Scientists already knew that bonnethead
sharks eat seagrass along with the squid and shrimp they gobble up on the ocean floor.
Samantha Leigh, a UC Irvine researcher with the department of ecology and evolutionary biology and lead author of the study, said she grew interested in the bonnethead
's diet after reading a 2007 study on how the species eats lots of grass.
For years, scientists have studied bonnethead
sharks and their physical traits.
Caption: The author holding a bonnethead
shark; a student measures a young bonnethead
Electroreception in neonatal bonnethead
sharks, Sphyrna tiburo.
Dubai Aquarium and Underwater Zoo is now home to the smallest members of the hammerhead shark family - the bonnethead
or shovelhead sharks.
sharks from the Caribbean seas average 30-50 inches (70-127cm) in length and weigh up to 24 pounds (10.8kg).
Researchers examined three species of sharks - blacktip, bonnethead
and nurse sharks - in an artificial flow channel inside the Mote Marine Laboratory in Sarasota, Florida.
(<10 mm) to bonnethead
shark Sphyrna tiburo (>1,000 mm).
2,415.0 Northern kingfish Menticirrhus saxatilis 177.8 Gafftopsail catfish Bagre marinus 1,990.7 Irridescent swimming crab Portunus gibbesii 8.7 Flounder (family) Bothidae 1,699.4 Bonnethead
shark Sphyrna tiburo 1,252.0 Atlantic cutlassfish Trichiurus lepturus 1,225.5 Black drum Pogonias cromis 1,402.7 Blue crab Callinectes sapidus Weakfish Cynoscion regalis Atlantic bumper Chloroscombrus chrysurus 1,062.8 Sand perch Diplectrum formosum 953.4 Longspine swimming crab Portunus spinicarpus 4.5 Vermillion (B-liner) Rhomboplites aurorubens 893.2 snapper Left-eye flounder Syacium spp.
BMAA was detected in 23 of 29 fin samples and in all species tested--nurse, great hammerhead, lemon, bull, bonnethead
, blacknose, and blacktip sharks--at concentrations of 144-1,836 ng/mg wet weight.