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  • Original Article
  • Open Access

Follower fish of the goldspotted eel Myrichthys ocellatus with a review on anguilliform fish as nuclear species

  • Maria L. F. Ternes1Email author,
  • Vinicius J. Giglio2, 3,
  • Thiago C. Mendes2, 3 and
  • Pedro H. C. Pereira4, 5
Helgoland Marine Research201872:2

https://doi.org/10.1186/s10152-017-0503-1

Received: 5 July 2017

Accepted: 16 November 2017

Published: 16 January 2018

Abstract

In a nuclear-follower fish foraging association, the follower benefits from food uncovered or flushed out when the nuclear fish disturbs the bottom, while nuclear species generally do not seem to be benefiting. Among nuclear species, eels (anguilliform fish) are known to be one of the most represented groups. Here we investigated the frequency and time duration of foraging associations among the goldspotted eel Myrichthys ocellatus and reef fish in a subtropical marginal reef. In addition, we reviewed nuclear eel species and their followers described in the literature. From a total of 211 goldspotted eels observed, seven follower species were recorded in 19% of the samples. The average time of the following associations per species ranged from 40 to 190 s. Four species were reported for the first time as M. ocellatus followers (Bodianus rufus, B. pulchellus, Stephanolepis hispidus, and Serranus baldwini) and three of them have never been reported in the literature as eel followers (B. pulchellus, S. hispidus, and S. baldwini). The literature describes 13 eel species acting as nuclear for 66 fish species, represented mainly by groupers and sea basses. The size of the eel was not correlated with the size of its follower and neither with the number of described follower species. The nuclear role of eels is likely to be an important component of the trophic ecology of small and medium-sized macrocarnivore fish.

Keywords

Reef fish behaviorSouthwestern AtlanticForaging associationsNuclear and followerReef fishInterspecific associations

Background

Interspecific associations are common in structurally and ecologically complex ecosystems such as coral reefs. Among reef fish, interspecific foraging associations are characterized by the opportunistic joining of individuals from two or more species during feeding [1, 2]. It comprises a “nuclear species” that disturbs the bottom while foraging and exposing potential preys to opportunist or generalist predator species known as “follower” [3]. The nuclear-follower association has been described for a diversity of species that varies from small mobile invertebrate feeders to large piscivores [48]. Considering that this association is relatively common, it is believed to play an important role in the trophic ecology of reef fish [9]. The nuclear-follower association is commensal by benefiting the follower with easier access to inaccessible prey, higher feeding success, lower energy expenditure on foraging, and lower susceptibility to predation [6]. On the other hand, it is hypothesized that nuclear species do not gain benefits from feeding and may even be impaired due to food competition with followers [2]. Nevertheless, nuclear species can benefit from social feeding such as vigilance against predators and avoid that some prey escape. Also, it has been suggested that the nuclear-follower associations can increase the foraging opportunities for both species [10].

Anguilliform fish (hereafter referred to as “eels” for simplicity) are among the most representative nuclear species in the nuclear-follower associations [6, 11]. Eels often forage on clumps of algae, sand banks, and between reef crevices, where they prey on crabs and small fish. Their body shape enables them to access crevices that are inaccessible to most fish [12] and, therefore, they represent potential nuclear species for opportunistic follower fish. However, feeding associations involving eels have only been descriptively investigated despite their potential importance. For instance, it remains unknown whether the body size of nuclear species influences the number of reported followers and whether a particular fish genus is more prone to associate with eels than to other genera.

We investigated the nuclear-follower associations using the goldspotted eel Myrichthys ocellatus as a nuclear species in a subtropical marginal reef. The species is mostly nocturnal, feeds primarily on crabs, although it may also forage during the daytime [13, 14]. Specifically, this study aims to examine the frequency and time of the nuclear-follower associations among reef fish. In addition, we conducted a review on the eel species that have been globally described as nuclear and the number of follower species and then investigated the relationship between the eel body size and the amount and type of follower species.

Methods

Study site

The study was conducted in Arraial do Cabo, southeastern Brazil (22°57′S, 42°01′W). The region consists of an isthmus and three islands dominated by rocky shores. The sites surveyed were mostly composed of coastal rocky reefs with depths of 4–12 m and water temperature of 17–26 °C. This region has major ecological and conservation relevance on the Brazilian coast, as it is the southern distributional limit of some tropical species, with local fauna encompassed by both tropical and temperate species [15, 16].

