Jan Häge

ORCID: 0000-0003-2371-1641
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About
Contact & Profiles
Research Areas
  • Marine animal studies overview
  • Ichthyology and Marine Biology
  • Underwater Vehicles and Communication Systems
  • Cephalopods and Marine Biology
  • Paleontology and Evolutionary Biology
  • Fish Ecology and Management Studies
  • Marine and fisheries research

University of Helsinki
2023

Humboldt-Universität zu Berlin
2022-2023

The open ocean offers a suite of ecological conditions promoting the occurrence multi-species predator aggregations. These mixed aggregations typically hunt large groups relatively small and highly cohesive prey. However, mechanisms functions these are largely unknown. Even basic knowledge whether species' interactions mutualistic, commensal or parasitic is missing. Moreover, recordings attack capture rates marine aggregations, which critical in understanding how why have evolved, almost...

10.1098/rstb.2022.0103 article EN Philosophical Transactions of the Royal Society B Biological Sciences 2023-04-17

Billfish rostra potentially have several functions; however, their role in feeding is unequivocal some species. Recent work linked morphological variation rostral micro-teeth to differences behavior two billfish species, the striped marlin (Kajikia audax) and sailfish (Istiophorus platypterus). Here, we present micro-tooth morphology for a third blue (Makaira nigricans), which use of rostrum still undocumented from systematic observations wild. We measured on tips marlin, using...

10.1111/jfb.15608 article EN cc-by-nc Journal of Fish Biology 2023-11-22

Recent comparative studies of billfishes (Istiophoridae and Xiphiidae) have provided evidence differences in the form function rostra (bill) among species. Here, we report discovery a new structure, lacuna rostralis, on sailfish Istiophorus platypterus, which is absent swordfish Xiphias gladius, striped marlin Kajikia audax blue Makaira nigricans. The lacunae rostralis are small cavities that contain teeth. They were found ventral rostrum surface all I. platypterus specimens examined...

10.1111/jfb.15018 article EN cc-by-nc-nd Journal of Fish Biology 2022-02-23
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