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U. S. Department of Commerce American Samoa Government


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Fagatele Bay National Marine Sanctuary




Corals in Fatatele Bay: 2007/8


A total of 2417 coral colonies belonging to 94 species were recorded during surveys in Fagatele Bay in 2007/8. The most common coral in the bay (531 colonies) was Galaxea fascicularis. Three other species were common in the bay and were represented by more than 200 colonies each, including Montipora grisea (368 colonies), Porites lichen (213 colonies), and Porites rus (227 colonies). Most species (67 of 94 species) were numerically rare, and represented by less than 20 colonies (Table 1). In diverse ecosystems, most species are rare. This pattern is similar to that in the 2004 survey.
Coral cover was relatively high in Fagatele Bay based on the belt transect data (64.1% cover, Table 1). However, the numerically abundant corals did not always have the highest percent cover. For example, although Galaxea fascicularis was the most abundant coral in Fagatele Bay, it covered only 2.1% of the area surveyed. In contrast, we recorded only 10 colonies of Acropora clathrata, but it covered 12.7% of the area surveyed. Acropora hyacinthus, Montipora grisea, and Pocillopora eydouxi each had 5-10% cover in the bay (Table 1).
Table 1. Total number of colonies and percent cover of each coral species recorded in Fagatele Bay and Pago Pago Harbor sites in 2007/8.






Fagatele Bay




Pago Pago Harbor




Species

Abundance

% Cover

Abundance

% Cover

Acropora abrotanoides


3

0.7







Acropora austera

18

0.4







Acropora azurea

35

0.7







Acropora cerealis

2

0.05






Acropora clathrata


10

12.7







Acropora crateriformis

64

3.0







Acropora cytherea

6

0.8







Acropora digitate

4









Acropora divaricata


7

0.2







Acropora formosa

1

0.01







Acropora gemmifera

4

0.1







Acropora humilis

6

0.05







Acropora hyacinthus

49

7.5







Acropora “juvenile”

3

0.001






Acropora loripes


1

0.04







Acropora nana

12

0.09







Acropora nasuta

10

0.5







Acropora nobilis

26

3.5







Acropora pagoensis

16

0.3







Acropora palifera

13

0.4







Acropora paniculata

3

0.2







Acropora samoensis

4

0.06






Acropora valida


1

0.001







Acropora spp.

6

0.7

3

0.09

Alveopora sp.

12

0.005







Astreopora microphthalma

1

0.04

1

0.005

Caulastrea furcata

3

0.2







Coscinaraea collumna

1

0.04







Cyphastrea seralia

2

0.2

1

0.0006

Diploastrea heliopora







3

14.1

Echinopora gemmacea

5

0.8







Echinopora hirsutissima

2

0.04







Echinopora lamellosa

3

0.06







Favia pallida

1

0.15







Favia stelligera

2

0.8







Favites abdita

2

0.02







Favites complanata

12

0.3







Fungia concinna

2

0.01







Fungia fungites

3

0.01

6

0.09

Fungia klunzingeri

1

0.01







Fungia scutaria

1

0.01







Galaxea astreata

5

0.15

1

0.0006

Galaxea fascicularis

531

2.1

3

0.02

Gardinoseris planulata







2

0.7

Goniastrea retiformis

44

3.0







Goniastrea sp.

1

0.04







Hydnophora exesa

37

3.5







Hydnophora microconos




0.1






Hydnophora rigida


10

0.06







Leptastrea purpurea

5

0.08







Leptastrea transversa

1

0.04

1

0.09

Leptoria phrygia




0.04

1

0.0006

Leptoseris mycetoseroides

2

0.005







Lobophyllia hemprichii

2

0.04







Merulina ampliata

2

0.08







Merulina scabricula







5

0.2

Millepora dichotoma







8

0.8

Millepora exaesa







2

0.1

Millepora platyphylla







4

0.1

Millepora sp.







9

1.7

Montastrea annuligera

4

0.2







Montastrea curta

21

0.3







Montipora efflorescens

57

1.0

1

0.02

Montipora foveolata

4

0.02







Montipora grisea

368

5.6

80

1.0

Montipora hispida

1

<0.001







Montipora informis

5

0.1

3

0.006

Montipora nodosa

14

0.15






Montipora tuberculosa


5

0.8

4

0.01

Montipora turgescens

9

0.2







Montipora venosa

137

0.5







Montipora sp.

1

0.04







Pavona divaricata







29

0.2

Pavona maldivensis

3

0.08







Pavona varians

76

1.4

78

4.8

Pavona varians “colines”

1

0.04







Pavona venosa

21

0.1







Platygyra dadaelea

3

0.02







Platygyra sinensis

1

0.04







Pocillopora damicornis

5

0.01

53

0.3

Pocillopora eydouxi

87

4.1

2

0.03

Pocillopora meandrina

4

0.1







Pocillopora verrucosa

53

0.5

26

0.5

Pocillopora woodjonesi

9

0.5







Porites annae

2

0.0005







Porites cylindrica

14

0.2







Porites lichen

213

1.3







Porites “mound”

13

0.07

2

0.1

Porites rus

227

2.3

10

0.4

Porites sp.

6

0.003







Porites sp. 2

75

0.2







Porites vaughani

7

0.006







Psammocora contigua

1

0.01

32

0.8

Psammocora sp. 1

1

0.04







Psammocora hameana

3

0.01

3

0.09

Psammocora nierstraszi







1

0.09

Psammocora profundacella

5

0.09

40

0.2

Stylocoeniella armata

7

0.004







Symphyllia radians







1

0.006















Total number of colonies

2417




401




Total number of species

94




31




Overall coral cover

64.1




26.8



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