Results 131 to 140 of about 28,607 (286)

The relationship between the feather tuft of the uropygial gland and terrestrial/aquatic birds [PDF]

, 2013
The bird´s uropygial gland has a papilla in its caudal end and it can also show a feather tuft. These feathers may have a raquis or not. The purpose of our study was to compare the number, dimensions and types of the tuft´s feathers in aquatic and ...
Chiale, Maria Cecilia, Montalti, Diego
core  

CardiacDP: An R package for rapid automated cardiac data processing, integrating autocorrelation, a genetic algorithm, and a tracking index

Limnology and Oceanography: Methods, EarlyView.
Abstract Heart rate is a popular proxy of physiological responses, but the highly complex and variable cardiac data obtained from organisms such as marine invertebrates pose a major challenge to efficient and accurate data processing. To address this, we developed a novel, integrative algorithm for rapid and automated cardiac data processing.
Sarah L. Y. Lau, Adrian T. C. Wong, Yi‐Fei Gu, Tin Yan Hui   +3 more
wiley   +1 more source

Management and utilization of water hyacinth (Eichhornia crassipes) for improved aquatic resources [PDF]

, 2010
Natural aquatic plants population can be healthy for any aquatic ecosystems as they serve as fish feed, play an important role in nutrient cycling, purify the water, control unwanted algal growth and support fauna including birds.
Sotolu, A.O.
core  

Stable Carbon and Nitrogen Isotope Analysis Explores Diverse Domestic Goose Management Practices in Medieval and Postmedieval Russia

International Journal of Osteoarchaeology, EarlyView.
ABSTRACT Studying goose domestication through archaeological finds has been challenging due to the similar skeletal morphology of the European domestic goose and its wild progenitor, the greylag goose (Anser anser). We analyzed stable carbon (δ13C) and nitrogen (δ15N) isotopes from bone collagen of subfossil domestic and potentially domestic geese to ...
Johanna Honka, Clément Massé, Arthur O. Askeyev, Igor V. Askeyev, Oleg V. Askeyev, Jouni Aspi, Dilyara N. Shaymuratova, Laura Kvist   +7 more
wiley   +1 more source

Linking regional and global functional trait data: insights from mammal communities in a fragmented Atlantic Forest landscape

Oikos, EarlyView.
Accurate functional trait data are essential for understanding ecosystem services and processes in fragmented landscapes. We evaluated whether the global EltonTraits 1.0 database adequately represents the functional structure of mammal communities in forest fragments and restoration sites in a highly fragmented Atlantic Forest landscape.
Maria F. R. Godoi, Fábio Z. Farneda, Alan D. Pereira, Marcos Akira‐ Umeno, Fernanda C. Marques, Marcos Robalinho Lima   +5 more
wiley   +1 more source

Taxonomic review of the aquatic birds` helminthes (Cestoda; Nematoda) in the delta of the Volga

, 2015
The taxonomic review of cestodes and nematodes of the aquatic birds in the delta of the Volga has been given.
T. G. Kashina, V. V. Fedorovich, N. N. Semyonova, V. M. Ivanov, A. P. Kalmykov   +4 more
core   +1 more source

Coexistence, crossover and extirpation in coalescent communities and ecotones

Oikos, EarlyView.
When two ecological communities come into contact, the strength of their mixing determines whether species coexist, extirpate, or extend their ranges. We present analytical formulas and simulations describing these transitions. Specifically, we derive abundance shifts upon community coalescence, identify the critical mixing strength leading to first ...
Martin Heidelman, Dervis Can Vural
wiley   +1 more source

The niche variation hypothesis predicts hunting returns across human cultures

Oikos, EarlyView.
The niche variation hypothesis (NVH) proposes that a broader population niche arises from greater individual specialization. Despite decades of empirical testing, research remains constrained to non‐human foragers, and the generality of NVH may extend beyond wildlife. The analysis of > 8000 hunting records from 12 human societies across four continents
Raul Costa‐Pereira
wiley   +1 more source

Differences in endozoochorous dispersal between aquatic plant species, with reference to plant population persistence in rivers

, 2004
1. In river ecosystems, populations are continuously subjected to unidirectional downstream currents resulting in a downstream movement of populations.
Pollux, B.A.J., L. SANTAMARIA, Santamaria, L., Pollux, B.J.A., Ouborg, N.J., B. J. A. POLLUX, N. J. OUBORG   +6 more
core   +1 more source

Urban‐driven homogenization of aquatic subsidy size structure cascades to riparian predator communities

Oikos, EarlyView.
The export of emergent aquatic insects is a critical energy subsidy for terrestrial food webs. While urbanization is known to alter stream communities, its effects on the size structure of these insect subsidies and the subsequent consequences for riparian predators remain poorly understood.
Charles Gagnon, Louis‐Philippe Beauchamp, Eric Harvey   +2 more
wiley   +1 more source