Pathological examination of fish exposed to explosive based instantaneous pressure change
Oil and gas exploration in Northern Canada uses explosive-based seismic techniques to locate hydrocarbon reserves beneath waterbodies not frozen to the bottom. The use of explosives in, or near, waterbodies has the potential to harm fishes, primarily through instantaneous pressure changes (IPCs) gen...
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ftunivmanitoba:oai:mspace.lib.umanitoba.ca:1993/4056 2023-06-18T03:40:14+02:00 Pathological examination of fish exposed to explosive based instantaneous pressure change Godard, Danielle R Palace, Vince (Biological Science) Hanson, Mark (Environment and Geography) Baydack, Rick (Environment and Geography) Smits, Judit (University of Calgary) 2010-08-23T14:37:39Z 2924314 bytes application/pdf http://hdl.handle.net/1993/4056 eng eng Godard DR, Peters L, Evans R, Wautier K, Cott PA., Hanna B. and Palace V. 2009. Development of histopathology tools to assess instantaneous pressure change-induced effects in rainbow trout (Oncorhynchus mykiss) early life stages. Environmental Studies Research Funds Report. 164: iv + 88 p. http://hdl.handle.net/1993/4056 open access pathology explosive seismic fish master thesis 2010 ftunivmanitoba 2023-06-04T17:36:55Z Oil and gas exploration in Northern Canada uses explosive-based seismic techniques to locate hydrocarbon reserves beneath waterbodies not frozen to the bottom. The use of explosives in, or near, waterbodies has the potential to harm fishes, primarily through instantaneous pressure changes (IPCs) generated from the detonations. These IPCs can damage soft tissues through the rapid compression and expansion of the swimbladder as the pressure wave passes. In Canada, a document entitled Guidelines for the Use of Explosives In or Near Canadian Fisheries Waters recommends that peak pressures not exceed 100 kPa for the protection of fish, however damage has been reported below this level. To simulate seismic exploration and examine potential pathological changes surrounding the current Guideline, fish across different developmental stages and with varying degrees of swimbladder presence were exposed to a variety of explosive based IPC levels in field experiments. Early life stages of rainbow trout (Oncorhynchus mykiss) including eyed eggs, sac fry, and juveniles were caged and exposed to discrete detonations from 0 to 280 kPa in the Mackenzie Delta, NWT. These fish were subsequently examined for both gross pathological and histological changes to cranial structures as well as swimbladder, kidney, liver and gill tissue. Results showed changes in both the area and circumference of the cranial region of eyed eggs, as well as swimbladder, ocular and kidney damage in juveniles. Additionally, caged adult swimbladder bearing lake trout (Salvelinus namaycush) and non-swimbladder bearing slimy sculpin (Cottus cognatus) were exposed to explosive based IPCs ranging in peak pressure from 0 to 127 kPa at the Experimental Lakes Area, Ontario. Fish were later examined grossly and blood, liver, kidney, intestine, and spleen were examined to determine the presence of any traumatic based pathological changes. Results indicated the occurrence of swimbladder hemorrhage in lake trout exposed to IPCs near the current Guideline level. ... Master Thesis Cottus cognatus Mackenzie Delta Slimy sculpin MSpace at the University of Manitoba Canada Mackenzie Delta ENVELOPE(-136.672,-136.672,68.833,68.833) |
institution |
Open Polar |
collection |
MSpace at the University of Manitoba |
op_collection_id |
ftunivmanitoba |
language |
English |
topic |
pathology explosive seismic fish |
spellingShingle |
pathology explosive seismic fish Godard, Danielle R Pathological examination of fish exposed to explosive based instantaneous pressure change |
topic_facet |
pathology explosive seismic fish |
description |
Oil and gas exploration in Northern Canada uses explosive-based seismic techniques to locate hydrocarbon reserves beneath waterbodies not frozen to the bottom. The use of explosives in, or near, waterbodies has the potential to harm fishes, primarily through instantaneous pressure changes (IPCs) generated from the detonations. These IPCs can damage soft tissues through the rapid compression and expansion of the swimbladder as the pressure wave passes. In Canada, a document entitled Guidelines for the Use of Explosives In or Near Canadian Fisheries Waters recommends that peak pressures not exceed 100 kPa for the protection of fish, however damage has been reported below this level. To simulate seismic exploration and examine potential pathological changes surrounding the current Guideline, fish across different developmental stages and with varying degrees of swimbladder presence were exposed to a variety of explosive based IPC levels in field experiments. Early life stages of rainbow trout (Oncorhynchus mykiss) including eyed eggs, sac fry, and juveniles were caged and exposed to discrete detonations from 0 to 280 kPa in the Mackenzie Delta, NWT. These fish were subsequently examined for both gross pathological and histological changes to cranial structures as well as swimbladder, kidney, liver and gill tissue. Results showed changes in both the area and circumference of the cranial region of eyed eggs, as well as swimbladder, ocular and kidney damage in juveniles. Additionally, caged adult swimbladder bearing lake trout (Salvelinus namaycush) and non-swimbladder bearing slimy sculpin (Cottus cognatus) were exposed to explosive based IPCs ranging in peak pressure from 0 to 127 kPa at the Experimental Lakes Area, Ontario. Fish were later examined grossly and blood, liver, kidney, intestine, and spleen were examined to determine the presence of any traumatic based pathological changes. Results indicated the occurrence of swimbladder hemorrhage in lake trout exposed to IPCs near the current Guideline level. ... |
author2 |
Palace, Vince (Biological Science) Hanson, Mark (Environment and Geography) Baydack, Rick (Environment and Geography) Smits, Judit (University of Calgary) |
format |
Master Thesis |
author |
Godard, Danielle R |
author_facet |
Godard, Danielle R |
author_sort |
Godard, Danielle R |
title |
Pathological examination of fish exposed to explosive based instantaneous pressure change |
title_short |
Pathological examination of fish exposed to explosive based instantaneous pressure change |
title_full |
Pathological examination of fish exposed to explosive based instantaneous pressure change |
title_fullStr |
Pathological examination of fish exposed to explosive based instantaneous pressure change |
title_full_unstemmed |
Pathological examination of fish exposed to explosive based instantaneous pressure change |
title_sort |
pathological examination of fish exposed to explosive based instantaneous pressure change |
publishDate |
2010 |
url |
http://hdl.handle.net/1993/4056 |
long_lat |
ENVELOPE(-136.672,-136.672,68.833,68.833) |
geographic |
Canada Mackenzie Delta |
geographic_facet |
Canada Mackenzie Delta |
genre |
Cottus cognatus Mackenzie Delta Slimy sculpin |
genre_facet |
Cottus cognatus Mackenzie Delta Slimy sculpin |
op_relation |
Godard DR, Peters L, Evans R, Wautier K, Cott PA., Hanna B. and Palace V. 2009. Development of histopathology tools to assess instantaneous pressure change-induced effects in rainbow trout (Oncorhynchus mykiss) early life stages. Environmental Studies Research Funds Report. 164: iv + 88 p. http://hdl.handle.net/1993/4056 |
op_rights |
open access |
_version_ |
1769005208846729216 |