INVESTIGADORES
SCHIAVINI Adrian Carlos Miguel
artículos
Título:
Avian Predation at a Southern Rockhopper Penguin colony on Staten Island, Argentina
Autor/es:
LILJESTHRÖM, M; EMSLIE, S; D. FRIERSON,; ADRIAN CARLOS MIGUEL SCHIAVINI
Revista:
POLAR BIOLOGY
Editorial:
SPRINGER
Referencias:
Año: 2008 vol. 31 p. 465 - 474
ISSN:
0722-4060
Resumen:
Abstract We studied predation risk in relation to nest
location and subcolony size in Southern Rockhopper
Penguins (Eudyptes chrysocome chrysocome) during the
chick-rearing period. Striated Caracaras (Phalcoboenus
australis), the main predator, preferentially attacked from
tussock grasses which are found in the periphery of all subcolonies
(peripheral tussocks) and often scattered within
them (central tussocks). The greatest numbers of predation
and attempted predation events were observed on nests in
the periphery of the subcolony next to peripheral tussocks,
and on those nests next to central tussocks. Central tussocks
oVer Striated Caracaras an additional edge area from
which to prey, much in the same way as do the peripheral
tussocks. Predation rate per individual was not correlated
with subcolony size possibly due to the presence of central
tussocks which, by creating an extra edge area, change the
subcolony shape. There is a suggestion (P = 0.06) of
increased probability of nest success with subcolony size.
We studied predation risk in relation to nest
location and subcolony size in Southern Rockhopper
Penguins (Eudyptes chrysocome chrysocome) during the
chick-rearing period. Striated Caracaras (Phalcoboenus
australis), the main predator, preferentially attacked from
tussock grasses which are found in the periphery of all subcolonies
(peripheral tussocks) and often scattered within
them (central tussocks). The greatest numbers of predation
and attempted predation events were observed on nests in
the periphery of the subcolony next to peripheral tussocks,
and on those nests next to central tussocks. Central tussocks
oVer Striated Caracaras an additional edge area from
which to prey, much in the same way as do the peripheral
tussocks. Predation rate per individual was not correlated
with subcolony size possibly due to the presence of central
tussocks which, by creating an extra edge area, change the
subcolony shape. There is a suggestion (P = 0.06) of
increased probability of nest success with subcolony size.
Eudyptes chrysocome chrysocome) during the
chick-rearing period. Striated Caracaras (Phalcoboenus
australis), the main predator, preferentially attacked from
tussock grasses which are found in the periphery of all subcolonies
(peripheral tussocks) and often scattered within
them (central tussocks). The greatest numbers of predation
and attempted predation events were observed on nests in
the periphery of the subcolony next to peripheral tussocks,
and on those nests next to central tussocks. Central tussocks
oVer Striated Caracaras an additional edge area from
which to prey, much in the same way as do the peripheral
tussocks. Predation rate per individual was not correlated
with subcolony size possibly due to the presence of central
tussocks which, by creating an extra edge area, change the
subcolony shape. There is a suggestion (P = 0.06) of
increased probability of nest success with subcolony size.
Phalcoboenus
australis), the main predator, preferentially attacked from
tussock grasses which are found in the periphery of all subcolonies
(peripheral tussocks) and often scattered within
them (central tussocks). The greatest numbers of predation
and attempted predation events were observed on nests in
the periphery of the subcolony next to peripheral tussocks,
and on those nests next to central tussocks. Central tussocks
oVer Striated Caracaras an additional edge area from
which to prey, much in the same way as do the peripheral
tussocks. Predation rate per individual was not correlated
with subcolony size possibly due to the presence of central
tussocks which, by creating an extra edge area, change the
subcolony shape. There is a suggestion (P = 0.06) of
increased probability of nest success with subcolony size.
), the main predator, preferentially attacked from
tussock grasses which are found in the periphery of all subcolonies
(peripheral tussocks) and often scattered within
them (central tussocks). The greatest numbers of predation
and attempted predation events were observed on nests in
the periphery of the subcolony next to peripheral tussocks,
and on those nests next to central tussocks. Central tussocks
oVer Striated Caracaras an additional edge area from
which to prey, much in the same way as do the peripheral
tussocks. Predation rate per individual was not correlated
with subcolony size possibly due to the presence of central
tussocks which, by creating an extra edge area, change the
subcolony shape. There is a suggestion (P = 0.06) of
increased probability of nest success with subcolony size.
Ver Striated Caracaras an additional edge area from
which to prey, much in the same way as do the peripheral
tussocks. Predation rate per individual was not correlated
with subcolony size possibly due to the presence of central
tussocks which, by creating an extra edge area, change the
subcolony shape. There is a suggestion (P = 0.06) of
increased probability of nest success with subcolony size.
P = 0.06) of
increased probability of nest success with subcolony size.