Northern Area Fisheries Advisory Committee 5th January, 1981

This is the report from the Northern Area Fisheries Advisory Committee meeting, which was held on the 5th January, 1981. It covers information on the review of fisheries byelaws, netting off Flimby Beach and the review of a net limitation order which was due to expire. It also includes the report by the area fisheries officer on fisheries activities which comments on river conditions and fishing for salmon, sea trout and brown trout, and the recorded numbers of fish which passed through Yearl Weir fish counter up to the 9th November. Also covered in the report is an update on Holmwrangle hatchery and the stocking numbers of salmon, sea trout and non migratory trout by the Water Authority. Finally the report adds about fish disease, biological work and the considerations of the River Caldew as a migratory fish river. The Fisheries Advisory Committee was part of the Regional Water Authorities, in this case the North West Water Authority. This preceded the Environment Agency which came into existence in 1996.

Central Area Fisheries Advisory Committee 8th January, 1981

This is the report from the Central Area Fisheries Advisory Committee meeting, which was held on the 8th January, 1981. It covers information on the review of fisheries byelaws, netting off Flimby beach, a large fish mortality in the River Calder and Ribble, and the review of a net limitation order which was due to expire. It also includes the stocking of Worthington Lakes, Rivington Group Reservoirs and the River Wyre, the update on the proposals for the development of angling at Stocks Reservoir and the report by the area fisheries officer on fisheries activities. This comments on river conditions and fishing for salmon, sea trout and brown trout, and migratory fish movement. Also covered in the report is an update on Middleton Hatchery, salmon cages in the River Leven, Langcliffe Hatchery and the pilot hatchery, and stocking numbers of coarse fish and non migratory trout by the Angling Associations. Finally the report adds about fish mortalities, fish disease, poaching and management work. The Fisheries Advisory Committee was part of the Regional Water Authorities, in this case the North West Water Authority. This preceded the Environment Agency which came into existence in 1996.

Lune, Wyre & Furness Fisheries Advisory Committee 13th December, 1979.

This is the report from the Lune, Wyre and Furness Fisheries Advisory Committee meeting, which was held on the 13th December 1979. The report contains the minutes of the last meeting along with the minutes of the Regional Fisheries Advisory Committee held on 12th November 1979. It also includes net limitation order and fisheries byelaws for the River Lune and River Wyre. The Fisheries Advisory Committee was part of the Regional Water Authorities, in this case the North West Water Authority. This preceded the Environment Agency which came into existence in 1996.

Regional Fisheries Advisory Committee 4th February, 1980.

This is the report from the Regional Fisheries Advisory Committee meeting, which was held on the 4th February 1980. The report contains the minutes of the Local Fisheries Advisory Committees, net and fixed engine licence duties, net limitation order for the River Lune and River Wyre and fishery byelaws for the River Lune. The Fisheries Advisory Committee was part of the Regional Water Authorities, in this case the North West Water Authority. This preceded the Environment Agency which came into existence in 1996.

Northern Area Fisheries Advisory Committee 29th March, 1982

This is the report from the Northern Area Fisheries Advisory Committee meeting, which was held on the 29th March, 1982. It includes information on the Cumbrian Coastal Waters Net Limitation order, and the report by the area fisheries officer on fisheries activites from September 1981 to January 1982. The report covers information on river conditions and fishing, migratory fish movement, an update on the work at Holmwrangle Hatchery, fish disease, management and survey work and monthly salmon and sea trout catches for rod, line, nets and fixed engines for the 1981 season. The Fisheries Advisory Committee was part of the Regional Water Authorities, in this case the North West Water Authority. This preceded the Environment Agency which came into existence in 1996.

Regional Fisheries Advisory Committee 31st January, 1983

This is the report from the Regional Fisheries Advisory Committee meeting, which was held on the 31st January, 1983. The report contains sections on Draft net licences (Rivers Derwent and Ellen estuaries), net limitation order, proposed pike ranching scheme on Esthwaite Water, Diseases of fish bill, outbreak of Whirling disease, and the control of federal mink. The Fisheries Advisory Committee was part of the Regional Water Authorities, in this case the North West Water Authority. This preceded the Environment Agency which came into existence in 1996.

Regional Fisheries Advisory Committee 21st October, 1985

This is the report from the Regional Fisheries Advisory Committee meeting, which was held on the 21st October, 1985. The report contains sections on River Lune Special Byelaws, proposed haaf net limitation order for the Solway Firth and lead poisoning in swans. Also included is information on River Kent fish passes, reservoirs, total available Residual Chlorine (TARC) in the River Lune, fish hatcheries, and Authority investigations into acidity problems in rivers in Cumbria. The Fisheries Advisory Committee was part of the Regional Water Authorities, in this case the North West Water Authority. This preceded the Environment Agency which came into existence in 1996.

