First feeding diet of young brown trout fry in a temperate area: disentangling constraints and food selection

@article{SnchezHernndez2010FirstFD,
  title={First feeding diet of young brown trout fry in a temperate area: disentangling constraints and food selection},
  author={J. S{\'a}nchez-Hern{\'a}ndez and R. Vieira-Lanero and M. J. Servia and F. Cobo},
  journal={Hydrobiologia},
  year={2010},
  volume={663},
  pages={109-119}
}
Diet composition of newly emerged brown trout fry in natural areas remains poorly known, and foraging abilities at this early stage, although presumably reduced, are still under discussion. We have studied gut content composition of brown trout fry in a temperate area (Galicia, NW Spain) and compared it to the benthic macroinvertebrate community. Small prey such as chironomid larvae and baetid nymphs were the most important food items for newborns, some of them still presenting yolk remnants… Expand

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References

SHOWING 1-10 OF 56 REFERENCES
Feeding pattern and diet of first feeding brown trout fry under natural conditions
TLDR
The feeding habits of brown trout Salmo trutta fry were studied during the critical first feeding period in a natural spawning and nursery stream, and revealed that feeding was more efficient after a territory had been acquired. Expand
Diet and Prey Selectivity by Age-0 Brown Trout (Salmo Trutta L.) in Different Lowland Streams of Lithuania
TLDR
The diet of 82 brown trout individuals was described for the purpose of registering the number and frequency of prey objects per fish, and their selection of invertebrate fauna. Expand
Ontogeny of feeding in two native and one alien fish species from the Murray-Darling Basin, Australia
TLDR
It is suggested that survival through their larval period will be threatened in all three species if catchable prey <500 µm in width are not available throughout such time and interspecific competition for prey may occur, especially when larvae are very young. Expand
Seasonal growth and diet of juvenile chinook salmon (Oncorhynchus tshawytscha) in demonstration channels and the main channel of the Waitaki River, New Zealand, 1982–1983
– Juvenile chinook salmon in the Waitaki River, New Zealand and demonstration channels, living at about 16°C, increased in length by 0.32 mm day−1 between 4 November and 4 March. They gained weightExpand
Ontogenetic dietary shifts of fishes in an Australian floodplain river
TLDR
Despite two co-occurrences of an introduced and a native species using the same rearing habitat as larvae, dietary preferences did not significantly overlap, suggesting that a recruitment bottleneck caused by competition for food resources is unlikely for these species. Expand
Prey-size selection by brown trout (Salmo trutta L.) in a stream in northern Spain
TLDR
It is suggested that trout were switching, i.e., overexploiting the most abundant prey, because of perceptual limitations mediated by large differences in relative abundance of the different size classes of terrestrial prey. Expand
Prey selection by young trout fry (Salmo trutta)
TLDR
Prey size was of importance in the distribution of stream benthos among predators of different lengths and the width of the prey was of greater significance to selection than the mean volume or the area of the largest surface of the food items. Expand
Diet of 0+ brown trout (Salmo trutta L., 1758) from the river Erro (Navarra, north of Spain)
TLDR
Fingerling brown trout seems to act as an opportunistic predator, and the consumption of different preys seems to be influenced by their accessibility, predation risk, and their energetic value. Expand
Allometry of diet selectivity in juvenile Atlantic salmon (Salmo salar)
TLDR
The allometry of this size-selective foraging in juvenile Atlantic salmon, Salmo salar of Catamaran Brook, New Brunswick, was described, with findings that newly emerged salmon fed on smaller prey than the average available in the drift, whereas salmon larger than 4.6 cm fed on larger prey than average, primarily dipteran adults and pupae. Expand
Variability in performance in wild Atlantic salmon, Salmo salar L., fry from a single redd
TLDR
Individual salmon fry differ in physical status on emergence from the redd and these differences are amplified during the first few weeks after emergence, and for individually recognised fry, growth rates varied markedly. Expand
...
1
2
3
4
5
...