Spatiotemporal trends in Tanner crab (Chionoecetes bairdi) size at maturity

Author(s):  
R.S. Otto ◽  
D. Pengilly

Crustaceana ◽  
1981 ◽  
Vol 40 (3) ◽  
pp. 286-302 ◽  
Author(s):  
J.R. Hilsinger ◽  
William E. Donaldson ◽  
R.T. Cooney


2015 ◽  
Vol 138 ◽  
pp. 475-485 ◽  
Author(s):  
Jonathan I. Richar ◽  
Gordon H. Kruse ◽  
Enrique Curchitser ◽  
Albert J. Hermann




1981 ◽  
Vol 38 (2) ◽  
pp. 163-174 ◽  
Author(s):  
David A. Somerton

Minimum size limits for the commercial harvest of tanner crab (Chionoecetes bairdi and C. opilio) are based on the sizes of sexual maturity. Establishing such size limits in the eastern Bering Sea is complicated by a large regional variation in the size of maturity. A computer technique was developed which partitioned the eastern Bering Sea into subareas that were relatively homogeneous with respect to the size of maturity. The best partitioning for C. bairdi was a separation of the eastern Bering Sea into two subareas along 167°15′N longitude. No acceptable partitioning could be found for C. opilio. The size of 50% maturity for male C. bairdi was estimated to be 108.9 mm carapace width in the western subarea and 117.0 mm in the eastern subarea. The size of maturity upon which the current minimum size for C. bairdi is based is nearly the same as the size estimated for the western subarea but significantly less than the size estimated for the eastern subarea.Key words: crabs, size of maturity, Chionoecetes bairdi, Chionoecetes opilio, tanner crab, eastern Bering Sea



2021 ◽  
Author(s):  
Grace Crandall ◽  
Pamela C Jensen ◽  
Sam White ◽  
Steven Roberts

Tanner crab (Chionoecetes bairdi) are an economically important species that is threatened by ocean warming and Bitter Crab Disease, which is caused by an endoparasitic dinoflagellate, Hematodinium. Little is known about disease transmission or its link to host mortality, or how ocean warming will affect pathogenicity or host susceptibility. To provide a transcriptomic resource for the Tanner crab we generated a suite of RNA-seq libraries encompassing pooled hemolymph samples from crab displaying differing infection status and maintained at different temperatures (ambient (7.5˚C), elevated (10˚C), or decreased (4˚C)). After assembling a transcriptome and performing a multifactor differential gene expression analysis, we found genes influenced by temperature in relation to infection, and detected some of those genes over time at the individual level using RNAseq data from one crab. Biological processes associated with those genes include lipid storage, transcription, response to oxidative stress, cell adhesion, and morphogenesis. Alteration in lipid storage and transcription provide insight into how temperature impacts energy allocation in Hematodinium infected crabs. Alteration in expression patterns in genes associated with morphogenesis could suggest hemocytes were changing morphology and/or type in response to temperature. This project provides insight into how Hematodinium infection could influence crab physiology as oceans warm.



2021 ◽  
Author(s):  
Grace Crandall ◽  
Pamela Jensen ◽  
Sam White ◽  
Steven Roberts

Abstract Tanner crab ( Chionoecetes bairdi ) are an economically important species that is threatened by ocean warming and Bitter Crab Disease, which is caused by an endoparasitic dinoflagellate, Hematodinium . Little is known about disease transmission or its link to host mortality, or how ocean warming will affect pathogenicity or host susceptibility. To betterunderstand how temperature and infection influence host physiology, we performed a temporal transcriptomic analysis on crab infected with Hematodinium and uninfected crab exposed to either ambient (7.5˚C), elevated (10˚C), or decreased (4˚C) temperature treatments. After assembling a transcriptome and performing a multifactor differential gene expression analysis, we found genes influenced by temperature in relation to infection, and detected some of those genes over time at the individual level using RNAseq data from one crab. Biological processes associated with those genes include lipid storage, transcription, response to oxidative stress, cell adhesion, and morphogenesis. Alteration in lipid storage and transcription provide insight into how temperature impacts energy allocation in Hematodinium infected crabs. Alteration in expression patterns in genes associated with morphogenesis could suggest hemocytes were changing morphology and/or type in response to temperature. This project provides insight into how Hematodinium infection could influence crab physiology as oceans warm.



2016 ◽  
Vol 25 (3) ◽  
pp. 292-305 ◽  
Author(s):  
Aimee A. Keller ◽  
John C. Buchanan ◽  
Erin Steiner ◽  
Doug Draper ◽  
Aaron Chappell ◽  
...  


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