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Table 1 Mean abundance and percentage occurrence of fish taxa recorded by the ROV and UVCs at the five depth layers

From: Assessing the suitability of a remotely operated vehicle (ROV) to study the fish community associated with offshore gas platforms in the Ionian Sea: a comparative analysis with underwater visual censuses (UVCs)

Taxa

0–6 (m)

12–18 (m)

22–28 (m)

50–56 (m)

70–76 (m)

ROV

UVC

ROV

UVC

ROV

ROV

ROV

Av. Ab.

SE

%O

Av. Ab.

SE

%O

Av. Ab.

SE

%O

Av. Ab.

SE

%O

Av. Ab.

SE

%O

Av. Ab.

SE

%O

Av. Ab.

SE

%O

PLA

 Anthias anthias

2.8

2.8

3.7

1.6

1.5

11.1

38.2

11.3

48.1

86.3

32.7

66.7

106.1

31.0

66.7

378.6

49.8

100.0

443.3

87.6

100.0

 Boops boops

24.4

10.0

22.2

18.8

12.9

33.3

25.2

9.2

25.9

34.4

15.2

37.0

12.7

6.6

18.5

      

 Chromis chromis

29.5

9.2

74.1

44.4

11.4

81.5

29.8

8.7

55.6

36.6

9.5

81.5

24.8

7.7

55.6

42.5

24.5

27.8

   

 Oblada melanura

15.0

8.0

22.2

22.3

8.4

40.7

9.3

5.8

22.2

10.3

6.4

22.2

5.0

3.6

11.1

      

Spicara spp.

2.8

2.8

2.8

8.7

6.1

14.8

7.0

5.7

7.4

12.3

6.6

25.9

1.5

1.5

3.7

      

Trachurus spp.

         

0.0

0.0

3.7

         

PEL

 Pomatomus saltator

            

3.0

2.1

7.4

      

 Sarda sarda

               

4.2

4.2

5.6

   

 Seriola dumerilii

1.5

1.5

7.4

1.5

1.5

7.4

3.0

1.2

29.6

0.4

0.2

14.8

4.2

1.5

33.3

4.4

2.6

16.7

7.6

4.6

33.3

NEC-BEN

 Diplodus annularis

   

0.0

0.0

3.7

               

 Diplodus puntazzo

         

0.0

0.0

3.7

         

 Diplodus sargus

      

0.1

0.1

3.7

0.5

0.3

14.8

0.3

0.3

7.4

      

 Diplodus vulgaris

0.8

0.7

11.1

1.9

1.1

11.1

1.1

0.8

14.8

2.5

1.5

37.0

1.1

0.7

33.3

3.3

1.6

33.3

2.2

2.2

11.1

 Epinephelus aeneus

            

0.0

0.0

3.7

      

 Phycis phycis

               

0.1

0.1

5.6

0.2

0.2

11.1

 Serranus cabrilla

   

0.0

0.0

3.7

      

0.0

0.0

3.7

      

 Serranus scriba

         

0.0

0.0

3.7

         

 Spondyliosoma chantarus

         

3.4

2.4

14.8

0.0

0.0

3.7

0.5

0.4

11.1

   

 Thalassoma pavo

0.7

0.2

44.4

8.6

2.0

81.5

0.6

0.3

29.6

10.9

2.8

85.2

0.2

0.1

7.4

0.1

0.1

5.6

   

CRY

 Coryphoblennius galerita

   

0.1

0.1

7.4

               

 Lipophrys trigloides

   

0.3

0.1

22.2

               

 Murena helena

         

0.0

0.0

3.7

   

0.2

0.1

22.2

   

 Parablennius gattoruggine

0.1

0.1

7.4

0.6

0.2

48.1

   

0.1

0.1

7.4

         

 Parablennius incognitus

   

0.1

0.1

7.4

   

0.1

0.1

11.1

         

 Parablennius pilicornis

   

0.1

0.1

7.4

               

 Parablennius rouxi

         

0.7

0.2

44.4

         

 Parablennius zvonimiri

         

0.4

0.2

25.9

         

 Scorpaena maderensis

   

6.4

0.9

96.3

   

4.2

0.7

85.2

         
  1. PLA Planktivorous fish, PEL Pelagic fish, NEC -BEN Nekto-benthic fish, CRY Crypto-benthic fish, Av. Ab. average abundance, SE standard error, %O percentage occurrence