Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Accurate timing of migration prolongs life expectancy in pike

01.10.2015

Animal migration is a spectacular phenomenon that has fascinated humans for long. It is widely assumed that appropriate timing of migratory events is crucial for survival, but the causes and consequences of individual variation in timing are poorly understood. New research based on migrating pike in the Baltic Sea and published in the British Ecological Society’s Journal of Animal Ecology reveals how behaviours such as punctuality, flexibility and fine-tuning influence life expectancy in fish.

Pike is a widely distributed, long-lived and large keystone predatory fish species that breeds annually after becoming mature. In the Baltic Sea, some pike display homing behaviour and repeatedly migrate to spawn in the same stream where they were born. Migrating pike in the Baltic Sea thus offers interesting and rare opportunities to gain further understanding of the causes and consequences of variation in migratory timing among and within individuals.


Two northern pike (Esox lucius) returning to spawn in the stream where they were born. They will soon emigrate back to the Baltic Sea, where individuals originating from different streams coexist.

Photo © Olof Engstedt

Tibblin and collaborators from Linnaeus University (Kalmar, Sweden) studied arrival timing across six years of more than 2000 marked pike that migrated to a small spawning stream that flowed into the southwest of the Baltic Sea.

Lead-author Dr Petter Tibblin elaborates: “results show that individual migratory timing is consistent across years and that arriving too early or too late increases mortality. Individuals also continuously fine-tune their timing with increased experience, a behaviour that is similar to the trial-and-error method used by many mammals but previously not shown for fish”.

Results also shed some new light on the long-standing and intriguing issue of whether flexibility is adaptive such that it increases fitness, a topic that recently has received increased scientific attention although it has rarely been investigated empirically.

Study co-author professor Anders Forsman says: “we demonstrate that there is variation among individuals in the degree of flexibility (adjustments in migratory timing across years) and further establish that greater flexibility at early reproductive events improves life expectancy”

This research emphasizes the complex nature of animal behaviour, and advances our understanding of migratory behaviour. Co-author professor Per Larsson concludes: “that among individual variation and within-individual flexibility in migratory timing are associated with fitness suggest that these behaviours may also influence the viability of populations in the face of a rapidly changing world, and this should be considered in management programs”.

Petter Tibblin, Anders Forsman, and Per Larsson are members of the Linnaeus University Centre for Ecology and Evolution in Microbial model Systems, EEMiS. http://lnu.se/lnuc/eemis

Anders Forsmans personal webpage: http://lnu.se/personal/anders.forsman

Read the article:
Tibblin, P., Forsman, A., Borger, T. and Larsson, P. 2015. Causes and consequences of repeatability, flexibility and individual fine-tuning of migratory timing in pike. Journal of Animal Ecology, DOI: 10.1111/1365-2656.12439

Contact information:
Petter Tibblin, PhD, e-mail: Petter.Tibblin@LNU.se; phone: +46-(0)480-44 67 45; cellular phone: +46-(0)705-52 99 37

Anders Forsman, professor, e-mail: Anders.Forsman@LNU.se; phone: +46-(0)480-44 61 73; cellular phone: +46-(0)706-27 27 38

Per Larsson, professor, e-mail: Per.Larsson@lnu.se; phone: +46-(0)480-44 73 11
Pressofficer, Jonas Tenje+46 (0) 70 308 40 75

Pressofficer: Christina Dahlgren, +46-705 72 26 56, christina.dahlgren@lnu.se

Weitere Informationen:

http://onlinelibrary.wiley.com/doi/10.1111/1365-2656.12439/abstract Link to the article

Christina Dahlgren | idw - Informationsdienst Wissenschaft

Further reports about: Ecology cellular phone timing of migration

More articles from Life Sciences:

nachricht Researchers identify potentially druggable mutant p53 proteins that promote cancer growth
09.12.2016 | Cold Spring Harbor Laboratory

nachricht Plant-based substance boosts eyelash growth
09.12.2016 | Fraunhofer-Institut für Angewandte Polymerforschung IAP

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Electron highway inside crystal

Physicists of the University of Würzburg have made an astonishing discovery in a specific type of topological insulators. The effect is due to the structure of the materials used. The researchers have now published their work in the journal Science.

Topological insulators are currently the hot topic in physics according to the newspaper Neue Zürcher Zeitung. Only a few weeks ago, their importance was...

Im Focus: Significantly more productivity in USP lasers

In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.

Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...

Im Focus: Shape matters when light meets atom

Mapping the interaction of a single atom with a single photon may inform design of quantum devices

Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...

Im Focus: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

Researchers identify potentially druggable mutant p53 proteins that promote cancer growth

09.12.2016 | Life Sciences

Scientists produce a new roadmap for guiding development & conservation in the Amazon

09.12.2016 | Ecology, The Environment and Conservation

Satellites, airport visibility readings shed light on troops' exposure to air pollution

09.12.2016 | Health and Medicine

VideoLinks
B2B-VideoLinks
More VideoLinks >>>