Annals of Bangladesh Agriculture,
Год журнала:
2023,
Номер
27(2), С. 161 - 174
Опубликована: Дек. 31, 2023
The
objective
of
this
study
was
to
assess
the
temperature-humidity
index
(THI)
values
in
selected
regions
Bangladesh
for
suitability
ruminant
rearing.
Data
on
monthly
temperatures
and
relative
humidity
were
collected
from
Meteorological
Department
(BMD)
a
27-year
time
period
(1995–2022).
region’s
data
indicated
that
hottest
area
west
central
region
month
June.
In
comparison,
coolest
northwest
January.
had
no
heat
stress
November
February,
mild
March
May
October,
as
well
moderate
June
September.
northeast
region,
occurred
May,
November,
December
February
comfortable,
March,
stress,
April
through
September
region.
east
April,
severe
contrast
which
showed
during
rainy
season,
most
other
seasons
stress.
Thus,
periods
might
vary
depending
regional
meteorological
scenarios.
Animals
faced
(THI
>
72)
or
warning
signal
due
progressive
increase
temperature
indices
over
months
years
investigation.
When
THI
levels
are
high,
especially
July
August,
livestock
farmers
must
emphasize
various
herd
management
techniques
limit
risk
milk
production
quality
concerns,
disease
prevalence,
reproductive
performance.
findings
present
investigation
suggest
mitigation
measures
Bangladeshi
farmers.
Ann.
Agric.
27
(2):
161-174
Animals,
Год журнала:
2024,
Номер
14(12), С. 1769 - 1769
Опубликована: Июнь 12, 2024
The
evaluation
of
the
reactivity
and
distress
cattle
during
corral
management,
by
means
subjective
scores,
aims
at
standardization
behavioral
indicators,
through
non-invasive
methods,
in
addition
to
enabling
development
more
appropriate
management
practices,
thus
promoting
comfort
well-being
these
animals.
Therefore,
this
study,
we
aimed
characterize
temperament
managed
a
using
indicators
rainiest
period.
For
this,
experiment
was
conducted
on
property
located
municipality
Mojuí
dos
Campos,
quarter
(February–April).
Thus,
30
male
cattle,
not
castrated,
approximately
29
months
age,
clinically
healthy,
weighing
310
+
20
kg,
were
divided
into
three
rearing
systems:
silvopastoral
(SP),
traditional
(SS),
integrated
(SI)
systems.
There
10
animals
per
system.
Physiological
parameters
collected
evaluate
rectal
temperature
(RT)
respiratory
rate
(RR),
as
well
body
surface
(BST),
thermal
windows
(head
flank
infrared
rump
temperature).
To
reactivity,
scores
indicative
behavior
used,
namely
escape
speed
(ES),
tension
score
(SS_1),
(SS_2),
scale
(RS),
movement
(MS),
(TS).
results
showed
that
there
amplitude
5.9
°C
average
8.6
maximum
when
comparing
structure
trees.
In
addition,
comparisons
between
production
systems
for
variables
did
differ
5%
significance
level,
except
ES,
where
system
differed
from
system,
showing
intermediate
values
both.
positive
correlation
RT
RR
(r
=
0.72;
p
<
0.01),
SS_2
0.38;
0.04),
MS
0.47;
RS
0.37;
SS_1
0.41;
0.02),
0.39;
0.03),
0.58;
0.00),
0.50;
TS
0.61;
0.51;
0.44;
negative
ES
−0.42;
0.02).
rainy
season
had
major
influence
levels
handling
corral,
evidenced
association
physiological
parameters.
Reproduction in Domestic Animals,
Год журнала:
2024,
Номер
59(6)
Опубликована: Июнь 1, 2024
Abstract
Artificial
insemination
(AI)
centres
select
bulls
as
calves
according
to
their
genetic
breeding
values
and
raise
them
until
the
first
semen
collection;
yet,
a
high
dropout
rate
of
reared
is
problem
for
AI
centres.
