Effects of habitat and substrate complexity on
... same time, physical parameters, such as light and nutrient availability (Emery, 1978), habitat structure and substrate complexity (Luckhurst & Luckhurst, 1978), variations in depth (Harmelin, 1990; Dufour et al., 1995; García-Charton & Pérez-Ruzafa, 1998), climatic differences (Holbrook et al., 1997 ...
... same time, physical parameters, such as light and nutrient availability (Emery, 1978), habitat structure and substrate complexity (Luckhurst & Luckhurst, 1978), variations in depth (Harmelin, 1990; Dufour et al., 1995; García-Charton & Pérez-Ruzafa, 1998), climatic differences (Holbrook et al., 1997 ...
Common Clownfish Amphiprion ocellaris
... Prey: Clownfish eat a variety of creatures that are usually left over from their host anemones, including zooplankton, copepods and isopods. Predators: Predators to clownfish include larger fish, sharks, and rays. Life Span: In the wild, clownfish can live to between 6 and 10 years of age. Reproduc ...
... Prey: Clownfish eat a variety of creatures that are usually left over from their host anemones, including zooplankton, copepods and isopods. Predators: Predators to clownfish include larger fish, sharks, and rays. Life Span: In the wild, clownfish can live to between 6 and 10 years of age. Reproduc ...
The central role of fish in lake restoration and management
... as the recruitment was dependent on small numbers of incoming larvae, but as soon as the roach population became adult (after three years) a potentially high recruitment was possible. By the fifth year the recruitment of roach was very strong and could no longer be prevented by perch and pikeperch. ...
... as the recruitment was dependent on small numbers of incoming larvae, but as soon as the roach population became adult (after three years) a potentially high recruitment was possible. By the fifth year the recruitment of roach was very strong and could no longer be prevented by perch and pikeperch. ...
23/Conservation of Resources
... Fisheries experts claim, however, that deepocean fishing will not be sustainable. For example, the sablefish, which lives at a depth of 1.5 km, matures and reproduces very slowly; overfishing would limit its ability to replenish its numbers. Recently, thousands of tons of orange roughy, which feed o ...
... Fisheries experts claim, however, that deepocean fishing will not be sustainable. For example, the sablefish, which lives at a depth of 1.5 km, matures and reproduces very slowly; overfishing would limit its ability to replenish its numbers. Recently, thousands of tons of orange roughy, which feed o ...
FISHERIES_RESOURCES
... CO2 expected over this century will cause fish to produce even more calcium carbonate. This is for two reasons. Firstly, higher temperatures stimulate overall metabolism in fish, which drives all their biological processes to run faster. Secondly, increasing CO2 in their blood directly stimulates ca ...
... CO2 expected over this century will cause fish to produce even more calcium carbonate. This is for two reasons. Firstly, higher temperatures stimulate overall metabolism in fish, which drives all their biological processes to run faster. Secondly, increasing CO2 in their blood directly stimulates ca ...
Sacramento Winter Chinook Salmon
... the winter Chinook populations into a single population with limited habitat ...
... the winter Chinook populations into a single population with limited habitat ...
Salmon Farming and the Environment: A Scottish perspective
... copepods, which live on the gills and other body surfaces of fish. They feed on mucus, skin and blood, causing open wounds that expose fish to osmotic and respiratory stress as well as providing a route for secondary infections by bacteria or viruses. ...
... copepods, which live on the gills and other body surfaces of fish. They feed on mucus, skin and blood, causing open wounds that expose fish to osmotic and respiratory stress as well as providing a route for secondary infections by bacteria or viruses. ...
new records of the parrot fish, sparisoma cretense, and the cleaver
... 2009 (twice a year in spring and summer/fall) may suggest that this species remains very rare in the Croatian Adriatic and may not have established stable populations, a hypothesis that can only be tested by additional research. One reason for the lack of encounter via our survey method may be that ...
... 2009 (twice a year in spring and summer/fall) may suggest that this species remains very rare in the Croatian Adriatic and may not have established stable populations, a hypothesis that can only be tested by additional research. One reason for the lack of encounter via our survey method may be that ...
An updated checklist of poisonous fishes of Turkish Aegean Sea
... considered aggressive so they can attack divers that approach them. 2. Fish that carry poisonous bite. In this group we include only murray eels. It has not been proved that they carry any poisonous glands in the mouth. 3. Fish having poisonous flesh or liver. The poisonous flesh or some other part ...
