Hi Bob
Apologies for the long post, but you did ask! Some references looking at the
impact of banding in waders. Google Scholar is your friend : )
Note I have not filtered these at all, these were all the references that came
up within a couple of clicks for the search term 'impact wader leg banding' and
following citations / related articles from some of the initial articles.
Ringing or colour-banding does not increase predation mortality
in redshanksTringa totanus
W. Cresswell (correspondence) et al, Journal of Avian Biology
Volume 38, Issue 3, pages 309?316, May 2007
ABSTRACT:
The use of metal and colour-rings or bands as a means of measuring survival,
movements and behaviour in birds
is universal and fundamental to testing ecological and evolutionary theories.
The practice rests on the largely
untested assumption that the rings do not affect survival. However this
assumption may not hold for several
reasons, for example because the ?oddity effect? predicts predators select prey
that appear different to their
neighbours in order to avoid the ?confusion effect?. We compared the foraging
behaviour and the death rates of
redshanks Tringa totanus conspicuously marked with six colour rings and one
metal ring each to unmarked birds
in a study system, where routinely up to 50% of the total population are killed
by avian predators during a
winter. If avian predators selectively target and/or have a higher capture
success of ringed birds then we would
predict the proportion of colour-ringed birds in the population to decline
through a winter. The proportion of
colour-ringed birds in the population did not change over the course of three
separate winters, and in one winter
the ratio of marked:unmarked birds found killed by sparrowhawks Accipiter nisus
was the same as the ratio of
marked birds alive in the population. In the year with largest sample size,
power was sufficient to detect a greater
than 2.2% difference in predation rate between ringed and unringed groups. The
average kill rate difference
between ringed and unringed birds across the three winters was less than 1%
(0.7392.2%) suggesting that even
if there were differences in predation rate that were not detected because of
low statistical power they were
extremely small. There were no differences in any foraging measures comparing
ringed and unringed birds,
suggesting that the rings did not affect the ability of birds to meet their
daily energy budgets. The results showed
that colour-ringed birds were not preferentially targeted or killed by avian
predators, and suggest that the
presence of a metal and even several large colour-rings is unlikely to affect
behaviour and predation mortality
even under extreme selection.
Effects of color banding, radio tagging, and repeated handling on the condition
and survival of Lapwing chicks and consequences for estimates of breeding
productivity
Fiona Sharpe et al Journal of Field Ornithology
Volume 80, Issue 1, pages 101?110, March 2009
ABSTRACT Color bands and radio tags are widely used to facilitate individual
recognition and relocation of precocial chicks in studies of prefledging
survival. However, the accuracy of data collected and subsequent estimates of
survival rates rely on the assumption that such techniques do not affect the
parameters under study. We compared the body condition and survival of
color-banded and radio-tagged Lapwing (Vanellus vanellus) chicks with
noncolor-banded and nonradio-tagged individuals using a 10-year dataset (N=
3174 chicks, with 205 color banded and 700 radio tagged). Color bands did not
adversely affect chicks. However, radio-tagged chicks and their untagged
broodmates were handled more frequently because these broods were more readily
encountered than those without a tagged member. Chicks disturbed and handled
more frequently had lower body condition indices and higher mortality rates.
Simulations of the impact of tagging and handling on breeding productivity
under tw!
o scenarios indicated a 26% reduction in productivity in situations where nest
and chick survival rates were low (as in our study), but only a 7% reduction in
productivity for a simulated population with the higher levels of nest and
chick survival associated with a stable population. The frequent disturbance
associated with radio-tracking and recapturing chicks, rather than the
attachment of a tag or physical handling of chicks, may affect body condition.
Frequent handling and disturbance may affect body condition by reducing
foraging time, increasing stress levels, or increasing predation risk. Because
our results suggested that the negative impact of handling could last up to a
week, we recommend that investigators avoid disturbance of shorebird chicks
more frequently than every 8 d.
