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Jonathan Havenhand


Jonathan Havenhand
+46 31 786 9682

Postal Address: Tjärnö, 45296 Strömstad
Visiting Address: Tjärnö , 45296 Strömstad

Department of Marine Sciences (More Information)
Box 461
405 30 Göteborg
Visiting Address: Carl Skottsbergs gata 22 B , 413 19 Göteborg

About Jonathan Havenhand

Jon Havenhand researches the evolutionary ecology of reproduction in marine invertebrates, focussing on intra-specific variation in fertilization and larval viability and the role of ocean acidification.


Description of research activities

Jon Havenhand’s research focuses on the evolution of early life-history characteristics in marine invertebrates. This ranges from investigations of gamete-compatibilties in broadcast-spawning species, to the selective benefits of different larval forms.


Fertilization and Larval Ecology of marine invertebrates
The majority of marine animals release their gametes freely into the water-column, where they fertilize, and develop. This process is neither simple nor risk-free: gametes can face many difficulties locating each other and fertilizing successfully. Gamete dilution can be a big problem, but sometimes eggs may also be exposed to too many sperm - leading to death of the embryo. Once gametes have encountered each other successfully, a variety of compatibility mechanisms may determine which individual’s sperm is most likely to bind, penetrate, and fertilize the egg. Not surprisingly, a variety of adaptations have evolved in response to these selective pressures, and much recent theory has focussed on this.

Fertilized embryos also face a number of challenges - not least because they’re usually unprotected and easy prey for many planktivorous predators. In some species embryos may develop rapdily without feeding into larvae that settle and metamorphose within hours of fertilization. In others, embryos develop as longer-term larvae that feed and grow in the plankton for many weeks before settling to the seabed and metamorphosing into a juvenile.

The great variety of larval forms in marine invertebrates was comprehensively classified only 60 years ago by Gunnar Thorson. Since that time the ecology and evolution of reproduction in marine invertebrates has been a focus of research, not least because the different energetic costs, survival probabilities, dispersal capacities and behaviours of these different larval forms have deep significance for population dynamics, gene-flow, and adaptation in marine species. Jon currently works with several closely related aspects of this area:

  • patterns, causes and consequences of variation in sperm:egg compatibility
  • effects of ocean acidification on early life-history stages of marine invertebrates - including the assessment of non-significant results
  • impacts of larval type on the energetics of adult populations

Jon is pursuing these research interests in collaboration with a number of Masters and PhD students as well as several leading international researchers.

Latest publications

Post-glacial establishment of locally adapted fish populations over a steep salinity gradient
Erica H Leder, Carl André, Alan Le Moan, Mats H. Töpel, Anders Blomberg et al.
Journal of Evolutionary Biology, Journal article 2020
Journal article

Ocean acidification as a multiple driver: how interactions between changing seawater carbonate parameters affect marine life
Catriona L. Hurd, John Beardall, Steeve Comeau, Christopher E. Cornwall, Jonathan N. Havenhand et al.
Marine and Freshwater Research, Journal article 2020
Journal article

Handbook to support the SCOR Best Practice Guide for ‘Multiple Drivers’ Marine Research
Philip Boyd, S. Collins, Samuel Dupont, K. Fabricius, J.-P. Gattuso et al.
University of Tasmania, Report 2019

Toxic Algae Silence Physiological Responses to Multiple Climate Drivers in a Tropical Marine Food Chain
Lucy M. Turner, Jonathan N. Havenhand, C. Alsterberg, A. D. Turner, S. K. Girisha et al.
Frontiers in Physiology, Journal article 2019
Journal article

Showing 51 - 60 of 81



Effect of ocean acidification on marine fish sperm (Baltic cod: Gadus morhua)
Andrea Frommel, V Stiebens, Catriona Clemmesen, Jonathan N. Havenhand
Biogeosiences, Journal article 2011
Journal article

The effectiveness of yoga for the improvement of well-being and resilience to stress in the workplace
N. Hartfiel, Jonathan N. Havenhand, S. B. Khalsa, G. Clarke, A. Krayer
Scandinavian Journal of Work Environment & Health, Journal article 2011
Journal article



Fertilization Strategies.
E. A. Serrao, Jonathan N. Havenhand
Hard bottom communities. Patterns, scales, dynamics, functions, shifts., Springer Verlag, Chapter in book 2009
Chapter in book

Reproduction and larvae / spore types.
Jonathan N. Havenhand, C. A. Styan
Biofouling. S. Dürr and J. C. Thomason. London., London, Blackwell, Chapter in book 2009
Chapter in book


Försurning i klimatförändringens spår
Jonathan N. Havenhand, Samuel Dupont, Michael C. Thorndyke
HAVET 2008, Stockholm, Naturvårdsverket, Chapter in book 2008
Chapter in book

Showing 51 - 60 of 81

Page Manager: Annika Wall|Last update: 7/1/2015

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