Data collection and analysis

We conducted underwater observations through scuba diving (ca. 44 h) and snorkeling (ca. 13 h) between April and August 2015. Divers swam along coastal rocky reefs (2–8 m depth) searching for M. ocellatus. When an individual was found, we visually estimated its total length (TL) based on the collector experience in underwater visual census surveys and checked for the presence of any following fish. When an eel was followed by any fish, the observer started to record the duration. The eel observations lasted for five min, in which the behavior was classified as being moving, foraging, or resting. When a follower was present, we estimated its TL and recorded the behavioral interactions, for instance, if it touched a nuclear eel or presented agonistic behavior toward conspecifics to defend an advantageous position next to the eel. Divers maintained a minimum distance of 3 m from the fish to avoid disrupting the behavior of the eel and its followers. The relationship between the size of nuclear and the follower species was assessed with the Spearman rank correlations since the data were nonparametric.

The literature review was conducted through the search tools Scopus and Google Scholar using the words “follower + fish + eel”; “nuclear + follower + reef fish” and “following + behavior”. We included only peer-reviewed literature in the analysis. From the selected papers, we recorded those that mentioned nuclear-follower interaction among eels and fish. The follower species were categorized according to the trophic categories as macrocarnivore, mobile invertebrate feeder, and omnivore [17, 18]. The maximum size of nuclear eel species was described according to Froese & Pauly [19]. The relationships between the maximum body size of nuclear species and (1) the number of follower species, and (2) the maximum body size of nuclear and follower species were assessed by using the Spearman rank correlation.

Results

Followers of Myrichthys ocellatus

A total of 211 sightings of M. ocellatus were recorded. The body size ranged from 30 to 100 cm TL (average = 64 cm ± 6 SE). Most of the specimens recorded were foraging along the reef, disturbing the bottom (92%), and few were resting (8%). The followers were observed to be following 41 eels (i.e., 19% of the observed M. ocellatus had followers), and the overall average time of association was 98 ± 22 s (Table 1). Seven species were recorded as followers, of which four belonged to the family Labridae (Halichoeres brasiliensis, H. poeyi, Bodianus pulchellus, and B. rufus), one to Serranidae (Serranus baldwini), one to Epinephelidae (Mycteroperca acutirostris), and one to Monacanthidae (Stephanolepis hispidus). The most frequently recorded followers were B. rufus (n = 12), S. hispidus (n = 9), and H. brasiliensis (n = 5) (Table 1). Most follower species were mobile invertivores (n = 5 species), with only one species each of macrocarnivore and omnivore.
Table 1

Follower fish of Myrichthys ocellatus recorded in Arraial do Cabo, Brazil

Family

Species (no. of events)

Interaction duration (s)

Mean body size of the nuclear species

Mean body size of the follower species (cm) M. ocellatus

Spearman rank correlation result

Labridae

Halichoeres brasiliensis (7)

69.3 ± 6.1

69 ± 6

27 ± 2

r = 0.7; p = 0.04

Labridae

Halichoeres poeyi (4)

40 ± 12

56 ± 11

16 ± 1

r = 0.25; p = 0.7

Labridae

Bodianus pulchellus (5)

122 ± 24

57 ± 8

19 ± 1

r = 0.36; p = 0.5

Labridae

Bodianus rufus (12)

145 ± 27

69.6 ± 4.1

28.3 ± 0.9

r = 0.07; p = 0.8

Monacanthidae

Stephanolepis hispidus (10)

65 ± 4.2

59 ± 6

24 ± 1

r = 0.54; p = 0.1

Epinephelidae

Mycteroperca acutirostris (1)

190

75

35

*

Serranidae

Serranus baldwini (2)

45 ± 12

68 ± 5

9 ± 2

*

 

All events

96.6 ± 21.4

64 ± 3

25 ± 1

r = 0.42; p = 0.007

* Statistical tests were not done due to the small sample size. P-values in italic are significant. The deviations are standard errors

Overall, the size of M. ocellatus was significantly correlated to the size of its followers (r = 0.42; p = 0.007; Table 1). Among all observed interactions, B. rufus presented the highest number of agonistic interactions toward conspecifics (n = 12 events) and touched M. ocellatus more frequently (n = 6; Table 2). H. brasiliensis and S. baldwini were the only species that did not present agonistic interactions. No agonistic interactions were registered between the nuclear and follower species.
Table 2

