Results 81 to 90 of about 9,140 (253)
Disruption of natural disturbance regime decouples habitat and life stage in a keystone species
EcosphereAnthropogenic disturbance of stream ecosystems, often chronic in nature, has been studied extensively. However, when disturbance is driven by more than one resource policy over many decades, feedback between habitat evolution and biological adaptation ...
Joseph E. Merz +3 more
doaj +1 more source
Acta Scientiarum: Biological Sciences, 2017 The construction of the Itaipu Hydroelectric Power Plant in 1982 led to the formation of a reservoir, which, in turn, leveled the waters of the Paraná River by flooding the geographic barrier Salto de Sete Quedas.
Gabriele Sauthier Romano de Melo +2 more
doaj +1 more source
Journal of Applied Toxicology, EarlyView.ABSTRACT Lambda‐cyhalothrin is a synthetic pyrethroid insecticide widely used in agriculture, but its potential to contaminate aquatic ecosystems and exert high toxicity on fish at low concentrations raises ecotoxicological concerns. While standard histopathological and biochemical assessments are common, the novel integration of pigment‐based ...
Carlos Eurico Fernandes +7 more
wiley +1 more source
Marine and Coastal Fisheries, 2011 Abstract We present a method for estimating the interspawning interval (ISI) in batch-spawning teleosts with indeterminate fecundity based on the rate of oocyte growth and the size of oocytes at the beginning and end of the spawning cycle.
Konstantinos Ganias +4 more
openaire +1 more source
Concordance Between MR Safety Guidance Documents on Conditions for a Safe MR Environment
Journal of Magnetic Resonance Imaging, EarlyView.ABSTRACT Background Environmental conditions established at facility design, construction, updates, and/or procurement of specialized equipment are the foundation of safe MR practice. Establishing an institutional MR safety program must take into consideration the conditions of the MR environment, and staff training should be tailored to its features ...
Ives R. Levesque +3 more
wiley +1 more source
First reproductive data from the F1 generation of the Amazonian killifish Anablepsoides ornatus [PDF]
Acta AmazonicaWe provide initial findings on reproductive performance of the poorly known killifish, Anablepsoides ornatus, from the Rio Negro basin. We recorded fecundity, spawning frequency, egg diameter, fertilization rate, duration of embryonic development, and ...
Thiago Lima de CARVALHO +3 more
doaj +1 more source
Journal of Organizational Behavior, EarlyView.ABSTRACT We study the phenomenon of ambivalence to lead, characterized as leaders' experience of mixed feelings (positive and negative) toward their leadership position. We do so by integrating the beneficial role of dualities with the affect‐as‐information theory.
Liat Eldor
wiley +1 more source
Investigation on feeding habit of common carp, Cyprinus carpio, in Anzali Wetland and its relationship to maturity status in spawning season [PDF]
بومشناسی آبزیان, 2019 The main aim of this study was to determine the feeding habit of common carp, Cyprinus carpio, during spawning season. 655 specimens were sampled o in Anzali wetland using electroshocker, monthly from October 2015 to March.
Keyvan Abbasi +3 more
doaj
Estimating Hierarchical Demand in Retail Operations
Journal of Operations Management, EarlyView.ABSTRACT A hierarchical structure over product attributes is a central input to many product assortment and inventory optimization models, yet no existing method can recover such structures from the aggregate sales data that retailers routinely collect.
Blair Flicker +3 more
wiley +1 more source
Land Degradation &Development, EarlyView.ABSTRACT Urban expansion has exerted both direct and indirect impacts on natural land and ecosystem services it supports, driven by increasing population and food demand, yet these underlying pathways remain insufficiently distinguished. Here, we quantified the losses of soil conservation services (water erosion regulation and sandstorm prevention) and
Shuai Liu +4 more
wiley +1 more source