Reactions of fishes to two underwater survey tools, a manned submersible and a remotely operated vehicle

Laidig, Thomas E.; Krigsman, Lisa M.; Yoklavich, Mary M.

doi:10.7755/fb.111.1.5

Cited by 22 publications

(26 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In two species (rougheye rockfish, Sebastes aleutianus and shortraker rockfish, S. borealis) a different response was observed depending if the fish was first observed off the seafloor (diving response) or on the seafloor (no response). Similarly, Laidig et al (2013) found that reactions to both manned submersibles and remotely operated vehicles could vary by species, with species that tended to aggregate in the water column having a much stronger reaction to an underwater vehicle than species that were always found near the seafloor. Many other researchers have recorded different reactions to underwater visual platforms by different sizes and species of fish (Lauth et al, 2004;Adams et al, 1995;Trenkel et al, 2004;Stoner et al, 2008).…”

Section: Discussionmentioning

confidence: 95%

“…More recently, underwater imagery has been used in combination with other methods such as acoustics to estimate population abundance of difficult to assess species (Demer et al, 2009;Ressler et al, 2009;Rooper et al, 2010;Jones et al, 2012). To a large degree, all of these applications of underwater visual observations depend on unbiased platforms, including diving to the seafloor, changing the speed or direction of swimming, following the platform, or limited reaction to the platform (Pearcy et al, 1989;Hixon et al, 1991;Krieger and Ito, 1999;Lauth et al, 2004;Lorance and Trenkel, 2006;Laidig et al, 2013), indicating there could be potential biases in abundance estimates associated with fish reactions to the observation platforms during visual surveys.…”

Section: Introductionmentioning

confidence: 97%

See 1 more Smart Citation

Effect of underwater lighting on observations of density and behavior of rockfish during camera surveys

et al. 2015

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 97%

Effect of underwater lighting on observations of density and behavior of rockfish during camera surveys

et al. 2015

View full text Add to dashboard Cite

“…no avoidance or attraction). Laidig et al (2013) reported that 6 and 10% of S. rosaceus near (total n = 134) and on (n = 10) . Both species moved an average distance of 2 to 3 m per reaction.…”

Section: Discussionmentioning

confidence: 99%

“…As with all survey methods, there are several assumptions and sources of uncertainty associated with visual surveys. We have critically evaluated several of these assumptions using similar survey techniques in prior field surveys , Laidig et al 2013. The strip transect method used in our study assumes 100% detection of the target species within the strip.…”

Section: Discussionmentioning

confidence: 99%

Habitat-based predictive mapping of rockfish density and biomass off the central California coast

Wedding

Yoklavich²

2015

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

Understanding the association between components of habitat and fish distribution and abundance is important in order to achieve accurate stock assessments. We developed generalized additive models (GAM) and spatially predictive maps of rockfish abundance at the individual species level using habitat descriptors collected from visual surveys and fine-scale bathy metry. We advanced beyond presence/absence and presence only models to create predictive maps of fish density (100 m −2 ) and biomass (kg 100 m −2 ) for Sebastes rosaceus (rosy rockfish) and S. constellatus (starry rockfish), both common species in commercial and recreational fisheries along the central coast of California. Selected models included co-variables of seafloor depth, complexity, substratum type, and heterogeneity. Predicted density and biomass of both species were highest in areas of complex rock on the continental shelf off Points Lobos and Sur at 50−90 (S. rosaceus) and 80−120 m (S. constellatus) water depth. Our results will be useful both in stock assessments of these data-poor species as well as in allocation of fishing effort, catches, and other space-based management decisions.

show abstract

“…Visual survey methods, including divers and underwater vehicles, are nonlethal and can collect both habitat information and species information (Yoklavich et al 2000(Yoklavich et al , 2007. However biological information is difficult to collect with visual survey methods, and behavioral responses to cameras, divers, and vehicles might bias survey results (Stoner et al 2008;Laidig et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Investigating three sources of bias in hook-and-line surveys: survey design, gear saturation, and multispecies interactions

Kuriyama

Branch

Hicks

et al. 2019

Can. J. Fish. Aquat. Sci.

View full text Add to dashboard Cite

Hook-and-line surveys can be used to estimate population trends in fish species where conventional methods such as trawl, acoustic, visual, or pot surveys cannot be applied. Hook-and-line surveys allow for the collection of biological information, but the resultant indices of abundance may be biased. We designed simulations to address concerns around survey design, hook saturation, and competition among species and found that catch per unit effort (CPUE) declined more slowly than population size across all scenarios. This hyperstability was most prominent when fish were found in high-density patches, and these scenarios have median absolute relative error values roughly three to five times greater than those with more even distributions of fish density. Despite hyperstability, the surveys still had statistical power to detect changes in abundance. Interspecific competition for hooks caused bias in survey results when one species was more aggressive than another. Taken together, our results indicate hook-and-line surveys fill a niche in survey methodologies, but their use and interpretation can be challenged by hyperstability and competition among species.Résumé : Les relevés à la ligne peuvent être utilisés pour estimer les tendances démographiques d'espèces de poissons quand des méthodes traditionnelles comme les relevés acoustiques, visuels, au chalut et au casier ne peuvent être employées. Si les relevés à la ligne permettent la collecte de renseignements biologiques, les indices d'abondance en découlant peuvent être biaisés. Nous avons conçu des simulations pour examiner les problèmes potentiels entourant la conception des relevés, la saturation des hameçons et la concurrence entre espèces et avons constaté que les captures par unité d'effort (CPUE) baissent plus lentement que la taille de la population pour tous les scénarios. Cette hyperstabilité est la plus prononcée quand les poissons se trouvent dans des groupements de haute densité, ces scénarios présentant des valeurs absolues médianes de l'erreur relative environ trois à cinq fois supérieures aux valeurs associées à des répartitions plus uniformes de la densité de poissons. Malgré l'hyperstabilité, les relevés ont la capacité statistique de détecter des variations d'abondance. La concurrence entre espèces pour les hameçons cause un biais dans les résultats des relevés quand une espèce est plus agressive qu'une autre. Collectivement, nos résultats indiquent que les relevés à la ligne ont leur place parmi les méthodes de relevé, mais que l'hyperstabilité et la concurrence entre espèces peuvent compliquer leur utilisation et l'interprétation des résultats qui en découlent. [Traduit par la Rédaction]

show abstract

Reactions of fishes to two underwater survey tools, a manned submersible and a remotely operated vehicle

Cited by 22 publications

References 20 publications

Effect of underwater lighting on observations of density and behavior of rockfish during camera surveys

Effect of underwater lighting on observations of density and behavior of rockfish during camera surveys

Habitat-based predictive mapping of rockfish density and biomass off the central California coast

Investigating three sources of bias in hook-and-line surveys: survey design, gear saturation, and multispecies interactions

Contact Info

Product

Resources

About