Colored plastic and metal leg bands do not affect survival of Piping Plover
chicks
Erin A. Roche et al
Journal of Field Ornithology
Volume 81, Issue 3, pages 317?324, September 2010
ABSTRACT Leg bands are commonly used to mark shorebird chicks as young as 1-d
old, but little is known about the possible impacts of bands on survival of
prefledging shorebirds. We used a mark-recapture framework to assess the impact
of bands and banding-related disturbance on prefledging survival in a federally
endangered population of Piping Plovers (Charadrius melodus) breeding in the
Great Lakes region from 2000 to 2008. We banded approximately 96% of all
surviving chicks hatched prior to fledging, typically between 5 and 15 d of
age. We used a multistate approach in program MARK whereby individuals
contributed data as unbanded chicks before capture (N= 1073) and as banded
chicks afterward (N= 780). The cumulative probability of surviving through 24 d
of age was 0.63 and did not differ between banded and unbanded chicks. In
addition, we found a positive effect of banding-related disturbance on survival
up to 3 d following banding (β= 0.60 CI: 0.17?1.02), possibly du!
e to increased postbanding vigilance on the part of chicks and adults. Our
results indicate that banding has no detrimental effect on survival of Piping
Plover chicks prior to fledging and that current capture and banding methods
are appropriate for this endangered species.
Journal of Field Ornithology 72(4):521-526. 2001
EFFECTS OF COLOR BANDS ON SEMIPALMATED SANDPIPERS BANDED AT HATCH
Abstract
Effects of color bands on adult birds have been investigated in many studies,
but much less is known about the effects of bands on birds banded at hatch. We
captured Semipalmated Sandpiper (Calidris pusilla) chicks at hatch on the
Alaskan North Slope and attached 0?3 bands to them. The chicks were resighted
and reweighed during the subsequent two weeks. The number of chicks banded
varied from 18 to 21 among treatments; 6?9 were resighted, and 6?7 were
reweighed, per treatment. The proportion resighted varied from 0.33 to 0.45.
The estimated resighting probability, given that we encountered a brood, was
82%. We tested for effects of the bands on survival and mass gain by analyzing
whether the proportion of chicks resighted, or their mass, varied with the
number of bands. We found no evidence that bands affected the chicks and were
able to rule out (with 95% confidence) a decline in survivorship of more than
13% and a loss of mass of more than 10%. Although bands had little if!
any effect on chicks in our study, we believe their effects should be
evaluated whenever survivorship or mass gain are estimated using color-marked
chicks.
Foot Losses of Metal Banded Snowy Plovers (Pérdidas de Pies en Chorlitejos
Patinegros (Charadrius Alexandrinus) con Anillas Metálicas)JA Amat - Journal of
Field Ornithology, 1999 - JSTOR
Abstract
During a 7-yr study on Snowy Plovers (Charadrius alexandrinus) in southern
Spain, I banded 1072 birds. Of these, 0.6% had natural leg injuries when first
captured. Of 412 plovers that were recaptured or resighted in years following
banding, 1.9% had injuries caused by the metal band, the most common of which
was foot loss. All these birds had the metal band on the tarsus, and no plover
with metal band on the tibia was recaptured with injuries. Though foot losses
did not prevent breeding, and leg injuries probably had little effects on
population dynamics, it is recommended that metal banding of shorebirds on the
tarsus should be avoided.
BANDING AND FOOT LOSS: AN ADDENDUM
C. L. C-RATTO-TREVOR
Prairie and Northern Wildlife Research Centre
115 Perimeter Road
Saskatoor?,S askatchewanS 7N OX,? Canada
Abstract.--Nine of 2583 (0.3%) adult shorebirds captured during migration had
natural,
healedl eg injuries (rangingf rom 0.0 to 0.5% in differents pecies)I.n a
long-terms tudyo f
a breedingp opulationo f SemipalmatedS andpipers(C alidrisp usilia),n o birdsw
ere known
to be injured from the metal CWS/USFWS bands used. One of the 278 individuals
resighted
at least 1 yr later suffered a leg injury from a color band that was too small.
In at least
some species of shorebirdsl,e g injuries from banding activitiesa re rare when
appropriate
bands and techniques are used.
===============================
To unsubscribe from this mailing list,
send the message:
unsubscribe
(in the body of the message, with no Subject line)
to:
http://birding-aus.org
===============================
|
