Table 1 Mean estimate and associated variance of the main life history traits of H. contortus

Definition

Proportion of ingested larvae that develop into immature or adult worms

Proportion of adult worms that die per day

Mean number of eggs laid in sheep faeces by an adult female per day

Mean number of eggs counted per gram of faeces

Mean estimate

\( \frac{WB}{ID} \)

\( \frac{- ln\left(\frac{WB}{ID}\right)}{t} \)

\( \frac{ F E{ C}_n\ast DFP}{WB\ast {F}_p} \)

FEC _n

Variance

\( \frac{SE{(WB)}^2}{I{ D}^2} \)

\( \frac{SE{(WB)}^2}{{\left( t\ast WB\right)}^2} \)

\( \frac{DF{ P}^2}{F_p^2}\ast \frac{ F E{C_n}^2}{W{ B}^2}\ast \left(\frac{SE{\left( FE{C}_n\right)}^2}{ F E{C_n}^2}+\frac{SE{(WB)}^2}{W{ B}^2}\right) \)

SE (FEC _n )