Results 41 to 50 of about 49,315 (282)

An evolutionarily stable joining policy for group foragers [PDF]

open access: yes, 2005
For foragers that exploit patchily distributed resources that are challenging to locate, detecting discoveries made by others with a view to joining them and sharing the patch may often be an attractive tactic, and such behavior has been observed across ...
Broom, M., Fraser, C., Ruxton, G. D.
core   +3 more sources

Feeding and foraging ecology of Trindade petrels Pterodroma arminjoniana during the breeding period in the South Atlantic Ocean [PDF]

open access: yes, 2017
Seabirds breeding in tropical environments experience high energetic demands, when foraging in an oligotrophic environment. The globally threatened Trindade petrel Pterodroma arminjoniana has its largest colony in Trindade Island (20°30′S–29°19′W) inside
Bugoni, Leandro   +4 more
core   +1 more source

Assortative Mating By Diet In A Phenotypically Unimodal But Ecologically Variable Population Of Stickleback [PDF]

open access: yes, 2008
Speciation with gene flow may be driven by a combination of positive assortative mating and disruptive selection, particularly if selection and assortative mating act on the same trait, eliminating recombination between ecotype and mating type ...
Bolnick, Daniel I., Snowberg, Lisa K.
core   +1 more source

Ecosystem overfishing in the ocean. [PDF]

open access: yesPLoS ONE, 2008
Fisheries catches represent a net export of mass and energy that can no longer be used by trophic levels higher than those fished. Thus, exploitation implies a depletion of secondary production of higher trophic levels (here the production of mass and ...
Marta Coll   +4 more
doaj   +1 more source

Changing numbers of three gull species in the British Isles [PDF]

open access: yes, 2016
Between-population variation of changes in numbers can provide insights into factors influencing variation in demography and how population size or density is regulated.
Nager, Ruedi G., O'Hanlon, Nina J.
core   +1 more source

Food webs in forest and pasture streams in the Waikato region, New Zealand: A study based on analyses of stable isotopes of carbon and nitrogen, and fish gut contents. [PDF]

open access: yes, 1997
Stable isotopes of carbon (C) and nitrogen (N) were studied in 11 stream communities in the Waikato region of New Zealand. From comparisons of mean d13C and d15N values, food webs in the shaded, forest streams were clearly based on allochthonous material
Biggs B., Lester P. J., Main M. L.
core   +2 more sources

The centrosomal deubiquitylase USP21 regulates Gli1 transcriptional activity and stability [PDF]

open access: yes, 2016
USP21 is a centrosome-associated deubiquitylase (DUB) that has been implicated in the formation of primary cilia - crucial organelles for the regulation of the Hedgehog (Hh) signaling pathway in vertebrates. Here, we identify KCTD6 - a cullin-3 E3-ligase
Bertsoulaki, Erithelgi   +6 more
core   +1 more source

Outcomes of Live Virus Vaccination in Patients With Vascular Anomalies Being Treated With Sirolimus

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Live vaccination in patients with vascular anomalies (VA) receiving sirolimus remains controversial due to immunosuppressive effects and theoretical risks. Procedure This single‐center retrospective study included patients with VA less than 4 years old at the start of sirolimus therapy who were incompletely vaccinated.
Svatava Merkle   +5 more
wiley   +1 more source

Gut evacuation rate as a tool for revealing feeding patterns in the invasive round goby (Neogobius melanostomus) under different feeding modes, food types and temperatures [PDF]

open access: yesAquatic Invasions
The round goby (Neogobius melanostomus) is a well-known invasive fish. Knowledge of its feeding habits and means of food processing is key in understanding its impact on aquatic food webs.
Natalia Z. Szydłowska   +6 more
doaj   +3 more sources

Food for all: Small fish with big influence [PDF]

open access: yes, 2016
WWF-Canada recommendations to protect forage fish - based on 2012 report by the Lenfest Forage Fish Task Force, a group of 13 prominent fisheries scientists from around the ...

core  

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