Critically endangered Spoon-billed Sandpiper: a flagship for a - - PowerPoint PPT Presentation

▶

Jun 18, 2023 318 likes •641 views

Conservation of the Critically endangered Spoon-billed Sandpiper: a flagship for a flyway Nigel Clark Scientific Advisor to the Spoon-billed Sandpiper Task Force Breeding area Autumn Moulting area Wintering area SBS population Mean rate

SLIDE 1

Nigel Clark

Scientific Advisor to the Spoon-billed Sandpiper Task Force

Conservation of the Critically endangered Spoon-billed Sandpiper: a flagship for a flyway

SLIDE 2

SLIDE 3

Autumn Moulting area Wintering area Breeding area

SLIDE 4

SBS population

500 1000 1500 2000 2500 3000 1975 1978 1981 1984 1987 1990 1993 1996 1999 2002 2005 2008 2011 2014 2017

Year Pairs

2000-2800 <1000 400-570 120-200 <100? <10

Mean rate of decline of 26% a year

ZÖCKLER, SYROECHKOVSKIY and ATKINSON (2010) Bird Conservation International, 20, pp 95-111

Projected in 2010

SLIDE 5

Adult survival 0.76
Fledged young/adult/yr 0.305
Recruitment/adult/yr 0.05

Recruitment is much too low

SLIDE 6

2016 First formal population estimate

210-228 pairs

SLIDE 7

Migration sites are being lost

Largest

concentration of migrating SBS at Saemangeum, South Korea - counts of 50 to 200

Land claim in 2006

now fewer than 15

n nearby estuaries

SLIDE 8

Habitat Loss in China

SLIDE 9

Habitat Loss in China

SLIDE 10

Planned land claim along south Jiangsu coast

Location of Tiaozini mudflats and Dongsha shoals, with respect to planned land claim across wider Jiangsu coast (2010-2020)

Piersma et al. (2017) Wang eds. (2012)

SLIDE 11

Area surveyed September 2014 2014 Yellow lines are directions that birds arrive from as the tide rises

Tiaozini

SLIDE 12

Importance of Tiaozini and Dongsha to Great Knot and Bar-tailed Godwit

Foraging range of 18 satellite tracked Bar- tailed Godwit NT (May 2015 – September 2017) (Chan Y .C.) Foraging range of 18 tracked Great Knots EN (April 2015 – September 2017) (Chan Y .C.)

SLIDE 13

Tiaozini land claim is massive 10km

September 2014

SLIDE 14

How important is Tiaozini?

2017 estimate -

closed population method

– 1,476 encounters – 194 with flags – 12.5% flagged – 21 individuals seen

SLIDE 15

10 days survey - marked birds

5 10 15 20 25 20 40 60 80 100 Cumulative number of flagged individuals detected Cumulative number of flag reads

SLIDE 16

How important is Tiaozini?

Model predicts 168 birds at Tiaozini

40% of the

adult world population Too low because: some birds had already migrated

nly 8 of the 15 birds marked there were seen

SLIDE 17

Tiaozini may not be developed (YET!)

October 2017

SLIDE 18

January 2018 all further land claim stopped

SLIDE 19

Land claim not the only issue

Non-native Spartina = No Mudflat

SLIDE 20

Spartina removal by clam fishermen

SLIDE 21

2366 Mist nets + trapping

China widespread hunting

SLIDE 22

2013 HKBS informed Forest Department 147 nets removed by Forest Department police

Mist net removal does have lasting effect

2013 2014 Only 14 nets found 2014

SLIDE 23

Education the key to the future of SBS

The largest SBS in the world made from clam shells by school children

SLIDE 24

SLIDE 25

SLIDE 26

SLIDE 27

China a key stopover

SLIDE 28

Breeding population at Meina has stabilised

SLIDE 29

SLIDE 30

Thank you for listening

If we all work together we will prevent the extinction of this charismatic species

SLIDE 31

Thank you for listening

If we all work together we will prevent the extinction of this charismatic species