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Articoli di riviste sul tema "Opilio"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 19 febbraio 2022

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1

Bakanev, Sergey. "Dispersion and assessment of possible distribution of snow crab opilio (Chionoecetes opilio) in the Barents Sea". Principles of the Ecology 15, n. 3 (settembre 2015): 27–39. http://dx.doi.org/10.15393/j1.art.2015.4401.

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2

Motobayashi, Hirohito, Toshiaki Miyadai e Tadashi Isshiki. "Experimental infection of snow crab Chionoecetes opilio with the Chionoecetes opilio bacilliform virus (CoBV)". Fisheries Science 84, n. 1 (4 novembre 2017): 17–24. http://dx.doi.org/10.1007/s12562-017-1146-5.

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3

Snegovaya, Nataly Yu. "TWO NEW OPILIO HERBST, 1798 SPECIES (ARACHNIDA: OPILIONES: PHALANGIIDAE) FROM CAUCASUS REGION". Ecologica Montenegrina 8 (14 luglio 2016): 27–33. http://dx.doi.org/10.37828/em.2016.8.3.

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4

Il Lee, Sung, Jung Nyun Kim, Hyun-Woo Kim, Chul-Woong Oh e Jong-Hun Na. "Relative Growth of Three Chionoecetes Crabs (decapoda, Majidae) in the East Sea, Korea". Crustaceana 84, n. 8 (2011): 897–904. http://dx.doi.org/10.1163/001121611x584316.

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AbstractSnow crabs, Chionoecetes spp., are among the commercially most important species of Decapoda in the world, and proper stock assessment and management are required for their sustainable use. In the present study, morphological characteristics of three snow crabs, Chionoecetes japonicus, Chionoecetes opilio and a hybrid form exhibiting characteristics intermediate between those of the parent species, Chionoecetes japonicus/opilio, have been compared. The ratio of carapace length including rostral horn (CL(RL)) to carapace width (CW) in C. japonicus, C. opilio, and the C. japonicus/opilio hybrid was 0.973 ± 0.020, 0.983 ± 0.019, and 0.956 ± 0.019, respectively. The only significant difference in regression slope among the three crabs, was between CW and chela height (CH), indicating that at a given size, the hybrid form is the fastest in the growth of chela height in relation to carapace width. In C. japonicus and C. opilio, the relationship between CW and total weight (TW) was significantly negatively allometric, while in the hybrids, it was significantly positively allometric. This indicates that at a given size, the hybrid form is heavier than the others.

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5

Incze, Lewis S., David A. Armstrong e Sharon L. Smith. "Abundance of Larval Tanner Crabs (Chionoecetes spp.) in Relation to Adult Females and Regional Oceanography of the Southeastern Bering Sea". Canadian Journal of Fisheries and Aquatic Sciences 44, n. 6 (1 giugno 1987): 1143–56. http://dx.doi.org/10.1139/f87-137.

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Abundances of larval Chionoecetes bairdi and C. opilio in the southeastern Bering Sea are compared for springs of 1978 through 1981. Geographical subareas of the shelf were designated for statistical analysis of results to accommodate variations in hydrographic conditions and circulation, distribution of benthic populations, and distribution of planktonic sampling effort. Maximum observed abundances of first-stage zoeae were 1230 and 12 697∙m−2 for C. bairdi (during May) and C. opilio (during April), respectively. Numbers exceeding 10% of these values were common over some portions of the shelf during all years of study. Significant (P < 0.001) interannual differences in larval abundance were detected: in three subareas for C. opilio and in one for C. bairdi. The sharp decline in abundance of larval C. opilio after 1979 in two of the subareas could be accounted for by regional declines in numbers of adult female crabs. This was not true of the remaining subarea where two weak larval year-classes of C. opilio (1980 and 1981) and one of C. bairdi (1980) occurred despite an abundance of adult females. Vertical distribution of larval crabs is shown and the potential roles of advection, planktonic conditions, and reproductive output are evaluated with respect to observed patterns of larval abundance.

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6

Gubański, M. "Inhibitor wirusa mozaiki tytoniowej z kosarzy (Phalangium opilio L.) [Tobacco mosaic virus inhibitor in Phalangium opilio L.]". Acta Societatis Botanicorum Poloniae 32, n. 2 (2015): 427–33. http://dx.doi.org/10.5586/asbp.1963.024.

