Results 31 to 40 of about 2,488,897 (180)

Baited remote underwater video survey of reef fish in the Stilbaai marine protected area, with an assessment of monitoring requirements [PDF]

, 2012
Includes abstract.Includes bibliographical references.Long-term monitoring of changes in species abundance and community composition within marine protected areas (MPAs) is essential to assess whether conservation goals are being reached.
De Vos, Lauren
core   +1 more source

The influence of habitat complexity on fish assemblages associated with extractive platforms in the central Mediterranean Sea

Advances in Oceanography and Limnology, 2018
In this work the influence of habitat complexity on fish assemblages associated with extractive platforms in the Mediterranean Sea was investigated. More specifically, at large spatial scale we tested the differences in fish assemblage between 4-legs vs ...
Pierpaolo Consoli, Maria Cristina Mangano, Gianluca Sarà, Teresa Romeo, Franco Andaloro   +4 more
doaj   +1 more source

Seasonal changes in fish assemblage structure at a shallow seamount in the Gulf of California [PDF]

PeerJ, 2016
Seamounts have generally been identified as locations that can promote elevated productivity, biomass and predator biodiversity. These properties attract seamount-associated fisheries where elevated harvests can be obtained relative to surrounding areas.
Salvador J. Jorgensen, A. Peter Klimley, Arturo Muhlia-Melo, Steven G. Morgan   +3 more
doaj   +2 more sources

Tropical marine fish from Celukan Bawang Port, Buleleng, Bali, Indonesia [PDF]

E3S Web of Conferences, 2021
Celukan Bawang port is located in Buleleng Regency, Bali, Indonesia. The area of Celukan Bawang Port has a coral reef ecosystem that is very rarely found in Indonesian ports. The coral reef has an important role for coral reef fish as their habitat. This
Aulia Rizkyanti, Hanifa Riskha, Arfiantinosa Nassa, Mahmudi Aris, Huda Mohamad Nurul   +4 more
doaj   +1 more source

A comparison of underwater visual distance estimates made by scuba divers and a stereo-video system: implications for underwater visual census of reef fish abundance

Marine and Freshwater Research, 2004
Underwater visual census of reef fish by scuba divers is a widely used and useful technique for assessing the composition and abundance of reef fish assemblages, but suffers from several biases and errors. We compare the accuracy of underwater visual estimates of distance made by novice and experienced scientific divers and an underwater stereo-video ...
Euan Harvey, David Fletcher, Mark R. Shortis, Gary A. Kendrick   +3 more
openaire   +2 more sources

Detection of spatial variability in relative density of fishes:comparison of visual census, angling, and baited underwater video [PDF]

Marine Ecology Progress Series, 2000
The ability to make accurate estimates of fish relative abundance is the basis of both ecological and environmental effects studies, and flawed sampling methods may give misleading results even in otherwise well-designed surveys. This paper compares surveys of snapper Pagrus auratus (Sparidae) and blue cod Parapercis colias (Pinguipedidae) conducted ...
Willis, Trevor J, Millar, Russell B., Babcock, Russell C.   +2 more
openaire   +2 more sources

Performance of a baited underwater video system vs. the underwater visual census technique in assessing the structure of fish assemblages in a Mediterranean marine protected area

Mediterranean Marine Science, 2021
Accurate, rapid and cost-effective fish assemblage monitoring is fundamental for marine protected area (MPA) management as a pivotal tool to verify whether and to what extent MPA conservation objectives have been achieved and to redefine these objectives in the framework of an adaptive management. Recently, there has been a sharp increase in the number
GABRIELLA LA MANNA, IVAN GUALA, DANIELE GRECH, FRANCESCO PERRETTI, FABIO RONCHETTI, MICHELE MANGHI, ALBERTO RUIU, GIULIA CECCHERELLI   +7 more
openaire   +3 more sources

SotonAUV: the design and development of a small, manoeuvrable autonomous underwater vehicle [PDF]

, 2008
The University of Southampton's entry into the Student Autonomous Underwater Challenge-Europe (SAUC-E) 2007 was a custom designed and built autonomous underwater vehicle (AUV) named 'SotonAUV'.
Sharkh, S.M., Phillips, A., M Furlong, J Akhtman, Turnock, S.R., Furlong, M., A Phillips, SM Sharkh, SR Turnock, Akhtman, J., Palmer, A., Phillips, A.B., A Palmer   +12 more
core   +1 more source

Effect of underwater visual survey methodology on bias and precision of fish counts: a simulation approach [PDF]

PeerJ, 2018
Bias in underwater visual census has always been elusive. In fact, the choice of sampling method and the behavioural traits of fish are two of the most important factors affecting bias, but they are still treated separately, which leads to arbitrarily ...
Miguel Pessanha Pais, Henrique N. Cabral
doaj   +2 more sources

Colour reconstruction of underwater images [PDF]

, 2017
Objects look very different in the underwater environment compared to their appearance in sunlight. Images with correct colouring simplify the detection of underwater objects and may allow the use of visual SLAM algorithms developed for land-based robots
Wojciech Kowalczyk, Kowalczyk, Wojciech, Julian Hoth, Hoth, Julian   +3 more
core   +1 more source