Dublin Core
Title
Current Advances and Challenges in Fisheries and Aquaculture Science: Feature Papers for the New Journey of Fishes
Subject
temperature, skeletal development, ossification, morphological alterations, Fishh, Fisheries, Aquaculture
Description
In ectotherm species, environmental temperature plays a key role in development, growth,
and survival. Thus, determining how temperature affects fish populations is of utmost importance to
accurately predict the risk of climate change over fisheries and aquaculture, critical to warrant nutrition
and food security in the coming years. Here, the potential effects of abnormal thermal regimes
(24, 28 and 32 ◦C; TR24, TR28, and TR32, respectively) exclusively applied during embryogenesis
in tropical gar (Atractosteus tropicus) has been explored to decipher the potential consequences on
hatching and growth from fertilization to 16 days post-fertilization (dpf), while effects on skeletal
development and body morphology were explored at fertilization and 16 dpf. Egg incubation at
higher temperatures induced an early hatching and mouth opening. A higher hatching rate was
obtained in eggs incubated at 28 ◦C when compared to those at 24 ◦C. No differences were found in
fish survival at 16 dpf, with values ranging from 84.89 to 88.86%, but increased wet body weight and
standard length were found in larvae from TR24 and TR32 groups. Thermal regime during embryogenesis
also altered the rate at which the skeletal development occurs. Larvae from the TR32 group
showed an advanced skeletal development, with a higher development of cartilaginous structures at
hatching but reduced at 16 dpf when compared with the TR24 and TR28 groups. Furthermore, this
advanced skeletal development seemed to determine the fish body morphology. Based on biometric
measures, a principal component analysis showed how along development, larvae from each thermal
regime were clustered together, but with each population remaining clearly separated from each other.
The current study shows how changes in temperature may induce craniofacial and morphological
alterations in fish during early stages and contribute to understanding the possible effects of global
warming in early development of fish and its ecological implications.
and survival. Thus, determining how temperature affects fish populations is of utmost importance to
accurately predict the risk of climate change over fisheries and aquaculture, critical to warrant nutrition
and food security in the coming years. Here, the potential effects of abnormal thermal regimes
(24, 28 and 32 ◦C; TR24, TR28, and TR32, respectively) exclusively applied during embryogenesis
in tropical gar (Atractosteus tropicus) has been explored to decipher the potential consequences on
hatching and growth from fertilization to 16 days post-fertilization (dpf), while effects on skeletal
development and body morphology were explored at fertilization and 16 dpf. Egg incubation at
higher temperatures induced an early hatching and mouth opening. A higher hatching rate was
obtained in eggs incubated at 28 ◦C when compared to those at 24 ◦C. No differences were found in
fish survival at 16 dpf, with values ranging from 84.89 to 88.86%, but increased wet body weight and
standard length were found in larvae from TR24 and TR32 groups. Thermal regime during embryogenesis
also altered the rate at which the skeletal development occurs. Larvae from the TR32 group
showed an advanced skeletal development, with a higher development of cartilaginous structures at
hatching but reduced at 16 dpf when compared with the TR24 and TR28 groups. Furthermore, this
advanced skeletal development seemed to determine the fish body morphology. Based on biometric
measures, a principal component analysis showed how along development, larvae from each thermal
regime were clustered together, but with each population remaining clearly separated from each other.
The current study shows how changes in temperature may induce craniofacial and morphological
alterations in fish during early stages and contribute to understanding the possible effects of global
warming in early development of fish and its ecological implications.
Creator
Editor :
Maria Angeles Esteban
Bernardo Baldisserotto
Eric Hallerman
Maria Angeles Esteban
Bernardo Baldisserotto
Eric Hallerman
Source
https://directory.doabooks.org/handle/20.500.12854/84471
Publisher
MDPI - Multidisciplinary Digital Publishing Institute
Date
2022
Contributor
Jadik wijayanto
Rights
https://creativecommons.org/licenses/by/4.0/
Relation
www.mdpi.com/books
Format
PDF
Language
English
Type
Textbooks
Identifier
ISBN
9783036540757, 9783036540764
9783036540757, 9783036540764
Coverage
Basel, Switzerland