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114 results for “Body Length”
Standard body length of Euphausia superba collected with a 2-m, 700-um net towed from surface to 120 m, collected aboard Palmer LTER annual cruises off the coast of the Western Antarctic Peninsula, 2009 - 2024.
Antarctic krill, Euphausia superba, are a critical food-web link between phytoplankton primary production and higher trophic levels, such as whales, penguins, and seals. Krill standard length was measured from LTER zooplankton tows along the western Antarctic Peninsula. Annual cruises take place between late December to early February, except for the NBP21-13 cruise, which was November and December. Length data provides estimates of age-class abundance and recruitment. Climate-induced changes in krill recruitment are an important consideration in the management and modelling of krill populations.
Two decades of body length measurements in size-structured larval and juvenile fish populations in English rivers.
<p>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. </p> <p><br>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.</p> <p>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.</p> <p><br>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 (m<sup>2</sup>) 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.</p> <p>Description of columns found in the dataset:</p> <p> </p> <table> <tbody> <tr> <td> <p><strong>Column heading</strong></p> </td> <td> <p><strong>Column description</strong></p> </td> <td> <p><strong>Data type</strong></p> </td> <td> <p><strong>Units</strong></p> </td> </tr> <tr> <td> <p>Fish _Catchment</p> </td> <td> <p>The river catchment/basin location of each fish site</p> </td> <td> <p>Text</p> </td> <td> <p>n/a</p> </td> </tr> <tr> <td> <p>Fish_River</p> </td> <td> <p>The river/watercourse location of each fish site.</p> </td> <td> <p>Text</p> </td> <td> <p>n/a</p> </td> </tr> <tr> <td> <p>Fish_SiteName</p> </td> <td> <p>The name of each fish site</p> </td> <td> <p>Text</p> </td> <td> <p>n/a</p> </td> </tr> <tr> <td> <p>Fish_Latitude</p> </td> <td> <p>The latitude of each fish site (WGS 1984)</p> </td> <td> <p>Integer</p> </td> <td> <p>Decimal degrees</p> </td> </tr> <tr> <td> <p>Fish_Longitude</p> </td> <td> <p>The longitude of each fish site (WGS 1984)</p> </td> <td> <p>Integer</p> </td> <td> <p>Decimal degrees</p> </td> </tr> <tr> <td> <p>Fish_Area</p> </td> <td> <p>Area of fish site surveyed</p> </td> <td> <p>Integer</p> </td> <td> <p>m<sup>-2</sup></p> </td> </tr> <tr> <td> <p>Fish_SurveyDate</p> </td> <td> <p>Date fish survey was carried out</p> </td> <td> <p>Integer</p> </td> <td> <p>dd/mm/yyyy</p> </td> </tr> <tr> <td> <p>Fish_Year</p> </td> <td> <p>Year fish survey was carried out</p> </td> <td> <p>Integer</p> </td> <td> <p>yyyy</p> </td> </tr> <tr> <td> <p>Common_Name</p> </td> <td> <p>The common/vernacular name of each fish taxon recorded in the dataset.</p> </td> <td> <p>Text</p> </td> <td> <p>n/a</p> </td> </tr> <tr> <td> <p>Latin_Name</p> </td> <td> <p>The scientific name of each fish taxon recorded in the dataset</p> </td> <td> <p>Text</p> </td> <td> <p>n/a</p> </td> </tr> <tr> <td> <p>Net_Number</p> </td> <td> <p>The net number the fish in a given survey were caught on</p> </td> <td> <p>Integer</p> </td> <td> <p>n/a</p> </td> </tr> <tr> <td> <p>Length_mm</p> </td> <td> <p>Length of individual fish caught</p> </td> <td> <p>Integer</p> </td> <td> <p>mm</p> </td> </tr> <tr> <td> <p>Count</p> </td> <td> <p>Count of fish caught accounting for sub- sampling</p> </td> <td> <p>Integer</p> </td> <td> <p>Number of fish</p> </td> </tr> </tbody> </table> <p> </p>
Spreadsheet Template for Body Length Data for North American Beetles
