Assertion: spiny dogfish's fin | /r/HasProperty | wilga
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Source sentences:
text: Muscle activity that results in increased fin stiffness has been observed in pectoral fins of sturgeon (Wilga & Lauder, 1999), in the radialis muscle of shark tails (Flammang, 2010) and in the hemitrichia of actinopterygians (Arita, 1971).