News

Climate change causing sharks to lose their bites

High Point Enterprise · last updated

Microscopic view of damaged shark tooth after incubation for eight weeks at 7.3pH. (Steffen Köhler via SWNS)

Sharks may be losing their deadly bite due to climate change, according to a new study.

Javascript is required for you to be able to read premium content. Please enable it in your browser settings.

kAm%96 2A6I AC652E@CDV C2K@C\D92CA E66E9 2C6 36:?8 56DEC@J65 3J @462? 24:5:7:42E:@?[ D2J D4:6?E:DED]k^Am

kAm#6D62C496CD 92G6 5:D4@G6C65 E92E 2D D62D 364@>6 >@C6 24:5:4[ k2 9C67lQ9EEADi^^E2=<6C]?6HD^a_ad^_d^ah^D92C<D\C2C6=J\D66?\E@86E96C\42F89E\@?\42>6C2\D92C:?8\>62=^QmD92C<Dk^2m’ E66E9 >2J 364@>6 DECF4EFC2==J H62<6C 2?5 >@C6 AC@?6 E@ 3C62<:?8]k^Am

kAmxE H2D 2=C625J <?@H? E92E k2 9C67lQ9EEADi^^E2=<6C]?6HD^a_ad^_b^a`^D4:6?E:DED\C6G62=\H9J\D@>6\D92C<D\2C6\9@>63@5:6D^Q E2C86ElQ03=2?<Q C6=lQ?@C676CC6C ?@@A6?6CQmD92C<Dk^2m 42? 72>@FD=J C6A=246 E96:C E66E9[ H:E9 ?6H @?6D 2=H2JD 8C@H:?8 2D E96J’C6 FD:?8 FA E96 4FCC6?E D6E]k^Am

kAm%96:C E66E9 2C6 <6J E@ E96:C DFCG:G2= 2D E96J C6=J @? E96> E@ 42E49 AC6J]k^Am

kAmqFE C6D62C496CD D2J E9@D6 762C65 E66E9 2C6 3F:=E 7@C 4FEE:?8 7=6D9[ ?@E C6D:DE:?8 24:5:EJ]k^Am

kAmp?5 E96 23:=:EJ E@ C68C@H E96:C E66E9 >:89E ?@E 36 6?@F89 E@ 6?DFC6 k2 9C67lQ9EEADi^^E2=<6C]?6HD^a_ad^_b^`_^>682=@5@?D\D92A6\H2D\>@C6\=:<6\H92=6D\E92?\D92C<D\DEF5J^Q E2C86ElQ03=2?<Q C6=lQ?@C676CC6C ?@@A6?6CQmD92C<Dk^2m 42? H:E9DE2?5 E96 AC6DDFC6D @7 2 H2C>:?8 H@C=5 H96C6 @462?D 2C6 86EE:?8 >@C6 24:5:4[ 244@C5:?8 E@ E96 ?6H DEF5J AF3=:D965 :? E96 ;@FC?2= k2 9C67lQ9EEADi^^HHH]7C@?E:6CD:?]@C8^;@FC?2=D^>2C:?6\D4:6?46Q E2C86ElQ03=2?<Q C6=lQ?@C676CC6C ?@@A6?6CQmuC@?E:6CD :? |2C:?6 $4:6?46k^2m]k^Am

kAm#6D62C496CD :? v6C>2?J 6I2>:?65 k2 9C67lQ9EEADi^^E2=<6C]?6HD^a_ac^`_^_f^4=:>2E6\492?86\42FD:?8\H92=6\D92C<D\E@\8@\E@\52?86C@FD\D9:AA:?8\K@?6D^Q E2C86ElQ03=2?<Q C6=lQ?@C676CC6C ?@@A6?6CQmD92C<Dk^2m’ E66E9 F?56C 5:776C6?E @462? 24:5:7:42E:@? D46?2C:@D 2?5 D9@H65 E92E >@C6 24:5:4 @462?D =625 E@ >@C6 3C:EE=6 2?5 H62<6C E66E9]k^Am

kAm$EF5J 7:CDE 2FE9@C |2I:>:=:2? q2F>[ 2 3:@=@8:DE 2E k2 9C67lQ9EEADi^^HHH]99F]56^6?^Q E2C86ElQ03=2?<Q C6=lQ?@C676CC6C ?@@A6?6CQmw6:?C:49 w6:?6 &?:G6CD:EJk^2m Www&X[ D2:5i “$92C< E66E9[ 56DA:E6 36:?8 4@>A@D65 @7 9:89=J >:?6C2=:D65 A9@DA92E6D[ 2C6 DE:== GF=?6C23=6 E@ 4@CC@D:@? F?56C 7FEFC6 @462? 24:5:7:42E:@? D46?2C:@D]k^Am