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7

Matsuto, Shigeki, R. A. Stockton e Kurt J. Irgolic. "Arsenobetaine in the red crab, Chionoecetes opilio". Science of The Total Environment 48, n. 1-2 (gennaio 1986): 133–40. http://dx.doi.org/10.1016/0048-9697(86)90159-2.

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8

-Asunción Lage-Yusty, María, María Vilasoa-Martínez, Susana Álvarez-Pérez e Julia López-Hernández. "Chemical composition of snow crab shells (Chionoecetes opilio) Composición química del caparazón del cangrejo de las nieves (Chionoecetes opilio)". CyTA - Journal of Food 9, n. 4 (dicembre 2011): 265–70. http://dx.doi.org/10.1080/19476337.2011.596285.

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9

Rouleau, C., C. Gobeil e H. Tjälve. "Cadmium accumulation in the snow crab Chionoecetes opilio". Marine Ecology Progress Series 224 (2001): 207–17. http://dx.doi.org/10.3354/meps224207.

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10

SANKEY, J. H. P. "On the Harvestman, Opilio saxatilis (C. L. Koch)". Proceedings of the Zoological Society of London 119, n. 2 (20 agosto 2009): 297–300. http://dx.doi.org/10.1111/j.1096-3642.1949.tb00880.x.

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11

Kim, Sung-Han. "Winter Occurrence Pattern of Chionoecetes opilio around Wangdol Reef in the East Sea near Uljin". Korean Journal of Fisheries and Aquatic Sciences 43, n. 6 (31 dicembre 2010): 670–78. http://dx.doi.org/10.5657/kfas.2010.43.6.670.

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12

MIHÁL, Ivan, Peter GAJDOŠ e Pavel ŽILA. "Harvestmen (Arachnida: Opiliones) of open biotopes in the Poloniny National Park (north-eastern Slovakia)". Fragmenta Faunistica 58, n. 1 (2015): 51–58. http://dx.doi.org/10.3161/00159301ff2015.58.1.051.

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Opiliofauna of open biotopes in the Poloniny National Park is presented. The biotopes include the variably utilized or successively overgrowing grasslands. During the period 2011–2013, we found 21 species of harvestmen which represent 60% of the Slovak opiliofauna. The highly eudominant species was Phalangium opilio. The open and sunny biotopes as meadows and pastures proved to be typical habitats for P. opilio and Oligolophus tridens. Other dominant species were: Trogulus nepaeformis and Lacinius ephippiatus. The Carpathian endemics: Paranemastoma kochi and Ischyropsalis manicata as well as thermophilic species Egaenus convexus, Lacinius horridus and Zachaeus crista were also found in the study sites.

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13

Puebla, Oscar, Jean-Marie Sévigny, Bernard Sainte-Marie, Jean-Claude Brêthes, AnnDorte Burmeister, Earl G. Dawe e Mikio Moriyasu. "Population genetic structure of the snow crab (Chionoecetes opilio) at the Northwest Atlantic scale". Canadian Journal of Fisheries and Aquatic Sciences 65, n. 3 (1 marzo 2008): 425–36. http://dx.doi.org/10.1139/f07-163.

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Marine species with planktonic larval durations of several months (teleplanic larvae) can potentially maintain demographic connectivity across large geographical distances. This perspective has important fundamental and applied implications, notably for the understanding of evolutionary and ecological processes in the marine realm, the implementation of marine protected areas, and fisheries management. Here we present, at the scale of the Northwest Atlantic, a spatial analysis of snow crab (Chionoecetes opilio, Majoidea) population genetic structure, a species that has a planktonic larval phase of 3 to 5 months. Eight microsatellite markers analysed on 847 C. opilio samples from 13 locations revealed an absence of significant genetic structure along the west coast of Greenland and within Atlantic Canada from southern Labrador to Nova Scotia. These results are consistent with a scenario of extensive demographic connectivity among C. opilio populations and have implications for the management of this species, which supports one of the most important Canadian and Greenlandic fisheries in terms of economic value. A genetic break is nevertheless identified between Greenland and Atlantic Canada, showing that genetic structure can develop within seas (the Labrador Sea in this case) despite the occurrence of very long planktonic larval stages.

