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140 results for “Perch”
Minnesota Department of Natural Resources Yellow Perch and Bluegill Diet Study, Lower Pool 4 Mississippi River, 2018-2019
To assess potential dietary overlap and predation between bluegill and yellow perch, we examined stomach content of both species in three backwater contiguous lakes of Lower Pool 4 in the Mississippi River from May 2018 through January 2019. In this area, bluegill have been common for decades, but yellow perch only became abundant following an ecological shift to a clear-water, macrophyte dominated state that occurred from 2007 - 2007. We used daytime electrofishing to collect fish during open-water sampling (spring, summer, and fall) and ice angling during ice-covered sampling (winter). The dataset documents the diet content of one hundred and eighty-nine yellow perch and sixty-one bluegill. Stomach contents were extracted via gastric lavage in the spring, summer, and fall and via stomach removal in the winter. All prey items were categorized to lowest identifiable taxonomic level and quantified via volumetric displacement.
Micro elemental composition of Pike-perch (Sander lucioperca) population in Lipno Reservoir, Czechia
<p>This dataset contains the information on the micro elemental composition of Sagitta otoliths of Pike-Perch (<i>Sander lucioperca</i>) collected in Lipno Reservoir (Czechia). The dataset covers a wide range of micro elemental components (barium, calcium, copper, potassium, lithium, magnesium, manganese, sodium, rubidium, strontium and zinc) obtained from the otolith cores and rims of these fish specimens. The dataset includes readings from Pike-Perch directly collected in Lipno Reservoir, as well as from those reared in facilities and later introduced into the reservoir.</p>
Adaptive Nonlinear Control For Perching of a Bioinspired Ornithopter
<p>This dataset contains the flight data recorded by the onboard flight computer for perching experiments. During the experiments nonlinear guidance and control laws are used for trajectory tracking. The filght computer is designed around the NanoPi Neo Air. A custom made PCB attached to the NanoPi, and acts as a carrier for an STM32 microcontroller. The microcontroller regulates the servos via a PWM signal. At the same time, the flight computer connects with an Optitrack motion capture system. The Optitrack emits data at 120 Hz to a local network using a VRPN protocol. This data is recorded by the flight computer, used for state estimation, and the control is executed at 100 Hz.</p>
Passive Perching with Energy Storage for Winged Aerial Robots Dataset
<p>This dataset corresponds to the publication:</p> <p>"Passive Perching with Energy Storage for Winged Aerial Robots" W. Stewart, L. Guarino, Y. Piskarev, and D. Floreano. Advanced Intelligent Systems, <a href="http://doi.org/10.1002/aisy.202100150">http://doi.org/10.1002/aisy.202100150</a></p>
Sedimentation rate, concentration of macronutrients and flux for NE14, Toolik, Dimple, Perched during Summer 2009.
We measured the flux of bulk material and major macronutrients (carbon, nitrogen and phosphorus) from the water column to the benthos in four separate lakes during the summer of 2009. The lakes were chosen to investigate the impacts of disturbance on lake sedimentation. Two of the lakes, Dimple and Perched, were within catchments that were burned by the 2007 Anaktuvuk River wildfire. Two of the lakes, NE-14 and Perched, were receiving elevated sediment loads from thermokarst failures on their shorelines, and Toolik Lake was used as a reference lake. As such, the lakes were organized by disturbance regime: Dimple = fire only, Perched = fire + thermokarst, NE-14 = thermokarst only, and Toolik = undisturbed reference.
Lovebirds perch in building vents to cool down during hot times of year, a study of rosy-cheeked lovebirds (Agapornis roseicollis) in the Phoenix, Arizona, USA metropolitan area (2018-2019)
Extreme heat can place significant environmental and physiological pressures on animals. One means of tolerating extreme thermal conditions is to seek cool microclimates. Few empirical studies have documented use by wild animals of human-provided cool microsites as means of thermoregulating. Here we show that rosy-cheeked lovebirds in Phoenix, Arizona – the hottest city in North America – use relief air vents on the face of a building (which direct cool air outdoors when internal air-conditioning systems are on) as perching sites, and only during extremely hot times of day and year (> 45 C). Though this highlights a wasteful anthropogenic energy system (the product of an old building with outdated temperature-control technology), our results reveal how an introduced bird species (from Africa) can tolerate extreme thermal conditions in the novel environment.
Figure 3 in Biology of jungle perch, Kuhlia rupestris, identification of threats and knowledge gaps to improve local and global management
Figure 3. – Life cycle of K. rupestris and conservation issues. Within the cycle (blue area), the solid black line corresponds to the freshwater life phase. The lower and upper grey discontinuous lines correspond to the larval marine and estuarine phases of the species respectively. Outside the cycle, in orange, the known and suspected threats on the different life phases of the species (Gelineau et al., modified, 2015).
