scholarly journals Characterization and analysis of a transcriptome from the boreal spider crab Hyas araneus

2013 ◽  
Vol 8 (4) ◽  
pp. 344-351 ◽  
Author(s):  
Lars Harms ◽  
Stephan Frickenhaus ◽  
Melanie Schiffer ◽  
Felix C. Mark ◽  
Daniela Storch ◽  
...  
Keyword(s):  
Spider Crab ◽  
Hyas Araneus

scholarly journals Impact of anthropogenic ocean acidification on thermal tolerance of the spider crab <i>Hyas araneus</i>

2009 ◽  
Vol 6 (2) ◽  
pp. 2837-2861 ◽  
Author(s):  
K. Walther ◽  
F. J. Sartoris ◽  
C. Bock ◽  
H. O. Pörtner
Keyword(s):  
Heart Rate ◽  
Thermal Tolerance ◽  
Thermal Sensitivity ◽  
Co2 Concentration ◽  
Spider Crab ◽  
Thermal Window ◽  
Co2 Levels ◽  
Hyas Araneus ◽  
Q10 Values ◽  
Critical Temperature Tc

Abstract. Future scenarios project combined developments of elevated CO2 concentrations and global warming and their impact on marine ecosystems. The synergistic impact of both factors was addressed by studying the effect of CO2 accumulation on thermal tolerance of the cold-eurythermal spider crab Hyas araneus. Animals were exposed to present day normocapnia (380 ppm CO2), CO2 levels expected towards 2100 (710 ppm) and beyond (3000 ppm). Heart rate and haemolymph PO2 (PeO2) were measured during progressive short term cooling from 10 to 0°C and during warming from 10 to 25°C. An increase of PeO2 occurred during cooling with highest values reached at 0°C under all three CO2 levels. Heart rate increased during warming until a critical temperature (Tc) was reached. The putative Tc under normocapnia was presumably >25°C, from where it fell to 23.5°C under 710 ppm and then 21.1°C under 3000 ppm. At the same time, thermal sensitivity, as seen in the Q10 values of heart rate, rose with increasing CO2 concentration in the warmth. Our results suggest a narrowing of the thermal window of Hyas araneus under moderate increases in CO2 levels by exacerbation of the heat or cold induced oxygen and capacity limitation of thermal tolerance.

scholarly journals Impacts of temperature and acidification on larval calcium incorporation of the spider crab Hyas araneus from different latitudes (54° vs. 79°N)

2011 ◽  
Vol 158 (9) ◽  
pp. 2043-2053 ◽  
Author(s):  
Kathleen Walther ◽  
Franz J. Sartoris ◽  
Hans O. Pörtner
Keyword(s):  
Spider Crab ◽  
Hyas Araneus

Food, Feeding, and Condition of Lobsters, Homarus americanus, Throughout the Seasonal Cycle in Bonavista Bay, Newfoundland

1973 ◽  
Vol 30 (12) ◽  
pp. 1905-1909 ◽  
Author(s):  
G. P. Ennis
Keyword(s):  
Physiological Condition ◽  
Feeding Activity ◽  
Homarus Americanus ◽  
Spider Crab ◽  
Sea Stars ◽  
Molting Cycle ◽  
Cancer Irroratus ◽  
Rock Crab ◽  
Hyas Araneus ◽  
Very High

The rock crab, Cancer irroratus, and spider crab, Hyas araneus, made up about 50% of the food of lobsters in Bonavista Bay, Nfld. The sea urchin, Strongylocentrotus dröbachiensis, several species of molluscs, and several species of sea stars made up 7.1, 10.9, and 10%, respectively. The remainder was mainly a variety of bottom invertebrates but fish and seaweeds were also fairly common. There was a change to a slightly more calcium-rich diet during the molting season. A rapid increase in feeding activity during the summer coincided with increasing temperatures, but despite decreasing temperatures during the fall, feeding activity remained high. The feeding index for females remained high longer into the winter than for males. Physiological condition was directly related to the molting cycle. Premolt condition was very high, postmolt very low, and recovery to the intermolt condition was attained about [Formula: see text] months after the peak molting period.

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