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Impact of Climate Changes on Marine Ecology and Fishes

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Associate Professor, Department of Earth Sciences and Environment, Faculty of Science and Technology, National University of Malaysia, UKM Bangi 43600, Selangor, D.E., Malaysia
Interests: fish biology; climate change impact on fishes; sustainable aquaculture
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Dear Colleagues,

This Special Issue explores the global vulnerability of marine fauna in the face of climate change and examines the various responses and adaptations of these species. Climate change presents significant challenges to marine ecosystems, including rising temperatures, ocean acidification, changing ocean currents, and sea-level rise. These changes disrupt vital ecological processes and threaten the survival of numerous species. By investigating the vulnerability of marine fauna and understanding their responses to these environmental changes, we can develop effective strategies to mitigate the impacts and ensure the long-term resilience of marine ecosystems. This Special Issue brings together diverse research and perspectives to shed light on this urgent issue and facilitate a deeper understanding of the global implications and potential solutions for the protection and conservation of marine fauna in a changing climate.

Dr. Simon Kumar Das
Guest Editor

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Keywords

global vulnerability
marine fauna
climate change
adaptations
ocean acidification
changing ocean currents
sea-level rise
ecological processes
environmental changes
mitigate impacts
long-term resilience
marine ecosystems
diverse research
conservation

Published Papers (1 paper)

Research

18 pages, 3909 KiB

Open AccessArticle

Effects of Extreme-Ambient Temperatures in Silver Barb (Barbonymus gonionotus): Metabolic, Hemato-Biochemical Responses, Enzymatic Activity and Gill Histomorphology

Mohammad Lutfar Rahman

Md. Abdullah Al Mamun

Sarker Mohammed Ibrahim Khalil

and

Debasish Pandit

Water 2024, 16(2), 292; https://doi.org/10.3390/w16020292 - 15 Jan 2024

Viewed by 123

Abstract

A global interest in Silver Barb (Barbonymus gonionotus) cultivation has arisen because of a combination of declining wild stock and a steady increase in demand and market value. The purpose of the current investigation was to evaluate the impact of extreme water temperature changes on growth, hemato-biochemical responses, pepsin enzyme activity and gill histomorphology of B. gonionotus. Four distinct temperatures (22, 26, 30 and 34 °C) were applied in the laboratory (22, 26, 30 and 34 °C) in triplicate glass aquariums (150 L each). At 30 and 22 °C, respectively, the highest and the lowest length and weight gain, specific, daily and relative growth rates were noted. At 30 °C the lowest FCR was recorded (1.42 ± 0.04). The values related to hematology and biochemistry were found to be within normal ranges; nevertheless, there was a notable variation in the parameters when the temperature changed. Hematological results revealed that RBC, HB, PLT, HCT and PMV levels were significantly higher in groups 30 °C with respect to others. It was evident that cold and heat shock stress was present due to the decline in hematocrit levels and rise in WBC values. Regarding the biochemical responses, the level of triglycerides, cholesterol, AP, Ca⁺, HDL, and HDL/LDL ratio increased significantly higher at 30 °C. Glucose, total protein, albumin, Na⁺, K⁺, Cl⁻¹, AST, bilirubin, uric acid, and LDL levels were significantly higher at 22 °C compared to other temperatures. There was a higher pepsin activity between 26 and 30 °C while the digestive somatic index (I_DS) was disproportionate. Histological examination demonstrated the well-shaped gill tissues at 26 and 30 °C compared to distinctive pathology in other temperature treatments. As an end note, the results of the experiment indicated that B. gonionotus should be cultured at 26–30 °C to maximize the overall productivity and the health condition of this economically important fish species. Full article

(This article belongs to the Special Issue Impact of Climate Changes on Marine Ecology and Fishes)

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