INVESTIGADORES
MALANGA Gabriela Fabiana
artículos
Título:
Energy density of Sub-Antarctic fishes from the Beagle Channel
Autor/es:
D. A. FERNÁNDEZ; M. E. LATTUCA; C. C. BOY; A. F. PÉREZ; S. G. CEBALLOS; F. A. VANELLA; E. R. MORRICONI; G. F. MALANGA; D. R. AURELIANO; S. RIMBAU; J. CALVO
Revista:
FISH PHYSIOLOGY AND BIOCHEMISTRY
Editorial:
SPRINGER
Referencias:
Año: 2008 p. 1 - 8
ISSN:
0920-1742
Resumen:
The energy density (ED) of nine species of
sub-Antarctic fishes was estimated by calorimetry. The
fish, seven notothenioids, one atherinopsid and one
galaxiid, represents some of the more abundant species
in the ichthyofauna of the Beagle Channel. Principalcomponents
analysis (PCA) of the ED of the different
organs/tissues indicated that PC1 and PC2 accounted
for 87% of the variability. Separation along PC11 and PC2 accounted
for 87% of the variability. Separation along PC11
corresponded to differences in muscle and liver energy
densities whereas separation along PC2 corresponded
to differences in the ED of the gonads. Differences
between species were significant except for P. sima.
Inclusion of the gonadosomatic index (GSI) as an
explanatory variable enabled us to establish the
existence of energy transfer from muscle and liver to
the gonads in ripe P. tessellata females. Total ED
values varied between 4.21 and 6.26 kJ g-1, the
pelagic Odontesthes sp. being the species with the
highest ED. A significant relationship between ED and
muscle dry weight (DWM) was found for all the species
except P. tessellata. These data are the first direct
estimates of ED of fishes from the Beagle Channel2 corresponded
to differences in the ED of the gonads. Differences
between species were significant except for P. sima.
Inclusion of the gonadosomatic index (GSI) as an
explanatory variable enabled us to establish the
existence of energy transfer from muscle and liver to
the gonads in ripe P. tessellata females. Total ED
values varied between 4.21 and 6.26 kJ g-1, the
pelagic Odontesthes sp. being the species with the
highest ED. A significant relationship between ED and
muscle dry weight (DWM) was found for all the species
except P. tessellata. These data are the first direct
estimates of ED of fishes from the Beagle ChannelP. sima.
Inclusion of the gonadosomatic index (GSI) as an
explanatory variable enabled us to establish the
existence of energy transfer from muscle and liver to
the gonads in ripe P. tessellata females. Total ED
values varied between 4.21 and 6.26 kJ g-1, the
pelagic Odontesthes sp. being the species with the
highest ED. A significant relationship between ED and
muscle dry weight (DWM) was found for all the species
except P. tessellata. These data are the first direct
estimates of ED of fishes from the Beagle ChannelP. tessellata females. Total ED
values varied between 4.21 and 6.26 kJ g-1, the
pelagic Odontesthes sp. being the species with the
highest ED. A significant relationship between ED and
muscle dry weight (DWM) was found for all the species
except P. tessellata. These data are the first direct
estimates of ED of fishes from the Beagle Channel-1, the
pelagic Odontesthes sp. being the species with the
highest ED. A significant relationship between ED and
muscle dry weight (DWM) was found for all the species
except P. tessellata. These data are the first direct
estimates of ED of fishes from the Beagle ChannelOdontesthes sp. being the species with the
highest ED. A significant relationship between ED and
muscle dry weight (DWM) was found for all the species
except P. tessellata. These data are the first direct
estimates of ED of fishes from the Beagle ChannelM) was found for all the species
except P. tessellata. These data are the first direct
estimates of ED of fishes from the Beagle ChannelP. tessellata. These data are the first direct
estimates of ED of fishes from the Beagle Channel