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91 results for “Cottus”
Factorial experiment to test effects of food availability and temperature on slimy sculpin (Cottus cognatus) at Toolik Field Station, 2018
We used a fully factorial experiment to test effects of food availability and temperature (7.6, 12.7 and 17.4 degrees C; 50 days) on growth, consumption, respiration, and excretion of slimy sculpin (Cottus cognatus).
Habitat use, consumption, and growth by slimy sculpin (Cottus cognatus) held under different levels of temperature at Toolik Field Station 2019
We tested effects of temperature (12 and 19.3 degrees C; 27 days) on habitat use, consumption, and growth of slimy sculpin (Cottus cognatus). To measure temperature selection by sculpin, we connected two 5.7 L tanks with a PVC pipe that was passable by sculpin (n = 12 tanks). We heated one side of the tank to 12 °C and the other to 19.3 °C using aquarium heaters.
Fig. 4 in A new species of the genus Cottus (Scorpaeniformes, Cottidae) from the Baltic Sea Basin and its phylogenetic placement
Fig. 4. The result of statistical analysis of morphometric characters of type and non-type specimens of Cottus cyclophthalmus sp. nov. from rivers Krasnaya, Neris, Šerkšnė, Siesartis, and Žeimena (method of principal components was used). The numbers correspond to the places where the sculpins were caught, as indicated on the map (Fig. 1).
Fig. 2 in A new species of the genus Cottus (Scorpaeniformes, Cottidae) from the Baltic Sea Basin and its phylogenetic placement
Fig. 2. Cottus cyclophthalmus sp. nov., holotype, ♂ (ZIN 56687), SL 83.3 mm, TL 99.0 mm, Krasnaya River, near Tokarevka village, 54º24'59.4" N 22º23'50.4" E. 3D scan images. a. Lateral view. b. Dorsal view. c. Ventral view.
Fig. 1 in A new species of the genus Cottus (Scorpaeniformes, Cottidae) from the Baltic Sea Basin and its phylogenetic placement
Fig. 1. The map of sampling sites showing the distribution of Cottus cyclophtalmus sp. nov. The numbers indicate sampling sites in various rivers: 1. Krasnaya River. 2. Neris River. 3. Žeimena River. 4. Siesartis River. 5. Šerkšnė River. The star marks the type locality of the new species; the circles mark sampling sites of non-type specimens; the triangle marks the locality where specimen of Cottus microstomus sp. nov. was caught.
Fig. 3 in A new species of the genus Cottus (Scorpaeniformes, Cottidae) from the Baltic Sea Basin and its phylogenetic placement
Fig. 3. The zoological picture of the holotype of Cottus cyclophthalmus sp. nov. (ZIN 56687), SL 83.3 mm, lateral view.
Fig. 5 in A new species of the genus Cottus (Scorpaeniformes, Cottidae) from the Baltic Sea Basin and its phylogenetic placement
Fig. 5. The result of the DFA carried out on morphometric characters to discriminateCottus cyclophthalmus sp. nov. (green), Cottus gobio Linnaeus, 1758 (blue), and Cottus koshewnikowi Gratzianov, 1907 (red).
Fig. 1 in Alpine bullhead (Cottus poecilopus Heckel): a potential refuge for Gyrodactylus salaris Malmberg, 1957 (Monogenea)
Fig. 1. Effect of temperature on infection with Gyrodactylus salaris Malmberg, 1957 on alpine bullhead, Cottus poecilopus Heckel, from the River Nitelva, southeastern Norway. A – mean infection intensity and duration; B – the relationship between initial infection load (Day 0) and infection duration. Open circles = low temperature (6.5 ± 0.5 °C; n = 18); closed circles = high temperature (11.5 ± 0.3 °C; n = 9); vertical bars and values = range (minimum, maximum) and prevalence (%).
Age, growth and reproduction of mottled sculpin (cottus bairdi) in the Coweeta creek drainage from 1993 to 1998
We quantified: (1) growth rate, (2) length-mass relationships, (3) size- and age-specific fecundity, (4) egg sizefrequencies, and (5) size- and age-specific egg diameter relationships for reproductively active female C. bairdi from one of the southern-most extant populations of this species (Coweeta Creek drainage, North Carolina). Gravid females were collected during February and March in 1993–1995, and 1998.Cottus bairdi were collected from Shope Fork and Ball Creek in early spring prior to spawning. We are determining age and length specific fecundities from analysis of whole ovaries. We are also investigating whether are age or length specific differences exist in egg size. We are determining sex specific growth rates back-calculation of age at length from otolith analysis.
Assessment of parentage relationships in Cottus bairdi at the Coweeta Hydrologic Laboratory in 1999
None submitted by researchers.
Figure 1 in Threatened fish: Cottus petiti Bǎcescu & Bǎcescu-Meşter, 1964 (Cottidae)
Figure 1. – Cottus petiti. Credit photo: V. Sablain / SYBLE.
