Jul 14, 2023
spined assassin egg cases by myriorama https://flic.kr/p/2iXGuFD
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spined assassin egg cases by myriorama https://flic.kr/p/2iXGuFD
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Life after death: how we hatched live shark pups from dead parents
Back in December 2012, I met up with Greg Nowell, co-founder of Sharklab-Malta, a non-profit NGO founded in 2008. Sharklab collaborates with shark researchers on a global and local scale, with an overall mission to highlight the current plight of sharks in our oceans whilst increasing awareness and education of the public.
Greg was interested in my experience working with neonate small spotted catsharks (Scyliorhinus canicula) and the greater spotted catshark (Scyliorhinus stellaris); in the UK these are usually known as the lesser spotted dogfish and bull huss, respectively. At Macduff Marine Aquarium I’d worked with both species, as well as on the maintenance of viable eggcases, which resulted in successful hatching and rearing of shark pups.
Greg was interested because earlier in 2012 he had started going to the wholesale fish market in Valetta to recover eggcases from dead S. canicula and S. stellaristhat had been trawl-captured in the Mediterranean. He had been placing the eggcases in a home aquarium system to see if they were viable and, if so, to observe development.
A study by Ballard et al in 1993 had shown that viable eggcases could be removed from dead S. canicula, but the embryos in used purely to observe development. Greg’s idea was to take this further: allow the sharks to hatch, rear them for a few months to ensure they were feeding well and then release them back into the wild.
My last week at ARMI thought me these are shark egg cases! Not sure what type #sharkegg #eggcases