bottom trawl discards in the gulf of suez, egypt. ices cm 2006/k:07
... Discards refers to part of the gross catch not used in any way but is thrown back into the sea (Saila, 1983). Several abundant species are discarded, dead or dying, either because of their small size or because of poor commercial value. The high rate of discarding in fisheries may cause ecological e ...
... Discards refers to part of the gross catch not used in any way but is thrown back into the sea (Saila, 1983). Several abundant species are discarded, dead or dying, either because of their small size or because of poor commercial value. The high rate of discarding in fisheries may cause ecological e ...
IM_chapter9 Seafloor
... Submarine canyons, mostly on continental slopes, carry huge quantities of sediment by turbidity currents into deeper water, where it is deposited as overlapping submarine fans that make up a large part of the continental rise. ...
... Submarine canyons, mostly on continental slopes, carry huge quantities of sediment by turbidity currents into deeper water, where it is deposited as overlapping submarine fans that make up a large part of the continental rise. ...
The Ocean Floor
... Less than 0.1 percent of the world's seamounts have been explored to learn what species live on them, but many of the species that have been found so far are new to science. It has been estimated that more than 30,000 seamounts reaching more than 1,000 meters tall are found in the Pacific Ocean. App ...
... Less than 0.1 percent of the world's seamounts have been explored to learn what species live on them, but many of the species that have been found so far are new to science. It has been estimated that more than 30,000 seamounts reaching more than 1,000 meters tall are found in the Pacific Ocean. App ...
7.1-7.2 Bay of Biscay and Iberian ecosystem overview
... by the MW. For example, the yearly mean temperature at 100 m depth is 11.2°C to the north of the advisory region, 48°N, and 15.6°C to the south, 36°N (Levitus, 2001). Upwelling events are a common feature in Portugal, west of Galicia and in a narrow coastal band in the western Cantabrian Sea, especi ...
... by the MW. For example, the yearly mean temperature at 100 m depth is 11.2°C to the north of the advisory region, 48°N, and 15.6°C to the south, 36°N (Levitus, 2001). Upwelling events are a common feature in Portugal, west of Galicia and in a narrow coastal band in the western Cantabrian Sea, especi ...
Summer cyanobacterial blooms in
... has studied biology at Lund, Uppsala and Stockholm University, and graduated in 2007. Besides PhD studies, she has among other things worked as water management consultant in Stockholm. Photo: Fredrik Wulff ...
... has studied biology at Lund, Uppsala and Stockholm University, and graduated in 2007. Besides PhD studies, she has among other things worked as water management consultant in Stockholm. Photo: Fredrik Wulff ...
Earth Science Chapter 20 20.1 The Water Planet 20.1 The Water
... •Often associated with the mouths of major rivers. •Other canyons may have been caused by turbidity currents. •The turbidity currents are dense currents that carry large amounts of sediments down the continental slope. Continental Rise. ...
... •Often associated with the mouths of major rivers. •Other canyons may have been caused by turbidity currents. •The turbidity currents are dense currents that carry large amounts of sediments down the continental slope. Continental Rise. ...
Earth Science Chapter 20
... • Often associated with the mouths of major rivers. • Other canyons may have been caused by turbidity currents. • The turbidity currents are dense currents that carry large amounts of sediments down the continental slope. ...
... • Often associated with the mouths of major rivers. • Other canyons may have been caused by turbidity currents. • The turbidity currents are dense currents that carry large amounts of sediments down the continental slope. ...
Changes in Mediterranean rocky-reef fish assemblag
... Mediterranean Sea) was investigated to assess whether fish assemblage structure, and temporal trends in species richness and abundance of fishes were affected by sewage pollution. Fish assemblages were evaluated by visual census at 3 locations (3 to 4 km apart), 1 putatively impacted by a sewage out ...
... Mediterranean Sea) was investigated to assess whether fish assemblage structure, and temporal trends in species richness and abundance of fishes were affected by sewage pollution. Fish assemblages were evaluated by visual census at 3 locations (3 to 4 km apart), 1 putatively impacted by a sewage out ...
The Ocean Basin
... Cut into continental shelf and slope and terminate on the sea-floor in a fan shaped wedge of sediment. Mainly formed by turbidity currents – underwater landslides. Sediment mixes with water and the more dense mixture moves downslope eroding the continental slope with it. ...
