Appendix 6. Intensive cultivation of a calanoid copepod
... industries could achieve substantial increase in productivity through using these animals as alternatives for or supplements to the usual food for larval fish. 2. There is benefit in extending the number of marine or estuarine fish which can be economically reared as table fish. For some fish specie ...
... industries could achieve substantial increase in productivity through using these animals as alternatives for or supplements to the usual food for larval fish. 2. There is benefit in extending the number of marine or estuarine fish which can be economically reared as table fish. For some fish specie ...
Regional Comparisons of Juvenile Salmon Feeding in Coastal
... spp. depend on feeding at high and sustained levels to achieve growth necessary for survival. In the last decade, several concurrent studies have been examining the food habits and feeding intensity of juvenile Pacific salmon in the shelf regions from California to the northern Gulf of Alaska. In th ...
... spp. depend on feeding at high and sustained levels to achieve growth necessary for survival. In the last decade, several concurrent studies have been examining the food habits and feeding intensity of juvenile Pacific salmon in the shelf regions from California to the northern Gulf of Alaska. In th ...
Oregon Department of Fish and Wildlife (ODFW)
... 3.2 Potential Effects: Dredging activities often negatively affect ecological conditions and productivity for a number of aquatic organisms, most typically by the disturbance and restructuring of benthic substrata. For example, disturbance of non-cohesive and unconsolidated soft sediments generally ...
... 3.2 Potential Effects: Dredging activities often negatively affect ecological conditions and productivity for a number of aquatic organisms, most typically by the disturbance and restructuring of benthic substrata. For example, disturbance of non-cohesive and unconsolidated soft sediments generally ...
Ecological Problems With Iowa`s Invasive and Introduced Fishes
... most likely, it isa combination of adaptations that promote the reproduction and dispersal of these species. Stauffer (1984) also proposed that evolution in a competitive environment could preadapt an exotic fish to become established and increase in range. Such a species would, therefore, be a "K" ...
... most likely, it isa combination of adaptations that promote the reproduction and dispersal of these species. Stauffer (1984) also proposed that evolution in a competitive environment could preadapt an exotic fish to become established and increase in range. Such a species would, therefore, be a "K" ...
Predator Recognition and Responses in the endangered Macquarie
... attention and may be discrete enough to warrant splitting the species (Faulks et al. 2010). It is likely, however, that the ‘species’ in the Kangaroo River is already extinct. The Macquarie perch is a medium-sized, long lived fish (>26 years; Cadwallader, and Rogan 1977). Western fish are relativel ...
... attention and may be discrete enough to warrant splitting the species (Faulks et al. 2010). It is likely, however, that the ‘species’ in the Kangaroo River is already extinct. The Macquarie perch is a medium-sized, long lived fish (>26 years; Cadwallader, and Rogan 1977). Western fish are relativel ...
Sec_3_Status_of_species_BA - Bay
... The USFWS listed the delta smelt as threatened under the federal ESA on March 5, 1993, based upon its dramatically-reduced abundance, threats to its habitat, and the inadequacy of regulatory mechanisms then in effect (58 FR 12854). In 2004, a 5-year status review reaffirmed the need to retain the de ...
... The USFWS listed the delta smelt as threatened under the federal ESA on March 5, 1993, based upon its dramatically-reduced abundance, threats to its habitat, and the inadequacy of regulatory mechanisms then in effect (58 FR 12854). In 2004, a 5-year status review reaffirmed the need to retain the de ...
Goliath grouper issues in Florida: fact or fiction. Christopher C
... Goliath grouper (Epinephelus itajara), a large reef fish with populations in tropical Atlantic waters, is vulnerable to overexploitation and local extinction and is classified as critically endangered throughout most of its range by the World Conservation Union (IUCN). Yet populations in southeaster ...
... Goliath grouper (Epinephelus itajara), a large reef fish with populations in tropical Atlantic waters, is vulnerable to overexploitation and local extinction and is classified as critically endangered throughout most of its range by the World Conservation Union (IUCN). Yet populations in southeaster ...
Carp (Cyprinus carpio L.) impacts and recruitment in Australian
... exists, other strategies are required (CCCG 2000a; Clunie et al. 2002). Many options for Carp control and exclusion (e.g, physical removal, screens, poisoning and lake drawdown) are methods that can be applied for local populations (e.g., see Roberts and Ebner 1997; Koehn et al. 2000). However, none ...
... exists, other strategies are required (CCCG 2000a; Clunie et al. 2002). Many options for Carp control and exclusion (e.g, physical removal, screens, poisoning and lake drawdown) are methods that can be applied for local populations (e.g., see Roberts and Ebner 1997; Koehn et al. 2000). However, none ...
INTERCAFE Case Study Report
... and 16 stakeholders, representing 11 institutions or organisations. Successful conflict management depends on conflicting parties opening communication channels and developing networks of trust for effective collaboration and dialogue. REDCAFE thus worked closely during the Workshop with a facilitat ...
... and 16 stakeholders, representing 11 institutions or organisations. Successful conflict management depends on conflicting parties opening communication channels and developing networks of trust for effective collaboration and dialogue. REDCAFE thus worked closely during the Workshop with a facilitat ...
Michigan Department of Natural Resources 2008-56 Status of the Fishery Resource Report
... largemouth) in 1984 was very similar to that represented in more recent fish surveys (Table 5). Largemouth bass up through 20 inches were collected while the less abundant smallmouth bass could reach similar maximum lengths. The panfish population, consisting primarily of bluegill, pumpkinseeds, roc ...
... largemouth) in 1984 was very similar to that represented in more recent fish surveys (Table 5). Largemouth bass up through 20 inches were collected while the less abundant smallmouth bass could reach similar maximum lengths. The panfish population, consisting primarily of bluegill, pumpkinseeds, roc ...
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.