Frequency of interactions among follower fish of Myrichthys ocellatus in Arraial do Cabo, Brazil

Species

Behavior

Agonistic against conspecifics

Touch nuclear

Halichoeres brasiliensis

0

2

Halichoeres poeyi

0

0

Bodianus pulchellus

5

3

Bodianus rufus

8

4

Stephanolepis hispidus

3

2

Mycteroperca acutirostris

0

2

Serranus baldwini

5

0

Anguilliform fish as nuclear species

We found 22 studies reported eels as nuclear species, all of which included reef-associated species from the tropical (n = 16) and subtropical (n = 6) shallow reefs. In these papers, 78 nuclear-follower associations were described, in which 13 eel species were recorded as being nuclear (11 species of Muraenidae and two of Ophichthidae), and 66 reef fish species from 17 families were recorded as followers. Most follower species belonged to Epinephelidae (n = 20), followed by Serranidae (n = 10), and Labridae (n = 10; Fig. 1). Considering the trophic category, followers were mostly macrocarnivores (MCAR, n = 33; 53%), followed by mobile invertivore feeders (MINV, n = 18; 29%); roving herbivores (ROVH) and sessile invertivore feeders (SINV) (each with 3 species); planktivores (PLK), and territorial herbivores (TERH) (each with 2 species); and omnivores (OMNI, n = 1; Table 3). Overall, the average number of follower species for each eel species was 5.2 ± 1.3 SE, and the highest number of follower species was reported for M. ocellatus (20 species) and Gymnothorax griseus (16 species; Fig. 2). The relationship between the maximum body size of the anguilliform nuclear species (overall mean: 131 ± 21 cm), and: (1) the number of follower species; and (2) the maximum body size of nuclear and follower species were not significant (r = − 0.02, p = 0.9 and r = 0.2, p = 0.06, respectively).
Figure 1
Fig. 1

Number of fish species described as followers of eels, according to the family, found in 22 peer-reviewed publications

Figure 2
Fig. 2

Relationship between the maximum body size of the eel (total length) and the number of fish follower species described in the literature

Discussion

Followers of Myrichthys ocellatus

This study describes four new species acting as followers of M. ocellatus: Bodianus rufus, B. pulchellus, Serranus baldwini, and Stephanolepis hispidus. The first three species have never been described as followers of anguilliform fish. M. ocellatus possess a suite of adaptations, such as round and elongated body that enables it to move through the reef and explore complex structures like narrow interstices (i.e., crevices, holes, cracks). These features promote M. ocellatus as a potential nuclear species even for small reef fish such as verified herein as also mentioned elsewhere [13, 20]. M. ocellatus is distributed throughout the Atlantic ocean [21] and it is common in Brazilian shallow waters [17, 18, 22]. Given its abundance and its role as nuclear, the species is suggested to have a relevant functional role in the trophic ecology of reef fish through the facilitation of food access and an increase in the feeding success of follower fish [5, 23]. However, the frequency in which the interactions occur was unknown, and surveys only described opportunistic behavioral aspects of the event [13, 14, 20, 24]. To the best of our knowledge, this study presents the first data on duration and frequency (presence x absence) of following interactions with an eel species. Followers of M. ocellatus were relatively common (19% of the individuals observed) and performed short-time opportunistic associations with no more than 190 s. In fact, associations were observed when eels were actively disturbing the bottom to attract the attention of followers.

Comparisons of the size of both the nuclear and follower fish are also missing in the literature. Some studies have only speculated on the relationship between the size of nuclear and the follower fish species [25]. We found a relationship between the size of nuclear and follower to H. brasiliensis and for all species grouped. This can be explained because the amount of disturbance created by the foraging nuclear fish is suggested to influence the size and number of followers [9]. Species that cause a relatively high amount of disturbance such as M. ocellatus [13], are suggested to attract more followers [2].

During the present study, wrasses (Labridae) and filefish (Monacanthidae) were observed following M. ocellatus in pairs, occasionally displaying aggressive behavior toward conspecifics that attempted to join the foraging association. This aggressive behavior (short chases and displacements) aimed to maintain the fish dominance of the advantageous position next to the eel to avoid sharing the benefits of following the nuclear individual with conspecifics [14]. B. rufus was also aggressive toward the diver who was conducting the behavioral observations. Arraial do Cabo is considered as a popular diving site [26]; and this behavior is likely to benefit the nuclear species towards curious divers, especially photographers, who often approach such subjects to take photo [27]. A less frequent interaction observed was the touch by the follower on nuclear species. This type of contact by follower species is suggested to act as a stimulus to the nuclear fish to continue foraging [1, 28].

