Individuazione di una formula euristica per determinare il periodo riproduttivo della Lampreda di mare nel bacino del Magra-Vara (SP).

Al fine di ottimizzare l\u2019applicazione di idonee misure di conservazione nei confronti della popolazione di lampreda di mare (Petromyzon marinus) del bacino del Magra-Vara, si \ue8 resa necessaria l\u2019elaborazione di un\u2019apposita formula euristica capace di determinare il periodo di inizio e fine dei fenomeni riproduttivi della specie

Miglioramento della funzionalit\ue0 fluviale: risultati del Progetto Life+ P.A.R.C

La realizzazione di passaggi per pesci lungo il fiume Vara-Magra nell'ambito del progetto Life P.A.R.C. ha favorito il successo riproduttivo della Lampreda di mare Petromyzon marinus e la risalita della Cheppia Alosa fallax verso siti riproduttivi non pi\uf9 raggiunti9 da quando la continuit\ue0 longitudinale del fiume era stata interrotta dalla costruzione di sbarramenti trasversali

Faunal activity rhythms influencing early community succession of an implanted whale carcass offshore Sagami Bay, Japan

15 pages, 7 figures, 2 tables, supplementary material https://doi.org/10.1038/s41598-018-29431-5Benthic community succession patterns at whale falls have been previously established by means of punctual submersible and ROV observations. The contribution of faunal activity rhythms in response to internal tides and photoperiod cues to that community succession dynamism has never been evaluated. Here, we present results from a high-frequency monitoring experiment of an implanted sperm whale carcass in the continental slope (500 m depth) offshore Sagami Bay, Japan. The benthic community succession was monitored at a high frequency in a prolonged fashion (i.e. 2-h intervals for 2.5 months) with a seafloor lander equipped with a time-lapse video camera and an acoustic Doppler profiler to concomitantly study current flow dynamics. We reported here for the first time, to the best of our knowledge, the occurrence of strong 24-h day-night driven behavioral rhythms of the most abundant species (Simenchelys parasitica; Macrocheira kaempferi, and Pterothrissus gissu). Those rhythms were detected in detriment of tidally-controlled ones. Evidence of a diel temporal niche portioning between scavengers and predators avoiding co-occurrence at the carcass, is also provided. The high-frequency photographic and oceanographic data acquisition also helped to precisely discriminate the transition timing between the successional stages previously described for whale falls’ attendant communitiesPeer Reviewe

Faunal activity rhythms influencing early community succession of an implanted whale carcass offshore Sagami Bay, Japan

http://www.godac.jamstec.go.jp/darwin/cruise/natsushima/nt12-15/ehttp://www.godac.jamstec.go.jp/darwin/cruise/natsushima/nt12-22/