Results 21 to 30 of about 119,873 (309)

Perch Positioning Affects both Laying Hen Locomotion and Forces Experienced at the Keel

open access: yesAnimals, 2020
The aim of this study was to assess the effect of perch positioning on laying hens’ locomotion and the resulting energy experienced at the keel. Twenty Nick Chick and 20 Brown Nick hens were trained to transition from a platform to a perch in several ...
Christina Rufener   +3 more
doaj   +1 more source

Expansion of sweet taste receptor genes in grass carp (Ctenopharyngodon idellus) coincided with vegetarian adaptation

open access: yesBMC Evolutionary Biology, 2020
Background Taste is fundamental to diet selection in vertebrates. Genetic basis of sweet taste receptor in the shaping of food habits has been extensively studied in mammals and birds, but scarcely studied in fishes.
Xiao-Chen Yuan   +5 more
doaj   +1 more source

The importance of the choice of test for finding evidence of asymmetric information [PDF]

open access: yes, 2014
We put one of the predictions of adverse-selection models to the test, using data from the Danish automobile insurance market: that there is a positive correlation between claims risk and insurance coverage.
Donnelly, Catherine   +2 more
core   +1 more source

Domestication drive the changes of immune and digestive system of Eurasian perch (Perca fluviatilis). [PDF]

open access: yesPLoS ONE, 2017
Domestication has altered a variety of traits within the Eurasian perch (Perca fluviatilis), including phenotypic, physiological and behavioral traits of Eurasian perch (Perca fluviatilis).
Xiaowen Chen   +7 more
doaj   +1 more source

Structural indices of the European perch (Perca fluviatilis Linnaeus, 1758) population in the Kremenchuk reservoir

open access: yesRibogospodarsʹka Nauka Ukraïni, 2022
Objective. Analysis of the structural parameters of the perch (Perca fluviatilis L.) population in the Kremenchuk Reservoir in the world of the development of the program of stocking large flat reservoirs of the Dnipro with juveniles of Far Eastern ...
M. Leuskyy   +4 more
doaj   +1 more source

Managing Nile perch using slot size: is it possible? [PDF]

open access: yes, 2009
The fishery of Lake Victoria became a major commercial fishery with the introduction of Nile perch in 1950s and 1960s. Biological and population characteristics point to a fishery under intense fishing pressure attributed to increased capacity and use of
Getabu, A.   +5 more
core   +1 more source

Monitoring of invasions of family Percidae in the Volga-Caspian fishery basin

open access: yesТрансформация экосистем, 2023
This paper presents long-term data on the occurrence of parasites of commercially valuable fish species, the common zander (Sander lucioperca (Linnaeus, 1758)) and the perch (Perca fluviatilis Linnaeus, 1758).
Elena Voronina   +2 more
doaj   +1 more source

More than a Game: Baseball and Southern Textile Communities 1880-1935 [PDF]

open access: yes, 2018
While labor unrest itself is no stranger to American history, the strikes across the Piedmont textile industry in 1934 present a curious case. Throughout the conflict, a sizeable portion of the workers remained loyal to their companies and those who ...
Perch, Aaron
core   +1 more source

Arrhythmic perch hopping and rhythmic feeding of starlings in constant light: Separate circadian oscillators? [PDF]

open access: yes, 1984
Perch hopping activity and food intake were recorded in starlings in different intensities of continuous illumination (LL), varying from 0.1 to 1000 lux. Circadian rhythmicity in perch hopping disappeared in 10 lux and all higher intensities. In contrast,
Daan, S.,   +2 more
core   +2 more sources

Anti‐Slip Material‐Based Strategies and Approaches

open access: yesAdvanced Materials Technologies, EarlyView.
This review highlights the principle mechanisms of slipping at the microscale, linking contact mechanics with a friction behavior model for surface interfaces. Main strategies to develop anti‐slip properties to the surfaces are discussed alongside standardized testing approaches.
Sogand Abbaspoor‐Zanjani   +3 more
wiley   +1 more source

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