CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION ORDER NO. R5-2004-0151
... animals including, but not limited to, the Salmonidae family of fish (e.g. trout and salmon) in ponds, raceways, or other similar structures. In addition, the facility must discharge at least 30 calendar days per year, produce at least 20,000 pounds harvest weight (9,090 kilograms) of aquatic animal ...
... animals including, but not limited to, the Salmonidae family of fish (e.g. trout and salmon) in ponds, raceways, or other similar structures. In addition, the facility must discharge at least 30 calendar days per year, produce at least 20,000 pounds harvest weight (9,090 kilograms) of aquatic animal ...
View Article (External Location)
... of people releasing Gambusia into an area where he was trying to develop fish populations to feed indigenous populations only to find the Gambusia eating the eggs of the desired fish species. It is instructive to compare the comrnentary on Gambusia in 2 standard field guides to freshwater fishes of ...
... of people releasing Gambusia into an area where he was trying to develop fish populations to feed indigenous populations only to find the Gambusia eating the eggs of the desired fish species. It is instructive to compare the comrnentary on Gambusia in 2 standard field guides to freshwater fishes of ...
CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION ORDER NO. R5-2004-0146
... of the Code of Federal Regulations (40 CFR 122.24) as a fish hatchery, fish farm, or other facility which contains, grows, or holds cold-water fish species or other cold water aquatic animals including, but not limited to, the Salmonidae family of fish (e.g. trout and salmon) in ponds, raceways, or ...
... of the Code of Federal Regulations (40 CFR 122.24) as a fish hatchery, fish farm, or other facility which contains, grows, or holds cold-water fish species or other cold water aquatic animals including, but not limited to, the Salmonidae family of fish (e.g. trout and salmon) in ponds, raceways, or ...
Population Changes of Sportfish Following Flathead Catfish
... on the available forage base. In the Altamaha River, Georgia, centrarchids, including sunfish species (Lepomis spp.), were the dominant prey item (by weight) found in flathead catfish stomachs, followed by ictalurid species (Weller and Robbins 2001). In another study, centrarchids were found to be t ...
... on the available forage base. In the Altamaha River, Georgia, centrarchids, including sunfish species (Lepomis spp.), were the dominant prey item (by weight) found in flathead catfish stomachs, followed by ictalurid species (Weller and Robbins 2001). In another study, centrarchids were found to be t ...
Going Against the Flow - Non-Conventional Wisdom
... they use teeth to catch copepods, eggs, and larvae Like their movie cousins, they may also target prey as juveniles With grazing pressure removed, well-fertilized algae can blossom and lead to harmful algal blooms. Movie: young herring particulate feeding. A juvenile herring attacks four times i ...
... they use teeth to catch copepods, eggs, and larvae Like their movie cousins, they may also target prey as juveniles With grazing pressure removed, well-fertilized algae can blossom and lead to harmful algal blooms. Movie: young herring particulate feeding. A juvenile herring attacks four times i ...
Guide to Fisheries Science and Stock Assessments
... interstate fisheries management programs is the primary role of the Commission, with stock assessments forming the basis of these programs. The Commission assesses fish stocks to determine their status, to evaluate how they may be affected by potential management actions, and to forecast their futur ...
... interstate fisheries management programs is the primary role of the Commission, with stock assessments forming the basis of these programs. The Commission assesses fish stocks to determine their status, to evaluate how they may be affected by potential management actions, and to forecast their futur ...
On the ecology of a tropical fish community - Wageningen UR E
... Theresearch described inthisthesis wascarried out at the Department of Zoology of the Ruhuna University (RU), Matara, Sri Lanka, the Centre for Limnology (CL) of the Netherlands Institute of Ecology (NIE) and Wageningen Institute of Animal Sciences (WIAS), Department of Fish Culture and Fisheries (D ...
... Theresearch described inthisthesis wascarried out at the Department of Zoology of the Ruhuna University (RU), Matara, Sri Lanka, the Centre for Limnology (CL) of the Netherlands Institute of Ecology (NIE) and Wageningen Institute of Animal Sciences (WIAS), Department of Fish Culture and Fisheries (D ...
CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION
... 40 of the Code of Federal Regulations (40 CFR 122.24) as a fish hatchery, fish farm, or other facility which contains, grows, or holds cold-water fish species or other cold-water aquatic animals including, but not limited to, the Salmonidae family of fish (e.g. trout and salmon) in ponds, raceways, ...
... 40 of the Code of Federal Regulations (40 CFR 122.24) as a fish hatchery, fish farm, or other facility which contains, grows, or holds cold-water fish species or other cold-water aquatic animals including, but not limited to, the Salmonidae family of fish (e.g. trout and salmon) in ponds, raceways, ...
Habitat Requirements for Coastal Coho Salmon Populations
... between the gravel particles varying distances depending on gravel size. The newly hatched fish have an attached yolk sac that provides the required nutrition. Towards the end of incubation in the spring, alevins move up through the gravel to emerge as fry. This process occurs at night which helps t ...
... between the gravel particles varying distances depending on gravel size. The newly hatched fish have an attached yolk sac that provides the required nutrition. Towards the end of incubation in the spring, alevins move up through the gravel to emerge as fry. This process occurs at night which helps t ...