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14

Beninger, Peter G., Robert W. Elner e Yves Poussart. "Gonopods of the Majid Crab Chionoecetes opilio (O. Fabricius)". Journal of Crustacean Biology 11, n. 2 (maggio 1991): 217. http://dx.doi.org/10.2307/1548359.

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15

Newton, Blake L., e Kenneth V. Yeargan. "Population Characteristics ofPhalangium opilio(Opiliones: Phalangiidae) in Kentucky Agroecosystems". Environmental Entomology 31, n. 1 (1 febbraio 2002): 92–98. http://dx.doi.org/10.1603/0046-225x-31.1.92.

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16

Ennis, G. P., R. G. Hooper e D. M. Taylor. "Functional Maturity in Small Male Snow Crabs (Chionoecetes opilio)". Canadian Journal of Fisheries and Aquatic Sciences 45, n. 12 (1 dicembre 1988): 2106–9. http://dx.doi.org/10.1139/f88-244.

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The mean size of male snow crabs (Chionoecetes opilio) in sexual pairs during the annual spring breeding migration to shallow water in Bonne Bay, Newfoundland, decreased from 118.6 mm carapace width (CW) in 1983 to 100.3 mm in 1987. This decrease is due to an increase in males <95 mm CW participating from 1.5% in 1983 to 32.3% in 1987. This change appears to have resulted from a reduced abundance of commercial size [Formula: see text] males due to a rapid development of an illegal fishery on this previously unfished population and, as a consequence, less competition between males for possession of females. The percentages of spermathecae containing new spermatophores for females paired with males <95 mm CW (67%) and those with males [Formula: see text] (79%) were not significantly different. We assumed that each female with new spermatophores had recently mated with the male with which it was paired. Observations on selected pairs in captivity showed that males <95 mm CW are capable of mating with both primiparous and muitiparous females. Our results indicate that small mature males can replace large males in breeding activity in a snow crab population. We conclude that in the male-only snow crab fishery in Atlantic Canada with a minimum legal size of 95 mm CW, population reproductive potential is maintained at a high level despite high exploitation rates on males [Formula: see text].

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17

Chun, Young-Yull, Sung-Il Lee, Sang-Chul Yoon, Hyung-Kee Cha e Jong-Bin Kim. "Molting and Growth of the Snow Crab Chionoecetes opilio in the East Sea of Korea". Korean Journal of Fisheries and Aquatic Sciences 42, n. 4 (31 agosto 2009): 380–86. http://dx.doi.org/10.5657/kfas.2009.42.4.380.

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18

Comeau, Michel, e Gérard Y. Conan. "Morphometry and Gonad Maturity of Male Snow Crab, Chionoecetes opilio". Canadian Journal of Fisheries and Aquatic Sciences 49, n. 12 (1 dicembre 1992): 2460–68. http://dx.doi.org/10.1139/f92-271.

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Abstract (sommario):

The relationship between chela height (CH) and carapace width (CW) of male snow crab, Chionoecetes opilio, goes through three allometric stages. The "immature stage" (mostly < 34 mm CW) evolves into a "juvenile stage" (34–120 mm CW) through a "juvenile molt" defining a change in allometry marked by an angular point around 34 mm CW. Fifty percent of males reach gonad maturity, defined by the presence of spermatophores inside the vasa deferentia, at an estimated size of 34 mm CW) The third allometric stage, "morphometrically mature," is separated from the juvenile stage by a "molt to morphometric maturity" at sizes ranging from 50 to 120 mm CW. Juvenile males have smaller claws than morphometrically mature males of the same size. This secondary sexual character is justified by a specific behavior of the males holding the pereipods of the female in one chela during precopulatory embrace. Male snow crab efficiently mate in nature with intermolt multiparous females only after reaching morphometric maturity. Therefore, the presence of spermatophores is not the sole determinant factor necessary for male copulation. Juvenile males larger than the minimum legal size of 95 mm CW are harvestable before, they may efficiently mate.

