Biological Field Techniques for Chionoecetes Crabs

Jadamec, Luke S.; Donaldson, W. E.; Cullenberg, Paula

doi:10.4027/bftcc.1999

Cited by 73 publications

(41 citation statements)

References 12 publications

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“…ed at the time of collection. Shell condition, a subjective index of epibionts and wear on the exoskeleton, was noted because it has proven useful for evaluating differences in the recency of molting in crab species (Jadamec et al, 1999;Donaldson and Byersdorfer, 2002). Crab gastric mills and shrimp eyestalks were …”

Section: Histological Examination Of the Cuticlementioning

confidence: 99%

Preliminary assessment of a direct age determination method for 3 commercially important crustaceans from Alaska

Kilada¹,

Webb²,

McNeel³

et al. 2016

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Abstract-Management of commercially important crab and shrimp species in Alaska has been hindered by the inability to directly determine the age of individual animals. We investigated the applicability of a recently developed method of age determination to red king crab (Paralithodes camtschaticus), southern Tanner crab (Chionoecetes bairdi), and spot shrimp (Pandalus platyceros) from Alaska. The cuticle structures of the mesocardiac ossicles of crabs and the eyestalks of spot shrimp were visualized with histological staining to identify the endocuticle, where growth bands have been observed in other crustaceans. For all species, paired light and dark bands were observed in longitudinal, thin sections of these structures in the majority of specimens examined. The proximal portion of the mesocardiac ossicle, where growth bands were observed, was absent in the foregut exuviae of red king and southern Tanner crabs that molted in captivity. If validated, counts of growth bands hold promise as a reliable measure for determining age of these species.

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Section: Histological Examination Of the Cuticlementioning

confidence: 99%

Preliminary assessment of a direct age determination method for 3 commercially important crustaceans from Alaska

Kilada¹,

Webb²,

McNeel³

et al. 2016

View full text Add to dashboard Cite

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“…Crabs were measured (nearest mm in carapace width for Tanner crabs and carapace length for red king crabs) with vernier calipers. Sexual maturity of female Tanner crabs was assessed by the relative size of the abdominal flap (Jadamec et al 1999) and the presence of eggs. Sexual maturity for male Tanner crabs is not easy to classify in the field.…”

Section: Field Methods Distribution and Abundancementioning

confidence: 99%

“…dance. To minimize tag loss that might occur because of molting, we tagged new-shell male Tanner crabs (Jadamec et al 1999) greater than 125 mm; these crabs were predicted to have a molt interval greater than 2 yr (Paul & Paul 1995). Similarly, we only tagged recently molted red king crabs with a carapace length larger than 140 mm.…”

Section: Field Methods Distribution and Abundancementioning

confidence: 99%

Spatial patterns and movements of red king and Tanner crabs: implications for the design of marine protected areas

Taggart¹,

Mondragon²,

Andrews³

et al. 2008

Mar. Ecol. Prog. Ser.

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“…In 2012, carapace length and width were measured to establish a conversion factor between carapace length and width. In 2013, only carapace width was measured to ensure standardization with literature data where carapace width is commonly reported (Jadamec et al, 1999). For each data point, carapace width was divided by the corresponding carapace length.…”

Section: Epibenthic Samplingmentioning

confidence: 99%

Size-frequency distribution, growth, and mortality of snow crab (Chionoecetes opilio) and arctic lyre crab (Hyas coarctatus) in the chukchi sea from 2009 to 2013

Groß

Konar

Brey

et al. 2017

Deep Sea Research Part II: Topical Studies in Oceanography

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Size-frequency distribution, growth, and mortality of snow crab (Chionoecetes opilio) and arctic lyre crab (Hyas coarctatus) A B S T R A C TThe snow crab Chionoecetes opilio and Arctic lyre crab Hyas coarctatus are prominent members of the Chukchi Sea epifaunal community. A better understanding of their life history will aid in determining their role in this ecosystem in light of the changing climate and resource development. In this study, the size frequency distribution, growth, and mortality of these two crab species was examined in 2009, 2010, 2012, and 2013 to determine temporal and spatial patterns within the eastern Chukchi Sea, and to identify potential environmental drivers of the observed patterns. Temporally, the mean size of both sexes of C. opilio and H. coarctatus decreased significantly from 2009 to 2013, with the number of rare maximum sized organisms decreasing significantly to near absence in the latter two study years. Spatially, the mean size of male and female crabs of both species showed a latitudinal trend, decreasing from south to north in the investigation area. Growth of both sexes of C. opilio and H. coarctatus was linear over the sampled size range, and mortality was highest in the latter two study years. Life history features of both species related to different environmental parameters in different years, ranging from temperature, the sediment carbon to nitrogen ratio of the organic content, and sediment grain size distribution. Likely explanations for the observed temporal and spatial variability are ontogenetic migrations of mature crabs to warmer areas possibly due to cooler water temperatures in the latter two study years, or interannual fluctuations, which have been reported for C. opilio populations in other areas where successful waves of recruitment were estimated to occur in eight year intervals. Further research is suggested to determine if the spatial and temporal patterns found in this study are part of the natural variability in this system or if they are an indication of long-term trends. IntroductionCrustaceans are one of the most abundant epibenthic organisms in the Chukchi Sea (Bluhm et al., 2009;Feder et al., 2005). As highly mobile organisms, larger crustaceans contribute to the redistribution and remineralisation of organic carbon that falls to the sea floor (Lovrich et al., 1995;Piepenburg et al., 1997). They are one of the main predators in the benthic community, and they also contribute to total benthic energy turnover by providing an important prey base for higher trophic levels such as demersal fish and benthic feeding marine mammals (Frost and Lowry, 1983;Jewett and Feder, 1981).In the Chukchi Sea, the snow crab Chionoecetes opilio (O. Fabricius, 1788) can be one of the most abundant benthic taxa, with the Arctic lyre crab Hyas coarctatus Leach, 1816 also being fairly abundant (Bluhm et al., 2009;Ravelo et al., 2014). Both species have a boreal-arctic range distribution around North America (Alvsvåg et al., 2009;Bluhm et al., 2009;Bryant, 1991;Comeau et...

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Biological Field Techniques for Chionoecetes Crabs

Cited by 73 publications

References 12 publications

Preliminary assessment of a direct age determination method for 3 commercially important crustaceans from Alaska

Preliminary assessment of a direct age determination method for 3 commercially important crustaceans from Alaska

Spatial patterns and movements of red king and Tanner crabs: implications for the design of marine protected areas

Size-frequency distribution, growth, and mortality of snow crab (Chionoecetes opilio) and arctic lyre crab (Hyas coarctatus) in the chukchi sea from 2009 to 2013

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