... considered aggressive so they can attack divers that approach them. 2. Fish that carry poisonous bite. In this group we include only murray eels. It has not been proved that they carry any poisonous glands in the mouth. 3. Fish having poisonous flesh or liver. The poisonous flesh or some other part ...
Abundance and distribution of the larval stages of the mesopelagic
... The plankton samples examined were taken off the west coast of Ireland within the area 48º to 60ºN and 08º15' to 15º45'W (Fig. 1). The samples were collected in 1998, as part of the International Council for the Exploration of the Sea (ICES) Triennial Mackerel Egg Survey, by the research vessels Wal ...
... The plankton samples examined were taken off the west coast of Ireland within the area 48º to 60ºN and 08º15' to 15º45'W (Fig. 1). The samples were collected in 1998, as part of the International Council for the Exploration of the Sea (ICES) Triennial Mackerel Egg Survey, by the research vessels Wal ...
The Role of Research and Monitoring in Management of Living... Southeast U.S. Coast
... was closed in 1999 because of extremely low spawning potential. The economic value of this reef species complex makes protecting the sustainability of the fishery a critical consideration for this region. In addition to reduced populations of top-level predators, community structure changes have bee ...
... was closed in 1999 because of extremely low spawning potential. The economic value of this reef species complex makes protecting the sustainability of the fishery a critical consideration for this region. In addition to reduced populations of top-level predators, community structure changes have bee ...
Full text in pdf format
... reproductive activities, and the index of pleonal expansion (PE) can be employed as a morphological criterion for selecting females that are able to mate (Sato & Yoseda 2009b). Coconut crabs have 4 tergites, and the distance between the tergites increases when the pleon becomes enlarged. Thus the PE ...
... reproductive activities, and the index of pleonal expansion (PE) can be employed as a morphological criterion for selecting females that are able to mate (Sato & Yoseda 2009b). Coconut crabs have 4 tergites, and the distance between the tergites increases when the pleon becomes enlarged. Thus the PE ...
Fishes I
... The blood of sharks is isosmotic to sea water and contains high concentrations of urea and trimethylamine oxide (TMAO – from ammonia) and low concentrations of NaCl (about 1/3 that of seawater). ...
... The blood of sharks is isosmotic to sea water and contains high concentrations of urea and trimethylamine oxide (TMAO – from ammonia) and low concentrations of NaCl (about 1/3 that of seawater). ...
Document
... that enabled the slow fertilization in our experiments. Sperm motility does not seem to be constricted by the viscosity of the mucus [24]. Le Comber et al. [25] measured that sperm of English three-spined sticklebacks were able to fertilize eggs for up to 15–20 minutes post ejaculation in fresh wate ...
... that enabled the slow fertilization in our experiments. Sperm motility does not seem to be constricted by the viscosity of the mucus [24]. Le Comber et al. [25] measured that sperm of English three-spined sticklebacks were able to fertilize eggs for up to 15–20 minutes post ejaculation in fresh wate ...
USGS VHS Factsheet(2008)
... Predictions for the future Due to increased fish health surveillance activities in the Great Lakes planned by both US and Canadian agencies, we anticipate that many more isolates of VHSV will be obtained from the region during the next several years. Molecular analysis of these isolates will increas ...
... Predictions for the future Due to increased fish health surveillance activities in the Great Lakes planned by both US and Canadian agencies, we anticipate that many more isolates of VHSV will be obtained from the region during the next several years. Molecular analysis of these isolates will increas ...
Durvillechabanet 225-230
... Yet in many studies on reef ichthyofauna, these species are not taken into account and are often considered as “negligible” not only because of their small size, but also because of the difficulty of recording them using UVC methods (Chabanet, 1994; Letourneur, 1996). This study shows that such fish ...
... Yet in many studies on reef ichthyofauna, these species are not taken into account and are often considered as “negligible” not only because of their small size, but also because of the difficulty of recording them using UVC methods (Chabanet, 1994; Letourneur, 1996). This study shows that such fish ...
OVER FISHING AND MITIGATION Key words: Economy
... Atlantic cod, too, provided livings for fishing families in America for over two hundred years. Fish Populations This idea of resilient populations was in many ways made worse by population research techniques which mathematically indicated that the harder a population was fished, the more fishes th ...
... Atlantic cod, too, provided livings for fishing families in America for over two hundred years. Fish Populations This idea of resilient populations was in many ways made worse by population research techniques which mathematically indicated that the harder a population was fished, the more fishes th ...