A previous literature review [13] reported 12 species of followers of M. ocellatus, of which five species were groupers. Nevertheless, in Arraial do Cabo, we recorded only one species of grouper (Mycteroperca acutirostris) in a single event. This low frequency of groupers in following associations may be related to the marked decrease in the abundance of groupers in the region during the last three decades as a consequence of overfishing [29, 30]. Therefore, changes in the fish community caused by anthropogenic activities can be affecting interspecific associations, thereby influencing the reef trophodynamics.

Anguilliform fish as nuclear species

Anguilliform fish are followed by a variety of species, mainly macrocarnivores from the families Epinephelidae and Serranidae (groupers and sea basses), which represent half of the species described so far. These fish are considered to be inquisitive, they display opportunistic feeding behavior, and are known for following a wide range of reef fish species [4, 31, 32], as well as sea stars [33] and octopuses [4]. The main follower species of eels, the coney grouper Cephalopholis fulva is highly opportunistic and has been reported in interspecific feeding associations as a follower [3, 9], mimic [34], or even a preying cleaner species [35]. Remarkably, the four species of roving herbivorous and two territorial herbivorous were described as followers of M. ocellatus and Gymnothorax. Herbivorous are likely to feed on items made available by the nuclear species, such as pieces of algae loosened or unearthed by the nuclear fish [9].

Findings from this survey suggest that size of nuclear species is not a predictor of the number of follower species. The number of follower species is more likely to be related to the active foraging behavior of nuclear species. For instance, M. ocellatus (species with the highest number of followers - Table 3) is a small-sized species (max. 110 cm) which behavior is described as “vigorous and agitated” [13]. This active behavior and the foraging activity increased the amount of disturbance produced by the nuclear species, thereby attracting more followers [5]. In addition, the diversity of habitats where M. ocellatus forage may also explain the high amount of followers verified. This species is known to forage in a diversity of environments, such as rocky/coral reefs, algae-rodolith beds, and sand and mud bottoms; therefore, this is likely to increase the variety of followers [13].
Table 3

Summary of nuclear-follower associations between eels and reef fish found in the literature

Nuclear eel species

Follower species

Trophic

category

Location

Source

Muraenidae

 Gymnothorax castaneus

Balistes verres

MINV

Gulf of California (TEP)

[5]

 Gymnothorax castaneus

Bodianus diplotaenia

MINV

Gulf of California (TEP)

[5]

 Gymnothorax castaneus

Epinephelus labriformis

MCAR

Gulf of California (TEP)

[5]

 Gymnothorax castaneus

Cephalopholis panamensis

MCAR

Gulf of California (TEP)

[5]

 Gymnothorax castaneus

Holacanthus passer

SINV

Gulf of California (TEP)

[5]

 Gymnothorax castaneus

Mycteroperca rosacea

MCAR

Gulf of California (TEP)

[5, 36]

 Gymnothorax castaneus

Rypticus bicolor

MCAR

Gulf of California (TEP)

[5]

 Gymnothorax dovii

Caranx melampygus

MCAR

Malpelo island (TEP)

[7]

 Gymnothorax dovii

Dermatolepis dermatolepis

MCAR

Malpelo island (TEP)

[7]

 Gymnothorax dovii

Aulostomus chinensis

MINB

Malpelo island (TEP)

[7]

 Gymnothorax dovii

Mycteroperca olfax

MCAR

Malpelo island (TEP)

[7]

 Gymnothorax dovii

Seriola rivoliana

MCAR

Malpelo island (TEP)

[7]

 Gymnothorax dovii

Bodianus diplotaenia

MINB

Malpelo island (TEP)

[7]

 Gymnothorax funebris

Carangoides bartholomaei

MCAR

Brazil (SWA)

[4]

 Gymnothorax funebris

Cephalopholis fulva

MCAR

Brazil (SWA)

[4, 37]

 Gymnothorax griseus

Aethaloperca rogaa

MCAR

Red Sea (WEI)

[6]

 Gymnothorax griseus

Cephalopholis argus

MCAR

Red Sea (WEI)

[6]

 Gymnothorax griseus

Cephalopholis hemistiktos

MCAR

Red Sea (WEI)

[6]

