Eden and District Fisheries Advisory Committee 29th June, 1976.

This is the report from the Eden and District Fisheries Advisory Committee meeting, which was held on the 29th June, 1976. The report contains sections on fisheries activities and validity of Rod Licences. The section on fisheries activities during the period 13th January-3rd March includes fishing and coarse fish; stocking; biological surveys; mortalities; poaching; scale reading and a report on salmon scale return in the River Eden. The section on fisheries activities during the period 3rd March-23th May includes a general report of the Eden and District fisheries; fish kills; stocking; fish transfer/rescue; obtaining of ova, fry rearing; and fry stocking. 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.

South & West Cumberland Fisheries Advisory Committee 28th June, 1976.

This is the report from the South and West Cumberland Fisheries Advisory Committee meeting, which was held on the 28th June, 1976. The report contains sections on Branthwaite Weir and fisheries activities. The section on fisheries activities during the period 13th January-2nd March includes stocking; biological surveys; fish mortalities; hatcheries and redd counting. The section on fisheries activities during the period 2nd March-20th May includes a general report of the area; fry stocking/rearing; River works (River Ehen, Calder, Derwent, and Glenderamackin); coarse fish removal; and fish transfers. 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.

Mersey and Weaver Fisheries Advisory Committee 11th April, 1979

This is the report from the Mersey and Weaver Fisheries Advisory Committee meeting, which was held on the 11th April, 1979. It includes the report by the area fisheries officer on fisheries activities which comments on river conditions and fishing, and an update on Hollingworth hatchery giving numbers of rainbow and brown trout being developed, and Great Sankey giving an update on coarse fish rearing. It also gives stocking numbers of coarse and non migratory fish by angling assoications, fisheries management and pollution incidents. 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 2nd July, 1979.

This is the report from the Lune, Wyre and Furness Fisheries Advisory Committee meeting, which was held on the 2nd July 1979. The report contains sections on trial arrangements for canoeing on the River Lune at Halton during the salmon fishing season, and fishing offences and prosecutions for 1978/1979. Also included is the report by the area fisheries officer which looks at river conditions and fishing in the Rivers Lune, Furness and Wyre, the count of fish by monitoring stations, Hiddleton hatchery, cage rearing of smolts for the River Leven, stocking by the Angling Associations and Authority, fish mortalities and the removal of perch by Furness Fishing Association. 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 30th June, 1980

This is the report from the Lune, Wyre and Furness Fisheries Advisory Committee meeting, which was held on the 30th June, 1980. It 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 Duddon Hall, Haverthwaite, Halton, Broadraine and Basinghyll fish counters. Also covered in the report is an update on Middleton Hatchery which includes the numbers of salmon, sea trout and brown trout fry planted for various waters including the Lune, Keer, Duddon and Kent Catchment, and an update on the cage rearing of smolts for the River Leven. Finally the report adds fish mortalities, the pipeline project with the British Gas Corporation and the Rivers Leven and Kent fish distribution survey map. 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 11th October, 1979.

This is the report from the Lune, Wyre and Furness Fisheries Advisory Committee meeting, which was held on the 11th October 1979. The report contains the minutes of the last meeting along with the minutes of the Regional Fisheries Advisory Committee meeting held on 12th July 1979, information on pollution and fish mortalities in the River Conder, and net limitation order and fisheries byelaws for the River Lune and Wyre. It also includes the report by the area fisheries officer which looks at river conditions and fishing in the Rivers Lune, Furness and Wyre, fish monitoring at Forge Weir, Broadraine and Skerton Weir stations, and an update on Middleton Hatchery. Also covered is the cage rearing of smolts for the River Leven, stocking by the Water Authority and Angling Associations, fish mortalities and biological work carried out at Barrow Steel Works. 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 10th January, 1980.

This is the report from the Lune, Wyre and Furness Fisheries Advisory Committee meeting, which was held on the 10th January 1980. The report contains sections on the minutes of the Special Meeting held on 13th December 1979, net and fixed engine licence duties, the EEC Directive on the quality of freshwaters and terminated angling leases. It also includes the report by the area fisheries officer which looks at river conditions and fishing, fish monitoring at Broadraine, Skerton, Haverthwaite and Duddon Hall stations, and an update on Middleton hatchery. Also covered in the report is an update on the cage rearing of salmon smolts for the River Leven, stockings carried out by the Water Authority, and information on fish disease, fish spawning and net catch figures for 1979. 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 10th April, 1980.

This is the report from the Lune, Wyre and Furness Fisheries Advisory Committee meeting, which was held on the 10th April 1980. The report contains the minutes of previous meetings, information regarding rod and line licence duties, the pipeline project by British Gas Corporation, fisheries byelaws, a survey of goosanders and mergansers and information on Pedder Pots reservoir. It also includes the report by the area fisheries officer which looks at river conditions and fishing, an update on Middleton Hatchery and the cage rearing of smolts for the River Leven. It also covers stockings carried out by Angling Associations, U.D.N. fish disease and monthly salmon and sea trout catches for the 1979 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.

