Results 51 to 60 of about 4,160,848 (334)

Notes on Norwegian marine Amphipoda. 8. Amphipods found in association with sponges and tunicates

open access: yesFauna Norvegica, 1984
Nineteen amphipod species in seven different families have been recorded living on or in Porifera and/or Tunicata in Norwegian waters. Of these Laothoes meinerti, Cheirimedon latimanus and two species of Paramphithoidae are confined to sponges, while ...
Wim Vader
doaj   +1 more source

Interspecific morphological variation in Juglandoideae resting bud organisation-a winter's tale?

open access: yesAnnals of Botany, 2022
BACKGROUND AND AIMS Dormant resting buds are frequently regarded as static units, with protective cataphylls on the outside and embryonic foliage leaves on the inside.
Kristel M. Schoonderwoerd, W. Friedman
semanticscholar   +1 more source

Variable interspecific competition under megadrought conditions: rodent population dynamics in semiarid Chile

open access: yesOikos, 2023
Deciphering how climatic variability modulates the interspecific interactions in natural systems is one of the most interesting and least studied ecological processes. Rodent outbreaks or irruptions in semiarid Chile are associated with rainfall pulses driven by the El Niño Southern Oscillation (ENSO). During the last decade, north‐
Mauricio Lima   +3 more
openaire   +2 more sources

A natural hybrid between rudd Scardinius erythrophthalmus and bream Abramis brama from Lake Akersvann, SE Norway

open access: yesFauna Norvegica, 1985
An examination of 83 cyprinid specimens collected in Lake Akersvann, SE Norway in Sept. 1984 and in June and Sept. 1985 showed these to be natural hybrids between Scardinius erythrophthalmus and Abramis brama.
Per Pethon
doaj   +1 more source

S.E.M. observations on plerocercus larvae of Floriceps saccatus Cuvier, 1817 and Molicola horridus (Goodsir, 1841) (Cestoda; Trypanorhyncha) from sunfish (Mola mola)

open access: yesFauna Norvegica, 1987
A topographic description of the plerocercus larva of Floriceps saccatus is given. The larva was found to be covered by palmate or paw-like microtriches, not only on the adherent surface of the bothridia as earlier described from adult trypanorhynch ...
Karin Andersen
doaj   +1 more source

EFFECTS OF REFUGES AND DENSITY DEPENDENT DISPERSAL ON INTERSPECIFIC COMPETITION DYNAMICS

open access: yesInternational Journal of Bifurcation and Chaos, 2012
We present a classical interspecific competition model. Individuals compete for a resource on a common patch and can go to a refuge. It is assumed that if species would remain on the competition patch, species 1 survives and species 2 would go extinct. Therefore, species 1 is Locally Superior Competitor (LSC) and species 2 Locally Inferior Competitor (
Nguyen-Ngoc, D.   +2 more
openaire   +3 more sources

Intensive whitefish exploitation: effects on population structure of whitefish Coregonus lavaretus L. and brown trout Salmo trutta L. in a mountain reservoir

open access: yesFauna Norvegica, 1989
During the years 1980 - 1986, an intensive whitefish, Coregonus lavaretus, exploitation programme was carried out in the mountain reservoir Goppollen, SE Norway, in an attempt to improve whitefish quality and to reduce interspecific competition between ...
Svein Jakob Saltveit, Åge Brabrand
doaj   +1 more source

Quantifying and Disentangling the Competition Effect of a Weed Community in a Long-Term Biennial Cereal-Legume Rotation

open access: yesAgronomy, 2023
Weeds are a permanent constraint on crop productivity in agriculture. Due to the importance of the effect of weeds on the crop, there has been great interest in establishing the competitive ability of each species to optimize its control.
Jose L. Gonzalez-Andujar   +2 more
doaj   +1 more source

Bird predation on hatchery reared Atlantic salmon smolts, Salmo salar L., released in the River Eira, Norway

open access: yesFauna Norvegica, 1987
Carlin-tagged Atlantic salmon smolts have been released in the River Eira in western Norway during the period 1961 - 1980. Just after release birds were observed as smolt predators.
Ole Reitan   +2 more
doaj   +1 more source

Conventional niche overlap measurements are not effective for assessing interspecific competition

open access: yesFrontiers in Ecology and Evolution, 2023
Interspecific competition is notoriously difficult to detect and quantify, especially in species that are wide-ranging or otherwise difficult to track in the wild.
Dennis L. Murray   +3 more
doaj   +1 more source

Home - About - Disclaimer - Privacy