Results 21 to 30 of about 225 (143)
Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 31, Issue 8, Page 2029-2040, August 2021., 2021 Abstract Artificial barriers on lowland rivers impede the spawning migrations of anadromous fishes, preventing access to historical spawning areas. In the cryptic European shads Alosa alosa and Alosa fallax (‘shad’ hereafter), this has resulted in population declines across their range. Conservation programmes aim to facilitate the passage of migrators
Caterina Maria Antognazza +9 more
wiley +1 more source
Journal of Morphology, Volume 282, Issue 6, Page 874-886, June 2021., 2021 Micro‐CT of the scleral ring of a Snares crested penguin (Eudyptes robustus) surrounding a gentoo penguin (Pygoscelis papua) skull. In penguins the scleral ring contains 10–17 overlapping ossicles, maintaining the shape of the eye and providing an attachment for the rectus muscles. Its position within the skull suggests a role in globe protection also.
Peter W. Hadden +3 more
wiley +1 more source
Cormorant predation effects on fish populations: A global meta‐analysis
Fish and Fisheries, Volume 22, Issue 3, Page 605-622, May 2021., 2021 Abstract This paper provides the results from the first meta‐analysis to examine the impact of cormorant (Phalacrocoracidae) predation on fish. It is based on a systematic search of literature, covering studies using significance‐based hypotheses tests on the relation between fish parameters and cormorant abundance.
Maria K. Ovegård +3 more
wiley +1 more source
Seabird guano fertilizes Baltic Sea littoral food webs. [PDF]
PLoS ONE, 2013 Nutrient enrichment in coastal marine systems can have profound impacts on trophic networks. In the Baltic Sea, the population of Great Cormorant (Phalacrocorax carbo sinensis) has increased nearly exponentially since the mid-1990 s, and colonies of ...
Karine Gagnon +4 more
doaj +1 more source
Corneal power and underwater accommodation in great cormorants(Phalacrocorax carbo sinensis) [PDF]
Journal of Experimental Biology, 2003 SUMMARY In great cormorants (Phalacrocorax carbo sinensis), corneal refractive powers, determined by photokeratometry, ranged between 52.1 diopters (52.1 D) and 63.2 D. Photorefractive reflexes, determined by infrared video photorefraction, indicated that in voluntary dives the cormorants accommodate within 40-80 ms of submergence and ...
Gadi, Katzir, Howard C, Howland
openaire +2 more sources
Cypriniform fish in running waters reduce hyporheic oxygen depletion in a eutrophic river
Freshwater Biology, Volume 65, Issue 9, Page 1518-1528, September 2020., 2020 Abstract The hyporheic zone is an important habitat for benthic invertebrates and early‐developmental stages of gravel spawning fish. However, the eutrophication of running waters and, in turn, the excessive periphyton biomass leads to its biological clogging.
Dirk Hübner +4 more
wiley +1 more source
Scientia Marina, 2018 The Mediterranean shag (Phalacrocorax aristotelis desmarestii) and the great cormorant (P. carbo sinensis) are syntopic birds in an area encompassing Grosa Island and the Mar Menor coastal lagoon (SE Spain, western Mediterranean) during the breeding ...
Felipe Aguado-Giménez +4 more
doaj +1 more source
Testing auditory sensitivity in the great cormorant (Phalacrocorax carbo sinensis): Psychophysics vs. Auditory brainstem response [PDF]
Proceedings of Meetings on Acoustics, 2016 Psychoacoustic and electrophysiological methods were used to measure the in-air hearing sensitivity of the great cormorant (Phalacrocorax carbo sinensis). One individual was used to determine the behavioral thresholds, which was then compared to previously collected data on the auditory brainstem response (ABR) thresholds from 11 individuals.
Maxwell, Alyssa +5 more
openaire +3 more sources
Vocal behaviour of the Great Cormorant Phalacrocorax carbo sinensis during the breeding season [PDF]
Bird Study, 2021 Capsule: Great Cormorants Phalacrocorax carbo sinensis use vocal communication during the breeding season, with males being particularly vocal earlier in the breeding cycle and showing individual variation in some calls, which could be used for individual recognition.
Saara Mäkelin +4 more
openaire +3 more sources
APPLICATION OF THE GREAT CORMORANT'S (Phalacrocorax carbo sinensis) DAILY MEAL IN THE STIMATION OF DAMAGES AT FISHPONDS [PDF]
Croatian Journal of Fisheries, 2004 Daily meal of the Great Cormorant (Phalacrocorax carbo sinensis), joined with the number of birds and composition of fish in the meal, has high importance in total calculation of damage-costs on fish stock.
Anđelko Opačak +3 more
doaj