3 Works

Data from: Spawning behaviour of Arctic charr (Salvelinus alpinus): spawning synchrony, vibrational communication and mate guarding

Magnus B. Brattli, Torvald B. Egeland, Jarle T. Nordeide & Ivar Folstad
A mismatch between male and female gamete release in external fertilizers can result in reduced or failed fertilization, sperm competition and reduced paternity. Here, spawning behaviour of free-living Arctic charr (Salvelinus alpinus) was video recorded, and their reproductive behaviour was analysed. From evaluating 157 spawning events we observed that females mainly spawned with a guarding male and the female and the guarding male synchronized timing of gamete releaseunder sperm competition. Although sneakers spawned with higher...

Data from: Phylogeographic diversification and postglacial range dynamics shed light on the conservation of the kelp Saccharina japonica

Jie Zhang, Jianting Yao, Zi-Min Hu, Alexander Jueterbock, Norishige Yotsukura, Tatiana N. Krupnova, Chikako Nagasato & Delin Duan
Studies of postglacial range shifts could enhance our understanding of seaweed species’ responses to climate change, and hence facilitate the conservation of natural resources. However, the distribution dynamics and phylogeographic diversification of the commercially and ecologically important kelp Saccharina japonica in the Northwest Pacific (NWP) are still poorly surveyed. In this study, we analyzed the evolutionary history of S. japonica using two mitochondrial markers and 24 nuclear microsatellites. A STRUCTURE analysis revealed two partially isolated...

Data from: No support for cryptic choice by ovarian fluid in an external fertilizer

Snøfrid April Kleppe, Jarle T. Nordeide, Geir Rudolfsen, Lars Figenschou, Berner Larsen, Katrin Reiss & Ivar Folstad
Whether the ovarian fluid represents a selective environment influencing cryptic female choice was tested using an external fertilizer experiencing intense sperm competition and large effects of ovarian fluid on sperm swimming behaviour - the Arctic charr (Salvelinus alpinus). We physically separated the ovarian fluid from the eggs of reproductively active females and reintroduced either their own ovarian fluid or fluid from another female to the eggs. The eggs were then fertilized in vitro in a...

Registration Year

  • 2018

Resource Types

  • Dataset


  • Nord University
  • The Arctic University of Norway
  • Qingdao National Laboratory for Marine Science and Technology
  • Hokkaido University
  • Chinese Academy of Sciences
  • Institute of Oceanology