• Korean Journal of Fisheries and Aquatic Sciences
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• v.45 no.6
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• pp.716-722
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• 2012

The larval occurrence of the red snow crab Chionoecetes japonicus was investigated near Dokdo in the East Sea of Korea, and the larval timing of the genus Chionoecetes in world oceans was reviewed. C. japonicus larvae were collected seasonally at 12 stations in February, May, August, and November in 2011. A Bongo net with a 303 mesh was deployed with a double oblique tow. Larvae appeared from February to August, but no larvae were found in November. Zoea I occurred at nine stations with a few zoea II in February, and were found until August. The larval densities in February were high near the northern. In May, megalopa were found at eight stations with a few zoea II. No larvae were caught in November. The larval abundance in the research area peaked in February. Overall, the larval duration of the genus Chionoecetes in the world's oceans persisted for a long time, and Chionoecetes larvae occurred during the warm season in each area. The cold temperature at the sea bottom, where gravid females are found, may prolong larval production along the distribution range of the genus Chionoecetes.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.36 no.1
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• pp.62-64
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• 2003

Recently, relatively large amount of a new species of crab belonging to genus Chionoecetes that has intermediate characteristics between red-tanner crab (Chionoecetes japonicus) and queen crab (C. opilio) was caught the East Sea of Korea. The new species of crab was tentatively named Neodo-Daege. Amino acid and proximate compositions of the edible meat of red-tanner crab and Neodo-Daege were determine. The proximate composition of the meats of Neodo-Daege were $79.2{\%}$ in moisture, $17.4{\%}$ in protein, $0.6{\%}$ in lipid, and $1.5{\%}$ in ash. Neodo-Daege was higher in protein and lipid contents, and lower in moisture and ash contents than those of red-tanner crab. The total amino acid contents in the meat of Neodo-Daege were higher than those of red-tanner crab, but the profile of amino acids was similar to one another. Among amino acids, glutamic acid, arginine, aspartic acid, lysine and glycine were major components of the crabs.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.43 no.1
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• pp.28-37
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• 2007

In order to develop the biodegradable monofilament gill net for the protection of marine ecosystem and reduction of ghost fishing, enpol monofilament gill net was made for Chionoecetes opilio using polybutylene succinate as a biodegradable chip. Catching efficiency on 2 type monofilament gill net, PA and Enpol, were carried out using 2 commercial fishing boats around the fishing ground of Wang-dol rock from January 2004 to May 2006. Enpol monofilament gill net spun polybutylene succinate as a biodegradable chip was appeared high practicality for Chionoecetes opilio gill net. Target fishing ratio were 98% and 98.3% for the PA and enpol monfilament gill net, respectively. In addition, CPUE ratio of female and male(CL < 90mm) to Chionoecetes opilio caught in the enpol gill net were 25.3-40.3%, 14.0-22.1% less than PA gill net, respectively. However, CPUE ratio of male(CL > 90mm) to Chionoecetes opilio caught in the enpol gill net were 2.5-11.3% more than PA gill net. There was no difference in CPUE of female and male to Chionoecetes opilio caught using 2 gill nets as a result of the significance level of 5% by T-test.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.49 no.1
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• pp.1-6
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• 2016

This study investigated the physicochemical and sensory characteristics of fish paste containing red snow crab Chionoecetes japonicus leg-meat powder (RMP) in 0, 3, 6, 9, and 12% concentrations. The moisture contents of fish paste with RMP ranged from 56.7 to 60.2% and the pH ranged from 7.0 to 7.7. The L values decreased as the RMP concentration increased, and a and b increased. The folding test for all of the fish paste samples scored AA, which indicates good flexibility. The hardness, springiness, gumminess, and cohesiveness increased with the RMP concentration. In the sensory evaluation, the fish paste prepared with 6% RMP was the most preferred. These results suggest that RMP can be added to fish paste to achieve high quality.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.49 no.3
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• pp.277-284
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• 2016

In this study, we investigated the quality characteristics of madeleine combined with lyophilized red snow crab Chionoecetes japonicus leg-meat powder (CM). The madeleine was prepared by the addition of wheat flour containing 0, 1, 5, 10, 15 and 20% concentrations of CM. Moisture content, pH, and baking loss rate did not differ significantly among groups. Light coloration significantly decreased in a dose-dependent manner, while red and yellow coloration significantly increased. Hardness, chewiness and gumminess significantly increased in a dose-dependent manner, while cohesiveness, springiness and adhesiveness did not differ from CON (madeleine containing 0% CM). In terms of sensory characteristics, appearance and color did not differ compared to CON, while taste, flavor and overall preference increased in a dose-dependent manner, with CM10 having the highest score among the groups. The present study assesses the potential of this improved formula as a convenience food.

