Effects of elevated temperature on the performance and survival of pacific crown-of-thorns starfish (Acanthaster cf. Solaris)

Lang Bethan J.; Donelson Jennifer M.; Caballes Ciemon F.Uthicke SvenDoll Peter C.Pratchett Morgan S.

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Effects of elevated temperature on the performance and survival of pacific crown-of-thorns starfish (Acanthaster cf. Solaris)

机译：Effects of elevated temperature on the performance and survival of pacific crown-of-thorns starfish (Acanthaster cf. Solaris)

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Population irruptions of Pacific crown-of-thorns starfish (Acanthaster cf. solaris) have caused substantial damage to coral reefs, but it is largely unknown how this asteroid will fare in a warmer ocean. We exposed these starfish to one of four thermal treatments, with final temperatures of 26 degrees C (control, annual average), 28 degrees C (summer average), 30 degrees C (summer maximum) and 32 degrees C (predicted summer maximum by 2100). We measured the righting time, movement rate, standard metabolic rate and probability of survival of the crown-of-thorns starfish at various timepoints over similar to 60 days. We found that while temperature did not affect righting time, it did significantly affect movement rate. The movement rate of starfish increased across the 26 to 30 degrees C range, with those at 28 degrees C and 30 degrees C moving 18 and 27% faster than those at the control temperature. Similarly, the standard metabolic rate of starfish increased from 26 to 30 degrees C, with metabolism 100% and 260% faster at 28 degrees C and 30 degrees C compared to those at the 26 degrees C control. At 32 degrees C, individual starfish exhibited a 14% slower movement rate, a 33% slower metabolic rate, and also exhibited a fourfold lower probability of survival than those at 30 degrees C. These results indicate that 32 degrees C is above the thermal optimum of crown-of-thorns starfish, suggesting that prolonged exposure to temperatures that are expected to be regularly exceeded under near-future climate change may be detrimental to this species.

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《Marine Biology: International Journal on Life in Oceans and Coastal Waters》 |2022年第4期|43.1-43.13|共13页
作者
Lang Bethan J.; Donelson Jennifer M.; Caballes Ciemon F.Uthicke SvenDoll Peter C.Pratchett Morgan S.;
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作者单位

James Cook Univ, Australian Res Council, Ctr Excellence Coral Reef Studies, Townsville, Qld 4811, Australia;

Australian Inst Marine Sci, PMB 3, Townsville, Qld 4810, Australia;

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正文语种英语
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Climate change; Coral reefs; Behaviour; Movement; Metabolic rate; Mortality;

Effects of elevated temperature on the performance and survival of pacific crown-of-thorns starfish (Acanthaster cf. Solaris)

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