Blacktip Reef Shark at Sealife Oberhausen, where the teeth used in the study were collected. (Max Baum via SWNS)

By Talker

kAm“%96J 2C6 9:89 56G6=@A65 H62A@?D 3F:=E 7@C 4FEE:?8 7=6D9[ ?@E C6D:DE:?8 @462? 24:5]k^Am

kAmQ~FC C6DF=ED D9@H ;FDE 9@H GF=?6C23=6 6G6? ?2EFC6’D D92CA6DE H62A@?D 42? 36]”k^Am

kAmw6 6IA=2:?65 E92E @462? 24:5:7:42E:@? :D 2 AC@46DD 5FC:?8 H9:49 E96 @462?’D Aw G2=F6 <66AD 564C62D:?8[ C6DF=E:?8 :? >@C6 24:5:4 H2E6C] xE :D >@DE=J 5C:G6? 3J E96 C6=62D6 @7 9F>2?\86?6C2E65 42C3@? 5:@I:56]k^Am

kAmrFCC6?E=J[ E96 2G6C286 Aw @7 E96 H@C=5’D @462?D :D g]`] x? ab__[ :E :D 6IA64E65 E@ 5C@A E@ f]b[ >2<:?8 :E 2=>@DE `_ E:>6D >@C6 24:5:4 E92? :E 4FCC6?E=J :D]k^Am

kAmu@C E96 ?6H DEF5J[ C6D62C496CD FD65 E96D6 EH@ Aw G2=F6D E@ 6I2>:?6 E96 67764ED @7 >@C6 2?5 =6DD 24:5:4 H2E6C @? E96 E66E9 @7 q=24<E:A C667 k2 9C67lQ9EEADi^^E2=<6C]?6HD^a_ad^_a^af^?6H\DEF5J\C6G62=D\D92C<D\7@==@H\D62D@?2=\A2EE6C?D^Q E2C86ElQ03=2?<Q C6=lQ?@C676CC6C ?@@A6?6CQmD92C<Dk^2m]k^Am

kAms:G6CD 4@==64E65 >@C6 E92? e__ 5:D42C565 E66E9 7C@> 2? 2BF2C:F> 9@FD:?8 E96 k2 9C67lQ9EEADi^^E2=<6C]?6HD^a_ad^_a^ad^D92C<D\2?5\4:4252D\:?DA:C6\?6H\F=EC2\4=62?\2?E:324E6C:2=\DFC7246D^Q E2C86ElQ03=2?<Q C6=lQ?@C676CC6C ?@@A6?6CQmD92C<Dk^2m]k^Am

kAmp E@E2= @7 `e E66E9 – E9@D6 E92E H6C6 4@>A=6E6=J :?E24E 2?5 F?52>2865 – H6C6 FD65 7@C E96 Aw 6IA6C:>6?E[ H9:=6 be >@C6 E66E9 H6C6 FD65 E@ >62DFC6 367@C6 2?5 27E6C]k^Am

kAm%96 E66E9 H6C6 :?4F32E65 7@C 6:89E H66<D :? D6A2C2E6 a_\=:E6C E2?<D]k^Am

kAmr@>A2C65 E@ E96 E66E9 :?4F32E65 2E g]` Aw[ E96 E66E9 6IA@D65 E@ >@C6 24:5:4 H2E6C H6C6 D:8?:7:42?E=J >@C6 52>2865]k^Am

kAm$EF5J D6?:@C 2FE9@C !C@76DD@C $632DE:2? uC2F?6[ 2=D@ @7 ww&[ D2:5i “(6 @3D6CG65 G:D:3=6 DFC7246 52>286 DF49 2D 4C24<D 2?5 9@=6D[ :?4C62D65 C@@E 4@CC@D:@?[ 2?5 DECF4EFC2= 568C252E:@?]Qk^Am

kAmw6 6IA=2:?65 E92E E@@E9 4:C4F>76C6?46 H2D 2=D@ 8C62E6C 2E 9:896C Aw =6G6=D]k^Am

Blacktip Reef Shark at Sealife Oberhausen, where the teeth used in the study were collected. (Max Baum via SWNS)

