Effect of low pH on early life stages of the decapod crustacean, Dungeness crab (Cancer magister)
Thesis (Master's)--University of Washington, 2015 Dungeness crab (Cancer magister) eggs and larvae were exposed to laboratorycontrolled, low-pH seawater in an effort to assess current and predicted-future impacts of Ocean Acidification (OA) on hatching success, survival and growth. Treatment le...
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ftunivwashington:oai:digital.lib.washington.edu:1773/33170 2023-05-15T17:50:48+02:00 Effect of low pH on early life stages of the decapod crustacean, Dungeness crab (Cancer magister) Miller, Jason James Friedman, Carolyn 2015 application/pdf http://hdl.handle.net/1773/33170 en_US eng crabpHALK_DIC.csv; data; Chemistry file. CumHatchbyTX.csv; data; Cumulative egg hatching file. eggs.csv; data; Egg data file. IDCZS_2013.csv; data; Zoeal survival file. Dry_weights_3.csv; data; Dry weights of zoeae. Stages_Final_dayII.csv; data; Zoeal stages file. Miller_washington_0250O_14170.pdf http://hdl.handle.net/1773/33170 Copyright is held by the individual authors. crustacean decapod Ocean acidification pH survival Fisheries and aquatic sciences Environmental science Conservation biology fisheries Thesis 2015 ftunivwashington 2023-03-12T18:54:41Z Thesis (Master's)--University of Washington, 2015 Dungeness crab (Cancer magister) eggs and larvae were exposed to laboratorycontrolled, low-pH seawater in an effort to assess current and predicted-future impacts of Ocean Acidification (OA) on hatching success, survival and growth. Treatment levels of pH ~8.0, ~7.5 and ~7.1 represented the wide range of pH-levels relevant to current-open-ocean, currentupwelled and future-upwelled conditions associated with C. magister habitat in the northeast Pacific Ocean. For this study, pH ~8.0 represented the "control". C. magister eggs were exposed to treatment levels for 34 days. There was no effect of treatment on probability of hatching, however there was a delay in hatch-timing for eggs in pH 7.1. Newly hatched C. magister larvae were exposed to treatment levels for 45 days with 57.9%, 13.5%, and 21.1% surviving in pH 8.0, 7.5, and 7.1 respectively. Larvae in the low-pH treatments were 2.5-3 times less likely to survive than in the control. There was no effect of treatment on larval size at a particular larval stage, however, larvae in the low-pH treatments progressed through larval stages at a slower rate than the control. While some larvae survived the low-pH conditions to the end of the experiment, the lowest survivorship occurred in seawater reflective of pH-levels that can currently be experienced in estuaries and areas of upwelling. The results of this study indicate that low-pH seawater caused by OA can slow down progression through early life stages and that long-duration exposure can result in mortality. Thesis Ocean acidification University of Washington, Seattle: ResearchWorks Pacific |
institution |
Open Polar |
collection |
University of Washington, Seattle: ResearchWorks |
op_collection_id |
ftunivwashington |
language |
English |
topic |
crustacean decapod Ocean acidification pH survival Fisheries and aquatic sciences Environmental science Conservation biology fisheries |
spellingShingle |
crustacean decapod Ocean acidification pH survival Fisheries and aquatic sciences Environmental science Conservation biology fisheries Miller, Jason James Effect of low pH on early life stages of the decapod crustacean, Dungeness crab (Cancer magister) |
topic_facet |
crustacean decapod Ocean acidification pH survival Fisheries and aquatic sciences Environmental science Conservation biology fisheries |
description |
Thesis (Master's)--University of Washington, 2015 Dungeness crab (Cancer magister) eggs and larvae were exposed to laboratorycontrolled, low-pH seawater in an effort to assess current and predicted-future impacts of Ocean Acidification (OA) on hatching success, survival and growth. Treatment levels of pH ~8.0, ~7.5 and ~7.1 represented the wide range of pH-levels relevant to current-open-ocean, currentupwelled and future-upwelled conditions associated with C. magister habitat in the northeast Pacific Ocean. For this study, pH ~8.0 represented the "control". C. magister eggs were exposed to treatment levels for 34 days. There was no effect of treatment on probability of hatching, however there was a delay in hatch-timing for eggs in pH 7.1. Newly hatched C. magister larvae were exposed to treatment levels for 45 days with 57.9%, 13.5%, and 21.1% surviving in pH 8.0, 7.5, and 7.1 respectively. Larvae in the low-pH treatments were 2.5-3 times less likely to survive than in the control. There was no effect of treatment on larval size at a particular larval stage, however, larvae in the low-pH treatments progressed through larval stages at a slower rate than the control. While some larvae survived the low-pH conditions to the end of the experiment, the lowest survivorship occurred in seawater reflective of pH-levels that can currently be experienced in estuaries and areas of upwelling. The results of this study indicate that low-pH seawater caused by OA can slow down progression through early life stages and that long-duration exposure can result in mortality. |
author2 |
Friedman, Carolyn |
format |
Thesis |
author |
Miller, Jason James |
author_facet |
Miller, Jason James |
author_sort |
Miller, Jason James |
title |
Effect of low pH on early life stages of the decapod crustacean, Dungeness crab (Cancer magister) |
title_short |
Effect of low pH on early life stages of the decapod crustacean, Dungeness crab (Cancer magister) |
title_full |
Effect of low pH on early life stages of the decapod crustacean, Dungeness crab (Cancer magister) |
title_fullStr |
Effect of low pH on early life stages of the decapod crustacean, Dungeness crab (Cancer magister) |
title_full_unstemmed |
Effect of low pH on early life stages of the decapod crustacean, Dungeness crab (Cancer magister) |
title_sort |
effect of low ph on early life stages of the decapod crustacean, dungeness crab (cancer magister) |
publishDate |
2015 |
url |
http://hdl.handle.net/1773/33170 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
crabpHALK_DIC.csv; data; Chemistry file. CumHatchbyTX.csv; data; Cumulative egg hatching file. eggs.csv; data; Egg data file. IDCZS_2013.csv; data; Zoeal survival file. Dry_weights_3.csv; data; Dry weights of zoeae. Stages_Final_dayII.csv; data; Zoeal stages file. Miller_washington_0250O_14170.pdf http://hdl.handle.net/1773/33170 |
op_rights |
Copyright is held by the individual authors. |
_version_ |
1766157702559432704 |