Life-history traits in the southernmost landlocked population of the fish Galaxias maculatus

Rojo, Javier Hernán; Boy, Claudia Clementina

doi:10.1007/s00300-022-03064-x

Cited by 3 publications

(1 citation statement)

References 52 publications

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“…The intraspecific variation can be attributed to differences in developmental stage, food quality (Arnott et al 2023, Auer et al 2020, environmental conditions (e.g., temperature), or demands for storage in the face of variability in food supply accompanying seasonal effects (Arnott et al 2023, Kulma et al 2020. Others also attribute the intraspecific variation to sex, stage, size or other similar life-history characteristic, habitat (excluding food) and feeding history (Rojo et al 2022). However, no study has ever attempted to compare the importance of the physiological requirement and the environmental changes in determining the pattern of C, N and P stoichiometry of an organism.…”

Section: Introductionmentioning

confidence: 99%

Ecological stoichiometric pattern and biochemical composition analysis of Coilia species

Duan

Han²,

Lai³

et al. 2023

Preprint

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Ecological stoichiometry is a scientific discipline that studies the balance of energy and multiple chemical elements in biological systems, and it has been widely applied in fish research. However, there are few studies on fishes with different reproductive modes, such as Coilia, which experience habitat shifts during their life history and serve as important ecological links between marine and freshwater ecosystems. To address this gap, we compared the ecological chemical elements of four Coilia species (C. nasus, C. brachygnathus, C. mystus and C. grayii) to understand their organismal stoichiometry pattern in terms of changes in C, N, and P. The result shows, 1) The C content of Coilia had a wide range and was higher than the general fish, ranging from 40% -70%, while N% and P% were 4%-12% and 0.5%-3%, respectively. 2) Diadromous populations showed wider variations of elemental stoichiometry during migration than non-migration populations, with a higher coefficient of variation of elements and C:N:P than other Coilia species. In particular, the C content of diadromous Coilia nasus was the highest (>60% in the East China Sea) when the fish was ready for spawning migration, while N and P were opposites. Diadromous fish might have evolved a mechanism to store as much lipid as possible in their bodies to meet the energy demand during their long migration journey; 3) There were certain similarities between the biochemical composition and elemental changes. The trends of total fat and C content curves were consistent, with anadromous Coilia nasus storing a large amount of fat before migration to meet their energy needs during long-distance migration. The variation trends of crude protein and N content curve were similar to some degree, with crude protein and total fat having opposite trends, meaning that increased with a decrease in total fat, and vice versa

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Section: Introductionmentioning

confidence: 99%

Ecological stoichiometric pattern and biochemical composition analysis of Coilia species

Duan

Han²,

Lai³

et al. 2023

Preprint

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Reproductive traits in the southernmost landlocked population of the fish Galaxias maculatus

Boy,

Rojo,

Fraysse

et al. 2023

Hydrobiologia

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The Reproductive Biology of Puye (Galaxias maculatus) under Experimental Culture

Sandoval-Vargas,

Pérez-Atehortúa,

Figueroa Villalobos

et al. 2024

Animals

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This study determines the reproductive patterns of puye (Galaxias maculatus) under culture conditions. A population of 567 wild fish was caught in the Cautín River, Chile, and held in captivity for four years. Mortality, sex ratio, gonadosomatic index (GSI), sexual maturity stages, spawning period, type and frequency of spawning, and fecundity were measured. The fish grew throughout the experimental period, with the fastest rate during the first half of the first year of life. The highest mortality occurred during the first three months of the experiment and during the spawning season. The sex ratio was almost 1:1 (female:male). First sexual maturity was reached at one year of age, with an average weight of 0.85 ± 0.01 g, total length of 4.85 ± 0.16 cm, and condition factor 0.0074. The highest GSI in both females (12.14 ± 0.74) and males (17.7 ± 2.70) was recorded in August. Nevertheless, the females spawned 3 to 10 times between September and February, with the highest reproductive peak between September and October. The number of embryos per female per day varied from 1 to 429, while the total number of embryos per female during the entire season evaluated varied from 163 to 1044. There was a high correlation (r = 0.82) between absolute fecundity and body weight. Although further studies are needed in this field, these results are basic for establishing future reproductive programs in captivity as a strategy for sustainable fisheries and aquaculture management.

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Life-history traits in the southernmost landlocked population of the fish Galaxias maculatus

Cited by 3 publications

References 52 publications

Ecological stoichiometric pattern and biochemical composition analysis of Coilia species

Ecological stoichiometric pattern and biochemical composition analysis of Coilia species

Reproductive traits in the southernmost landlocked population of the fish Galaxias maculatus

The Reproductive Biology of Puye (Galaxias maculatus) under Experimental Culture

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