{"id":15860,"date":"2017-04-04T21:45:33","date_gmt":"2017-04-04T21:45:33","guid":{"rendered":"http:\/\/coralreefpalau.org\/?page_id=15860"},"modified":"2017-07-23T06:23:36","modified_gmt":"2017-07-22T21:23:36","slug":"stereo-video","status":"publish","type":"page","link":"https:\/\/coralreefpalau.org\/research\/imagery-technology\/stereo-video\/","title":{"rendered":"Stereo Video"},"content":{"rendered":"
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Stereo-video systems are mainly used in two different applications for quantifying the abundance and size of fish. The diver-operated stereo-video system (stereo-DOV) is used by divers swimming transects so that fish counts can be done more quickly and the survey area can be standardised. The other common use is with a baited remote underwater video station (stereo-BRUV) which is deployed from a boat and can be used to survey deep waters and also useful for attracting predatory fish that can be shy of divers such as sharks.[\/vc_column_text][\/qode_elements_holder_item][\/qode_elements_holder][\/vc_column][\/vc_row][vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”full_width” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern”][vc_column][qode_elements_holder number_of_columns=”two_columns” switch_to_one_column=”1000″][qode_elements_holder_item item_padding=”20px 9% 30px 9%” advanced_animations=”no”][vc_single_image image=”15753″ img_size=”full” qode_css_animation=”” css=”.vc_custom_1491176500169{margin-bottom: 25px !important;}”][vc_column_text]<\/p>\n
The ability to rapidly collect data on fish abundance and size makes the use of stereo-video a useful method for studying fish spawning aggregations. As only reproductively active fish participate in the aggregation, we are investigating if size of fish that are aggregating can provide an accurate indicator of the size of maturity.[\/vc_column_text][\/qode_elements_holder_item][qode_elements_holder_item item_padding=”0px 0px 0px 0px” advanced_animations=”no”][vc_single_image image=”16215″ img_size=”full” qode_css_animation=””][\/qode_elements_holder_item][\/qode_elements_holder][\/vc_column][\/vc_row][vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”full_width” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern” background_color=”#ffffff”][vc_column][qode_elements_holder number_of_columns=”two_columns” switch_to_one_column=”1000″][qode_elements_holder_item item_padding=”0px 0px 0px 0px” advanced_animations=”no”][vc_single_image image=”16212″ img_size=”full” qode_css_animation=””][\/qode_elements_holder_item][qode_elements_holder_item item_padding=”20px 9% 30px 9%” advanced_animations=”no”][vc_single_image image=”15753″ img_size=”full” qode_css_animation=”” css=”.vc_custom_1491176500169{margin-bottom: 25px !important;}”][vc_column_text]<\/p>\n
We use a compact stereo-video camera to film fish catches during unloading at the fish market and at other fish landing sites. The camera provides a fast way to record the species composition and size of fish with minimal disruption to the market and fishers. As there are 100\u2019s of fish species landed, having images to identify fish to species level is very useful. The size of fish is needed for fishery stock assessments.[\/vc_column_text][\/qode_elements_holder_item][\/qode_elements_holder][\/vc_column][\/vc_row][vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”full_width” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern”][vc_column][qode_elements_holder number_of_columns=”two_columns” switch_to_one_column=”1000″][qode_elements_holder_item item_padding=”20px 9% 30px 9%” advanced_animations=”no”][vc_single_image image=”15753″ img_size=”full” qode_css_animation=”” css=”.vc_custom_1491176500169{margin-bottom: 25px !important;}”][vc_column_text]<\/p>\n
The use of video saves time when recording the benthic habitat and provides a permanent record of the condition of the reef. This is especially important on deep \u2018mesophotic\u2019 reefs where dive time is very limited. Using a stereo-video camera, we can also calculate of area of the image so quadrats are not needed. Footage can be used to create 3D models of reef complexity and surface area.[\/vc_column_text][\/qode_elements_holder_item][qode_elements_holder_item item_padding=”0px 0px 0px 0px” advanced_animations=”no”][vc_single_image image=”16213″ img_size=”full” qode_css_animation=””][\/qode_elements_holder_item][\/qode_elements_holder][\/vc_column][\/vc_row][vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”full_width” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern” background_color=”#ffffff”][vc_column][qode_elements_holder number_of_columns=”two_columns” switch_to_one_column=”1000″][qode_elements_holder_item item_padding=”0px 0px 0px 0px” advanced_animations=”no”][vc_single_image image=”16211″ img_size=”full” qode_css_animation=””][\/qode_elements_holder_item][qode_elements_holder_item item_padding=”20px 9% 30px 9%” advanced_animations=”no”][vc_single_image image=”15753″ img_size=”full” qode_css_animation=”” css=”.vc_custom_1491176500169{margin-bottom: 25px !important;}”][vc_column_text]<\/p>\n