Results 31 to 40 of about 873 (157)

The Diversity of Reef Fish in Ulee Kareung waters, Bireuen District Indonesia

Jurnal Biodjati, 2022
Indonesia has abundant underwater natural resources, including coral reefs. Among coral reef ecosystems, reef fish make an important contribution to supporting the sustainability of underwater life.
Dedi Fazriansyah Putra, Muhammad Redha Subqi, Muhammad Nasir, Syahrul Purnawan, Ichsan Setiawan, Elzein Muhammed Fahal   +5 more
doaj   +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

How many fish? Comparison of two underwater visual sampling methods for monitoring fish communities [PDF]

PeerJ, 2018
Background Underwater visual surveys (UVSs) for monitoring fish communities are preferred over fishing surveys in certain habitats, such as rocky or coral reefs and seagrass beds and are the standard monitoring tool in many cases, especially in protected
Zoi Thanopoulou, Maria Sini, Konstantinos Vatikiotis, Christos Katsoupis, Panayiotis G. Dimitrakopoulos, Stelios Katsanevakis   +5 more
doaj   +2 more sources

Measuring the Efficiency of Alternative Biodiversity Monitoring Sampling Strategies

Frontiers in Marine Science, 2022
Monitoring is a crucial tool for measuring the progress and success of environmental policies and management programs. While many studies have evaluated the effectiveness of biodiversity sampling methods, few have compared their efficiency, which is ...
Gema Hernan, Alexandra K. Dubel, Jennifer E. Caselle, David J. Kushner, Robert J. Miller, D. C. Reed, Joshua L. Sprague, Andrew Rassweiler   +7 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

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

Rocky reef fish assemblage structure in coastal islands of Southern Brazil

Frontiers in Marine Science, 2015
Rocky reef fish assemblage structure in seven coastal islands of Southern Brazil was characterized by underwater visual census (20 m x 2 m transect method 40 m2), average depth of six meters, to obtain density (fish/40 m2) and biomass (grams/40 m2). Fish
Felippe A Daros, Leonardo S Bueno, Marcelo Soeth, Athila A Bertoncini, Mauricio Hostim-Silva, Alberto T Correia, Alberto T Correia   +6 more
doaj   +1 more source

Perceptions of trends in Seychelles artisanal trap fisheries: comparing catch monitoring, underwater visual census and fishers' knowledge [PDF]

Environmental Conservation, 2011
SUMMARYFisheries scientists and managers are increasingly engaging with fishers’ knowledge (FK) to provide novel information and improve the legitimacy of fisheries governance. Disputes between the perceptions of fishers and scientists can generate conflicts for governance, but can also be a source of new perspectives or understandings.
Daw, Tim M., Robinson, Jan, Graham, Nicholas A.J.   +2 more
openaire   +4 more sources

OCCURRENCE STUDY OF BLACKTIP REEF SHARK (Carcharhinus melanopterus) IN THE WATERS OF GILI PETELU, EAST LOMBOK DISTRICT

Jurnal Teknologi Perikanan dan Kelautan
Gili Petelu is one of the aggregation sites for marine species such as blacktip reef sharks. This study aims to determine the habitat characteristics of blacktip reef sharks in the waters of Gili Petelu, East Lombok Regency.
Rahman Jayawangsa, Chandrika Eka Larasati, Mahardika Rizqi Himawan, Muhammad Tezar Rafandi   +3 more
doaj   +1 more source

Automated object detection based on YOLOv11 for monitoring benthic population dynamics: A new approach combining photogrammetry and open‐source GIS tools applied to sea cucumbers

Remote Sensing in Ecology and Conservation, EarlyView.
This research established a new object detection model based on YOLOv11 to recognise benthic organisms, specifically sea cucumbers, by utilising high‐resolution photogrammetric‐based orthomosaics acquired along infralittoral Mediterranean Sea beds. The model demonstrated impressive performance metrics and, when combined with the Deepness plugin for the
Gian Mario Sangiovanni, Giovanna Jona Lasinio, Daniele Poggio, Gianluca Mastrantonio, Alessio Pollice, Arnold Rakaj, Midhun Mohan, Stefano Moro, Edoardo Casoli, Daniele Ventura   +9 more
wiley   +1 more source