skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: It’s a catfish! Novel approaches are needed to study the effects of rapid decompression on benthic species

Abstract

Barotrauma due to rapid decompression has been recorded as the most common injury among fish captured in the tailrace of hydropower dams in Brazil, with catfishes representing the majority of them. Nevertheless, studies investigating barotrauma on catfish are scarce, with the majority determining dose-response curves and thresholds of pressure changes for nektonic species as salmonids. Experiments conducted with Pimelodus pictus showed that the current hypo-hyperbaric chambers used to study barotrauma in nektonic species have limitations when applied to benthic groups. The negative buoyancy showed by the catfish prevent the definition of the acclimation pressure of the fish prior to exposure to decompression and, therefore, hinder calculation of the ratio of pressure change (RPC). RPC has been considered the main factor explaining the likelihood of barotrauma on fish. Since its calculation is restricted for benthic species, new approaches deemed to be needed to complement barotrauma studies with this group. We aimed to discuss the limitations observed for studies with benthonic species and present potential methods to overcome them. The diversification of approaches for barotrauma studies with benthonic species is critical to provide information for the development of mitigation and new turbine designs that would improve protection of this group.

Authors:
 [1];  [2];  [2];  [2];  [2]
  1. BATTELLE (PACIFIC NW LAB)
  2. Universidade Federal de Sao Joao del-Rei
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1575425
Report Number(s):
PNNL-SA-136216
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Marine and Freshwater Research
Additional Journal Information:
Journal Volume: 69; Journal Issue: 12
Country of Publication:
United States
Language:
English

Citation Formats

Do Vale Beirao, Bernardo, Silva, Luiz G., Falcao, Ricardo, Castro, Andrey, and Dias, Edson. It’s a catfish! Novel approaches are needed to study the effects of rapid decompression on benthic species. United States: N. p., 2018. Web. doi:10.1071/MF18267.
Do Vale Beirao, Bernardo, Silva, Luiz G., Falcao, Ricardo, Castro, Andrey, & Dias, Edson. It’s a catfish! Novel approaches are needed to study the effects of rapid decompression on benthic species. United States. doi:10.1071/MF18267.
Do Vale Beirao, Bernardo, Silva, Luiz G., Falcao, Ricardo, Castro, Andrey, and Dias, Edson. Thu . "It’s a catfish! Novel approaches are needed to study the effects of rapid decompression on benthic species". United States. doi:10.1071/MF18267.
@article{osti_1575425,
title = {It’s a catfish! Novel approaches are needed to study the effects of rapid decompression on benthic species},
author = {Do Vale Beirao, Bernardo and Silva, Luiz G. and Falcao, Ricardo and Castro, Andrey and Dias, Edson},
abstractNote = {Barotrauma due to rapid decompression has been recorded as the most common injury among fish captured in the tailrace of hydropower dams in Brazil, with catfishes representing the majority of them. Nevertheless, studies investigating barotrauma on catfish are scarce, with the majority determining dose-response curves and thresholds of pressure changes for nektonic species as salmonids. Experiments conducted with Pimelodus pictus showed that the current hypo-hyperbaric chambers used to study barotrauma in nektonic species have limitations when applied to benthic groups. The negative buoyancy showed by the catfish prevent the definition of the acclimation pressure of the fish prior to exposure to decompression and, therefore, hinder calculation of the ratio of pressure change (RPC). RPC has been considered the main factor explaining the likelihood of barotrauma on fish. Since its calculation is restricted for benthic species, new approaches deemed to be needed to complement barotrauma studies with this group. We aimed to discuss the limitations observed for studies with benthonic species and present potential methods to overcome them. The diversification of approaches for barotrauma studies with benthonic species is critical to provide information for the development of mitigation and new turbine designs that would improve protection of this group.},
doi = {10.1071/MF18267},
journal = {Marine and Freshwater Research},
number = 12,
volume = 69,
place = {United States},
year = {2018},
month = {11}
}