 Gymnothorax griseus

Cephalopholis miniata

MCAR

Red Sea (WEI)

[6]

 Gymnothorax griseus

Epinephelus fasciatus

MCAR

Red Sea (WEI)

[6, 28]

 Gymnothorax griseus

Grammistes sexlineatus

MCAR

Red Sea (WEI)

[6]

 Gymnothorax griseus

Parupeneus cyclostomus

MINV

Red Sea (WEI)

[6]

 Gymnothorax griseus

Pterois volitans

MCAR

Red Sea (WEI)

[6, 28]

 Gymnothorax griseus

Scorpaenopsis gibbosa

MCAR

Red Sea (WEI)

[6]

 Gymnothorax griseus

Thalassoma rueppellii

PLK

Red Sea (WEI)

[28]

 Gymnothorax griseus

Variola louti

MCAR

Red Sea (WEI)

[6]

 Gymnothorax javanicus

Epinephelus fasciatus

MCAR

Red Sea (WEI)

[6]

 Gymnothorax javanicus

Plectropomus pessuliferus

MCAR

Red Sea (WEI)

[1]

 Gymnothorax miliaris

Cephalopholis cruentata

MCAR

Caribbean (WEA)

[11]

 Gymnothorax miliaris

Cephalopholis fulva

MCAR

Caribbean (WEA)

[11]

 Gymnothorax miliaris

Rypticus saponaceus

MCAR

Caribbean (WEA)

[11]

 Gymnothorax moringa

Acanthurus bahianus

ROVH

Caribbean (WEA)

[11]

 Gymnothorax moringa

Bodianus rufus

MINV

Caribbean (WEA)

[11]

 Gymnothorax moringa

Cephalopholis cruentata

MCAR

Caribbean (WEA)

[11, 38]

 Gymnothorax moringa

Cephalopholis fulva

MCAR

Caribbean (WEA)

[11]

 Gymnothorax moringa

Chaetodon capistratus

SINV

Caribbean (WEA)

[11]

 Gymnothorax moringa

Holacanthus tricolor

SINV

Caribbean (WEA)

[11]

 Gymnothorax moringa

Scarus taeniopterus

ROVH

Caribbean (WEA)

[11]

 Gymnothorax ocellatus

Diplectrum spp.

MCAR

Brazil (SWA)

[39]

 Gymnothorax ocellatus

Lutjanus spp.

MCAR

Brazil (SWA)

[39]

 Gymnotorax vicinus

Acanthurus coeruleus

ROVH

Brazil (SWA)

[4]

 Gymnotorax vicinus

Carangoides bartholomaei

MCAR

Brazil (SWA)

[4]

 Gymnotorax vicinus

Cephalopholis fulva

MCAR

Brazil (SWA)

[4]

 Gymnotorax vicinus

Haemulon parra

MINV

Brazil (SWA)

[4]

 Gymnotorax vicinus

Halichoeres radiatus

MINV

Brazil (SWA)

[4]

 Gymnotorax vicinus

Pseudupeneus maculatus

MINV

Brazil (SWA)

[4]

 Gymnothorax sp.

Bodianus diplotaenia

MINV

Gulf of California (TEP)

[36]

 Gymnothorax sp.

Epinephelus labriformis

MCAR

Gulf of California (TEP)

[36]

 Muraena pavonina

Caranx latus

MCAR

Brazil (SWA)

[4]

 Muraena pavonina

Cephalopholis fulva

MCAR

Brazil (SWA)

[4]

 Muraena pavonina

Labrisomus conditus

MINV

Brazil (SWA)

[4]

 Muraena lentiginosa

Alphestes immaculatus

MCAR

Mexico (TEP)

[40]

 Muraena lentiginosa

Serranus psittacinus

MINV

Mexico (TEP)

[40]

Ophichthidae

    

 Myrichthys breviceps

Cephalopholis fulva

MCAR

Caribbean (WEA) and Brazil (SWA)

[4, 11, 13, 24]

 Myrichthys breviceps

Epinephelus adscensionis

MCAR

Brazil (SWA)

[41]

 Myrichthys breviceps

Hypoplectrus puella

MCAR

Caribbean (WEA)

[11]

 Myrichthys ocellatus

Acanthurus bahianus

ROVH

Brazil (SWA)

[20]

 Myrichthys ocellatus

Bodianus pulchellus

MINV

Brazil (SWA)

