A comparison of temperate reef fish assemblages recorded by three underwater stereo-video techniques

Watson, Dianne L.; Harvey, Euan S.; Anderson, Marti J.; Kendrick, Gary A.

doi:10.1007/s00227-005-0090-6

Cited by 292 publications

(253 citation statements)

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“…These include the potential inflation of density estimates due to fish being drawn from outside visible sampling areas, unknown areas of attraction as a byproduct of variable bait plume dispersion, alteration of fish behaviors, competitive exclusion, and/or preferential sampling of predator and scavenger populations with corresponding reductions to other functional groups (Harvey et al, 2007;Colton and Swearer, 2010;Dorman et al, 2012). However, comparisons between baited and unbaited camera stations have shown that while carnivore and scavenger abundances tend to increase in the presence of bait, no commensurate changes are typically detected in herbivore or omnivore abundances (Watson et al, 2005;Harvey et al, 2007). The lack of bait-induced declines among non-carnivorous functional groups could be explained by possible "sheep effects, " whereby species not directly attracted to bait plumes are attracted to the feeding activities of others around BRUVS, or conspecific social attraction behaviors (Watson et al, 2005(Watson et al, , 2010Harvey et al, 2007;Dorman et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

“…However, comparisons between baited and unbaited camera stations have shown that while carnivore and scavenger abundances tend to increase in the presence of bait, no commensurate changes are typically detected in herbivore or omnivore abundances (Watson et al, 2005;Harvey et al, 2007). The lack of bait-induced declines among non-carnivorous functional groups could be explained by possible "sheep effects, " whereby species not directly attracted to bait plumes are attracted to the feeding activities of others around BRUVS, or conspecific social attraction behaviors (Watson et al, 2005(Watson et al, , 2010Harvey et al, 2007;Dorman et al, 2012). Finally, underwater sampling visibility was, in general, much higher than the required BRUVS sampling minimum (7 m), even in mesophotic depths to 100 m. While the authors detected no depth-associated, functional group or species-level behavior alterations as a result of reduced light attenuation in deeper strata, coral reef fishes are known to exhibit behavioral shifts in response to varying light levels, which merits additional consideration for future mesophotic research (Rickel and Genin, 2005).…”

Section: Discussionmentioning

confidence: 99%

“…Each BRUVS was deployed for a 60 min sampling period (Watson et al, 2005;Bernard and Götz, 2012), using ∼800 g of Pacific saury/Japanese sanma (Cololabis saira) pulped into a wire mesh basket 1.2 m in front of the stereo-cameras. We selected C. saira because it is locally available and functionally similar to the more commonly used pilchard (Sardinops sagax), as both are oily soft-fleshed fishes widely used by fishers as attractants.…”

Section: Sampling Designmentioning

confidence: 99%

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Mesophotic Depth Gradients Impact Reef Fish Assemblage Composition and Functional Group Partitioning in the Main Hawaiian Islands

2017

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Mesophotic coral ecosystem (MCE) research has increased considerably in recent years, as MCEs may provide partial insulation from the effects of climate change, localized anthropogenic stressors, and may dampen fishing pressures for target species depleted in shallower waters. However, few studies have examined coral reef fish assemblages and functional groups across shallow water to mesophotic depth gradients. In the Main Hawaiian Islands, we investigated coral reef fish communities between 0 and 100 m using baited remote underwater stereo-video. While significant community shifts were detected when transitioning from shallow water to mesophotic depths, relative abundance and species richness remained highest between 0 and 30 m. Mobile invertivores and generalist macropiscivores were exceptions, recording higher abundance and richness values in deeper waters. Depth, habitat complexity, and percent cover of unconsolidated sediment and macroalgae were the main reef fish community drivers in multivariate regression and distance-based linear models. Finally, several target species were more abundant and/or larger in deeper waters, suggesting stock assessment and resource management strategies are incomplete without the incorporation of mesophotic portions of stocks.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Sampling Designmentioning

confidence: 99%

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Mesophotic Depth Gradients Impact Reef Fish Assemblage Composition and Functional Group Partitioning in the Main Hawaiian Islands

2017

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“…The monitoring by underwater video has been demonstrated as an effi cient and non-destructive tool for studying fi sh abundance and behaviour (Fox and Bellwood 2008, Layton and Fulton 2014, Noble et al 2014, Pink and Fulton 2015. Different video systems exist such as baited remote underwater video (BRUV) (Watson et al 2005, Cappo et al 2007, Lowry et al 2012, diver operated video (DOV) (Hall andHanlon 2002, Langlois et al 2010), cabled video observatories , and unbaited, remote underwater video (RUV) (Pelletier et al 2012). The latter was used in this study to monitor the diurnal rhythms of two coastal fi sh species in coralligenous habitats.…”

Section: Introductionmentioning

confidence: 99%

Temporal partitioning of diurnal behavioural patterns of Coris julis and Diplodus vulgaris (Actinopterygii: Perciformes) in Mediterranean coralligenous habitats

Witkowski¹,

Vion²,

Bouchoucha³

2016

Acta Ichthyol. Piscat.

