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Book Status of Atlantic Salmon Salmo Salar in the Tabusintac River in 1999

Download or read book Status of Atlantic Salmon Salmo Salar in the Tabusintac River in 1999 written by Scott G. Douglas and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Stock Status of Atlantic Salmon Salmo Salar in the Tabusintac River in 1999

Download or read book Stock Status of Atlantic Salmon Salmo Salar in the Tabusintac River in 1999 written by S. G. Douglas and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Esgenoopetitj First Nation and the recreational angling community harvested Atlantic salmon from the Tabusintac River in 1999. First Nation food fishery removals of small salmon and large salmon were 28% and 6% of the respective communal allocations. A telephone creel survey conducted for public water angling during the 1999 season, indicated that total bright salmon catches increased from 1998 but remain only 45% of the previous five year mean. Total catches in 1999 for both large and small salmon on leased water were 23% higher than in 1998 but 160% higher than the four year mean. Total returns of large salmon to the Tabusintac River in 1999 were estimated from a mark-recapture experiment using tags applied at an estuary trapnet and the catches and recaptures from an upstream trapnet. Most probable total returns of large salmon, generated by a Bayes algorithm, were estimated to be 900 fish. Total returns of small salmon were calculated from the estimate of large salmon returns and the combined capture efficiencies for large salmon observed at both trapnets in the current year. Total returns of small salmon were estimated to be 800n fish. After accounting for removals, large salmon spawning escapement was estimated to be 851 fish, which alone accounts for 237% of the conservation requirement. Small salmon spawning escapement was estimated to be 704 fish. Total estimated egg deposition was 250% of the conservation requirement. Egg deposition has exceeded the requirement in all assessed years and is expected to do so in 2000. Increased Atlantic salmon juvenile densities in 1999 are encouraging for the future of the resource.

Book Status of Atlantic Salmon Salmo Salar in the Buctouche River and Relative Juvenile Abundance in Other Southeastern New Brunswick Rivers in 1999

Download or read book Status of Atlantic Salmon Salmo Salar in the Buctouche River and Relative Juvenile Abundance in Other Southeastern New Brunswick Rivers in 1999 written by Gary Atkinson and published by . This book was released on 2000 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Status of Atlantic Salmon in the Tabusintac River in 1994

Download or read book Status of Atlantic Salmon in the Tabusintac River in 1994 written by G. Atkinson and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Ecology behaviour and conservation of the charrs genus Salvelinus

Download or read book Ecology behaviour and conservation of the charrs genus Salvelinus written by Pierre Magnan and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: Salvelinus species are one of the most thoroughly studied groups of fishes. Many reasons explain this intense interest in charr biology. Charrs have a Holarctic distribution encompassing many Asian, North American, and European countries and occupy diverse marine and freshwater environments. Furthermore, the current distribution of charr includes areas that were directly influenced by climate and topographic change associated with the many Pleistocene glaciations. Undoubtedly, these conditions have promoted much of the tremendous morphological, ecological, and genetic variability and plasticity within Salvelinus species and they make charr very good models to study evolutionary processes 'in action'. Many charr species also exhibit demographic characteristics such as slow growth, late maturity, and life in extreme environments, that may increase their susceptibility to extinction from habitat changes and overexploitation, especially in depauperate aquatic habitats. This vulnerability makes understanding their biology of great relevance to biodiversity and conservation. Finally, charr are of great cultural, commercial, and recreational significance to many communities, and their intimate linkage with human societies has stimulated much interest in this enigmatic genus. This volume comprises a selection of papers presented at the fourth International Charr Symposium held in Trois-Rivières (Québec, Canada), from 26 June to 1 July 2000. It includes 31 papers on ecological interactions and behaviour, trophic polymorphism, movement and migration, ecophysiology and evolutionary genetics, ecological parasitology, environmental stress and conservation. These studies cannot cover all recent developments in the ecology, behaviour and conservation of Salvelinus species, but collecting them into a special volume should bring attention to current research on this important genus and stimulate further work on Salvelinus species.

Book Status of Atlantic Salmon Salmo Salar in the Buctouche River in 1998

Download or read book Status of Atlantic Salmon Salmo Salar in the Buctouche River in 1998 written by and published by . This book was released on 1999 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to egg depositions well below conservation requirements in recent years, the angling season was closed and there was no First Nation allocation of salmon on the Buctouche River in 1998. A mark-recapture experiment was the basis for estimating returns: tags were applied at two estuarial trapnets and recovered at a counting fence in freshwater. Total large salmon returns were estimated at 102 and total small salmon returns at 92. Respective spawning escapements were 101 and 91. Total egg deposition was only 33% of the conservation requirement, representing a 52% decrease relative to 1997. Juvenile densities at the sites surveyed were generally higher than previous years but still well below optimum, confirming that spawning in recent years has been inadequate. At present, sufficient information on stock status has not been accumulated to forecast returns, but an analysis of various management scenarios indicates that even with all fisheries closed, there is only a 1% probability that conservation requirements will be met on the Buctouche River in 1999.

Book Stock Status of Atlantic Salmon Salmo Salar in the Buctouche River and Relative Juvenile Abundance in Other Southeastern New Brunswick Rivers in 1999

Download or read book Stock Status of Atlantic Salmon Salmo Salar in the Buctouche River and Relative Juvenile Abundance in Other Southeastern New Brunswick Rivers in 1999 written by Gary Atkinson and published by . This book was released on 2000 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to egg depositions well below the conservation requirement in recent years, the angling season was closed and there was no First nation allocation of salmon on the Buctouche River as of 1998. Salmon returns in 1999 were calculated from catches and known efficiency of an estuary trapnet operated by Buctouche First Nation. Total large salmon returns were estimated at 244 and total small salmon returns at 114, with respective spawning escapements of 244 and 111. Total egg deposition was estimated at 102% of the conservation requirement. This represents a tripling of the level in 1998, and the first instance in seven assessed years when the requirement may have been met. Juvenile densities on the Buctouche were well below optimum, especially for fry, confirming the low egg deposition observed in 1998. Results from a juvenile survey of four other southeastern New Brunswick rivers indicated that the level of spawning success has been variable and asynchronous. The variability, unpredictability and generally depressed status observed in the Buctouche stock appears to be characteristic of most rivers in the area, and a valid basis for the general management of stocks. The forecast for the Buctouche in 2000 is five year mean of total returns, which is 167 large and 106 for small salmon. With all retention fisheries closed there is only a 3% probability that the egg conservation requirement will be met in 2000.

Book Status of Atlantic Salmon in the Tabusintac River in 1993

Download or read book Status of Atlantic Salmon in the Tabusintac River in 1993 written by and published by . This book was released on 1994 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Tabusintac River flows east into the Gulf of St. Lawrence in north-east New Brunswick. This report assesses the Atlantic salmon stock in the river in 1993, based on recreational catch estimates, a mark-recapture experiment to estimate population size & spawning requirement, measured biological characteristics, and estimates of total returns, spawning escapement, & egg deposition. The results indicate whether spawning targets for small & large salmon were met.