This study

 Myrichthys ocellatus

Bodianus rufus

MINV

Brazil (SWA)

This study

 Myrichthys ocellatus

Epinephelus adscensionis

MCAR

Brazil (SWA)

[13, 24, 41]

 Myrichthys ocellatus

Epinephelus marginatus

MCAR

Brazil (SWA)

[14, 17, 33]

 Myrichthys ocellatus

Halichoeres brasiliensis

MINV

Brazil (SWA)

[13] This study

 Myrichthys ocellatus

Halichoeres poeyi

MINV

Brazil (SWA)

[20] This study

 Myrichthys ocellatus

Halichoeres radiatus

MINV

Brazil (SWA)

[4]

 Myrichthys ocellatus

Labrisomus cricota

MINV

Brazil (SWA)

[20]

 Myrichthys ocellatus

Labrisomus nuchipinnis

MINV

Brazil (SWA)

[20]

 Myrichthys ocellatus

Lutjanus alexandrei

MCAR

Brazil (SWA)

[13]

 Myrichthys ocellatus

Mycteroperca acutirostris

MCAR

Brazil (SWA)

[13] This study

 Myrichthys ocellatus

Mycteroperca bonaci

MCAR

Brazil (SWA)

[24]

 Myrichthys ocellatus

Rypticus bistrispinus

MCAR

Brazil (SWA)

[24]

 Myrichthys ocellatus

Serranus baldwini

MINV

Brazil (SWA)

This study

 Myrichthys ocellatus

Serranus flaviventris

MINV

Brazil (SWA)

[24]

 Myrichthys ocellatus

Stegastes fuscus

TERH

Brazil (SWA)

[20]

 Myrichthys ocellatus

Stegastes variabilis

TERH

Brazil (SWA)

[20]

 Myrichthys ocellatus

Stephanolepis hispidus

OMNI

Brazil (SWA)

This study

 Myrichthys ocellatus

Thalassoma noronhanum

PLK

Brazil (SWA)

[4]

 Myrichthys ocellatus

Ulaema lefroyi

MINV

Brazil (SWA)

[13]

 Myrichthys sp.

Epinephelus fasciatus

MCAR

Red Sea (WEI)

[6]

Acronyms for trophic categories as follows: MCAR macrocarnivore, SINV sessile invertebrate feeder, MINV mobile invertebrate feeder, OMNI omnivore, PLK planktivore, ROVH roving herbivore, TERH territorial herbivore. Nuclear and follower species are listed in ascending alphabetical order. WEA western Atlantic, SWA southwestern Atlantic, TEP tropical eastern Pacific, WEI western Indian

Eels can be followed by groups of fish, as reported for other nuclear fish species [9, 13]. However, the data on the number of followers of eels in a group of fish are rarely available. The ecological implications of this foraging association and how changes in reef fish community structure (e.g., due to overfishing) can influence the frequency and complexity of such interactions remain unclear. Further studies should include quantitative data on foraging association such as duration, the number of followers at the same time, as well as the food intake rates.

Abbreviations

TL: 

total length

cm: 

centimeter

Declarations

Authors’ contributions

MLFT and VJG collected, analysed the data and drafted the manuscript. TCM and PHCP wrote the manuscript. All authors read and approved the final manuscript.

Acknowledgements

We thank Arraial do Cabo marine extractive reserve—ICMBio (through Viviane Lasmar and Rafaela Farias) for research permits and support. VJG was supported by the Brazilian Ministry of Science and Technology (CNPq) and TCM was supported by FAPERJ. We thank RM Bonaldo, the editor and two anonymous reviewers for their valuable comments and suggestions.

Competing interests

The authors declare that they have no competing interests.

Availability of data and materials

All data generated or analyzed during this study are included in this published article.

Consent for publication

Not applicable.

Ethics approval and consent to participate

Not applicable.

Funding

Not applicable.

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Authors’ Affiliations

(1)
Programa de Pós-Graduação em Zoologia, Universidade Estadual de Santa Cruz, Ilhéus, Brazil
(2)
Programa de Pós-Graduação em Ecologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
(3)
Departamento de Biologia Marinha, Reef Systems Ecology and Conservation Lab, Universidade Federal Fluminense, Niterói, Brazil
(4)
Programa de Pós-Graduação em Oceanografia, Universidade Federal de Pernambuco, Recife, Brazil
(5)
Projeto Conservacao Recifal (PCR), Tamandaré, Brazil

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