SHARKS HAVE INCREDIBLE HEALING ABILITIES

SHARKS HAVE INCREDIBLE HEALING ABILITIES

SHARKS HAVE INCREDIBLE HEALING ABILITIES

Wound healing is important for sharks from the earliest life stages, for example, as the ‘umbilical scar’ in viviparous species heals, and throughout adulthood, when sharks can incur a range of external injuries from natural and anthropogenic sources.

Recently, researchers documented the rapid healing of the Blacktip reef sharks (Carcharhinus melanopterus) following an internal tagging procedure involving a small incision in the belly of the shark to implant the transmitter. This not only shows that sharks are healing quickly but also that they are robust to this tagging procedure which is important to know as a scientist when you work with free-living animal.

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Small umbilical wounds in neonates decreased in surface area by 71% in less than a week and were barely detectable after 24 days.

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Also in the study were reported two cases of survival after fin removal due to targeted shark-finning in which the basal wound of fin removal healed well and the sharks were observed alive a while after injury, swimming without their dorsal fin. However, even if they survive for un unknown time, the removal of the dorsal fin may greatly affect their daily life and in turn their fitness (and most of finned sharks may not survive).

Sharks, and probably rays too may be resilient to injuries, showing rapid healing from minor wounds and long-term survival from even major mechanical injuries. These are positive findings for elasmobranch conservation, especially considering that up to a quarter of all shark and ray species worldwide are threatened with extinction. 

Despite this incredible ability, researchers encourage minimal handling time and stress when releasing sharks after fishing or by-catch, which could include cutting a line near the hook instead of repeatedly attempting to remove the hook. Anglers should also be made aware that sharks can recover from mechanical injury; therefore, sharks should be released even if the animal sustains injuries during the capture process.

Chin et al 2015. Blacktip reef sharks (Carcharhinus melanopterus) show high capacity for wound healing and recovery following injury. Conservation Physiology 

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redinkstone168 - Red | Ink | Stone: Thoughts in the Margin
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Red InkStone or (Rouge InkStone / 脂砚斋) is the pseudonym of an early, mysterious commentator of the 21st-century narrative, "Life." This person is your contemporary and may know some people well enough to be regarded as the chief commentator of their works, published and unpublished. Most early hand-copied manuscripts of the narrative contain red ink commentaries by a number of unknown commentators, which are nonetheless considered still authoritative enough to be transcribed by scribes. Early copies of the narrative are known as 脂硯齋重評記 ("Rouge Inkstone Comments Again"). These versions are known as 脂本, or "Rouge Versions", in Chinese.

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