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openCC (other)Jan 2020View details →

Fish tagging data (length, weight, tag number) from the Kuparuk, the Sagavanirktok (primarily Oksrukuyik Creek) and the Itkillik (primarily the I-Minus outlet stream) watersheds, 2009 - 2017

Since 2009, the FISHSCAPE Project (grant number 1719267, 1417754, and 0902153), based at Toolik Field Station, has monitored physical, chemical, and biological parameters within three watersheds: The Kuparuk (including Toolik Lake and Toolik outlet stream); The Sagavanirktok (primarily Oksrukuyik Creek, but also including sections of the Ailish and Atigun Rivers and the Galbraith Lakes); and The Itkillik (primarily the I-Minus outlet stream, a tributary that that feeds into the Itkilik River). Target species were primarily Arctic grayling and Lake trout, although Arctic char, Burbot, Dolly varden, round whitefish, and slimey sculpin were also captured. Fish were collected on each river/lake. Coordinates and/or specific station locations were noted. All fish captured during the field season are measured, weighed, tagged (if large enough) and released. If fish were not previously tagged, they were tagged with Passive Integrated Transponder (PIT) tags which can be read with a whole stream antenna to track the migration of the fish, predminately Arctic grayling, throughout the systems.

openCC (other)Feb 2024View details →

Standard Lengths and Mean Weights for Prey-base Fishes from Taylor River and Joe Bay Sites, Everglades National Park (FCE), South Florida from January 2000 to April 2004

Prey-base fishes. The small demersal fishes of the coastal wetlands are a keystone element in this ecosystem. They are the primary and secondary consumers of the plants mentioned above and they are the primary food resource for myriad piscine (e.g. game species of fish), reptilian (e.g. juvenile crocodiles) and avian (e.g. wading birds) predators. The community dynamics of these fishes are dictated by hydrologic and hydrographic parameters so they also respond predictably to water management practices. Because they are a bottle-neck in the food web, their abundance and availability dictate the success of higher trophic levels. Fish are sampled in June, September and monthly from November through April at five locations. A 9m2 drop trap designed specifically for this habitat are used to quantify fish use. Nine traps are used at each site.

openCC (other)Dec 2022View details →

WDNR Yahara Lakes Fisheries: Fish Lengths and Weights 1987-1998

These data were collected by the Wisconsin Department of Natural Resources (WDNR) from 1987-1998. Most of these data (1987-1993) precede 1995, the year that the University of Wisconsin NTL-LTER program took over sampling of the Yahara Lakes. However, WDNR data collected from 1997-1998 (unrelated to LTER sampling) is also included. In 1987 a joint project by the WDNR and the University of Wisconsin-Madison, Center for Limnology (CFL) was initiated on Lake Mendota. The project involved biomanipulation of fish communities within the lake, which was acheived by stocking game fish species (northern pike and walleye). The goal was to induce a trophic cascade that would improve the water clarity of Lake Mendota. See Lathrop et al. 2002. Stocking piscivores to improve fishing and water clarity: a synthesis of the Lake Mendota biomanipulation project. Freshwater Biology 47, 2410-2424. In collecting these data, the objective was to gather population data and monitor populations to track the progress of the biomanipulation. The data is dominated by an assesssment of the game fishery in Lake Mendota, however other Yahara Lakes and non-game fish species are also represented. A combination of gear types was used to gather the population data including boom shocking, fyke netting, mini-fyke netting, seining, and gill netting. Not every sampling year includes length and weight data from all gear types. The WDNR also carried out randomized, access-point creel surveys to estimate fishing pressure, catch rates, harvest, and exploitation rates. Five data files each include length-weight data, and are organized by the type of gear or method which was used to collect the data: 1) fyke, mini-fyke, and seine netting 2) boom shocking 3) gill netting (1993 only) 4)walleye age as determined by scale and spine analysis (1987 only), and 5) creel survey. The final data file contains creel survey information: number of anglers fishing the shoreline, and number of anglers that started and complete

openCustomJul 2024View details →

Fish Counts and Lengths in South Bay and Hog Island Bay, Virginia 2012-2018

To study how seagrass restoration affects coastal fish communities over time, we sampled fishes at each site once or twice per year with beach seines (7.6 m wide × 1.8 m tall; 1.5 m deep pocket with 6.4 mm mesh) hauled along 25-m transects in the summer (May or June) and autumn (September or October) from 2012 through 2018. Researchers ceased sampling at the 4 initially unvegetated sites in South Bay after 2015, when these sites were colonized by seagrass, although seining occurred once more at these sites during the autumn of 2017. During each sampling event, we counted, measured (total length), and identified fish to the lowest possible taxon in the field prior to release. All seine hauls occurred during the day and within 3 hours of low tide for logistical reasons (n = 204). Due to methodological changes, after 2018 surveys are recorded in a different dataset VCR22364 "Abundance and Size of Seagrass-Associated Fishes in the Virginia Coastal Lagoons, 2019-xxxx" https://doi.org/10.6073/pasta/400c84b859e81e9a1e5212bccb37b759.

