@article{fdi:010066084, title = {{E}stimating natural mortality rates and simulating fishing scenarios for {G}ulf of {M}exico red grouper ({E}pinephelus morio) using the ecosystem model osmose-wfs}, author = {{G}russ, {A}. and {S}chirripa, {M}. {J}. and {C}hagaris, {D}. and {V}elez, {L}aure and {S}hin, {Y}unne-{J}ai and {V}erley, {P}hilippe and {O}liveros-{R}amos, {R}. and {A}insworth, {C}. {H}.}, editor = {}, language = {{ENG}}, abstract = {{T}he ecosystem model {OSMOSE}-{WFS} was employed to evaluate natural mortality rates and fishing scenarios for {G}ulf of {M}exico ({GOM}) red grouper ({E}pinephelus mono). {OSMOSE}-{WFS} represents major high trophic level ({HIT}.) groups of species of the {W}est {F}lorida {S}helf, is forced by the biomass of plankton and benthos groups, and has a monthly tin-se step. {T}he present application of the model uses a recently developed 'stochastic mortality algorithm' to resolve the mortality processes of {HTL} groups. {OSMOSE}-{WFS} predictions suggest that the natural mortality rate of juveniles of {GOM} red grouper is high and essentially due to predation, while the bulk of the natural mortality of adult red grouper results from causes not represented in {OSMOSE}-{WFS} such as, presumably, red tides. {T}hese results were communicated to {GOM} red grouper stock assessments. {M}oreover, {OSMOSE}-{WFS} indicate that altering the fishing mortality of {GOM} red grouper may have no global impact on the biomass of the major prey of red grouper, due to the high complexity and high redundancy of the modeled system. {B}y contrast altering the fishing mortality of {GOM} red grouper may have a large impact on the biomass of its major competitors. {I}ncreasing the fishing mortality of red grouper would increase the biomass of major competitors, due to reduced competition for food. {C}onversely, decreasing the fishing mortality of red grouper would diminish the biomass of major competitors, due to increased predation pressure on the juveniles of the major competitors by red grouper. {T}he fishing scenarios that we evaluated may have slightly different impacts in the real world, due to some discrepancies between the diets of red grouper and its major competitors predicted by {OSMOSE}-{WFS} and the observed ones. {M}odifications in {OSMOSE}-{WFS} are suggested to reduce these discrepancies.}, keywords = {{M}arine ecosystem modeling ; {W}est {F}lorida {S}helf ; {N}atural mortality ; {F}ishing scenarios ; {R}ed grouper ; {G}ulf of {M}exico ; {ETATS} {UNIS} ; {MEXIQUE} {GOLFE} ; {FLORIDE}}, booktitle = {}, journal = {{J}ournal of {M}arine {S}ystems}, volume = {154}, numero = {{B}}, pages = {264--279}, ISSN = {0924-7963}, year = {2016}, DOI = {10.1016/j.jmarsys.2015.10.014}, URL = {https://www.documentation.ird.fr/hor/fdi:010066084}, }