... Cut into continental shelf and slope and terminate on the sea-floor in a fan shaped wedge of sediment. Mainly formed by turbidity currents – underwater landslides. Sediment mixes with water and the more dense mixture moves downslope eroding the continental slope with it. ...
The 2003 Coastside / RFA Groundfish Survey Report
... • Bering Sea/Aleutian Islands • Gulf of Alaska • California Current (WA, OR, ...
... • Bering Sea/Aleutian Islands • Gulf of Alaska • California Current (WA, OR, ...
Living Shipwrecks: Science Under the Sea
... Marine animals compete for space and food. The more competition there is for food, the less chance there is of getting your share. Different types of animals therefore have special design features – we call it adaptation – to live and succeed in a particular place (niche). This adaptation might give ...
... Marine animals compete for space and food. The more competition there is for food, the less chance there is of getting your share. Different types of animals therefore have special design features – we call it adaptation – to live and succeed in a particular place (niche). This adaptation might give ...
2- MARINE ORGANISMS
... Members of another protist group often found near the ocean’s surface are the dinoflagellates. Three types of dinoflagellates are shown in the next Figure. They are classified in phylum Dinoflagellata or Pyrrophyta, which means “red (or fire) algae.” How do dinoflagellates compare with diatoms? Dino ...
... Members of another protist group often found near the ocean’s surface are the dinoflagellates. Three types of dinoflagellates are shown in the next Figure. They are classified in phylum Dinoflagellata or Pyrrophyta, which means “red (or fire) algae.” How do dinoflagellates compare with diatoms? Dino ...
Chapter 23 Vocabulary- The Ocean Floor Read each definition
... Read each definition, rewrite the definition IN YOUR OWN WORDS, and then draw a picture to illustrate the definition. Abyssal hill: One of a series of small rolling hills on the ocean floor that occur next to continental margins or ridges. ...
... Read each definition, rewrite the definition IN YOUR OWN WORDS, and then draw a picture to illustrate the definition. Abyssal hill: One of a series of small rolling hills on the ocean floor that occur next to continental margins or ridges. ...
Plankton and Fisheries in Devon
... Sir Alister Hardy Foundation for Ocean Science, Tha Laboratory, Citadel Hill, Plymouth PL1 2PB ...
... Sir Alister Hardy Foundation for Ocean Science, Tha Laboratory, Citadel Hill, Plymouth PL1 2PB ...
Marine environmental monitoring programmes in South Africa: a
... water column (nutrients, oxygen, phytoplankton pigments) and the phytoplankton and zooplankton species and sizes. These surveys are usually conducted two or three times per year, at the same time of year (Fig. 4). Data are used to explain unusual distributions, fish condition or feeding behaviour, t ...
... water column (nutrients, oxygen, phytoplankton pigments) and the phytoplankton and zooplankton species and sizes. These surveys are usually conducted two or three times per year, at the same time of year (Fig. 4). Data are used to explain unusual distributions, fish condition or feeding behaviour, t ...
Long-term shifts in the species composition of a coastal fish community
... climate (Hall 1999). On the eastern Scotian Shelf, commercial fishing and decadal variability in water temperature appear to have shifted the fish community from a demersalto a pelagic-dominated state (Choi et al. 2004). The existing examples of species replacements on decadal time scales suggest so ...
... climate (Hall 1999). On the eastern Scotian Shelf, commercial fishing and decadal variability in water temperature appear to have shifted the fish community from a demersalto a pelagic-dominated state (Choi et al. 2004). The existing examples of species replacements on decadal time scales suggest so ...
Gulf Gems - Marine Conservation Institute
... macro algae is also prevalent along the substrate, giving the ridge the appearance of being covered by fields of green lettuce. While fish are not particularly dense along the ridge, it is inhabited by more than 60 species, including commercially important species such as red grouper. Many of the sp ...
... macro algae is also prevalent along the substrate, giving the ridge the appearance of being covered by fields of green lettuce. While fish are not particularly dense along the ridge, it is inhabited by more than 60 species, including commercially important species such as red grouper. Many of the sp ...