Potential
hormonal
indicators
bull
sexual
maturation
(cortisol,
dehydroepiandrosterone
(DHEA),
testosterone,
oestradiol,
insulin‐like
growth
factor
1
(IGF‐1))
were
observed
evaluated
in
relation
performance
parameters
perhaps
identify
candidate
biomarkers
allowing
an
early
selection
suitable
sires.
Blood
samples
from
102
German
Holstein
at
4
±
1,
8
12
2
months
age
six
analysed
using
validated
immunoassays
cortisol,
DHEA,
oestradiol
IGF‐1.
Semen
analyses
included
native
thawed
diluted
semen.
Bulls
classified
collection
into
groups
with
good
versus
poor
(GP
vs.
LP).
After
years,
subsequent
differentiation
was
done
(HPP),
medium
(MPP)
low
persistency
(LPP).
Age
important
sperm
quality.
Cortisol
concentrations
decreased
age,
but
cortisol/DHEA
ratio
only
GP
(
p
<
.05).
Oestradiol
testosterone
both
correlated
libido
behaviour
Testosterone
IGF‐1
higher
time
increased
In
conclusion,
are
associated
future
persistency,
might
be
useful
consistent
producing
on
PLoS ONE,
Год журнала:
2023,
Номер
18(7), С. e0288257 - e0288257
Опубликована: Июль 12, 2023
The
goal
of
this
study
was
to
verify
the
effect
heterogeneity
variance
(HV)
on
milk
production
in
up
305
days
lactation
(L305)
daughters
Girolando,
Gir
and
Holstein
sires,
as
well
genetic
evaluation
these
sires
their
progenies.
Brazil.
model
included
contemporary
groups
(consisting
herd,
year
calving
season)
a
fixed
effect,
cow
age
at
(linear
quadratic
effects)
heterozygosity
effect)
covariates,
addition
random
effects
direct
additive
environmental,
permanent
residual.
first
analysis
consisted
single-trait
animal
model,
with
L305
records
(disregarding
HV).
second
considered
classes
standard
deviations
(SD):
two-trait
including
low
high
(considering
HV),
according
standardized
means
for
herd-year
calving.
SD
class
composed
herds
equal
or
less
than
zero
positive
values.
Estimates
(co)variance
components
breeding
values
were
obtained
separately
each
scenario
using
Bayesian
inference
via
Gibbs
sampling.
Different
heritability
estimated.
Higher
DP
(0.20)
(0.15)
breeds,
not
occurring
same
Girolando
breed,
lower
value
among
(0.10).
High
correlations
also
found
between
(0.88;
0.85
0.79)
respectively.
Like
order
(Spearman)
which
three
breeds
analyzed
(equal
above
0.92).
Thus,
presence
HV
had
smaller
impact
did
affect
sires.
Annals of Bangladesh Agriculture,
Год журнала:
2023,
Номер
27(2), С. 161 - 174
Опубликована: Дек. 31, 2023
The
objective
of
this
study
was
to
assess
the
temperature-humidity
index
(THI)
values
in
selected
regions
Bangladesh
for
suitability
ruminant
rearing.
Data
on
monthly
temperatures
and
relative
humidity
were
collected
from
Meteorological
Department
(BMD)
a
27-year
time
period
(1995–2022).
region’s
data
indicated
that
hottest
area
west
central
region
month
June.
In
comparison,
coolest
northwest
January.
had
no
heat
stress
November
February,
mild
March
May
October,
as
well
moderate
June
September.
northeast
region,
occurred
May,
November,
December
February
comfortable,
March,
stress,
April
through
September
region.
east
April,
severe
contrast
which
showed
during
rainy
season,
most
other
seasons
stress.
Thus,
periods
might
vary
depending
regional
meteorological
scenarios.
Animals
faced
(THI
>
72)
or
warning
signal
due
progressive
increase
temperature
indices
over
months
years
investigation.
When
THI
levels
are
high,
especially
July
August,
livestock
farmers
must
emphasize
various
herd
management
techniques
limit
risk
milk
production
quality
concerns,
disease
prevalence,
reproductive
performance.
findings
present
investigation
suggest
mitigation
measures
Bangladeshi
farmers.
Ann.
Agric.
27
(2):
161-174
