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Some like it hot: the effect of temperature on brood development in the invasive crab Hemigrapsus takanoi (Decapoda: Brachyura: Varunidae)
van den Brink, A.; Godschalk, M.; Smaal, A.C.; Lindeboom, H.; McLay, C.L. (2013). Some like it hot: the effect of temperature on brood development in the invasive crab Hemigrapsus takanoi (Decapoda: Brachyura: Varunidae). J. Mar. Biol. Ass. U.K. 93(1): 189-196.
In: Journal of the Marine Biological Association of the United Kingdom. Cambridge University Press/Marine Biological Association of the United Kingdom: Cambridge. ISSN 0025-3154; e-ISSN 1469-7769, more
Peer reviewed article  

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    Environmental effects > Temperature effects
    Properties > Biological properties > Fecundity
    Hemigrapsus takanoi Asakura & Watanabe, 2005 [WoRMS]
Author keywords
    Incubation duration; Egg development; Brood stage; Net reproductive rate; Invasive crab

Authors  Top 
  • van den Brink, A., more
  • Godschalk, M.
  • Smaal, A.C.
  • Lindeboom, H., more
  • McLay, C.L.

    The duration of brood development in the introduced crab, Hemigrapsus takanoi in the Oosterschelde, The Netherlands, was compared at three different water temperatures. At 12, 18 and 24°C the females took an average of 32, 11 and 8 days respectively to lay eggs, which took 86, 28 and 18 days respectively to complete development. Five stages of development were identified, with each brood stage comprising a similar proportion of the duration time at different temperatures. The duration of each brood stage was also somewhat proportional to the number of females found carrying each brood stage in the field at the beginning of the breeding season. There appears to be a trigger for the breeding season in H. takanoi in the field at around 15°C above which ovary development begins. The results suggest that an increase in water temperature as a result of climate change may result in an increased net reproductive rate in H. takanoi due to earlier onset of the breeding season and increased number of broods per inter-moult period resulting in population growth. Increased temperatures may therefore lead to increased invasiveness of H. takanoi where it is already present, and range extension into locations where its establishment is currently excluded by unsuitable temperature.

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