TY - JOUR
T1 - Feeding habits of the horn shark Heterodontus francisci (Girard, 1855) in the northwest of Baja California Sur, Mexico
AU - Cortés-Fuentes, Christian
AU - Simental-Anguiano, María del Rosario
AU - Galván-Magaña, Felipe
AU - Medina-López, Marco Antonio
N1 - Publisher Copyright:
© 2020 Blackwell Verlag GmbH
PY - 2020/4/1
Y1 - 2020/4/1
N2 - The feeding habits of the horn shark, Heterodontus francisci (Girard, 1855), were examined in the area of Bahía Tortugas, Baja California Sur, Mexico in the spring, summer and fall of 2014. A total of 78 stomachs were collected, of which 46 (59%) contained food and 32 (41%) were empty. According to the percent Index of Relative Importance (%IRI), the most important prey categories in H. francisci's diet were anomurans (66%), cephalopods (7.2%), lobsters (4.7%), fishes (4.2%) and sea urchins (2.3%). The main prey were the anomuran Blepharipoda occidentalis (65.2%), the octopus Octopus bimaculatus (5.4%), the lobster Panulirus interruptus (4.7%) and the sea urchin Echinometra vanbrunti (2.6%). According to the Levin standardized Index (Bi), the trophic niche breadth in H. francisci is low (Bi = 0.21), making it a specialist predator. The species was classified as a tertiary consumer (trophic position = 4.06).
AB - The feeding habits of the horn shark, Heterodontus francisci (Girard, 1855), were examined in the area of Bahía Tortugas, Baja California Sur, Mexico in the spring, summer and fall of 2014. A total of 78 stomachs were collected, of which 46 (59%) contained food and 32 (41%) were empty. According to the percent Index of Relative Importance (%IRI), the most important prey categories in H. francisci's diet were anomurans (66%), cephalopods (7.2%), lobsters (4.7%), fishes (4.2%) and sea urchins (2.3%). The main prey were the anomuran Blepharipoda occidentalis (65.2%), the octopus Octopus bimaculatus (5.4%), the lobster Panulirus interruptus (4.7%) and the sea urchin Echinometra vanbrunti (2.6%). According to the Levin standardized Index (Bi), the trophic niche breadth in H. francisci is low (Bi = 0.21), making it a specialist predator. The species was classified as a tertiary consumer (trophic position = 4.06).
KW - trophic niche breadth
KW - trophic position
KW - trophic spectrum
UR - http://www.scopus.com/inward/record.url?scp=85079119974&partnerID=8YFLogxK
U2 - 10.1111/jai.14004
DO - 10.1111/jai.14004
M3 - Artículo
SN - 0175-8659
VL - 36
SP - 197
EP - 202
JO - Journal of Applied Ichthyology
JF - Journal of Applied Ichthyology
IS - 2
ER -