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Two decades of body length measurements in size-structured larval and juvenile fish populations in English rivers.

Long term ecological datasets are valuable in providing context and understanding to complex ecological processes that occur over broad temporal scales, and provide a baseline for analysing change. Monitoring of fish populations in UK waterbodies and elsewhere is typically through measuring the length of individual fish caught in surveys. Through this method, the age structure of fish populations can be determined, as well as over winer survival rates and future recruitment success and cohort sizes can be predicted. The larval and juvenile period are when fish are considered most vulnerable to predation, competition, disease and environmental perturbations.  This study presents the first long-term larval and juvenile fish lengths dataset for 67 survey sites over two decades (1999-2018) from the rivers Ancholme, Warwickshire Avon, Don, Trent, and Yorkshire Ouse (including the Swale, Ure, Nidd and Wharfe) in the United Kingdom. These rivers represent a range of topographical and biotopical characteristics. For the majority of this study, surveys were conducted on a monthly or fortnightly basis making both annual and seasonal analyses of size structure, growth and body length possible. Although there is some variation in the sampling frequency and some locations varied throughout the study according to requirements. In total, more than 380,000 larval or juvenile fish of 30 species were measured, likely representing one of the most comprehensive datasets of its type. Surveys were conducted in river margins, where the velocity was slowest and larval and juvenile fish tend to aggregate. Fish were captured using a 25 x 3 m micromesh (3 mm mesh size) seine net that was set in a rectangle parallel to the bank. This net capture fish as small as 5 mm and is the most appropriate method of catching larvae and juvenile fish, although occasionally some larger adult fish may have also been captured and measured as part of this dataset for completeness. All fish were identified to species and measured to standard length (mm) and released at the point of capture. The exception was the smallest larvae, which were euthanised with an overdose of methanesulphonate (MS-222) and preserved in 4% formalin solution for microscopic examination. The dataset contains 384,090 rows and 13 columns. Each row corresponds to a single fish that was measured at each site and date. Associated site information (site name, location, area fished (m2) and survey date) is reported for each row. When only a fraction of the catch was processed, the sub-sample size was reflected in the Count column (e.g. when half the sample was processed, the numbers of fish measured or only counted were multiplied by two). This enables accurate densities to be calculated as the total number of both measured and unmeasured fish is recorded. Description of columns found in the dataset:   <table> <tbody> <tr> <td> Column heading </td> <td> Column description </td> <td> Data type </td> <td> Units </td> </tr> <tr> <td> Fish _Catchment </td> <td> The river catchment/basin location of each fish site </td> <td> Text </td> <td> n/a </td> </tr> <tr> <td> Fish_River </td> <td> The river/watercourse location of each fish site. </td> <td> Text </td> <td> n/a </td> </tr> <tr> <td> Fish_SiteName </td> <td> The name of each fish site </td> <td> Text </td> <td> n/a </td> </tr> <tr> <td> Fish_Latitude </td> <td> The latitude of each fish site (WGS 1984) </td> <td> Integer </td> <td> Decimal degrees </td> </tr> <tr> <td> Fish_Longitude </td> <td> The longitude of each fish site (WGS 1984) </td> <td> Integer </td> <td> Decimal degrees </td> </tr> <tr> <td> Fish_Area </td> <td> Area of fish site surveyed </td> <td> Integer </td> <td> m-2 </td> </tr> <tr> <td> Fish_SurveyDate </td> <td> Date fish survey was carried out </td> <td> Integer </td> <td> dd/mm/yyyy </td> </tr> <tr> <td> Fish_Year </td> <td> Year fish survey was carried out </td> <td> Integer </td> <td> yyyy </td> </tr> <tr> <td> Common_Name </td> <td> The common/vernacular name of each fish taxon recorded in the dataset. </td> <td> Text </td> <td> n/a </td> </tr> <tr> <td> Latin_Name </td> <td> The scientific name of each fish taxon recorded in the dataset </td> <td> Text </td> <td> n/a </td> </tr> <tr> <td> Net_Number </td> <td> The net number the fish in a given survey were caught on </td> <td> Integer </td> <td> n/a </td> </tr> <tr> <td> Length_mm </td> <td> Length of individual fish caught </td> <td> Integer </td> <td> mm </td> </tr> <tr> <td> Count </td> <td> Count of fish caught accounting for sub- sampling </td> <td> Integer </td> <td> Number of fish </td> </tr> </tbody> </table>

opencc-by-4.0Aug 2024View details →

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Lake Wingra: Fish Lengths and Weights 1995 - current

