Results 61 to 70 of about 197,269 (235)
Divergent vigilance strategies in sympatric seals facing shared predation risk
FACETSPredator–prey dynamics shape animal behaviour and distribution, and vary across space and time. As Arctic ecosystems change, long-standing ecological relationships may shift, yet species’ behavioural responses to changing predation pressure remain poorly
Katie R.N. Florko +2 more
doaj +1 more source
Haul-out behaviour, site fidelity and vigilance of common seals (Phoca vitulina) and grey seals (Halichoerus grypus) in the tees Estuary [PDF]
, 1994 The project was carried out from the beginning of May to the beginning of July 1994, at Seal Sands, in the Tees estuary. The study aimed to examine (i) ecological and (ii) behavioural aspects of two species of seals, common seals (Phoca vitulina) and ...
Gaspari, Stefania
core
Advanced Science, EarlyView.The promoted Escherichia coli‐assisted continuous evolution (PEACE) system operates through a stringent three step genetic circuit: target gene mutation via a deaminase–T7 RNA polymerase (T7 RNAP) fusion, coupling variant function to antitoxin expression, and growth based selection of surviving cells.
Xinyu Zhang +10 more
wiley +1 more source
Advanced Science, EarlyView.PTEN knockdown activates AKT phosphorylation, promoting Nrf2 nuclear translocation and STAT3 activation, which upregulates GPX4 and antioxidant enzymes HO‐1, SOD1, SOD2, and NQO1. These coordinated changes reduce lipid peroxidation and ROS, inhibit ferroptosis, and ultimately ameliorate cognitive impairment in APP/PS1 transgenic mice, highlighting a ...
Da‐Wei Wang +5 more
wiley +1 more source
Foraging strategies in grey seals (Halichoerus grypus) : foraging effort and prey selection [PDF]
, 2009 Swimming speeds and prey selection of temporally captive, wild grey seals (Halichoerus grypus) were investigated in relation to prey characteristics in an experimental set-up at the Sea Mammal Research Unit (St Andrews, UK).
Gallon, Susan Louise
core +2 more sources
Status of harbour seals (Phoca vitulina) in mainland Norway
NAMMCO Scientific Publications, 2010 Harbour seals were counted along the entire Norwegian coast at known moulting haulout sites in the period mid-August to early September 2003-2006. In 2003-2005, almost all known moulting areas from Finnmark to Vestfold counties were covered by aerial ...
Kjell Tormod Nilssen +5 more
doaj +1 more source
No serological evidence that harbour porpoises are additional hosts of influenza B viruses. [PDF]
PLoS ONE, 2014 Influenza A and B viruses circulate among humans causing epidemics almost annually. While various hosts for influenza A viruses exist, influenza B viruses have been detected only in humans and seals.
Rogier Bodewes +7 more
doaj +1 more source
Diet and heavy metal uptake by two top predator species in the Tees Estuary [PDF]
, 2006 The key aim of the thesis was to estimate metal uptake and its seasonal variation from the diet by two predators from the Tees Estuary, harbour seals, Phoca vitulina and cormorants, Phalacrocorax carbo.
Smurthwaite, Rebecca
core
F‐Type Pyocin Versus Phage λ Tail: Conserved Hub, Divergent Fibers
Advanced Science, EarlyView.Near‐atomic cryo‐EM structures of a Gram‐negative F‐type pyocin reveal a conserved tail tip architecture shared with bacteriophage λ together with a previously unrecognized side‐fiber attachment mode. These findings provide new insight into tailocin assembly and host recognition and establish a structural framework for engineering precision ...
Zhiwei Gu +5 more
wiley +1 more source
Programmable Topological Magnetic Textures in Above‐Room‐Temperature 2D Ferromagnet Fe3GaTe2
Advanced Science, EarlyView.This work demonstrates the programmable generation and deterministic modulation of magnetic skyrmion bags with high‐order topological numbers in the above‐room‐temperature 2D ferromagnet Fe3GaTe2 (FGaT) via current‐pulse control. Furthermore, highly efficient electrical manipulation and current‐driven parallel motion of these high‐order topological ...
Hanqing Shi +8 more
wiley +1 more source