Regional Fisheries Advisory Committee 3rd November, 1986

This is the report from the Regional Fisheries Advisory Committee meeting, which was held on the 3rd November, 1986. The report contains sections on a proposed Haaf Net Limitation order, Salmon and Freshwater Fisheries in the Solway Firth, Ullswater Freshet pumping station, and Authority investigations into Acidity Problems in North West water. Also included is information on commercial salmon fishing in the River Lune and coarse fish close season in enclosed waters. The Fisheries Advisory Committee was part of the Regional Water Authorities, in this case the North West Water Authority. This preceded the Environment Agency which came into existence in 1996.

Regional Fisheries Advisory Committee 14th September, 1987

This is the report from the Regional Fisheries Advisory Committee meeting, which was held on the 14th September, 1987. The report contains information on Haweswater hatchery, River Eden draft netting, Fishery Byelaws, Haaf Net Limitation Order for the Solway Firth, Sea Fisheries Byelaws, River Caldew Weirs, serious fish mortalities, and the abolition of the coarse fish close season in enclosed waters. The section on River Caldew Weirs looks at the construction of fish passes at three weirs on the River Caldew to let migratory fish species reach the upper parts of the river. The section on serious fish mortalities covers information on the River Weaver, three pools system in Southport, Macclesfield Canal in Congleton, and River Eden, Appleby. The Fisheries Advisory Committee was part of the Regional Water Authorities, in this case the North West Water Authority. This preceded the Environment Agency which came into existence in 1996.

Regional Fisheries Advisory Committee 20th February, 1989

This is the report from the Regional Fisheries Advisory Committee meeting, which was held on the 20th February, 1989. The report contains sections on fishing licence duties, Ombudsman’s Report, net licence allocation criteria, renewal of the Lune and Wyre net limitation order and fishery byelaws. The section on Ombudsman’s Report looks at the complaint against the Authority relating to the allocation of haaf net licences for the Solway Firth for 1988. The Fisheries Advisory Committee was part of the Regional Water Authorities, in this case the North West Water Authority. This preceded the Environment Agency which came into existence in 1996.

Increased toxicity of Karenia brevis during phosphate limited growth: ecological and evolutionary implications

Karenia brevis is the dominant toxic red tide algal species in the Gulf of Mexico. It produces potent neurotoxins (brevetoxins [PbTxs]), which negatively impact human and animal health, local economies, and ecosystem function. Field measurements have shown that cellular brevetoxin contents vary from 1–68 pg/cell but the source of this variability is uncertain. Increases in cellular toxicity caused by nutrient-limitation and inter-strain differences have been observed in many algal species. This study examined the effect of P-limitation of growth rate on cellular toxin concentrations in five Karenia brevis strains from different geographic locations. Phosphorous was selected because of evidence for regional P-limitation of algal growth in the Gulf of Mexico. Depending on the isolate, P-limited cells had 2.3- to 7.3-fold higher PbTx per cell than P-replete cells. The percent of cellular carbon associated with brevetoxins (%C-PbTx) was ~ 0.7 to 2.1% in P-replete cells, but increased to 1.6–5% under P-limitation. Because PbTxs are potent anti-grazing compounds, this increased investment in PbTxs should enhance cellular survival during periods of nutrient-limited growth. The %C-PbTx was inversely related to the specific growth rate in both the nutrient-replete and P-limited cultures of all strains. This inverse relationship is consistent with an evolutionary tradeoff between carbon investment in PbTxs and other grazing defenses, and C investment in growth and reproduction. In aquatic environments where nutrient supply and grazing pressure often vary on different temporal and spatial scales, this tradeoff would be selectively advantageous as it would result in increased net population growth rates. The variation in PbTx/cell values observed in this study can account for the range of values observed in the field, including the highest values, which are not observed under N-limitation. These results suggest P-limitation is an important factor regulating cellular toxicity and adverse impacts during at least some K. brevis blooms.

Reproductive engineering in crustacean aquaculture

Crustacean aquaculture industry in India suffers greatly from lack of technological developments. A major constraint in this enterprise is the limitation of seed stock availability. A critical appraisal is made of the techniques used in the manipulation of reproductive processes in order to augment year-round production of seeds. A new possibility of induced ovarian maturation in crustaceans is by administering steroid hormones of vertebrate source. Environmental factors are known to govern the gametogenic cycle of marine crustaceans. Cryopreservation of male gametes and artificial insemination by way of spermatophore transfer could solve some of the problems of mating under laboratory conditions.