Effects of company and season on blood fluke (Cardicola spp.) infection in ranched Southern Bluefin Tuna: preliminary evidence infection has a negative effect on fish growth

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Aquatic Biology

Main article text

 

Introduction

Materials and Methods

Ethics statement

Sample collection and processing

Statistics

Results

Condition index analysis

Cumulative mortality

Blood fluke prevalence

Blood fluke intensity

Discussion

Conclusions

Supplemental Information

Prevalence (P) (95% confidence interval) of Cardicola spp. infection in ranched Southern Bluefin Tuna from Praziquantel treated pontoons sampled in July 2018, 2019 and 2021.

DOI: 10.7717/peerj.15763/supp-1

Statistical differences at p ≤ 0.05 in prevalence of Cardicola spp. infection between companies for each year.

DOI: 10.7717/peerj.15763/supp-2

Statistical differences at p ≤ 0.05 in prevalence of Cardicola spp. infection between years for each company. Note: no statistical differences seen for Company C or Company F.

DOI: 10.7717/peerj.15763/supp-3

Mean intensity (I) (±SE) of Cardicola spp. infection in ranched Southern Bluefin Tuna from Praziquantel treated pontoons sampled in July 2018, 2019 and 2021. n.a – not applicable.

DOI: 10.7717/peerj.15763/supp-4

Statistical differences at p ≤ 0.05 in mean intensity of Cardicola spp. infection between companies for each year.

DOI: 10.7717/peerj.15763/supp-5

Statistical differences at p ≤ 0.05 in mean intensity of Cardicola spp. infection between years for each company.

DOI: 10.7717/peerj.15763/supp-6

SBT harvest raw data.

All blood fluke information relating to each individual fish sampled (company and year specified).

DOI: 10.7717/peerj.15763/supp-7

Additional Information and Declarations

Competing Interests

Barbara F. Nowak is an Academic Editor for PeerJ. Kirsten Rough is an employee of the Australian Southern Bluefin Tuna Industry Association.

Author Contributions

Cecilia Power conceived and designed the experiments, performed the experiments, analyzed the data, prepared figures and/or tables, authored or reviewed drafts of the article, and approved the final draft.

Melissa Carabott performed the experiments, authored or reviewed drafts of the article, and approved the final draft.

Maree Widdicombe performed the experiments, prepared figures and/or tables, authored or reviewed drafts of the article, and approved the final draft.

Lachlan Coff performed the experiments, authored or reviewed drafts of the article, and approved the final draft.

Kirsten Rough conceived and designed the experiments, authored or reviewed drafts of the article, and approved the final draft.

Barbara Nowak conceived and designed the experiments, authored or reviewed drafts of the article, and approved the final draft.

Nathan J. Bott conceived and designed the experiments, authored or reviewed drafts of the article, and approved the final draft.

Animal Ethics

The following information was supplied relating to ethical approvals (i.e., approving body and any reference numbers):

RMIT Animal Ethics Committee (22802) and UTAS Research Ethics and Integrity Unit (A0016320) provided approval for this research. All animals were harvested and euthanised as part of the commercial harvest by aquaculture company personnel in accordance with standards established by the Australian Southern Bluefin Tuna Association.

Data Availability

The following information was supplied regarding data availability:

The raw data are available in the Supplemental Files.

Funding

This work was supported by Fisheries Research and Development Corporation (FRDC2017-241 and FRDC2018-170). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

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