Sentence examples for copulation was observed from inspiring English sources

Each individual mating pair was observed for a period of 90 minutes until copulation was observed.

Likewise, all females gave the receptivity signal and successful copulation was observed in all 20 couples tested.

Twenty successful copulations were observed among these 30 pairs, and each copulation was from a different pair.

Copulations were observed and the used pedipalp was documented.

Copulations were observed and the use of the two pedipalps was documented.

All copulations were observed by eye and videotaped and their durations were recorded.

In couples consisting of females that had developed in drugstore beetles and males from granary weevils significantly less receptivity signals and copulations were observed.

In a clean aquarium more copulations were observed than in an uncleaned aquarium (χ2 = 3.88, df = 1, p = 0.049), indicating that the presence of mucus is important for this effect.

The following morning, within 2 hr of incubator "dawn," a single virgin male was aspirated into each vial containing a female assigned to the "mated" treatment and individual copulations were observed.

Embryonic stages were determined according to the copulation plug date (E0.5 was counted as the first day a copulation plug was observed).

The morning that the copulation plug was observed was considered 0.5 days post coitum (dpc).