In situ feeding rates and grazing impact of zooplankton in a South African temporarily open estuary

2003 ◽  
Vol 142 (2) ◽  
pp. 357-367 ◽  
Author(s):  
I. Kibirige ◽  
R. Perissinotto
Keyword(s):  
South African ◽  
Grazing Impact ◽  
Feeding Rates ◽  
In Situ Feeding

scholarly journals In situ feeding physiology and grazing impact of the appendicularian community in temperate waters

2003 ◽  
Vol 252 ◽  
pp. 125-141 ◽  
Author(s):  
Á López-Urrutia ◽  
X Irigoien ◽  
JL Acuña ◽  
R Harris
Keyword(s):  
Grazing Impact ◽  
In Situ Feeding

In situ feeding rates of plantonic copepods: A comparison of four methods

1985 ◽  
Vol 88 (1) ◽  
pp. 67-81 ◽  
Author(s):  
Thomas Kiørboe ◽  
Flemming Møhlenberg ◽  
Hans Ulrik riisgård
Keyword(s):  
Feeding Rates ◽  
In Situ Feeding

Effect of food composition and temperature on in situ feeding rates of ctenophore invader Mnemiopsis leidyi A. Agassiz

2014 ◽  
Vol 5 (1) ◽  
pp. 49-55 ◽  
Author(s):  
G. A. Finenko ◽  
G. I. Abolmasova ◽  
N. A. Datsyk ◽  
Z. A. Romanova ◽  
B. E. Anninskii
Keyword(s):  
Food Composition ◽  
Mnemiopsis Leidyi ◽  
Feeding Rates ◽  
Effect Of Food ◽  
In Situ Feeding

In Situ Feeding Rates of the Ctenophore Mnemiopsis mccradyi

Estuaries ◽  
1987 ◽  
Vol 10 (2) ◽  
pp. 87 ◽  
Author(s):  
R. J. Larson
Keyword(s):  
Feeding Rates ◽  
In Situ Feeding

scholarly journals In situ feeding as a new management tool to conserve orphaned Eurasian lynx (lynx lynx)

2021 ◽  
Author(s):  
Joe Premier ◽  
Martin Gahbauer ◽  
Franz Leibl ◽  
Marco Heurich
Keyword(s):  
Management Tool ◽  
Lynx Lynx ◽  
Eurasian Lynx ◽  
In Situ Feeding

Dehydration and decomposition of pyrophyllite at high pressures: electrical conductivity and X-ray diffraction studies to 5 GPa

1997 ◽  
Vol 34 (6) ◽  
pp. 875-882 ◽  
Author(s):  
Tara L. Hicks ◽  
Richard A. Secco
Keyword(s):  
Electrical Conductivity ◽  
South African ◽  
Pressure Dependence ◽  
High Pressures ◽  
Ionic Conduction ◽  
Temperature Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Temperature Dependence Of Conductivity

The dehydration and decomposition of South African pyrophyllite were studied in the pressure range 2.5–5.0 GPa and in the temperature (T) range 295–1473 K using both in situ electrical conductivity measurements and X-ray diffraction studies on the recovered samples. Activation energies for conduction (Qc) vary in the range 0.02–0.07 eV for T ≤ 500 K where the dominant conduction mode is electronic, and Qc is in the range 1.10–1.28 eV for T ≥ 500 K where ionic conduction dominates. Abrupt changes in the isobaric temperature dependence of conductivity mark the onset of dehydration and subsequent decomposition into kyanite plus quartz–coesite. At 2.5 GPa, South African pyrophyllite forms the dehydroxylate phase at 760 K with a pressure dependence of ~30 K/GPa and complete decomposition follows at 1080 K with a pressure dependence of ~41 K/GPa. The resulting pressure–temperature phase diagram is in very good agreement with many previous studies at 1 atm (101.325 kPa).

The Earliest South African Hominids

2021 ◽  
Vol 50 (1) ◽  
pp. 125-143
Author(s):  
Ronald J. Clarke ◽  
Travis Rayne Pickering ◽  
Jason L. Heaton ◽  
Kathleen Kuman
Keyword(s):  
East Africa ◽  
South African ◽  
The South ◽  
Taxonomic Assignment ◽  
First Time ◽  
Over Time

The earliest South African hominids (humans and their ancestral kin) belong to the genera Australopithecus, Paranthropus, and Homo, with the oldest being a ca. 3.67 million-year-old nearly complete skeleton of Australopithecus (StW 573) from Sterkfontein Caves. This skeleton has provided, for the first time in almost a century of research, the full anatomy of an Australopithecus individual with indisputably associated skull and postcranial bones that give complete limb lengths. The three genera are also found in East Africa, but scholars have disagreed on the taxonomic assignment for some fossils owing to historical preconceptions. Here we focus on the South African representatives to help clarify these debates. The uncovering of the StW 573 skeleton in situ revealed significant clues concerning events that had affected it over time and demonstrated that the associated stalagmite flowstones cannot provide direct dating of the fossil, as they are infillings of voids caused by postdepositional collapse.

New species, occurrence records and observations of predation by deep-sea Asteroidea (Echinodermata) from the North Atlantic by NOAA ship Okeanos Explorer

Zootaxa ◽  
2020 ◽  
Vol 4766 (2) ◽  
pp. 201-260 ◽  
Author(s):  
CHRISTOPHER L. MAH
Keyword(s):  
North Atlantic ◽  
Deep Sea ◽  
Substantial Contribution ◽  
The North ◽  
In Situ Observations ◽  
The North Atlantic ◽  
Feeding Observations ◽  
Occurrence Records ◽  
In Situ Feeding

Exploratory cruises by the NOAA Ship Okeanos Explorer have resulted in a substantial contribution in our understanding of deep-sea echinoderm biodiversity, biology, and ecology in the North Atlantic. This includes the description and in situ feeding observations of two, new corallivorous goniasterid species, Evoplosoma nizinskiae n. sp. and Sibogaster bathyheuretor n. sp. Significant in situ observations include a synchronous feeding event including multiple goniasterid asteroids and a cidaroid urchin on a large demosponge, providing new data for understanding echinoderm feeding behavior, including agonistic behavior, in deep-sea settings and new, in situ feeding observations for 28 deep-sea species including the myxasterid Pythonaster atlantidis, the korethrasterid Remaster palmatus and the poorly understood hippasterine goniasterids, Gilbertaster caribaea and Sthenaster emmae. 

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