TY - JOUR
T1 - The trophic role of lutjanid fish and impacts of their fisheries in two ecosystems in the Gulf of Mexico
AU - Arreguin-Sanchez, F.
AU - Manickchand-Heileman, S.
PY - 1998
Y1 - 1998
N2 - The trophic role of snappers was evaluated on the continental shelves of the south-western Gulf of Mexico and the Yucatan in the south-eastern Gulf of Mexico. Mass-balanced, steady-state trophic models of the two ecosystems were constructed with Ecopath and perturbations were simulated in the ecosystems with Ecosim by increasing fishing mortality. Impacts were measured by changes in biomass of snappers and other groups, and in some indices of stability: persistence, recovery time and resilience. The snapper populations differed between ecosystems. The western Gulf of Mexico system appeared more complex and more stable than the Continental Shelf of Yucatan. Although overall stability indices between ecosystem suggested a similar structure and function, there were clear differences at a group level. Correlation of stability attributes between groups suggested differences in the role of snappers between the ecosystems suggesting that each stock should be managed individually.
AB - The trophic role of snappers was evaluated on the continental shelves of the south-western Gulf of Mexico and the Yucatan in the south-eastern Gulf of Mexico. Mass-balanced, steady-state trophic models of the two ecosystems were constructed with Ecopath and perturbations were simulated in the ecosystems with Ecosim by increasing fishing mortality. Impacts were measured by changes in biomass of snappers and other groups, and in some indices of stability: persistence, recovery time and resilience. The snapper populations differed between ecosystems. The western Gulf of Mexico system appeared more complex and more stable than the Continental Shelf of Yucatan. Although overall stability indices between ecosystem suggested a similar structure and function, there were clear differences at a group level. Correlation of stability attributes between groups suggested differences in the role of snappers between the ecosystems suggesting that each stock should be managed individually.
KW - Gulf of Mexico
KW - Simulation
KW - Snapper
KW - Stability
KW - Trophic model
UR - http://www.scopus.com/inward/record.url?scp=0032413223&partnerID=8YFLogxK
U2 - 10.1006/jfbi.1998.0802
DO - 10.1006/jfbi.1998.0802
M3 - Artículo
AN - SCOPUS:0032413223
SN - 0022-1112
VL - 53
SP - 143
EP - 153
JO - Journal of Fish Biology
JF - Journal of Fish Biology
IS - SUPPL. A
ER -