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19

Vilasoa-Martínez, María, Julia López-Hernández e María Asunción Lage-Yusty. "Protein and amino acid contents in the crab, Chionoecetes opilio". Food Chemistry 103, n. 4 (gennaio 2007): 1330–36. http://dx.doi.org/10.1016/j.foodchem.2006.10.045.

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20

Kang, Jung-Ha, Jung-Youn Park, Yi-Kyung Kim, Jung-Hwa Choi e Hyun-Sook Ko. "High cross-family transferability of microsatellite markers developed for the snow crab, Chionoecetes opilio (Fabricius, 1788)". Crustaceana 86, n. 11 (2013): 1354–66. http://dx.doi.org/10.1163/15685403-00003237.

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Abstract (sommario):

Of the seven species in the genusChionoecetes(family Oregoniidae), the snow crabChionoecetes opilio(Fabricius, 1788) is one of the most important commercial crustacean species along with its relative, the red snow crabC. japonicusRathbun, 1932. Despite restrictions allowing male-only capture and size limits, the capture ofC. opiliois changing and management of its natural resources is required. Microsatellite markers forC. opiliothat can be used in population and management studies were isolated using 454 pyrosequencing, a cost-effective and rapid method. Among 11 172 dinucleotide microsatellites, 64 loci containing more than nine repeats of either CA or AT were selected for primer synthesis, and 49 (76.6%) primer sets producing PCR products between 100-300 bp in length were selected as candidates. Following initial experiments with four individuals ofC. opilio, 18 polymorphic loci and three monomorphic loci were selected as the final microsatellite markers for this study. In a cross-species transfer analysis of these markers using 11 crab species belonging to the families Oregoniidae, Cheiragonidae and Portunidae in the order Brachyura, two loci, Co10-nfrdi and Co36-nfrdi, were amplified by PCR from all of the tested species, while the rest of the loci were amplified in at least one of the tested species. Among the 11 tested species,Portunus trituberculatus(Miers, 1876) of the family Portunidae showed the highest transferability. The average percentage of amplification was higher in the same genus followed by in the same family rather than in different genera or families.

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21

Rebert, April L., Gordon H. Kruse, Joel B. Webb, Sherry L. Tamone, Dion Oxman e Kevin W. McNeel. "Evaluation of a direct age estimation method for terminally molted male snow crab Chionoecetes opilio (Fabricius 1788) (Decapoda: Brachyura: Oregoniidae)". Journal of Crustacean Biology 40, n. 5 (23 luglio 2020): 549–55. http://dx.doi.org/10.1093/jcbiol/ruaa043.

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Abstract Recent research suggests that calcified eyestalks and gastric mill ossicles (stomach teeth) can be used to estimate the age of some crustacean species. Along with annual growth of the endocuticle, bipartite bands in the hard tissue are believed to reflect annual growth patterns (similar to fish scales or otoliths) that are retained through repeated molt cycles. Similar bands are observed in the zygocardiac ossicles of the gastric mill from the snow crab (Chionoecetes opilioFabricius 1788). If these bands reflect annual growth, they may be used to estimate age, which could enhance understanding growth, mortality, recruitment, and age composition and improve fishery management. While some studies show that the number of bands correlates to other estimates of age for C. opilio, little evidence suggests that bands accumulate annually as growth increments independent of molting. Male C. opilio terminally molt at maturity, after which they can survive for seven years or more. Shell condition, i.e., degree of wear and epibionts on their exoskeleton, is used here and by other carcinologists as a proxy for age subsequent to the terminal molt. We estimated band counts and endocuticle thickness from thin sections of the zygocardiac ossicle of terminally molted male C. opilio across a range of shell conditions from a wild, fished stock. We found no differences in band counts (P = 0.41) or endocuticle thickness (P = 0.13) across varying shell conditions and size. These results do not support the hypothesis that band counts can be used to estimate the age of this species after the terminal molt.

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22

Brattey, John, Robert W. Elner, Leslie S. Uhazy e Anne E. Bagnall. "Metazoan parasites and commensals of five crab (Brachyura) species from eastern Canada". Canadian Journal of Zoology 63, n. 9 (1 settembre 1985): 2224–29. http://dx.doi.org/10.1139/z85-329.

