Results 31 to 40 of about 7,920 (201)

Changes in the structure and functionof the North Sea fish foodweb, 1973-2000, and the impacts of fishing and climate [PDF]

, 2005
North Sea environmental and biological data were analysed to examine 30-year changes in production and consumption in the fish food web. The analysis revealed that the demand for secondary production placed on the ecosystem by fish declined from ...
Beare, Beaugrand, Broekhuizen, Bryant, Christensen, Clark, Clark, Collie, Daan, Daan, Dugdale, Duineveld, Edwards, Fogarty, Fox, Frid, Garrison, Greenstreet, Greenstreet, Hay, Heip, Hirtzler, Huntley, Jennings, Jobling, Jonas, Jones, Jones, McKay, McKay, Michael R. Heath, Murawski, Pauly, Pauly, Pauly, Pielou, Pope, Pyper, Reid, Rice, Richardson, Richardson, Richardson, Runge, Sparholt, Steele, Tasker, Zwanenburg   +47 more
core   +1 more source

New specimens of Yanornis indicate a piscivorous diet and modern alimentary canal.

PLoS ONE, 2014
A crop adapted for an herbivorous diet of seeds has previously been documented in the Early Cretaceous birds Sapeornis and Hongshanornis. Here we report on several specimens of Yanornis that preserve a crop containing fish.
Xiaoting Zheng, Jingmai K O'Connor, Fritz Huchzermeyer, Xiaoli Wang, Yan Wang, Xiaomei Zhang, Zhonghe Zhou   +6 more
doaj   +1 more source

Do birds of a feather flock together? Comparing habitat preferences of piscivorous waterbirds in a lowland river catchment [PDF]

, 2014
Waterbirds can move into and exploit new areas of suitable habitat outside of their native range. One such example is the little egret (Egretta garzetta), a piscivorous bird which has colonised southern Britain within the last 30 years.
A Dimalexis, A Jensen, A Royan, AF Zuur, AJ Musgrove, AS Cook, AS Gee, AT Hitch, C Tourenq, C Voisin, D Denac, D Liley, E Feunteun, F Chavez-Ramirez, FA Sorte La, GJA Kennedy, GR Walther, GVN Powell, H Cook, H Hafner, IC Chen, J Bettey, J Burger, J Hannaford, J Jacobs, JA Kushlan, JEG Masters, K Lombardini, KA Wood, KA Wood, KA Wood, Kevin A. Wood, KM Carney, L Lock, M Fasola, MA Davis, P Combridge, RHK Mann, Richard A. Stillman, S Kazantzidis, SJ Lane, SJ Manchester, TA Crowl, VS Ivlev, WJ Arendt   +44 more
core   +1 more source

Utilizing Environmental DNA Metabarcoding to Assess Fish‐Based Food Resources in Key Foraging Areas of the Black Stork [PDF]

Ecol Evol
This study employed environmental DNA (eDNA) to assess fish‐based food resources in key foraging areas of the Black Stork (Ciconia nigra)—Zhanghe Canyon and Qixi River National Wetland Parks in Henan, China. Results show that the main prey in these habitats are fish from the orders Siluriformes, Cypriniformes, and Perciformes, with no significant ...
Yang X, Liu B, Wu J, Yuan X, Li D, Liu S.   +5 more
europepmc   +2 more sources

New crania from Seymour Island (Antarctica) shed light on anatomy of Eocene penguins [PDF]

, 2013
Antarctic skulls attributable to fossil penguins are rare. Three new penguin crania from Antarctica are here described providing an insight into their feeding function.
Acosta Hospitaleche, Carolina Ileana Alicia
core   +2 more sources

Using life-history traits to explain bird population responses to changing weather variability [PDF]

, 2011
Bird population dynamics are expected to change in response to increased weather variability, an expression of climate change. The extent to which species are sensitive to effects of weather on survival and reproduction depends on their life-history ...
Braak, C.J.F., ter, Cormont, A., Foppen, R.P.B., Turnhout, C.A.M., van, Vos, C.C.   +4 more
core   +2 more sources

Piscivorous Bird Use of Aquaculture and Natural Water Bodies in Mississippi

The Journal of Wildlife Management, 2020
ABSTRACTDouble‐crested cormorants (Phalacrocorax auritus) and great egrets (Ardea alba) have an extensive history of human‐wildlife conflict with the aquaculture industry of western Mississippi, USA, due to their depredation of cultured catfish (Ictalurus spp.).
Paul C. Burr, Jimmy L. Avery, Garrett M. Street, Bronson K. Strickland, Brian S. Dorr   +4 more
openaire   +2 more sources

Influence of allochtonous nutrients delivered by colonial seabirds on soil collembolan communities on Spitsbergen [PDF]

, 2012
Despite a widespread recognition of the role of seabird colonies in the fertilization of nutrient-poor polar terrestrial ecosystems, qualitative and quantitative data documenting any consequential influence on soil invertebrate communities are still ...
Convey, Peter, Iliszko, Lech, Olejniczak, Izabela, Stempniewicz, Lech, Zmudczyńska, Katarzyna, Zwolicki, Adrian   +5 more
core   +2 more sources

The microbiome of African penguins (Spheniscus demersus) under managed care resembles that of wild marine mammals and birds

Scientific Reports, 2023
Animals under managed care in zoos and aquariums are ideal surrogate study subjects for endangered species that are difficult to obtain in the wild. We compared the fecal and oral microbiomes of healthy, managed African penguins (Spheniscus demersus) to ...
Ana G. Clavere Graciette, Lisa A. Hoopes, Tonya Clauss, Frank J. Stewart, Zoe A. Pratte   +4 more
doaj   +1 more source

Piscivorous Bird Deterrent Device Based on a Direct Digital Synthesis of Acoustic Signals

Elektronika ir Elektrotechnika, 2021
This paper addresses the development of an acoustic deterrent device for the protection of fishponds and other objects against the unwanted presence of birds. The objective of the paper is not only providing of a deep analysis of available technologies for waveform synthesis and generation, but also building a theoretical base for the design and ...
Arturs Aboltins, Dmitrijs Pikulins, Juris Grizans, Sergejs Tjukovs   +3 more
openaire   +3 more sources