Central Area Fisheries Advisory Committee 31st March, 1982

This is the report from the Central Area Fisheries Advisory Committee meeting, which was held on the 31st March, 1982. It includes information on the River Leven smolt rearing scheme, the annual report on match fishing at Skerton and Mitton fisheries, 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 movements, an update on the work at Middleton hatchery, Salmon cages on the Leven and Langcliffe hatchery. It also includes information on fish disease, fish mortalities, management 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 Meeting 30th January, 1984

This is the report from the Regional Fisheries Advisory Committee meeting, which was held on the 30th January, 1984. The report contains information on the use of fyke nets and an application to use Rotenone fish Toxicant. Also included is information on Dunsop Trout Farm and the establishment of migratory fish rearing facilities, the decline of salmon and sea trout catches in South Cumbria, and the decline of salmon stocks in the River Eden. 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.

The larval stages of the calanoid copepod Eurytemora hirundoides (Nordquist)

Most Copepoda pass through, first, a series of nauplius stages, and then through a series of copepodid stages (or cyclops stages), in which the general form of the adult is assumed. ... In the first place, the differentiation between the larvae of the various copepod species to be found in the plankton, both marine and fresh water, greatly augments the value and accuracy of quantitative and qualitative plankton analyses, because many species spend a large portion of their life span in an immature condition. In the second place, the taxonomy of the Copepoda is admittedly not completely satisfactory ...

The food habits of hatchery-produced pond-cultured shad (Alosa sapidissima) reared to a length of two inches

The present study was aimed at determining the food habits of hatchery-produced, pond-cultured shad (Alosa sapidissima) reared to a total length of approximately two inches. More specifically, the objectives were to determine: (1) That point in life at which young shad start to consume food; (2) What type or types of food the young shad consume at the onset of feeding; (3) Food changes, if any, which occur with age and growth in size up to the arbitrarily designated total length of two inches. The plan was that the shad larvae be introduced into an outdoor rearing pond previously fertilized, and that the larvae be dependent upon the plankton for food as they would be under natural conditions.

Staging ovaries of Haddock (Melanogrammus aeglefinus): implications for maturity indices and field sampling practices

We build on recent efforts to standardize maturation staging methods through the development of a field-proof macroscopic ovarian maturity index for Haddock (Melanogrammus aeglefinus) for studies on diel spawning periodicity. A comparison of field and histological observations helped us to improve the field index and methods, and provided useful insight into the reproductive biology of Haddock and other boreal determinate fecundity species. We found reasonable agreement between field and histological methods, except for the regressing and regenerating stages (however, differentiation of these 2 stages is the least important distinction for determination of maturity or reproductive dynamics). The staging of developing ovaries was problematic for both methods partly because of asynchronous oocyte hydration during the early stage of oocyte maturation. Although staging on the basis of histology in a laboratory is generally more accurate than macroscopic staging methods in the field, we found that field observations can uncover errors in laboratory staging that result from bias in sampling unrepresentative portions of ovaries. For 2 specimens, immature ovaries observed during histological examination were incorrectly assigned as regenerating during macroscopic staging. This type of error can lead to miscalculation of length at maturity and of spawning stock biomass, metrics that are used to characterize the state of a fish population. The revised field index includes 3 new macroscopic stages that represent final oocyte maturation in a batch of oocytes and were found to be reliable for staging spawning readiness in the field. The index was found to be suitable for studies of diel spawning periodicity and conforms to recent standardization guidelines.

Changes in size and age at maturity of the northern stock of Tilefish (Lopholatilus chamaeleonticeps) after a period of overfishing

The modern fishery for Tilefish (Lopholatilus chamaeleonticeps) developed during the 1970s, offshore of southern New England, in the western North Atlantic Ocean. The population quickly became over exploited, with documented declines in catch rates and changes in demographic traits. In an earlier study, median size at maturity (L50) of males declined from 62.6 to 38.6 cm fork length (FL) and median age at maturity (A50) of males declined from 7.1 to 4.6 years between 1978 and 1982. As part of a cooperative research effort to improve the data-limited Tilefish assessment, we updated maturity parameter estimates through the use of an otolith aging method and macroscopic and microscopic evaluations of gonads. The vital rates for this species have continued to change, particularly for males. By 2008, male L50 and A50 had largely rebounded, to 54.1 cm FL and 5.9 years. Changes in female reproductive schedules were less variable among years, but the smallest L50 and youngest A50 were recorded in 2008. Tilefish are dimorphic, where the largest fish are male, and male spawning success is postulated to be socially mediated. These traits may explain the initial rapid decline and the subsequent rebound in male L50 and A50 and less dramatic effects on females. Other factors that likely contribute to the dynamics of maturity parameter estimates are the relatively short period of overfishing and the amount of time since efforts to rebuild this fishery began, as measured in numbers of generations. This study also confirms the gonochoristic sexual pattern of the northern stock, and it reveals evidence of age truncation and relatively high proportions of immature Tilefish in the recent catch.

Using measurements of muscle cell nuclear RNA with flow cytometry to improve assessment of larval condition of Walleye Pollock (Gadus chalcogrammus)

Nuclear RNA and DNA in muscle cell nuclei of laboratory-reared larvae of Walleye Pollock (Gadus chalcogrammus) were simultaneously measured through the use of flow cytometry for cell-cycle analysis during 2009–11. The addition of nuclear RNA as a covariate increased by 4% the classification accuracy of a discriminant analysis model that used cell-cycle, temperature, and standard length to measure larval condition, compared with a model without it. The greatest improvement, a 7% increase in accuracy, was observed for small larvae (<6.00 mm). Nuclear RNA content varied with rearing temperature, increasing as temperature decreased. There was a loss of DNA when larvae were frozen and thawed because the percentage of cells in the DNA synthesis cell-cycle phase decreased, but DNA content was stable during storage of frozen tissue.