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Background. There is need for more information on behavioural rhythms of fi shes in relation to their habitat use in few or not previously monitored areas, such as coralligenous habitats. Some studies have compiled inventories of observable fi sh species in this habitat, but no studies have been performed on the temporal patterning of fi sh behaviour, especially at the scale of the day. The presently reported study aims at providing knowledge on fi nescale fl uctuations of abundances and behaviour of two fi sh species in coralligenous habitats throughout the diurnal period. Materials and methods. Fish fauna was fi lmed hourly, for several days, from dusk to dawn, with autonomous, programmable, and rotating video systems. Diurnal variations in abundances per count, considering size classes and behaviour, were studied for two diurnal fi sh species-the Mediterranean rainbow wrasse, Coris julis (Linnaeus, 1758) (Labridae), and the common two-banded seabream, Diplodus vulgaris (Geoffroy Saint-Hilaire, 1817) (Sparidae) in two study areas of coralligenous habitats on the French Riviera.Results. Signifi cant temporal variability at the scale of the hour was revealed for abundances of C. julis in one of the two study areas, with few individuals in crepuscular periods and highest abundances in the morning and in the afternoon. These differences were mainly due to signifi cant diurnal variations in abundances of small and medium C. julis, which were low in crepuscular periods, whereas large-sized individuals were equally abundant during the day. On the other hand, no discernible diurnal rhythmicity of mean abundances of D. vulgaris was observed, regardless of the study area. Crepuscular periods were associated with sudden changes of abundances and behaviour for both species, with a greater percentage of mobile and solitary individuals, and few feeding individuals compared to the rest of the day. Feeding occurred mainly in the morning for C. julis. In contrast, no dial-time preference for feeding was revealed for D. vulgaris. Conclusions. The study provided preliminary insights into fi ne-scale diurnal variations of abundances of different life stages and of fi sh behaviour. Variability in abundances of life stages and of fi sh behaviours at different times of day should be taken into account for population assessments and spatial comparisons. Moreover, our study confi rmed the use of video-imaging as an effi cient non-destructive tool for the study of fi sh fauna in structurally complex, highly valuable habitats.

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“…Similarity percentage (SIMPER) analyses were used for each sampling method separately to identify which species contributed to differences in fish assemblage structure between the inner and outer side of the marinas. The criterion for considering a species a good discriminator was based on dissimilarity to standard deviation ratios (Diss/SD) close to 1 and percentage contributions >5% (Watson et al 2005).…”

Section: Discussionmentioning

confidence: 99%

Marinas as habitats for nearshore fish assemblages: comparative analysis of underwater visual census, baited cameras and fish traps

et al. 2017

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Summary:Understanding the ecological role that artificial structures might play on nearshore fish assemblages requires the collection of accurate and reliable data through efficient sampling techniques. In this work, differences in the composition and structure of fish assemblages between the inner and outer sides of three marinas located in the temperate northern-eastern Atlantic Ocean were tested using three complementary sampling techniques: underwater visual censuses (UVC), baited cameras (BCs) and fish traps (FTs). UVCs and BCs recorded a comparable number and relative abundance of species, which in turn were much greater than those recorded by FTs. This finding supports the use of UVCs and BCs over FTs for broad ecologically studies, especially when dealing with structurally complex habitats such as artificial structures. We found differences in fish assemblage structure between the inner and outer sides of marinas, independently of the sampling method. Four small-sized species (Similiparma lurida, Thalassoma pavo, Sarpa salpa and Symphodus roissali) associated with structurally complex vegetated habitats dominated, in terms of abundance, the outer sides of marinas; Diplodus vulgaris, Diplodus sargus and Gobius niger, species with high ecological plasticity in habitat requirements, dominated the inner sides of marinas. The information provided in this study is of great interest for developing sound monitoring programmes to ascertain the effects of artificial structures on fish communities. Keywords: coastal development; marinas; habitat loss; fish assemblages; sampling methods; sampling efficiencies.Los puertos deportivos como hábitats para comunidades de peces litorales: análisis comparativo de censos visuales, cámaras con cebo y trampas para peces Resumen: La comprensión de papel ecológico que las estructuras artificiales pueden desempeñar en las comunidades de peces litorales requiere la recolección de datos precisos y fiables, a través de técnicas de muestreo eficientes. En este trabajo, las diferencias en la composición y estructura de los poblamientos de peces entre las caras interior y exterior de tres puertos deportivos situados en el océano septentrional Atlántico templado se investigaron mediante tres técnicas de muestreo complementarias: censos visuales (UVC), cámaras con cebo (BC) y trampas para peces (FT). UVC y BC registraron un número comparable de especies y abundancias relativas, que fueron mucho mayores que las registradas por FT. Esta mayor cantidad de datos recogidas apoya el uso de estas técnicas sobre FT en estudios ecológicos, especialmente cuando se trata de hábitats de elevada complejidad estructural como el caso de estructuras artificiales. Encontramos diferencias en los poblamientos de peces entre las caras interior y exterior de los puertos deportivos, independientemente del método de muestreo. Cuatro especies de pequeño tamaño (Similiparma lurida, Thalassoma pavo, Sarpa salpa and Symphodus roissali), asociadas a hábitats vegetales estructuralmente complejos, dominaron, en térmi...

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A comparison of temperate reef fish assemblages recorded by three underwater stereo-video techniques

Cited by 292 publications

References 32 publications

Mesophotic Depth Gradients Impact Reef Fish Assemblage Composition and Functional Group Partitioning in the Main Hawaiian Islands

Mesophotic Depth Gradients Impact Reef Fish Assemblage Composition and Functional Group Partitioning in the Main Hawaiian Islands

Temporal partitioning of diurnal behavioural patterns of Coris julis and Diplodus vulgaris (Actinopterygii: Perciformes) in Mediterranean coralligenous habitats

Marinas as habitats for nearshore fish assemblages: comparative analysis of underwater visual census, baited cameras and fish traps

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