Sentence:  Fertilized <WSD>groundling</WSD> (Misgurnus fossilis) and sturgeon (Acipenser Stellatus) eggs were irradiated (10,000 r) at stages from fertilization to middle gastrulation. 
Meaning of the word marked with <WSD> tags:  The (spined loach) ("Cobitis taenia"), weather loach ( (noshow=1)), or other member of the loaches.