• Animal cells and systems
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• v.13 no.1
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• pp.59-69
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• 2009

This paper documents the defining morphological characteristics of the larval stages of Chionoecetes tanneri Rathbun, 1893, the grooved Tanner crab, from specimens reared in the laboratory. Chionoecetes tanneri larval stages include two zoeae and one megalopa. The first zoea is characterized by: six setae on the posterior margin of the carapace; postero-lateral spines on abdominal somites 3 and 4, extending beyond the posterior margin of adjacent somites and bearing 9-10 spinnules; 12 plumose setae and one stout distal plumose seta present on the margin of the scaphognathite of the maxilla; and one fused lateral spine and one articulated dorso-medial spine on each fork of the telson. The second zoea is characterized by: 9 setae on the postero-lateral margin of the carapace; a serrated mandible molar; a mandibular palp bud; 25-26 plumose setae on the margin of the scaphognathite of the maxilla; pereiopods with well-developed gills and buds; and four pairs of stout setae on the posterior margin of the telson. For the megalopal stage, the distinguishing characteristics include: a rostral spine equal in length to the supraorbital spine; six setae on the exopod of the uropod; and a single spine on the ischium of the second pereiopod. This study allows C. tanneri larvae to be distinguished from the larvae of known sympatric congeners. This information provides a basic taxonomic tool for researchers in fisheries management and zooplankton ecology who are addressing issues related to trophic interactions, metapopulation dynamics and ecosystem impacts in the evolving marine resource management strategies in the North Pacific, and those related to Chionoecetes species in particular.

• The Journal of Fisheries Business Administration
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• v.51 no.4
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• pp.19-45
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• 2020

This study is to evaluate economic effect of the creation project of snow crab, Chionoecetes opilio, spawning and habitat ground in Uljin and Youngdeok county. The main results of this study are summarized as follows: first, 14,400 million won was invested in the creation project cost of Chionoecetes opilio spawning and habitat ground of Uljin and Youngdeok County from 2015 to 2020. Second, the creation project of Chionoecetes opilio spawning and habitat ground directly provides fishing benefits, festival benefits, research and development benefits and employment benefits. Third, on the basis of above benefits, the creation project of Chionoecetes opilio spawning and habitat ground has net present value of 29,900.53 million won, internal rate of return 16.9%, and benefit-cost of 2.91 under a 4.5% social discount rate. Also, the creation project creates 195 jobs. This indicates that the creation project of Chionoecetes opilio spawning and habitat ground not only contributes to the increase in the income of coastal fishery and fishing villages but also to the job making. The result of this study provides useful information to policy makers or project managers as it shows that the project to create spawning and habitat ground should be carried out in consideration of the resource and biological characteristics of individual fish and that economic assessment logic should also be developed based on this. Also, it proves that the project to create a snow crab spawning and habitat ground is a national and local infrastructure project that increases the actual fishing income in the region. At the same time, it maintains the reproducibility function of most fish species, along with enhancing the people's benefits such as fishing village tourism and marine product consumption. Moreover, it provides useful information on budgeting for the continuous development of snow crab spawning and habitat ground in the mid to long-term.

• Fisheries and Aquatic Sciences
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• v.15 no.4
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• pp.337-343
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• 2012

The Korean bottom trawl survey was conducted using a trawl designed by the National Fisheries Research and Development Institute (NFRDI). The capture efficiency and size selectivity of this trawl for snow crab Chionoecetes opilio was investigated by experimental tows. An auxiliary sampling net (underbag) was attached beneath the trawl net to capture crabs escaping under the trawl footrope. Experimental tows were made by the same vessel speed (3.4 knots) as in the bottom trawl survey, but toing time was shortened from the standard 30 min to 10 min to reduce possible trawl distortion due to the high catch rate of mud and debris in the underbag. In averaged over 17 tows conducted between 110-383 m depth, trawl efficiency of both males and females combined increased from about 10% at 20 mm (carapace width) to about 70% at 100 mm, with a width of 50% capture equal to 78 mm.

• Journal of Aquaculture
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• v.14 no.1
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• pp.51-56
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• 2001

At 5$^{\circ}C$ incubation of the brooded eggs of the snow crab, Chionoecetes opilio lasted for 297 days; freshly hatched prezoea molted to become the first zoea in one hour. Length (from the tip of the rostral spines to the tip of the dorsal spines) of the first and second zoeae measured 4.8 and 6.4mm, respectively. Experimental rearing of the larvae at 5, 10, 15 and 2$0^{\circ}C$ indicated that the upper limit of thermal tolerance is 15$^{\circ}C$, as all the reared larvae succumbed at 2$0^{\circ}C$. Intermolt period from the first the first zoea to the second was 57, 32 and 23 days at 5, 10 and 15$^{\circ}C$, respectively and that of the second zoea was 52, 29 and 90 days, respectively. Largest number of larvae survived at 1$0^{\circ}C$.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2001.05a
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• pp.415-416
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• 2001

지금까지 동해에 서식하는 대게류근 대게(Chionoecetes opilio, 일명 영덕대게)와 붉은대게(Chionoecetes japonicus, 일명 홍게)의 두 종류가 있었다. 대게는 200∼800m수심의 사질이 많은 곳에서 주로 서식하면서 자망에 의해 어획되고 있으며, 붉은대게는 500∼2,300m의 동해 심층에 분포, 서식하면서 근해통말어업에 의해 어획되고 있다. 특히, 대게는 동해 주요 합가류 중의 하나로서 그 맛이 특이하게 좋아 고가로 판매되면서 동해 어민들의 소득향상에 크게 기여하고 있는 종이다. (중략)