Understanding what controls the spatial distribution of fish
... focussed on the dynamic nature of spatial distribution of groups of individuals under a number of constraints external and internal to the population. Besides SDMs and MAMs, modelling the spatial distribution of fish populations can be achieved by models that are fundamentally static (like SDMs) but ...
... focussed on the dynamic nature of spatial distribution of groups of individuals under a number of constraints external and internal to the population. Besides SDMs and MAMs, modelling the spatial distribution of fish populations can be achieved by models that are fundamentally static (like SDMs) but ...
Michigan Department of Natural Resources 2009-85 Status of the Fishery Resource Report
... The first aquatic community assessment of Seven Mile Pond occurred in 1950 and was conducted by the Michigan Department of Conservation (MDOC). Many Michigan lakes were stocked prior to 1950 when this was a common practice. This occurred despite the fact that many of these lakes did not need to be s ...
... The first aquatic community assessment of Seven Mile Pond occurred in 1950 and was conducted by the Michigan Department of Conservation (MDOC). Many Michigan lakes were stocked prior to 1950 when this was a common practice. This occurred despite the fact that many of these lakes did not need to be s ...
(cont.).
... viruses and parasitoids that attack animals. 80% of all life forms are considered parasitic ...
... viruses and parasitoids that attack animals. 80% of all life forms are considered parasitic ...
Migratory Fishes as Material and Process Subsidies in Riverine Ecosystems
... genus Tor that are known to ascend Himalayan streams (Welcomme 1985). The migratory strategy of a species should influence its role as a material or process subsidy. Synchronous migrations can enable species to achieve densities and biomass that would otherwise not be possible. Polis et al. (1997) o ...
... genus Tor that are known to ascend Himalayan streams (Welcomme 1985). The migratory strategy of a species should influence its role as a material or process subsidy. Synchronous migrations can enable species to achieve densities and biomass that would otherwise not be possible. Polis et al. (1997) o ...
The ecological module of BOATS-1.0
... ductions (local extinctions) (McCauley et al., 2015), and an index of marine finfish biomass indicates an aggregate loss of 38 % over many species (Hutchings et al., 2010). Despite increasing harvesting effort (Watson et al., 2013b), annual wild harvest appears to have peaked globally in the early 1 ...
... ductions (local extinctions) (McCauley et al., 2015), and an index of marine finfish biomass indicates an aggregate loss of 38 % over many species (Hutchings et al., 2010). Despite increasing harvesting effort (Watson et al., 2013b), annual wild harvest appears to have peaked globally in the early 1 ...
Jellyfish, Forage Fish, and the World`s Major Fisheries
... species (i.e., fish, fish food, and fish predators). Large coastal jellyfish are undeniably major consumers of plankton, including fish eggs and larvae (Purcell, 1985). Yet, because jellyfish are not in the direct ascension from fish food to fish predators (with the exception of their predation on f ...
... species (i.e., fish, fish food, and fish predators). Large coastal jellyfish are undeniably major consumers of plankton, including fish eggs and larvae (Purcell, 1985). Yet, because jellyfish are not in the direct ascension from fish food to fish predators (with the exception of their predation on f ...
The tragedy of our legacy
... the breed and fry of sea fish has been of late years (....) destroyed by the using of too small size of mesh (....) no one shall use (....) any trawl-net, drag-net, or set-net (.....) which has any mesh size less than three and a half inch [90 mm] from knot to knot (...)” (cited by Burd, 1986). Size ...
... the breed and fry of sea fish has been of late years (....) destroyed by the using of too small size of mesh (....) no one shall use (....) any trawl-net, drag-net, or set-net (.....) which has any mesh size less than three and a half inch [90 mm] from knot to knot (...)” (cited by Burd, 1986). Size ...
Parasite infections of domestic animals in the Nordic countries
... These abstracts are available online at http://www.actavetscand.com/supplements/52/S1 ...
... These abstracts are available online at http://www.actavetscand.com/supplements/52/S1 ...
Myxobolus cerebralis
Myxobolus cerebralis is a myxosporean parasite of salmonids (salmon, trout, and their allies) that causes whirling disease in farmed salmon and trout and also in wild fish populations. It was first described in rainbow trout in Germany a century ago, but its range has spread and it has appeared in most of Europe (including Russia), the United States, South Africa and other countries. In the 1980s, M. cerebralis was found to require a tubificid oligochaete (a kind of segmented worm) to complete its life cycle. The parasite infects its hosts with its cells after piercing them with polar filaments ejected from nematocyst-like capsules.Whirling disease afflicts juvenile fish (fingerlings and fry) and causes skeletal deformation and neurological damage. Fish ""whirl"" forward in an awkward, corkscrew-like pattern instead of swimming normally, find feeding difficult, and are more vulnerable to predators. The mortality rate is high for fingerlings, up to 90% of infected populations, and those that do survive are deformed by the parasites residing in their cartilage and bone. They act as a reservoir for the parasite, which is released into water following the fish's death. M. cerebralis is one of the most economically important myxozoans in fish, as well as one of the most pathogenic. It was the first myxosporean whose pathology and symptoms were described scientifically. The parasite is not transmissible to humans.