Responses of congeneric freshwater fish, Squalius carolitertii and Sequalius torgalensis, to future climate change

Bibliographic Details
Main Author: Jesus, Tiago Filipe Salgueiro de, 1987-
Publication Date: 2017
Language: eng
Source: Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
Download full: http://hdl.handle.net/10451/34057
Summary: Tese de doutoramento, Biologia (Biologia Evolutiva), Universidade de Lisboa, Faculdade de Ciências, 2017
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spelling Responses of congeneric freshwater fish, Squalius carolitertii and Sequalius torgalensis, to future climate changeTeses de doutoramento - 2017Domínio/Área Científica::Ciências Naturais::Ciências BiológicasTese de doutoramento, Biologia (Biologia Evolutiva), Universidade de Lisboa, Faculdade de Ciências, 2017Climate changes are exposing freshwater sh to higher water temperatures and acidi cation. Once studies evaluating freshwater sh responses to these challenges are scarce, the main objective of this thesis is to comprehend how two Iberian freshwater sh species cope with future climate change. Squalius carolitertii and Squalius torgalensis, which are endemic of two distinct regions of the Iberian Peninsula, live in different environmental conditions. Herein, their thermal stress responses were rstly accessed by the expression of two genes involved in the heat shock response (HSR) (hsp70 and hsc70 ). Afterwards, we conducted a transcriptome-wide study of sh exposed to acute thermal stress. Results suggest that S. torgalensis handled with stressing thermal conditions differently than S. carolitertii. While S. torgalensis redirects resources from cell division and growth processes to the HSR, the induction of genes involved in the HSR was lower in S. carolitertii, which presented no re-adjustment of other energy consumption mechanisms. The long-term responses on gene expression and physiology of these two species to future warming (plus 3 °C) and acidi cation ( pH=-0.4) were evaluated herein, alongside with protein modeling of fourteen target genes. Findings suggest that S. torgalensis is better suited to cope with the projected climate change conditions, once it presents fewer changes in gene expression and in the physiological markers involved in the HSR and energy metabolism than S. carolitertii. Also, the HSP90 and GBP1 proteins of S. torgalensis have higher thermostability, suggesting that they function in a wider range of temperatures. Instead, S. carolitertii presents many changes in gene expression, including in genes involved in the thermal stress response as well as in energy metabolism, and a decrease in the aerobic metabolism coupled with an increase in the anaerobic metabolism. Remarkably, the projected climatic conditions elicit severe changes in the circadian (cry1aa and per1a) and immune (gpb1 ) related genes, as well as an increase in HSP70 protein content, which may hinder the survival of both species. This work provide the rst assessment of the ability of Iberian freshwater sh to deal with future climate change and shall be considered for conservation actions, particularly for the critically endangered S. torgalensis.Coelho, Maria Manuela, 1954-Val, Vera Maria Fonseca de Almeida eRepositório da Universidade de LisboaJesus, Tiago Filipe Salgueiro de, 1987-2018-06-28T16:25:55Z201720172017-01-01T00:00:00Zdoctoral thesisinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10451/34057TID:101406312enginfo:eu-repo/semantics/openAccessreponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiainstacron:RCAAP2025-03-17T13:55:43Zoai:repositorio.ulisboa.pt:10451/34057Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireinfo@rcaap.ptopendoar:https://opendoar.ac.uk/repository/71602025-05-29T02:58:06.303133Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiafalse
dc.title.none.fl_str_mv Responses of congeneric freshwater fish, Squalius carolitertii and Sequalius torgalensis, to future climate change
title Responses of congeneric freshwater fish, Squalius carolitertii and Sequalius torgalensis, to future climate change
spellingShingle Responses of congeneric freshwater fish, Squalius carolitertii and Sequalius torgalensis, to future climate change
Jesus, Tiago Filipe Salgueiro de, 1987-
Teses de doutoramento - 2017
Domínio/Área Científica::Ciências Naturais::Ciências Biológicas
title_short Responses of congeneric freshwater fish, Squalius carolitertii and Sequalius torgalensis, to future climate change
title_full Responses of congeneric freshwater fish, Squalius carolitertii and Sequalius torgalensis, to future climate change
title_fullStr Responses of congeneric freshwater fish, Squalius carolitertii and Sequalius torgalensis, to future climate change
title_full_unstemmed Responses of congeneric freshwater fish, Squalius carolitertii and Sequalius torgalensis, to future climate change
title_sort Responses of congeneric freshwater fish, Squalius carolitertii and Sequalius torgalensis, to future climate change
author Jesus, Tiago Filipe Salgueiro de, 1987-
author_facet Jesus, Tiago Filipe Salgueiro de, 1987-
author_role author
dc.contributor.none.fl_str_mv Coelho, Maria Manuela, 1954-
Val, Vera Maria Fonseca de Almeida e
Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Jesus, Tiago Filipe Salgueiro de, 1987-
dc.subject.por.fl_str_mv Teses de doutoramento - 2017
Domínio/Área Científica::Ciências Naturais::Ciências Biológicas
topic Teses de doutoramento - 2017
Domínio/Área Científica::Ciências Naturais::Ciências Biológicas
description Tese de doutoramento, Biologia (Biologia Evolutiva), Universidade de Lisboa, Faculdade de Ciências, 2017
publishDate 2017
dc.date.none.fl_str_mv 2017
2017
2017-01-01T00:00:00Z
2018-06-28T16:25:55Z
dc.type.driver.fl_str_mv doctoral thesis
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10451/34057
TID:101406312
url http://hdl.handle.net/10451/34057
identifier_str_mv TID:101406312
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
instacron:RCAAP
instname_str FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
instacron_str RCAAP
institution RCAAP
reponame_str Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
collection Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
repository.name.fl_str_mv Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
repository.mail.fl_str_mv info@rcaap.pt
_version_ 1833601548553289728

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