By Talker

kAm%66E9[ 9@H6G6C[ 5:5 ?@E 24EF2==J 8C@H[ 3FE E96 DFC7246 DECF4EFC6 3642>6 >@C6 :CC68F=2C[ C6DF=E:?8 :? :E 2AA62C:?8 =2C86C @? as :>286D]k^Am

kAm(9:=6 2? 2=E6C65 E@@E9 DFC7246 >2J :>AC@G6 4FEE:?8 677:4:6?4J[ uC2F?6 D2JD :E A@E6?E:2==J 2=D@ >2<6D E66E9 DECF4EFC2==J H62<6C 2?5 >@C6 AC@?6 E@ 3C62<:?8]k^Am

kAm%96 DEF5J @?=J =@@<65 2E 5:D42C565 E66E9 @7 ?@?\=:G:?8 >:?6C2=:D65 E:DDF6[ H9:49 >62?D C6A2:C AC@46DD6D E92E >2J 92AA6? :? =:G:?8 @C82?:D>D 4@F=5 ?@E 36 4@?D:56C65]k^Am

kAmuC2F?6 D2:5[ “x? =:G:?8 k2 9C67lQ9EEADi^^E2=<6C]?6HD^a_ad^_`^ag^D92C<\688\92E496D\56DA:E6\?@\>2=6\D92C<D\36:?8\AC6D6?E\:?\E2?<^QmD92C<Dk^2m[ E96 D:EF2E:@? >2J 36 >@C6 4@>A=6I]k^Am

kAmQ%96J 4@F=5 A@E6?E:2==J C6>:?6C2=:K6 @C C6A=246 52>2865 E66E9 72DE6C[ 3FE E96 6?6C8J 4@DED @7 E9:D H@F=5 36 AC@323=J 9:896C :? 24:5:7:65 H2E6CD]Qk^Am

kAmw6 D2JD 3=24<E:A C667 k2 9C67lQ9EEADi^^E2=<6C]?6HD^a_ac^`a^_c^3:C5D\6J6\G:6H\@7\D92C<D\H:?D\AC6DE:8:@FD\A9@E@\4@>A6E:E:@?^Q E2C86ElQ03=2?<Q C6=lQ?@C676CC6C ?@@A6?6CQmD92C<Dk^2m >FDE DH:> H:E9 E96:C >@FE9D A6C>2?6?E=J @A6? E@ 36 23=6 E@ 3C62E96[ D@ E96:C E66E9 2C6 4@?DE2?E=J 6IA@D65 E@ H2E6C]k^Am

kAmx7 E96 H2E6C :D E@@ 24:5:4[ E96 E66E9 2FE@>2E:42==J E2<6 52>286[ 6DA64:2==J :7 24:5:7:42E:@? :?E6?D:7:6D]k^Am

(Photo by Graham Henderson via Pexels)

By Talker

kAmq2F> D2:5i “tG6? >@56C2E6 5C@AD :? Aw 4@F=5 27764E >@C6 D6?D:E:G6 DA64:6D H:E9 D=@H E@@E9 C6A=:42E:@? 4:C4=6D @C 92G6 4F>F=2E:G6 :>A24ED @G6C E:>6]k^Am

kAm“|2:?E2:?:?8 @462? Aw ?62C E96 4FCC6?E 2G6C286 @7 g]` 4@F=5 36 4C:E:42= 7@C E96 A9JD:42= :?E68C:EJ @7 AC652E@CD’ E@@=D]”k^Am

kAm%96 DEF5J @?=J 7@4FD65 @? E96 496>:42= 67764ED @7 @462? 24:5:7:42E:@? @? ?@?\=:G:?8 E:DDF6]k^Am

kAm%96 C6D62C496CD D2J 7FEFC6 DEF5:6D D9@F=5 6I2>:?6 492?86D E@ E66E9[ E96:C 496>:42= DECF4EFC6[ 2?5 >6492?:42= C6D:=:6?46 :? =:G6 k2 9C67lQ9EEADi^^E2=<6C]?6HD^a_ac^`a^_a^<:==6C\H92=6D\:?G6?E\F?:BF6\H2JD\E@\9F?E\8:2?E\H92=6\D92C<D^Q E2C86ElQ03=2?<Q C6=lQ?@C676CC6C ?@@A6?6CQmD92C<Dk^2m]k^Am

kAmqFE E96 DEF5J D9@HD E92E >:4C@D4@A:4 52>286 >:89E 36 6?@F89 E@ A@D6 2 D6C:@FD AC@3=6> 7@C 2?:>2=D 56A6?5:?8 @? E96:C E66E9 7@C DFCG:G2=]k^Am

kAmq2F> D2:5i “xE’D 2 C6>:?56C E92E 4=:>2E6 492?86 :>A24ED 42D4256 E9C@F89 6?E:C6 7@@5 H63D 2?5 64@DJDE6>D]Qk^Am

kAmuC2F?6 25565[ “%9:D DEF5J 3682? 2D 2 32496=@C’D AC@;64E 2?5 8C6H :?E@ 2 A66C\C6G:6H65 AF3=:42E:@?]k^Am

kAmQxE’D 2 8C62E 6I2>A=6 @7 E96 A@E6?E:2= @7 DEF56?E C6D62C49]k^Am

kAm“rFC:@D:EJ 2?5 :?:E:2E:G6 42? DA2C< C62= D4:6?E:7:4 5:D4@G6CJ]”k^Am