Results 91 to 100 of about 56,832 (280)

Reproductive Cycle in Salmo Salar Linn [PDF]

Nature, 1939
IT is known that in Salmo salar Linn. there occurs regularly a very small percentage, possibly of the order of 0·1 per cent, of mature female fish in which discharge of ova may be delayed or does not take place. Such fish are found many months after the normal spawning time heavy with ripe ova. In certain parts of Scotland they are termed ‘baggots’ or ‘
openaire   +1 more source

Effects of the Invasive Round Goby on Swedish Recreational Fishing Values

Fisheries Management and Ecology, EarlyView.
ABSTRACT The round goby, an invasive fish from the Black and Caspian Seas, has spread to Swedish waters, threatening recreational fisheries. We modeled impacts on the future recreational fishery in Sweden using data from a recreational fishing survey, and estimated effects of the round goby on other fish species. Values attached to recreational fishing
Göran Bostedt, Ola Carlén, Rahmat Naddafi, Ann‐Britt Florin   +3 more
wiley   +1 more source

Factors associated with changing efficacy of emamectin benzoate against infestations of Lepeophtheirus salmonison Scottish salmon farms [PDF]

, 2008
The availability and use of medicines to control infestations of sea lice on Atlantic salmon, Salmosalar L., farms in Scotland has changed considerably in the last decade (Lees, Gettinby & Revie 2008b).
Denholm, Gustafson, Lees, Lees, Saksida, Stone, Stone, Treasurer, Westcott   +8 more
core   +1 more source

Impact of Environmental Conditions on the Spawning Migration of Sea Trout (Salmo trutta L.) in Two Large, Sub‐Arctic River Systems

Fisheries Management and Ecology, EarlyView.
ABSTRACT The global decline in salmonid stocks has increased the need for knowledge of local adaptations and life history strategies of salmonids. In this study, we used radio‐telemetry tracking data from sea trout populations in two large high‐latitude rivers to model upstream spawning migration speed of trout in response to prevailing environmental ...
L. Lähteenmäki, A. Romakkaniemi, R. Huusko, G. Hellström, P. Orell, J. Erkinaro, A. H. Rikardsen, J. Jensen, M. Snickars   +8 more
wiley   +1 more source

Interactions between parental traits, environmental harshness and growth rate in determining telomere length in wild juvenile salmon [PDF]

, 2016
A larger body size confers many benefits, such as increased reproductive success, ability to evade predators and increased competitive ability and social status. However, individuals rarely maximise their growth rates, suggesting that this carries costs.
Armstrong, J.D., Boner, W., Mckelvey, S., McLennan, D., Metcalfe, N.B., Monaghan, P., Stewart, D.C.   +6 more
core   +2 more sources

Genetic and Ecological Management of Pacific Salmon Fisheries for the 21st Century

Fisheries Management and Ecology, EarlyView.
ABSTRACT Based on ecological adaptation theory, tremendous effort is being spent on measures that are eliminating salmon hatcheries and fishing opportunities with the intention of protecting wild runs deemed to be of particular genetic importance to the survival of the species.
Randall E. Brummett, Ian G. Cowx, Devin M. Bartley   +2 more
wiley   +1 more source

Integrative testis transcriptome analysis reveals differentially expressed miRNAs and their mRNA targets during early puberty in Atlantic salmon

BMC Genomics, 2017
Background Our understanding of the molecular mechanisms implementing pubertal maturation of the testis in vertebrates is incomplete. This topic is relevant in Atlantic salmon aquaculture, since precocious male puberty negatively impacts animal welfare ...
K. O. Skaftnesmo, R. B. Edvardsen, T. Furmanek, D. Crespo, E. Andersson, L. Kleppe, G. L. Taranger, J. Bogerd, R. W. Schulz, A. Wargelius   +9 more
doaj   +1 more source

Acute freshwater CO2 exposure does not impair seawater transfer in three different sizes of Atlantic salmon (Salmo salar) subjected to different photoperiod manipulations

Journal of Fish Biology, EarlyView.
Abstract There is a growing interest in Atlantic salmon (Salmo salar) aquaculture to extend the time fish are reared in freshwater (FW) recirculating aquaculture systems (RAS), producing larger FW salmon that can then be induced to undergo smoltification before transfer into marine net pens for grow‐out and harvest.
Le Thi Hong Gam, Daniel W. Montgomery, Daniel S. Laronde, Rachael Mackinnon, Jeffrey G. Richards, Colin J. Brauner   +5 more
wiley   +1 more source

Coping styles in farmed fish: consequences for aquaculture [PDF]

, 2017
Individual differences in physiological and behavioural responses to stressors are increasingly recognised as adaptive variation and thus raw material for evolution and fish farming improvements including selective breeding. Such individual variation has
Begout, Marie-Laure, Castanheira, Maria Filipa, Conceicao, Luis, Damsgard, Borge, Hoglund, Erik, Kristiansen, Tore, Martins, Catarina, Millot, Sandie, Overli, Oyvind, Rey, Sonia   +9 more
core   +4 more sources

Transcriptomic profiling of gill biopsies to define predictive markers for seawater survival in farmed Atlantic salmon

Journal of Fish Biology, EarlyView.
Abstract Wild Atlantic salmon migrate to sea following completion of a developmental process known as parr‐smolt transformation (PST), which establishes a seawater (SW) tolerant phenotype. Effective imitation of this aspect of anadromous life history is a crucial aspect of commercial salmon production, with current industry practice being marred by ...
Lars Grønvold, Mattis J. van Dalum, Anja Striberny, Domniki Manousi, Trine Ytrestøyl, Turid Mørkøre, Solomon Boison, Bjarne Gjerde, Even Jørgensen, Simen R. Sandve, David G. Hazlerigg   +10 more
wiley   +1 more source