Τίτλος:
Investigating growth and reproduction of the Mediterranean swordfish
Xiphias gladius through a full life cycle bioenergetics model
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
A Wisconsin type bioenergetics model was developed to investigate the
growth and reproduction of the Mediterranean swordfish Xiphias gladius
L., 1758. Reproduction was simulated using an energy allocation
algorithm with a fixed part of assimilated energy stored for egg
production. Stomach contents were used to estimate the daily ration of
swordfish (3% of body weight for adults) in order to calibrate the
consumption compartment. The model outputs of growth were in agreement
with fisheries observation data, with estimates of annual egg production
(similar to 17.5 million eggs) per individual similar to those stemming
from stock assessment datasets. Our study highlights the importance of
bioenergetics in the reproduction of swordfish, suggesting that each
individual is reproductively active for similar to 15 d, while the
commonly reported spawning season of the whole population lasts similar
to 90 d. Sensitivity analysis showed that swordfish growth and
reproduction is largely controlled by consumption and respiration
parameters. We provide a detailed description of a full life cycle
swordfish bioenergetics model that could be embedded as a module in an
end-to-end modelling framework, ultimately describing the population
dynamics of the Mediterranean swordfish stock in relation to
environmental variability.
Συγγραφείς:
Hatzonikolakis, Yannis
Tsiaras, Kostas
Tserpes, George and
Somarakis, Stylianos
St John, Michael A.
Peristeraki, Panagiota
and Raitsos, Dionysios E.
Triantafyllou, George
Περιοδικό:
Marine Ecology Progress Series
Λέξεις-κλειδιά:
Swordfish; Mediterranean; Bioenergetics; Model; Growth; Reproduction;
End-to-end