Data are collected annually to enable us to track the fish assemblages of Lake Wingra. Sampling is done at six littoral zone sites per lake with a beach seine, minnow or crayfish traps, and fyke nets, while a boat-mounted electrofishing system samples four littoral transects. Vertically hung gill nets are used to obtain two pelagic samples per lake from the deepest point. A trammel net samples across the thermocline at two nearshore sites per lake. Fish are identified to species. Lengths are measured for all fish caught, while weight and scale are collected from a subset. Derived data includes catch per unit effort and size distribution by species, lake, and year. Sampling Frequency: annually. Number of sites: 1. Note that 2020 data does not exist due to insufficient sampling.

openCC (other)Dec 2024View details →

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North Temperate Lakes LTER: Fish Lengths and Weights 1981 - current

Data are collected annually to enable us to track the fish assemblages of eleven primary lakes (Allequash, Big Muskellunge, Crystal, Sparkling, Trout, bog lakes 27-02 [Crystal Bog] and 12-15 [Trout Bog], Mendota, Monona, Wingra and Fish). Sampling on Lakes Monona, Wingra, and Fish started in 1995; sampling on other lakes started in 1981. Sampling is done at six littoral zone sites per lake with seine, minnow or crayfish traps, and fyke nets; a boat-mounted electrofishing system samples four littoral transects. Vertically hung gill nets are used to obtain two pelagic samples per lake from the deepest point. A trammel net samples across the thermocline at two sites per lake. In the bog lakes only fyke nets and minnow traps are deployed. Parameters measured include species-level identification and lengths for all fish caught, and weight and scale samples from a subset. Dominant species vary from lake to lake. Perch, rockbass, and bluegill are common, with walleye, large and smallmouth bass, northern pike and muskellunge as major piscivores. Cisco have been present in the pelagic waters of four lakes, and an exotic species, rainbow smelt, is present in two. The bog lakes contain mudminnows. Beach seining was discontinued after the 2019 season. The only sampling done in 2020 were a single gill-netting replicate in Sparkling, Crystal, and Trout lakes. Sampling in Fish Lake was missed in 2021 due to significant lake level changes. Data from the two bogs is missing in 2022. Sampling Frequency: annually Number of sites: 11.

openCC (other)Dec 2024View details →

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North Temperate Lakes LTER: Fish Length Frequency 1981 - current

This data set is a derived data set based on fish catch and length data. Data are collected annually to enable us to track the fish assemblages of eleven primary lakes (Allequash, Big Muskellunge, Crystal, Sparkling, Trout, bog lakes 27-02 [Crystal Bog] and 12-15 [Trout Bog], Mendota, Monona, Wingra and Fish). Sampling on Lakes Monona, Wingra, and Fish started in 1995; sampling on other lakes started in 1981. Sampling is done at six littoral zone sites per lake with seine, minnow or crayfish traps, and fyke nets; a boat-mounted electrofishing system samples three littoral transects. Vertically hung gill nets are used to obtain two pelagic samples per lake from the deepest point. A trammel net samples across the thermocline at two sites per lake. In the bog lakes only fyke nets and minnow traps are deployed. Parameters measured include species-level identification and lengths for all fish caught, and scale samples and weight from a subset. Derived data sets include species richness, catch per unit effort, and size distribution by species, lake, and year. Dominant species vary from lake to lake. Perch, rockbass, and bluegill are common, with walleye, large and small mouth basses, northern pike and muskellunge as major piscivores. Cisco have been present in the pelagic waters of four lakes, and the exotic species, rainbow smelt, is present in two. The bog lakes contain mudminnows. Protocol used to generate data: The number of fish caught in each five mm length interval (0<length<5, 5<=length<10, etc.) have been summed over gear. In cases in which only a random subsample of fish were measured, the unmeasured fish have been assigned to the length categories based on the proportions in length categories for the measured fish of the subsample. Day seines were only used in 1981 and have been eliminated from this data set to make sampling effort across years comparable. Beach seining was discontinued after 2019. The only sampling done in 2020 were a single gill-netting repli

openCC (other)Dec 2024View details →

F I G U R E 5 in Length-weight relationships of 55 mesopelagic fishes from the eastern tropical North Atlantic: Across- and within-species variation (body shape, growth stanza, condition factor)

F I G U R E 5 Log–log plot of the relative condition factor (Krel) vs. standard length (cm) calculated from length–weight relationships (LWRs) of the species (a) Argyropelecus affinis, (b) Argyropelecus sladeni, (c) Ceratoscopelus warmingii, (d) Diaphus dumerilii, (e) Electrona risso, (f) Lampanyctus nobilis, (g) Lepidophanes guentheri, (h) Notoscopelus resplendens and (i) Scopelogadus mizolepis (Table 3). Geographic regions are indicated by linetype, symbol and colour (EQ–C, dotted line, dark-blue square; EQ–N, two-dashed line, turquoise triangle; LO–E, solid line, red circle; LO–W, dashed line, violet diamond). If present, vertical dashed grey line indicates breakpoint in the LWR estimated by segmented regression analysis (cf. Table 2)

