during yolk formation in European starlings (Sturnus vulgaris). Plasma concentrations of the two yolk precursors, vitellogenin (VTG) and very low density lipoprotein (VLDL), were only elevated coincident with rapid yolk development (RYD) a...