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Table 1 Production of L. salmonis families from different experimental groups

From: A common-garden experiment to quantify evolutionary processes in copepods: the case of emamectin benzoate resistance in the parasitic sea louse Lepeophtheirus salmonis

Group Couples Egg strings No hatching Hatchlings excluded No male Families produced
Resistant 6 5* 1 2 0 2
Sensitive 6 5** 1 2 1 1
Hybr (SxR) 6 5 0 1 0 4
Hybr (RxS) 6 5 0 1 1 3
Unknown 12 12 3 2 0 7
Total 36 32 5 8 2 17
  1. Group = experimental group, defined by the strain(s) of the mother and the father, where Resistant = both parents resistant, Sensitive = both parents sensitive, Hybr = hybrids (SxR: sensitive father and resistant mother; RxS: resistant father and sensitive mother) and Unknown = both parents unknown. Couples = initial number of L. salmonis couples from each group; maximum number of potential families. Egg strings = number of egg string pairs incubated from each group, differ from ‘couples’ if the female was lost during the experiment or did not carry egg strings. No hatching = number of egg string pairs that did not hatch within 11 days in incubation. Hatchlings excluded = number of groups of hatchlings containing few, or inactive, copepodids (rejected from further use in the experiment). No male = number of families excluded due to loss of the male in the single-tank. Families produced = number of families meeting the requirements for further use in the experiment. Single egg strings were also collected and incubated. *: one female carried only one single egg string. **: two females carried only one single egg strain each.