Does the colors of light matter? Testing different light color in nocturnal underwater visual censuses

Lucena, Marcos B.; Mendes, Thiago C.; Barbosa, Moysés Cavichioli; Cordeiro, César A. M. M.; Eggertsen, Linda; Ferreira, Carlos E. L.

doi:10.1016/j.marenvres.2021.105261

Cited by 7 publications

(2 citation statements)

References 36 publications

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“…Cabled observatory imaging equipment could have some monitoring footprint on coastal areas for the introduction of light at nocturnal image sampling, which can induce behavioral disturbance on the local fauna (e.g., Davies et al, 2015;Kurvers et al, 2018;Czarnecka et al, 2019;Lucena et al, 2021). Nevertheless, in our case it is unlikely that the OBSEA lightening system, active every 30 min for about 3 s, affected the reported Dentex count patterns, being the individuals of this species absent at nighttime all the yearlong (see previous Section).…”

Section: Limitations In Cabled Observatory Monitoring Strategiesmentioning

confidence: 84%

Long-Term Monitoring of Diel and Seasonal Rhythm of Dentex dentex at an Artificial Reef

et al. 2022

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Behavioral rhythms are a key aspect of species fitness, since optimize ecological activities of animals in response to a constantly changing environment. Cabled observatories enable researchers to collect long-term biological and environmental data in real-time, providing relevant information on coastal fishes’ ecological niches and their temporal regulation (i.e., phenology). In this framework, the platform OBSEA (an EMSO Testing-Site in the NW coastal Mediterranean) was used to monitor the 24-h and seasonal occurrence of an ecologically iconic (i.e., top-predator) coastal fish species, the common dentex (Dentex dentex). By coupling image acquisition with oceanographic and meteorological data collection at a high-frequency (30 min), we compiled 8-years’ time-series of fish counts, showing daytime peaks by waveform analysis. Peaks of occurrence followed the photophase limits as an indication of photoperiodic regulation of behavior. At the same time, we evidenced a seasonal trend of counts variations under the form of significant major and minor increases in August and May, respectively. A progressive multiannual trend of counts increase was also evidenced in agreement with the NW Mediterranean expansion of the species. In GLM and GAM modeling, counts not only showed significant correlation with solar irradiance but also with water temperature and wind speed, providing hints on the species reaction to projected climate change scenarios. Grouping behavior was reported mostly at daytime. Results were discussed assuming a possible link between count patterns and behavioral activity, which may influence video observations at different temporal scales.

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Section: Limitations In Cabled Observatory Monitoring Strategiesmentioning

confidence: 84%

Long-Term Monitoring of Diel and Seasonal Rhythm of Dentex dentex at an Artificial Reef

et al. 2022

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“…No Brasil, adultos da espécie foram registrados na cadeia Vitoria-Trindade e Ilhas da Trindade e Martin Vaz (Espírito Santo), Rio de Janeiro e São Paulo (Menezes, 2011;Monteiro Neto et al, 2013;Pinheiro et al, 2015;Lucena et al, 2021). Larvas da espécie foram registradas na região nordeste, entre os estados do Rio Grande do Norte, Paraíba e Pernambuco (Santana et al, 2020), e na Bahia e Espírito Santo, incluindo a Cadeia Vitória-Trindade (Bonecker & Castro, 2006).…”

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