<p>Body size data for North American beetles extracted from The Insects and Arachnids of Canada:</p> <p>Anderson, R.S., Peck, S.B., 1985. The insects and arachnids of Canada, Part 13. The Carrion Beetles of Canada and Alaska: Coleoptera: Silphidae and Agyrtidae. Research Branch Agriculture Canada Publication 1778: 1-121.</p> <p>Bright, D.E., 1976. The insects and arachnids of Canada, Part 2. The bark beetles of Canada and Alaska: Coleoptera: Scolytidae. Research Branch Agriculture Canada Publication 1576: 1-241. </p> <p>Bright, D.E., 1987. The insects and arachnids of Canada, Part 15. The Metallic Wood-boring Beetles of Canada and Alaska. Coleoptera: Buprestidae. Research Branch Agriculture Canada Publication 1810: 1-335.</p> <p>Bright, D.E., 1993. The insects and arachnids of Canada, Part 21. The Weevils of Canada and Alaska: Volume 1. Coleoptera: Curculionoidea, excluding Scolytidae and Curculionidae. Research Branch Agriculture Canada Publication 1882: 1-217.</p>
Caudal fin area: body length ratio (A:L 2; mean..) FIGURE 5 CF s S E measured from photographs of Salmo trutta parr at 20 and 32 weeks after exercise treatment initiation. A:L 2 values between the two CF s groups were significantly different (Welch's two sample t- test p <0.05) in Body shape and robustness response to water flow during development of brown trout Salmo trutta parr
Caudal fin area: body length ratio (A:L 2; mean..) FIGURE 5 CF s S E measured from photographs of Salmo trutta parr at 20 and 32 weeks after exercise treatment initiation. A:L 2 values between the two CF s groups were significantly different (Welch's two sample t- test p <0.05)
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
Text-fig. 2. The methods of measurements. H – horizontal plane, HB – body height, SL – skull length, TL – total body length, 1 – the angle which the dorsal lobe of the caudal fin forms with the horizontal plane, 2 – the angle which the ventral lobe of the caudal fin forms with the horizontal plane, 3 – the angle which the scale row in front of the anal fin forms with the horizontal plane. in Actinopterygians Of The Broumov Formation (Permian) In The Czech Part Of The Intra-Sudetic Basin (The Czech Republic)
Text-fig. 2. The methods of measurements. H – horizontal plane, HB – body height, SL – skull length, TL – total body length, 1 – the angle which the dorsal lobe of the caudal fin forms with the horizontal plane, 2 – the angle which the ventral lobe of the caudal fin forms with the horizontal plane, 3 – the angle which the scale row in front of the anal fin forms with the horizontal plane.
Fig. 5 in Wing-Length, Body Mass And Fat Reserves Of Robins (Erithacus Rubecula) During Autumn Migration In Hungary
Fig. 5. Mean body mass changes of the recaptured juveniles (Wilcoxon test, Tömörd, N = 84, W = 1986, p <0.05; Sumony, N = 104, W = 2744, NS; Ócsa, N = 141, W = 7135, p <0.001; Szalonna, N = 124 W = 4279, p <0.05. Since only a few individuals were recaptured in Izsák during the study period
Fig. 3 in Wing-Length, Body Mass And Fat Reserves Of Robins (Erithacus Rubecula) During Autumn Migration In Hungary
Fig. 3. Dendrogram of the cluster analysis of the juveniles' body mass in August (A), September (B), October (C) at the study sites (Euclides distance and Ward-Orlóczy method)
Fig. 4 in Wing-Length, Body Mass And Fat Reserves Of Robins (Erithacus Rubecula) During Autumn Migration In Hungary
Fig. 4. Mean fat reserves changes of the recaptured juveniles (Wilcoxon test, Tömörd, N = 84, W = 1282, p <0.05; Sumony, N = 105, W = 1079, NS; Ócsa, N = 141, W = 1967, p <0.05; Szalonna, N = 124 W = 1757, p <0.001. Since only a few individuals were recaptured in Izsák during the study pe-
Fig. 2 in Wing-Length, Body Mass And Fat Reserves Of Robins (Erithacus Rubecula) During Autumn Migration In Hungary
Fig. 2. Dendrogram of the cluster analysis of the juveniles' wing-length in August (A), September (B), October (C) at the study sites (Euclides distance and Ward-Orlóczy method)
FIGURE 8 in Body length estimation of Neogene macrophagous lamniform sharks (Carcharodon and Otodus) derived from associated fossil dentitions
FIGURE 8. Correlation between summed crown width and total body length in 17 modern Carcharodon carcharias individuals, comparing the upper versus lower dentition. (A) linear function (upper dentition: R2 = 0.93); (B) power function (upper dentition: R2 = 0.97); (C) linear function (lower dentition: R2 = 0.90); and (D) power function (lower dentition: R2 = 0.95).