Figure 1 in Biology of jungle perch, Kuhlia rupestris, identification of threats and knowledge gaps to improve local and global management
Figure 1. – Distribution of K. rupestris in the Indo-Pacific zone (modified from Feutry, 2012a). In dotted line, the presumed natural range of the species and in solid lines, localities with a high likelihood of occurrence or known occurrence.
Thermal demagnetization data of Risica et al. (Deposit-derived block-and-ash flows: the hazard posed by perched temporary tephra accumulations on volcanoes; 2018 Fuego disaster, Guatemala)
<p>Thermal demagnetization data (repository data) of Risica et al. "Deposit-derived block-and-ash flows: the hazard posed by perched temporary tephra accumulations on volcanoes; 2018 Fuego disaster, Guatemala".</p>
How Ornithopters Can Perch Autonomously On A Branch
<p>Data used in the publication "How Ornithopters Can Perch Autonomously On A Branch", including both design and experimental data.</p>
Fig 2 in Study of haematology profile & histopathological changes in di-ammonium phosphate induced climbing perch, Anabas testudineus (Bloch.)
Fig 2: Showing the effect of Di-ammonium phosphate on Neutrophil, Monocytes, Basophil in Anabas testudineus (96 hrs) *P<0.05, *** P<0.001
Fig 7.A in Study of haematology profile & histopathological changes in di-ammonium phosphate induced climbing perch, Anabas testudineus (Bloch.)
Fig 7.A: Photomicrograph of the testes of Anabas testudineus control fish showing sperm (SP), spermatogonia (SG), spermitide (ST), secondary spermatocyte (SS), primary spermocytes (PS). H.&E., 200X
Fig 3 in Study of haematology profile & histopathological changes in di-ammonium phosphate induced climbing perch, Anabas testudineus (Bloch.)
Fig 3: Showing the effect of Di-ammonium phosphate on Lymphocytes, Eosinophil, PCV, in Anabas testudineus (96 hrs) ** P<0.01
Fig 4.B in Study of haematology profile & histopathological changes in di-ammonium phosphate induced climbing perch, Anabas testudineus (Bloch.)
Fig 4.B: Photomicrograph of the liver of Anabas testudineus treated with DAP- 0.092 g/L for 20 days showing hemorrhagic liver tissue, blood congestion and necrotic cells. H. & E., 100X
Fig 5.B in Study of haematology profile & histopathological changes in di-ammonium phosphate induced climbing perch, Anabas testudineus (Bloch.)
Fig 5.B: Photomicrograph of kidney of A. testudineus treated with DAP-0.092 g/l for 20 days showing degeneration of renal tubular epithelium, vacuolation and necrosis of renal tubules along with infiltration and necrosis of melanomacrophage center (arrow). H.&E., 20X
Fig 1 in Study of haematology profile & histopathological changes in di-ammonium phosphate induced climbing perch, Anabas testudineus (Bloch.)
Fig 1: Showing the effect of Di-ammonium phosphate on Hb, RBC, WBC in Anabas testudineus (96 hrs) ***P<0.001
Fig 8.B in Study of haematology profile & histopathological changes in di-ammonium phosphate induced climbing perch, Anabas testudineus (Bloch.)
Fig 8.B: Photomicrograph of the ovary of Anabas testudineus treated with DAP- 0.092 g/L for 20 days showing (NU) Nucleolus condensed, (CT) Connective tissue degenerate (AF) Atretic follicle & (FW) Follicular wall disrupted. H.&E., 200X.
Fig 8.A in Study of haematology profile & histopathological changes in di-ammonium phosphate induced climbing perch, Anabas testudineus (Bloch.)
Fig 8.A: Photomicrograph of the ovary of Anabas testudineus control fish showing (OW) Ovarian wall, (FE) Follicular epithelium, (N) Nucleus, (NU) Nucleolus, (OC) Oocyte. H.&E., 200X
Fig 5.A in Study of haematology profile & histopathological changes in di-ammonium phosphate induced climbing perch, Anabas testudineus (Bloch.)
Fig 5.A: Photomicrograph of kidney of Anabas testudineus from control group showing normal. H.&E., 200X
Fig 7.B in Study of haematology profile & histopathological changes in di-ammonium phosphate induced climbing perch, Anabas testudineus (Bloch.)
Fig 7.B: Photomicrograph of the testes of Anabas testudineus treated with DAP- 0.092 g/L for 20 days showing sperm (SP), spermatogonia condensation (SG), spermitide (ST), secondary spermatocyte vacuolation (SS). H.&E., 200x
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OpenNeuro
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