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Seven hundred and twenty-one brachyuran crabs (Cancer borealis, Cancer irroratus, Carcinus maenas, Chionoecetes opilio, Geryon quinquedens) were collected in waters off eastern Canada during 1980–1982 and the prevalences of metazoan parasites and commensals determined. The survey revealed larval stages of three species of parasite, Microphallus sp. (Platyhelminthes: Digenea), Polymorphus sp. (Acanthocephala: Palaeacanthocephala), Nectonema sp. (Nematomorpha: Nectonematoidea), and five species of ectocommensal, Eteonopsis geryonicola (Annelida: Polychaeta), Johanssonia arctica (Annelida: Hirudinea), Ectocotyla paguri and Ectocotyla multitesticulata (Platyhelminthes: Turbellaria), and Carcinonemertes sp. (Nemertea: Monostilifera). New host records are reported for E. geryonicola in the branchial chambers of C. opilio and for Carcinonemertes sp. on egg masses of ovigerous G. quinquedens. All of the larval parasites, except Nectonema sp., and all of the ectocommensals, except J. arctica and Ectocotyla spp., are previously unreported from crabs off eastern Canada. Our findings suggest that the crab species studied do not support a diverse community of metazoan parasites or commensals.

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23

Savoie, Luc, Michel Biron e Gilles Miron. "Fouling Community of the Snow Crab Chionoecetes Opilio in Atlantic Canada". Journal of Crustacean Biology 27, n. 1 (1 gennaio 2007): 30–36. http://dx.doi.org/10.1651/s-2722.1.

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24

Martinez, Maria Vilasoa, Ana Rodriguez-Bernaldo de Quiros, Julia Lopez Hernandez e M. Asucion Lage Yusty. "Fatty Acid Profile and Total Lipid Content of Chionoecetes opilio Shells". Open Food Science Journal 3, n. 1 (23 ottobre 2009): 93–97. http://dx.doi.org/10.2174/1874256400903010093.

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25

Park, Chang-Doo, Heui-Chun An, Sam-Kwang Cho, Bong-Seong Bae, Hae-Hoon Park, Jae-Hyun Bae e Hyun-Young Kim. "Size selectivity of gill net for female snow crab, Chionoecetes opilio". Bulletin of the Korean society of Fisheries Technology 45, n. 2 (31 maggio 2009): 122–27. http://dx.doi.org/10.3796/ksft.2009.45.2.122.

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26

AN, H. S., J. H. JEONG e J. Y. PARK. "New microsatellite markers for the snow crab Chionoecetes opilio (Brachyura: Majidae)". Molecular Ecology Notes 7, n. 1 (9 novembre 2006): 86–88. http://dx.doi.org/10.1111/j.1471-8286.2006.01538.x.

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27

Puebla, O., E. Parent e J. M. Sevigny. "New microsatellite markers for the snow crab Chionoecetes opilio (Brachyura: Majidae)". Molecular Ecology Notes 3, n. 4 (ottobre 2003): 644–46. http://dx.doi.org/10.1046/j.1471-8286.2003.00542.x.

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28

Manu-Tawiah, W., e N. F. Haard. "Recovery of Carotenoprotein From the Exoskeleton of Snow Crab Chionocetes opilio". Canadian Institute of Food Science and Technology Journal 20, n. 1 (febbraio 1987): 31–33. http://dx.doi.org/10.1016/s0315-5463(87)70666-x.

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29

Rozwałka, Robert, e Wojciech Staręga. "The invasive harvestman Opilio canestrinii (Thorell, 1876) (Opiliones: Phalangiidae) in Poland". Fragmenta Faunistica 55, n. 2 (2012): 161–68. http://dx.doi.org/10.3161/00159301ff2012.55.2.161.

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30

Tremblay, Ariane, Ronan Corcuff, Charles Goulet, Samuel B. Godefroy, Alain Doyen e Lucie Beaulieu. "Valorization of snow crab ( Chionoecetes opilio ) cooking effluents for food applications". Journal of the Science of Food and Agriculture 100, n. 1 (9 novembre 2019): 384–93. http://dx.doi.org/10.1002/jsfa.10066.

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31

Conan, Gérard Y., e Michel Comeau. "Functional Maturity and Terminal Molt of Male Snow Crab, Chionoecetes opilio". Canadian Journal of Fisheries and Aquatic Sciences 43, n. 9 (1 settembre 1986): 1710–19. http://dx.doi.org/10.1139/f86-214.