FIGURE 3 in Body length estimation of Neogene macrophagous lamniform sharks (Carcharodon and Otodus) derived from associated fossil dentitions
FIGURE 3. Associated dentitions of Otodus megalodon in lingual view. (A) UF-VP-311000; (B) GHC 1; (C) CH-31- 46P; and (D) UF-VP-460000. Scale bars equal 5 cm.
FIGURE 4 in Body length estimation of Neogene macrophagous lamniform sharks (Carcharodon and Otodus) derived from associated fossil dentitions
FIGURE 4. Associated dentitions of Otodus chubutensis in lingual view. (A) USNM 411881 (adapted from Perez et al., 2019; fig. 5); (B) USNM 299832; (C) GHC 3; and (D) UF-VP-312864. Scale bars equal 5 cm.
FIGURE 1 in Body length estimation of Neogene macrophagous lamniform sharks (Carcharodon and Otodus) derived from associated fossil dentitions
FIGURE 1. Premise of summed crown width method. (A) Carcharodon carcharias dentition in lingual view, with applicable terminology. The right half is an illustration of the typical dental formula for C. carcharias. The left half is from a 5.18 m female with one less posterior tooth in the lower tooth series (originally figured in Hubbell, 1996; figure 5). Scale bar equals 5 cm. (B) The most complete known associated dentition of Otodus megalodon (CH-31-46P) in lingual view. Scale bar equals 5 cm. (C) Body length of fossil taxa is calculated under the assumption that the ratio of summed crown width to total body length (TL) is proportional in ecologically and taxonomically related species. Silhouette proportions for O. megalodon are based on Cooper et al. (2020). A/a = anterior, I = intermediate, and L/l = lateral. Uppercase letters denote upper teeth and lowercase letters denote lower teeth.
Fig. 4. Schizoplax brandtii, body length 8.5 in Schizoplax brandtii (Middendorff, 1847) (Mollusca: Polyplacophora) - пример «внезапного видообразования»?
Fig. 4. Schizoplax brandtii, body length 8.5 mm, Unalaska Isl., Aleutian, depth 1 m. A, B, C – valves I, V and VIII, dorsal view; D – valve VIII lateral view; E – valve IV, ventral view; F – valve V, dorsal view; G – valve V, tegmentum surface; H – valve III, rostral view.
Figure 3. Comparison between potential ant model and membracid mimic. Both specimens have the same body length. A–B in First reports of species-specific ant resemblance in heteronotine treehoppers (Hemiptera: Membracidae: Heteronotinae)
Figure 3. Comparison between potential ant model and membracid mimic. Both specimens have the same body length. A–B) Cephalotes atratus (Linnaeus, 1758), worker. A) Habitus, dorsal. B) Head and anterior part of mesothorax, dorsal. C–D) Heteronotus fabulosus Boulard, 1981. C) Habitus, dorsal. CS = Cornus suprahumeralis; L = length between apex of CS and apex of NT; NPS = Spina nodus primus; NT = Nodus terminalis; PS = Spina pedunculus. D) Anterior part of pronotum; head, wings and legs omitted. E) Cephalotes atratus worker habitus, lateral. F) Heteronotus fabulosus habitus, lateral. Numbered structures in the figures reference the numbering system used for morphological comparisons in Figure 4.
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