To stay or go: movement, behavior, and habitat use of shortfin mako sharks (Isurus oxyrinchus) in the Gulf of Mexico
Frontiers in Marine Science,
Год журнала:
2025,
Номер
12
Опубликована: Май 26, 2025
Shortfin
mako
sharks
(
Isurus
oxyrinchus
)
are
apex
predators
in
marine
ecosystems,
yet
the
North
Atlantic
stock
has
declined
drastically.
Despite
their
imperiled
status,
limited
research
focused
on
movement
and
habitat
use
of
mature
individuals
Gulf
Mexico
(also
known
as
America;
hereafter
Gulf),
a
region
hypothesized
to
serve
gestation
parturition
grounds.
From
2016
2021,
21
(90%
or
nearing
maturity)
were
satellite-tagged
northwestern
evaluate
suitability,
move
persistence,
environmental
drivers
influencing
these
patterns.
This
study
revealed
year-round
Gulf,
particularly
west
central
stem
Mississippi
River
delta
(~89.1°W),
identifying
this
area
previously
unrecognized
important
habitat.
Mako
exhibited
resident
behavior
productive
shelf
shelf-slope
waters
at
sea
surface
temperatures
(SSTs)
between
19.6°C
26°C,
while
transiting
was
observed
SSTs
>26°C
migration
corridors,
such
Loop
Current,
during
movements
through
Yucatán
Channel
Straits
Florida.
These
findings
highlight
intra-population
variability
emphasize
need
manage
highly
migratory
species
ocean-basin
scale.
Developing
spatially
explicit
models
that
incorporate
regional
connectivity
will
be
essential
for
improving
management
strategies
rebuilding
efforts
vulnerable
species.
Язык: Английский
INFLUENCE OF SEA SURFACE TEMPERATURE AND CHLOROPHYLL-A ON MACKEREL PRODUCTIVITY IN BANTEN BAY, INDONESIA: ANALYSIS USING AQUA MODIS DATA (2014–2023)
Geographia Technica,
Год журнала:
2024,
Номер
20(1/2025), С. 44 - 63
Опубликована: Дек. 26, 2024
Banten
Bay,
located
in
Province
near
Java
Island's
northwestern
tip,
supports
abundant
mackerel
populations
(Rastrelliger
sp.),
a
primary
fishing
commodity
impacting
coastal
communities'
livelihoods.Mackerel
migratory
patterns
are
sensitive
to
oceanographic
conditions,
making
them
indicators
of
marine
ecosystem
health.This
study
investigates
the
impact
these
conditions
on
catches
Bay
waters
using
Aqua
Moderate
Resolution
Imaging
Spectroradiometer
(Aqua
MODIS)
data
from
2014
2023,
combined
with
catch
records
Nusantara
Fishery
Harbor
(NFH)
Karangantu
and
analyzed
Generalized
Additive
Model
(GAM).The
results
indicate
increased
productivity,
particularly
during
west
season
(October
December),
coinciding
upwelling-driven
Chlorophyll-a
(Chl-a)
rises.Sea
Surface
Temperature
(SST)
distribution
analysis
revealed
seasonal
fluctuations
(29.33°C
-31.32°C),
supporting
aggregation
warmer
waters.Chl-a
levels
peaked
upwelling
seasons,
enhancing
food
availability.Sea
depth
showed
successful
at
depths
around
50-60
m.GAM
confirmed
SST
Chl-a
as
significant
factors,
having
dominant
influence.The
effect
best-explained
provides
insights
for
sustainable
fisheries
management.
Язык: Английский