article_snippet.sent: Lead author of the study, Dr Kubicki said: Its advertisement call is quite unique…Its’s different than any other species that has been discovered.
article_snippet.sent: ‘advertisement call’ consists of ‘a single tonal long metallic whistle-like note with a duration of 0.40–0.55 s... and a dominant frequency of 3.35–3.44 kHz’.
article_snippet.sent: Experts from the University of Hertfordshire observed guppy fish at London Zoo.
article_snippet.sent: When guppy fish were given a peptide, or short protein, guppy fish produced four times as many offspring in six months as fish that had not nothing placed in guppy fish tanks.