Evaluating the use of non‐invasive hair sampling and ddRAD to characterize populations of endangered species: Application to a peripheral population of the European mink
Ecology and Evolution,
Journal Year:
2023,
Volume and Issue:
13(9)
Published: Sept. 1, 2023
The
application
of
next-generation
sequencing
(NGS)
to
non-invasive
samples
is
one
the
most
promising
methods
in
conservation
genomics,
but
these
types
present
significant
challenges
for
NGS.
European
mink
(
Language: Английский
Evaluating streamflow and temperature effects on Bull Trout migration and survival with linear spatial capture–recapture models
Transactions of the American Fisheries Society,
Journal Year:
2024,
Volume and Issue:
153(3), P. 326 - 346
Published: April 11, 2024
Abstract
Objective
In
the
U.S.
Pacific
Northwest,
climate
change
is
increasing
air
temperatures,
decreasing
warm
season
(April–September)
streamflow,
and
cool
(October–March)
streamflow.
Warmer
water
temperatures
may
alter
conditions
for
migratory
coldwater
fishes
like
Bull
Trout
Salvelinus
confluentus
.
Consequently,
an
understanding
of
migration
survival
critical
species
conservation
restoration.
Salmon
River
basin,
Idaho,
1992
1993
transpired
to
be
two
most
opposing
extreme
years
among
past
three
decades
temperature
These
extremes
provided
a
unique
opportunity
retrospectively
compare
under
potential
scenarios.
Methods
We
evaluated
prespawning
postspawning
migrations
fluvial
that
were
radio‐tagged
tracked
from
1994.
used
Cormack–Jolly–Seber
linear
spatial
capture–recapture
model
simultaneously
prespawn
(
n
=
58)
postspawn
23)
weeks
river
reaches
with
temperature,
habitat
covariates.
Result
Most
individual
similar
tagged
fish,
whereas
fish
adopted
multiple
overwintering
strategies.
Movements
larger
when
(1)
weekly
average
daily
maximum
streamflow
increased
(2)
increased.
The
estimated
at
least
52%
spawners
survived
spawning,
mean
apparent
was
higher
in
low‐streamflow
year
(1992)
than
more
variable
(1993).
Survival
1992–1994
during
38‐week
period
intermediate
period.
Detections
generally
sites
complex
habitats,
less
large
woody
debris,
fewer
undercut
banks.
Conclusion
found
life
stage
can
represent
shorter
time
frame
(14–18
weeks)
mortality
compared
longer
(38
weeks).
lower
variability,
indicating
expected
future
changes
adversely
affect
Trout.
Language: Английский
Assessment of predation on small semi-aquatic mammals by the Eurasian otter through genetic analysis of spraints
Mammalian Biology,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 8, 2024
Abstract
Small
semi-aquatic
mammals
play
a
critical
role
in
the
river
ecosystem
and
can
be
used
as
bioindicators
of
environmental
health.
Many
populations
these
species
are
threatened
by
multiple
factors,
mainly
habitat
degradation,
but
also
other
causes
such
predation.
Among
potential
predators,
Eurasian
otter
(
Lutra
lutra
)
is
known
to
prey
on
some
species,
significance
impact
their
remains
uncertain.
To
study
effect
small
mammal
community,
we
collected
feces
containing
hair
from
different
rivers
Iberian
Peninsula
genetic
methods
identify
predator
species.
We
identified
83
spraints
25
desmans
Galemys
pyrenaicus
),
21
water
shrews
Neomys
anomalus
28
Southern
voles
Arvicola
sapidus
).
These
were
recorded
watersheds
throughout
area
over
long
period
time,
indicating
widespread
presence
diet.
findings
particular
concern
for
desman,
given
its
endangered
status.
Our
results
highlight
need
specifically
investigate
less
abundant
ecologically
significant
groups
consumed
otter,
mammals,
better
understand
influence
this
riparian
ecosystem.
In
addition,
future
efforts
should
address
analysis
carnivores
assess
predation
viability
populations.
Language: Английский