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Abstract (sommario):

Bivariate and multivariate analyses of allometric relationships between chela size and carapace size of snow crab, Chionoecetes opilio, show that mature males are recognizable by morphometry. The most simple procedure is to plot logarithms of chela height (Ch) against logarithms of carapace width (Lc). Data from mature and immature males fit into two distinct ellipses with parallel major axes. The discriminant function Y = −0.78893 loge. Lc + 0.614488 logeCh + 1.76051 will assign individuals to the correct groups in 99% of cases (for mature males: Y > 0). Spermatophores are present in the vasa deferentia of all males larger than 60 mm Lc. The molt to morphometric maturity occurs later at Lc sizes ranging from 60 to 120 mm; it is identified as final. Only morphometrically mature males larger than 96 mm Lc have been observed to mate efficiently with multiparous females in intermolt and be functionally mature. In the catch, as many as 40% of males larger than the minimal legal size of 95 mm can be immature.

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32

Nguyen, Khanh Q., Paul D. Winger, Corey Morris e Scott M. Grant. "Artificial lights improve the catchability of snow crab ( Chionoecetes opilio ) traps". Aquaculture and Fisheries 2, n. 3 (maggio 2017): 124–33. http://dx.doi.org/10.1016/j.aaf.2017.05.001.

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33

Becker, Annette, e Werner Peters. "Fine structure of the midgut gland of Phalangium opilio (Chelicerata, Phalangida)". Zoomorphology 105, n. 5 (ottobre 1985): 317–25. http://dx.doi.org/10.1007/bf00312063.

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34

S.V., Bakanev, e Pavlov V.A. "PROSPECTS OF SNOW CRAB (CHIONOECETES OPILIO) FISHERIES IN THE KARA SEA". Problems of fisheries 21, n. 4 (2020): 478–87. http://dx.doi.org/10.36038/0234-2774-2020-21-4-478-487.

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35

Chun, Young-Yull, Byeong-Gyu Hong, Kang-Seok Hwang, Hyung-Kee Cha, Sung-Il Lee e Seon-Jae Hwang. "Maturation of Reproductive Organs and Spawning of the Snow Crab Chionoecetes opilio from the East Sea of Korea". Journal of the Korean Fisheries Society 41, n. 2 (30 aprile 2008): 119–24. http://dx.doi.org/10.5657/kfas.2008.41.2.119.

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36

Slizkin, A. G., e V. N. Koblikov. "PRACTICE OF RESEARCH AND FORECASTING OF BIOMASS OF SNOW CRAB CHIONOECETES OPILIO OF THE SOUTHERN PART OF PRIMORYE SUBZONE". Problems of fisheries 20, n. 1 (2019): 59–72. http://dx.doi.org/10.36038/0234-2774-2019-20-1-59-72.

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37

Comeau, Michel, Marc Lanteigne e Roland Cormier. "SERUM PROTEIN CONCENTRATION AND SOMATIC INDEX IN RELATION TO MORPHOMETRIC MATURITY FOR MALE SNOW CRAB, CHIONOECETES OPILIO (O. FABRICIUS, 1788), IN THE BAIE DES CHALEURS, CANADA (DECAPODA, BRACHYURA)". Crustaceana 72, n. 5 (1999): 497–506. http://dx.doi.org/10.1163/156854099503546.

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Abstract (sommario):

AbstractThe serum protein concentrations of juvenile and mature male snow crabs, Chionoecetes opilio, were measured using a refractometer. The somatic indices of juvenile and mature male snow crab were calculated using the weight of the dry flesh of the chelae versus its wet weight. Results indicate that juvenile male snow crab have significantly higher serum protein concentrations and significantly lower somatic indices than their mature counterparts. These observations are attributed to basic physiological differences that could be explained by a terminal moult. Les concentrations en proteines seriques de males juveniles et a maturite du crabe des neiges Chionoecetes opilio ont ete mesurees au moyen d'un refractometre. Les indices somatiques de ces individus ont ete calcules en utilisant le rapport entre le poids sec et le poids humide de la chair. Les resultats indiquent que les individus males juveniles ont des concentrations en proteines seriques significativement plus elevees et des indices somatiques significativement plus bas que les individus males matures. Ces observations sont attribuees a des differences physiologiques de base qui peuvent etre expliquees par une mue terminale.