WHAT IS A FISH? - Two Oceans Aquarium
... Ancient fishes first appeared in the fossil records over 500 million years ago, more than 100 million years before any other vertebrate group. Fishes are therefore the most ancient, and all other vertebrate groups (amphibians, reptiles, birds and mammals) evolved from them. Fish first laid down the ...
... Ancient fishes first appeared in the fossil records over 500 million years ago, more than 100 million years before any other vertebrate group. Fishes are therefore the most ancient, and all other vertebrate groups (amphibians, reptiles, birds and mammals) evolved from them. Fish first laid down the ...
September 2005 Newsletter - Transvaal Herpetological Association
... The female Colombian Boa Constrictor (Boa constrictor imperator) deemed “BCI03CFU” seems to have retained the sperm from the sire deemed “WT Male” for approximately twenty-one months. The Super Salmon Type male Colombian Boa Constrictor (Boa constrictor imperator), “SS Male”, induced ovulation in th ...
... The female Colombian Boa Constrictor (Boa constrictor imperator) deemed “BCI03CFU” seems to have retained the sperm from the sire deemed “WT Male” for approximately twenty-one months. The Super Salmon Type male Colombian Boa Constrictor (Boa constrictor imperator), “SS Male”, induced ovulation in th ...
Ten years of coastal fish monitoring in Estonia: dynamics of fish
... 1994 year-classes, population of perch collapsed. Very strong 1999 year-class and (according to 2003 data) relatively strong year-classes of the most recent years have improved the situation. This is facilitated by fishery regulations (limiting of gear, introduction of minimum legal size for perch). ...
... 1994 year-classes, population of perch collapsed. Very strong 1999 year-class and (according to 2003 data) relatively strong year-classes of the most recent years have improved the situation. This is facilitated by fishery regulations (limiting of gear, introduction of minimum legal size for perch). ...
Angelfish – Family Pomacanthidae Perhaps one of the most popular
... may range from blue to gray or brown and may pale or darken readily. The edges of the dorsal, anal and tail fins may have a blue or white edge. Often the face has markings radiating from the eye toward the nose. Ocean surgeonfish are detritus grazers, thus they ingest a lot of sediment. Their intest ...
... may range from blue to gray or brown and may pale or darken readily. The edges of the dorsal, anal and tail fins may have a blue or white edge. Often the face has markings radiating from the eye toward the nose. Ocean surgeonfish are detritus grazers, thus they ingest a lot of sediment. Their intest ...
Document
... The egg laying habits of Monarch Butterflies were observed in laboratory and field settings to determine what effect the presence of Black Swallowwort had on the behavior. It was discovered through laboratory experiments, that Monarch butterflies lay their eggs on the invasive weed. The eggs laid on ...
... The egg laying habits of Monarch Butterflies were observed in laboratory and field settings to determine what effect the presence of Black Swallowwort had on the behavior. It was discovered through laboratory experiments, that Monarch butterflies lay their eggs on the invasive weed. The eggs laid on ...
insects and freshwater fish
... They are mainly foliage feeders, with some species eating a wide range of food, while others will only eat a specific kind. For example, clitarchus only live on kanuka and manuka. Stick insects cannot make sounds, and have no ears, but they have good eyesight. Males are much smaller than females, an ...
... They are mainly foliage feeders, with some species eating a wide range of food, while others will only eat a specific kind. For example, clitarchus only live on kanuka and manuka. Stick insects cannot make sounds, and have no ears, but they have good eyesight. Males are much smaller than females, an ...
Deep Sea Trenches
... The hagfish is a true monster of the deep. To see why, one only has to examine its greusome feeding habits. A hagfish begins its feeding process by attaching itself to a passing fish. Once firmly attached, it then bores its way inside its unsuspecting host. Once inside, the hagfish will actually ea ...
... The hagfish is a true monster of the deep. To see why, one only has to examine its greusome feeding habits. A hagfish begins its feeding process by attaching itself to a passing fish. Once firmly attached, it then bores its way inside its unsuspecting host. Once inside, the hagfish will actually ea ...
Fish reproduction
Fish reproductive organs include testes and ovaries. In most species, gonads are paired organs of similar size, which can be partially or totally fused. There may also be a range of secondary organs that increase reproductive fitness. The genital papilla is a small, fleshy tube behind the anus in some fishes, from which the sperm or eggs are released; the sex of a fish often can be determined by the shape of its papilla.