Data from: Population recovery and occurrence of the endemic Rhine sculpin (Cottus rhenanus)
<p>Two datasets belonging to the paper "Population recovery and occurrence of the endemic Rhine sculpin (<em>Cottus rhenanus</em>)" published in Knowledge and Management of Aquatic Ecosystems, are provided here. Since little was known about the occurrence, densities and habitat use of<em> C. rhenanus, </em>this study was conducted. The study area was located in the River Geul and tributaries, in the south of the Netherlands.</p> <p>The first dataset "WFD 2005-2010-2015 fish data.csv" contains data of fish in transects sampled as part of ecological status assessments of water systems according to the EU Water Framework Directive. Average 300-metre transects in upstream direction in one run using handheld backpack electrofishing equipment. The second dataset "Habitat characterization Cottus rhenanus 2014.csv" contains data of the Rhine sculpin (and other encountered fish species) in relation to its habitat. The data were collected in the same way as described above. In addition, we estimated the relative abundance of each sediment type (bed substratum) per transect, which yielded the ordinal categories: 0%, <5%, 5-10%, 11-25%, 26-50%, 51-75%, and 76-100%. Distinguished sediment types were silt (mud/sludge), sand, fine granule (0.1-20 mm), pebble (21-65 mm), cobble (66-200 mm), and boulder (>200 mm). Furthermore, we estimated the percentage area of large structures (e.g., woody debris) and riffles. Finally, we measured stream width (m) and depth (cm). This was done by recording width with a tape measure and depth with a measuring rod at five (beginning, middle, end and two representatives in between) locations in a transect. The mean values were recorded as stream width and depth. The included coordinates refer to the start and end of a transect. The coordinate system used here concerns Amersfoort RD (EPSG: 28992). </p> <p>Abstract</p> <p>The Rhine sculpin (<em>Cottus rhenanus</em>) is a benthic rheophilic fish species that is endemic to tributaries of the rivers Rhine and Meuse in North-western Europe. Little is known about its occurrence and individuals density in relation to habitat characteristics. A core population of <em>C. rhenanus</em> occurs in the River Geul in the Netherlands. Since the late 19<sup>th</sup> century, this river was heavily polluted by communal and industrial wastewater, causing a strong population decline. As the core population of <em>C. rhenanus</em> is recovering, the status, distribution, and habitat use should be studied to facilitate recovery in other locations. <em>Cottus rhenanus</em> density of individuals significantly increased over the period 2005-2015 and it became one of the most abundant fish species in assemblages. Negative relationships were observed between <em>C. rhenanus</em> densities and a high abundance of boulders (> 200 mm), large structures such as woody debris, and water depth. The population increase and recolonization of <em>C. rhenanus</em> coincided with water quality improvement, which suggests that this fish species can be used to assess small streams ecosystem integrity. The recent range expansion of the Ponto-Caspian round goby (<em>Neogobius melanostomus</em>) poses a high risk of negative effects on <em>C. rhenanus</em> populations via food and shelter competition. Further water quality improvement, habitat conservation, and prevention of the spread of invasive gobies could favour <em>C. rhenanus</em> populations within their natural range.</p>
Cryptic species of freshwater sculpin (Cottidae: Cottus) in California
Open the record for dataset details and reuse information.
North Temperate Lakes site, station Allequash Lake, study of animal abundance of Cottus cognatus in units of numberPerEffort on a yearly timescale
The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from North Temperate Lakes (NTL) contains animal abundance of Cottus cognatus measurements in numberPerEffort units and were aggregated to a yearly timescale.
North Temperate Lakes site, station Allequash Lake, study of animal abundance of Cottus bairdii in units of numberPerEffort on a yearly timescale
The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from North Temperate Lakes (NTL) contains animal abundance of Cottus bairdii measurements in numberPerEffort units and were aggregated to a yearly timescale.
North Temperate Lakes site, station Big Muskellunge Lake, study of animal abundance of Cottus cognatus in units of numberPerEffort on a yearly timescale
The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from North Temperate Lakes (NTL) contains animal abundance of Cottus cognatus measurements in numberPerEffort units and were aggregated to a yearly timescale.
North Temperate Lakes site, station Big Muskellunge Lake, study of animal abundance of Cottus bairdii in units of numberPerEffort on a yearly timescale
The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from North Temperate Lakes (NTL) contains animal abundance of Cottus bairdii measurements in numberPerEffort units and were aggregated to a yearly timescale.
North Temperate Lakes site, station Lake Mendota, study of animal abundance of Cottus bairdii in units of numberPerEffort on a yearly timescale
The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from North Temperate Lakes (NTL) contains animal abundance of Cottus bairdii measurements in numberPerEffort units and were aggregated to a yearly timescale.
North Temperate Lakes site, station Sparkling Lake, study of animal abundance of Cottus bairdii in units of numberPerEffort on a yearly timescale
The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from North Temperate Lakes (NTL) contains animal abundance of Cottus bairdii measurements in numberPerEffort units and were aggregated to a yearly timescale.
North Temperate Lakes site, station Trout Lake, study of animal abundance of Cottus bairdii in units of numberPerEffort on a yearly timescale
The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from North Temperate Lakes (NTL) contains animal abundance of Cottus bairdii measurements in numberPerEffort units and were aggregated to a yearly timescale.
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