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38

Reppond, Kermit, Louis Rugolo e Alexandra C. M. de Oliveira. "Change in Biochemical Composition During Development of Snow Crab, Chionoecetes Opilio, Embryos". Journal of Crustacean Biology 28, n. 3 (1 gennaio 2008): 519–27. http://dx.doi.org/10.1651/07-2862r1.1.

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39

Yigit, Nazife, Abdullah Bayram, Ilkay Corak e Tarik Danisman. "External Morphology of the Male Harvestman Phalangium opilio (Arachnida: Opiliones)". Annals of the Entomological Society of America 100, n. 4 (1 luglio 2007): 574–81. http://dx.doi.org/10.1603/0013-8746(2007)100[574:emotmh]2.0.co;2.

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40

Taylor, D. M., G. W. Marshall e P. G. O'Keefe. "Shell Hardening in Snow Crabs Chionoecetes opilio Tagged in Soft-Shelled Condition". North American Journal of Fisheries Management 9, n. 4 (settembre 1989): 504–8. http://dx.doi.org/10.1577/1548-8675(1989)009<0504:shiscc>2.3.co;2.

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41

Choi, Jung Hwa, e David A. Somerton. "Efficiency of the Korean Bottom Survey Trawl for Snow Crab Chionoecetes opilio". Fisheries and aquatic sciences 15, n. 4 (30 dicembre 2012): 337–43. http://dx.doi.org/10.5657/fas.2012.0337.

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42

Tremblay, M. J. "Snow Crab (Chionoecetes opilio) Distribution Limits and AbundanceTrends on the Scotian Shelf". Journal of Northwest Atlantic Fishery Science 21 (aprile 1997): 7–22. http://dx.doi.org/10.2960/j.v21.a1.

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43

Hoenig, John M., Earl G. Dawe e Paul G. O'Keefe. "Molt Indicators and Growth per Molt for Male Snow Crabs (Chionoecetes opilio)". Journal of Crustacean Biology 14, n. 2 (maggio 1994): 273. http://dx.doi.org/10.2307/1548907.

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44

Taylor, D. M. "A Bilateral Gynandromorph of the Snow Crab, Chionoecetes Opilio, From Newfoundland, Canada". Crustaceana 51, n. 3 (1986): 309–12. http://dx.doi.org/10.1163/156854086x00502.

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45

Botta, J. R., B. E. Squires e S. L. Keats. "Handling Procedures and the Quality of Fresh Raw Snow Crab (Chionoecetes opilio)". Canadian Institute of Food Science and Technology Journal 22, n. 5 (dicembre 1989): 470–74. http://dx.doi.org/10.1016/s0315-5463(89)70599-x.

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46

Urban, J. Daniel. "Discard mortality rates in the Bering Sea snow crab, Chionoecetes opilio, fishery". ICES Journal of Marine Science 72, n. 5 (24 gennaio 2015): 1525–29. http://dx.doi.org/10.1093/icesjms/fsv004.

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Abstract (sommario):

Abstract Fish and invertebrates that are unintentionally captured during commercial fishing operations and then released back into the ocean suffer mortality at unknown rates, introducing uncertainty into the fishery management process. Attempts have been made to quantify discard mortality rates using reflex action mortality predictors or RAMP which use the presence or absence of a suite of reflexes to predict discard mortality. This method was applied to snow crab, Chionoecetes opilio, during the 2010–2012 fisheries in the Bering Sea. Discard mortality in the fishery is currently assumed to be 50% in stock assessment models, but that rate is not based on empirical data and is widely recognized to be in need of refinement. Over 19 000 crab were evaluated using the RAMP method. The estimated discard mortality rate was 4.5% (s.d. = 0.812), significantly below the rate used in stock assessment models. Predicted discard mortality rates from the 2010 to 2012 study were strongly correlated with the air temperature at the St Paul Island airport in the Pribilof Islands. Using this relationship, the discard mortality rate from 1991 to 2011 was estimated at 4.8% (s.d. = 1.08).

