A total of 25 30 tadpoles per sperm competition trial (mean per trial ± SE, 25.4±0.84) were collected for the assignment of paternity.
A further 25 embryos were then collected from each sperm competition trial at 96 hours and 144 hours post fertilization.
Pika was recently entered in his first nosework competition trial and he qualified in four Novice elements (he needs 15 to go from Novice to Advanced).
Comparisons between group fear tests and social tests showed that pigs which readily approach a human tended to have higher lesion scores and fewer feeding bouts in the feed competition trial.
From each sperm competition trial we sampled 25 embryos at 48 hours post fertilization.
The three replicates from each sperm competition trial were randomly assigned to one of three sampling periods, 48 hours (stage 14 15) 96 hours (stage 18 19) and 144 hours (stage 22 23, hatching) post fertilization [20].
A total of 16 sperm competition trials were carried out using ejaculates from two randomly chosen males with a randomly chosen female.
Given the large number of species used in this study, along with the substantial time required to visualize and enumerate root growth (below), it was not feasible to conduct a fully pairwise set of competition trials including all species combinations.
To find the players that will make up the England squad for that competition, trials are being held at eight locations across the country.
Thus, we assume that our competition trials give meaningful fitness estimates.
For the remaining two time intervals, 10 of the 16 sperm competition trials remained highly skewed.
