Current Advances and Challenges in Fisheries and Aquaculture Science: Feature Papers for the New Journey of Fishes

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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.

Creator

Editor :
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

Coverage

Basel, Switzerland

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