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47

Gaudet, P. H., R. J. Cawthorn, J. F. Morado, D. Wadowska, G. M. Wright e S. J. Greenwood. "Ultrastructure of trichocysts in Hematodinium spp. infecting Atlantic snow crab, Chionoecetes opilio". Journal of Invertebrate Pathology 121 (settembre 2014): 14–20. http://dx.doi.org/10.1016/j.jip.2014.06.006.

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48

Wheeler, Kersten, Jeffrey D. Shields e David M. Taylor. "Pathology of Hematodinium infections in snow crabs (Chionoecetes opilio) from Newfoundland, Canada". Journal of Invertebrate Pathology 95, n. 2 (giugno 2007): 93–100. http://dx.doi.org/10.1016/j.jip.2007.01.002.

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49

Narevich, Irina S., e Lidia T. Kovekovdova. "Microelements (As, Cd, Pb, Fe, Cu, Zn, Se, Hg) in commercial crustaceans in the Japan Sea". Izvestiya TINRO 189, n. 2 (30 giugno 2017): 147–55. http://dx.doi.org/10.26428/1606-9919-2017-189-147-155.

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Abstract (sommario):

Concentrations of As, Cd, Pb, Hg, Se, Fe, Cu, and Zn in tissues of the commercial crabs and shrimps Chionoecetes opilio, Paralithodes camtschaticus, Pandalus borealis, Pandalus hypsinotus , and Sclerocrangon salebrosa from Primorye waters are determined. The samples were collected by research vessels of Pacific Fish. Res. Center (TINRO) in 2012-2016. Content of metals and arsenic in the soft tissues (from claws and phalanxes of crabs and abdomen of shrimps) was determined by atomic absorption analysis (fiery and flameless methods), using Shimadzu AA-6800 spectrophotometer and mercury analyzer DMA-80 Milestone. As, Cd and Pb concentrations were measured by electrothermal method, with graphite cuvette as an atomizer; Fe, Cu and Zn concentrations were measured in the acetylene/air flame, with single-slot burner as an atomizer and background correction by a deuterium lamp. The standard solutions of the metals were used for calibration. Generally, the microelement composition in soft tissues of all shrimp and crab species is similar. For all species, concentrations of the elements in the soft tissues decrease in the order: Zn > Fe > As > Cu > Se > Cd ~ Pb ~ Hg. All samples are distinguished by heightened concentration of Cu. The following ranges of the toxic metals concentration are observed (mg per kg of wet weight): Pandalus borealis As - 1.6-8.5; Cd - 0.03-0.15; Pb - 0.01-0.02; Pandalus hipsinotus As - 2.78-14.6; Cd - 0.01-0.13; Pb - 0.00-0.01; Sclerocrangon salebrosa As - 5.4-17.3; Cd - 0.01-0.04; Pb - 0.01-0.03; Chionoecetes opilio As - 9.4-14.0; Cd - 0.01-0.05; Pb - 0.01-0.05; Paralithodes camtschaticus As - 3.0-8.8; Cd - 0.0008-0.10; Pb - 0.001-0.009. Cases of exceeding the maximum permissible level of As are detected for all species: in 68.0 % of samples for Paralithodes camtschaticus , in 35.0 % of samples for Sclerocrangon salebrosa , in 33.3 % of samples for Panadalus hipsinotus , in 17.5 % of samples for Panadalis borealis , and in 17.0 % of samples for Chionoecetes opilio .

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50

Taylor, David M., Denis H. Lynn e Scott G. Gransden. "Vasichona opiliophila n.sp., an ectosymbiotic ciliate (Chonotrichia; Exogemmida) on the maxillae of the snow crab, Chionoecetes opilio". Canadian Journal of Zoology 73, n. 1 (1 gennaio 1995): 166–72. http://dx.doi.org/10.1139/z95-019.

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Abstract (sommario):

Vasichona opiliophila n.sp. is described from the basal endites of the maxillae of the snow crab, Chionoecetes opilio. This is the first report of these chonotrich ciliates from the Northwestern Atlantic. The genus Vasichona Jankowski, 1972 is redefined and the genus Cryptochona Jankowski, 1973 is considered to be a junior synonym of Vasichona because the relative size of the oral flap is not a stable character.

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