MARINE VERTEBRATES
... Sharks are often called “living fossils” because they closely resemble some early ancestral forms. What features do sharks possess that have enabled them to survive for so long? Look at the structures of a typical shark, shown in Figure 12-9. Sharks have very sensitive receptors for the detection of ...
... Sharks are often called “living fossils” because they closely resemble some early ancestral forms. What features do sharks possess that have enabled them to survive for so long? Look at the structures of a typical shark, shown in Figure 12-9. Sharks have very sensitive receptors for the detection of ...
Megrim in northern North Sea and West of Scotland
... Demersal otter trawling in the northern North Sea and west of Scotland targets the mixed fishery in the area. Gear towed can be twin or single rig, with trawls doors and sweeps creating sand clouds that herd fish into the net (Løkkeborg, 2005). ...
... Demersal otter trawling in the northern North Sea and west of Scotland targets the mixed fishery in the area. Gear towed can be twin or single rig, with trawls doors and sweeps creating sand clouds that herd fish into the net (Løkkeborg, 2005). ...
An overview of marine fisheries infrastructure and fish utilization
... Karnataka emerged as a maritime state in 1956 and established its independent Department of Fisheries in 1957. Since then, the Department of Fisheries has been consistently striving hard for the overall development of fisheries and fishermen by implementing several development schemes both in marine ...
... Karnataka emerged as a maritime state in 1956 and established its independent Department of Fisheries in 1957. Since then, the Department of Fisheries has been consistently striving hard for the overall development of fisheries and fishermen by implementing several development schemes both in marine ...
How Is T
... Fisher and Madigan published their results in late May of 2012, and the response was titanic. “Seven hundred U.S. newspapers, and 400 elsewhere, carried this story,” Fisher recalled, “often on the front page.” He submitted to countless interviews and made several television appearances to try to exp ...
... Fisher and Madigan published their results in late May of 2012, and the response was titanic. “Seven hundred U.S. newspapers, and 400 elsewhere, carried this story,” Fisher recalled, “often on the front page.” He submitted to countless interviews and made several television appearances to try to exp ...
Spirula
... • Deep-sea fishes display a variety of adaptations such as sharp teeth, large mouths, and huge stomachs that help them survive in a habitat with limited food. • The environmental conditions of the deep sea have been relatively stable for more than 100 million years, and as a result, several organism ...
... • Deep-sea fishes display a variety of adaptations such as sharp teeth, large mouths, and huge stomachs that help them survive in a habitat with limited food. • The environmental conditions of the deep sea have been relatively stable for more than 100 million years, and as a result, several organism ...
Harmful Algal Blooms (HABs) in the United States
... toxic p hytoplankto n, sometimes at levels potentially lethal to humans or other consumers and may decrease ...
... toxic p hytoplankto n, sometimes at levels potentially lethal to humans or other consumers and may decrease ...
Vocabulary Review Summary of Key Ideas
... 12. How can a coral atoll be attached to the ocean floor when corals cannot live (or, therefore, form reefs) in the deep ocean? 13. What is the difference between an ooze and other sediments? 14. Are you more likely to find a deep-ocean trench along an active continental margin or along a passive co ...
... 12. How can a coral atoll be attached to the ocean floor when corals cannot live (or, therefore, form reefs) in the deep ocean? 13. What is the difference between an ooze and other sediments? 14. Are you more likely to find a deep-ocean trench along an active continental margin or along a passive co ...
floor features notes
... – Build fan-shaped deposits at the mouths of the canyons (abyssal fans) ...
... – Build fan-shaped deposits at the mouths of the canyons (abyssal fans) ...
Demersal fish
Demersal fish live and feed on or near the bottom of seas or lakes (the demersal zone). They occupy the sea floors and lake beds, which usually consist of mud, sand, gravel or rocks. In coastal waters they are found on or near the continental shelf, and in deep waters they are found on or near the continental slope or along the continental rise. They are not generally found in the deepest waters, such as abyssal depths or on the abyssal plain, but they can be found around seamounts and islands. The word demersal comes from the Latin demergere, which means to sink.Demersal fish are bottom feeders. They can be contrasted with pelagic fish which live and feed away from the bottom in the open water column. Demersal fish fillets contain little fish oil (one to four percent), whereas pelagic fish can contain up to 30 percent.