Results 31 to 40 of about 15,856 (229)

Modeling patterns of zooplankton diel vertical migration [PDF]

Journal of Plankton Research, 1998
Realized predation pressure, defined as the product of predation pressure and light intensity, expresses the mortality pressure due to visual predation. The part of realized predation pressure which is sensed by organisms is here considered to be related to food level and temperature.
Bo-Ping Han, Milan Straškraba
openaire   +1 more source

Vertical distribution of Baltic sprat larvae: changes in patterns of diel migration? [PDF]

, 2007
Ontogenetic and diurnal vertical migration patterns of Baltic sprat larvae were investigated for the periods 1989–1990 and 1998–2002. Comparison of the results led to the hypothesis that the diel vertical migration behaviour of sprat larvae >10 mm has ...
Schmidt, Jörn, Schnack, Dietrich, Voss, Rüdiger   +2 more
core   +1 more source

Predicting diel vertical migration of zooplankton [PDF]

Limnology and Oceanography, 1990
Amplitude of diel vertical migration is predicted by water clarity measured by Secchi depth. The model assumes that vertical migration serves to minimize mortality from visually feeding fish and to maximize grazing rate within this predation context. Three of the 24 observations of diel vertical migration are outliers which are either ultraoligotrophic,
openaire   +1 more source

Seasonal depth and temperature use, and diel movements of lake trout (Salvelinus namaycush) in a subarctic lake

Arctic Science, 2019
We conducted a multi-year acoustic telemetry study of lake trout (Salvelinus namaycush (Walbaum, 1792)) in a small subarctic lake to investigate depth and temperature occupancy, and vertical activity across seasons (summer, fall, and winter), diel ...
Colin P. Gallagher, Matthew M. Guzzo, Terry A. Dick   +2 more
doaj   +1 more source

Interpreting vertical movement behavior with holistic examination of depth distribution: a novel method reveals cryptic diel activity patterns of Chinook salmon in the Salish Sea

Animal Biotelemetry, 2017
Aquatic organisms exhibit a variety of diel changes in vertical movement that are investigable through the use of biotelemetry. While certain species do not change their movements between day and night, others exhibit diel vertical migration (DVM) or a ...
M. C. Arostegui, T. E. Essington, T. P. Quinn   +2 more
doaj   +1 more source

Factors affecting methylmercury biomagnification by a widespread aquatic invertebrate predator, the phantom midge larvae Chaoborus [PDF]

, 2012
MeHg biomagnification by the phantom midge Chaoborus in relation to MeHg concentrations in their prey and its migratory behavior was investigated in two Canadian Precambrian Shield lakes.
Aldamman, Lama, Amyot, Marc, Bourdiol, Floriane, Le Jeune, Anne-Hélène, Perron, Tania, Pinel-Alloul, Bernadette   +5 more
core   +2 more sources

Mesoscale subduction at the Almeria-Oran front. Part 2: biophysical interactions. [PDF]

, 2001
This paper presents a detailed diagnostic analysis of hydrographic and current meter data from three, rapidly repeated, fine-scale surveys of the Almeria–Oran front.
Allen, Allen, Allen, Arnone, Arnone, Ashjian, B Rabe, Bainbridge, Baussant, Beaulieu, Bianchi, Boucher, Boucher, Cheney, Claustre, Crisp, Crisp, Crowder, DePalma, Dewey, Fiala, Flagg, Folkard, Franks, Franks, Gascard, Gorsky, Govoni, Griffiths, H.S.J Roe, Haury, Heburn, Herman, Herring, Heywood, Hobson, Hood, Huntley, J.T Allen, Johnson, L'Helguen, L'Helguen, Le Fèvre, Lillibridge, Lohrenz, Longhurst, M.C Hartman, Magnuson, McClain, Murav'yev, N Crisp, Nash, Okubo, Olson, Olson, Olson, Ortner, Ortner, Owen, Perkins, Perkins, Plueddemann, Pollard, Pollard, Prieur, Prieur, Rabe, Roe, S Fielding, Seguin, Sournia, Sournia, Strass, Thibault, Tintore, Videau, Viúdez, Williams, Wishner, Yoder, Zakardjian   +80 more
core   +1 more source

Upward phosphorus transport by Daphnia diel vertical migration [PDF]

Limnology and Oceanography, 2009
In many lakes, zooplankton show a distinct diel vertical migration (DVM) behavior, especially during periods of stratification. Excretion products of these zooplankton could potentially cause an upward nutrient transport and consequent nutrient enrichment for phytoplankton in the epilimnion.
Haupt, F., Stockenreiter, M., Reichwaldt, E., Baumgartner, M., Lampert, W., Boersma, M., Stibor, H.   +6 more
openaire   +2 more sources

Spatiotemporal Variation in Marine Mammal Antipredator Behaviors Resulting From a Predation Pinch Point. [PDF]

Ecol Evol
Using 17 years of biologging data from 353 adult female northern elephant seals, we explored how seals modified their use of time and space when moving through nearshore areas where predation risk is high. We found that seals tended to depart at night, arrive during the day, and perform benthic dives along the continental shelf.
Hale CM, Jouma'a J, Brown A, Robinson PW, Holser RR, Costa DP, Beltran RS.   +6 more
europepmc   +2 more sources

Oxygen minimum zone: An important oceanographic habitat for deep-diving northern elephant seals, Mirounga angustirostris. [PDF]

, 2017
Little is known about the foraging behavior of top predators in the deep mesopelagic ocean. Elephant seals dive to the deep biota-poor oxygen minimum zone (OMZ) (>800 m depth) despite high diving costs in terms of energy and time, but how they ...
Adachi, Taiki, Costa, Daniel P, Mitani, Yoko, Naito, Yasuhiko, Peterson, Sarah H, Robinson, Patrick W, Takahashi, Akinori   +6 more
core   +2 more sources