F I G U R E 1 in Length-weight relationships of 55 mesopelagic fishes from the eastern tropical North Atlantic: Across- and within-species variation (body shape, growth stanza, condition factor)

F I G U R E 1 Stations in the eastern low-oxygen (LO–E), western low-oxygen (LO–W), northern equatorial (EQ–N) and central equatorial (EQ–C) regions of the eastern tropical North Atlantic sampled in this study

F I G U R E 4 in Length-weight relationships of 55 mesopelagic fishes from the eastern tropical North Atlantic: Across- and within-species variation (body shape, growth stanza, condition factor)

F I G U R E 4 Distribution of form factor a3.0 for 55 mesopelagic species related to (a) body shape, (b) taxonomic family and (c) species. Form factor calculated from Equation 2 using across-species slope of S = 1.358 based on 1223 fish species presented in equation 17 in Froese (2006)

F I G U R E 3 in Length-weight relationships of 55 mesopelagic fishes from the eastern tropical North Atlantic: Across- and within-species variation (body shape, growth stanza, condition factor)

F I G U R E 3 Scatter plot of mean log a (SL) over mean b for 55 mesopelagic species with information on body shape. Body shape:, elongated;, fusiform;, short-deep

F I G U R E 2 in Length-weight relationships of 55 mesopelagic fishes from the eastern tropical North Atlantic: Across- and within-species variation (body shape, growth stanza, condition factor)

F I G U R E 2 Frequency distribution of (a) mean log a (binwidth 0.2) and (b) mean exponent b (binwidth 0.1) based on 55 records (measured in centimetres and grams) of mesopelagic species of the eastern tropical North Atlantic during cruise WH383

opencc-by-4.0Nov 2023View details →

F I G U R E 8 Total length v in Biological information on a rare pelagic fish, black ruff Centrolophus niger, caught in Icelandic waters: Distribution, feeding, and otoliths

F I G U R E 8 Total length v. (a) total weight, (b) fork length, and (c) standard length for black ruff Centrolophus niger (Gmelin, 1789) from the current and previous studies. The origin of the previous data is indicated in the legend. (a) Nonlinear and (b, c) linear regression models are shown. Note that total weight corresponds to frozen weight for measurements in the current study, whereas for previous studies, corresponds to the weight given in the respective study.

opencc-by-4.0Nov 2023View details →

F I G U R E 7 Total length v in Biological information on a rare pelagic fish, black ruff Centrolophus niger, caught in Icelandic waters: Distribution, feeding, and otoliths

F I G U R E 7 Total length v. (a) frozen weight, (b) fork length, (c) and standard length and frozen weight v. (d) thawed weight for black ruff Centrolophus niger (Gmelin, 1789). (a) Nonlinear and (b–d) linear regression models are shown (a–d) as well as x = y line (d).

opencc-by-4.0Dec 2021View details →

Fig. 3 in The Relationship Between Fish Length And Otolith Size And Weight Of The Australian Anchovy, Engraulis Australis (Clupeiformes, Engraulidae), Retrieved From The Food Of The Australasian Gannet, Morus Serrator (Suliformes, Sulidae), Hauraki Gulf, New Zealand

Fig. 3. Fish total length relationship with: A — otolith length; B — otolith width; C — otolith weight.

opencc-by-4.0Dec 2021View details →

Fig. 2. A in The Relationship Between Fish Length And Otolith Size And Weight Of The Australian Anchovy, Engraulis Australis (Clupeiformes, Engraulidae), Retrieved From The Food Of The Australasian Gannet, Morus Serrator (Suliformes, Sulidae), Hauraki Gulf, New Zealand

Fig. 2. A, Engraulis australis, 138 mm TL; B, Otolith of Engraulis australis, 135 mm TL showing otolith sizes, length (OL) and width (OW).

opencc-by-4.0Jan 2019View details →

Fig. 4 in Length-Weight Relationships And Condition Factors Of The Naleh Fish Barbonymus Gonionotus (Pisces, Cyprinidae) Harvested From Nagan Raya Waters, Indonesia

Fig. 4. Comparison of observed and predicted growth for B. gonionotus males (a) and females (b) sampled during January 2017 to December 2017. Total number of FIsh = 135 females, 626 males. Predicted growth curve for males, y = 0.317x – 20.3 R2 = 0.970, and for females: y = 0.330x – 21.40, R2 = 0.979.