Comparative morphology and morphometry of the micropyle of two Korean rice-fishes, Oryzias latipes and Oryzias sinensis (Pisces, Adrianichthyidae)

Kim, Hyun T.; Park, Jong Y.

doi:10.25225/jvb.20130

Cited by 4 publications

(4 citation statements)

References 18 publications

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“…The SEM image of isolated ova from spawning S. plagiostomus ovaries for the first time has revealed the distinct location and structure of micropyle (diameter around 12.92 μm ± 3.38). This structure, however, was consistent with that reported in medaka (18.5-22.4 μm for O. latipes and 10.0-12.5 μm for Oryzias sinensis) (Kim & Park, 2021).…”

Section: Regressing/spent/post-spawning Stagesupporting

confidence: 91%

“…The micropyle is a key aperture located on the surface of fish egg‐chorion and acts as the entry site of functional spermatozoa during fertilization (Kim & Park, 2021). It develops during late vitellogenic stage I and stage III before hatching (Kim & Park, 2021). In typical cyprinid fishes ( e.g ., rosy barb, Barbus conchonius ) it consists of 7–10 grooves/ridges, which drain directly into a funnel‐shaped vestibule (Amanze & Iyengar, 1990).…”

Section: Discussionmentioning

confidence: 99%

“…The micropyle is a key aperture located on the surface of fish egg-chorion and acts as the entry site of functional spermatozoa during fertilization (Kim & Park, 2021). It develops during late vitellogenic stage I and stage III before hatching (Kim & Park, 2021).…”

Section: Regressing/spent/post-spawning Stagementioning

confidence: 99%

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A study on the seasonal cyclicity of ovarian development in adult Himalayan snow trout, Schizothorax plagiostomus

Sharma

Purohit

Bhatt

et al. 2023

Journal of Fish Biology

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Schizothorax plagiostomus, commonly known as snow trout, is a popular food fish found in parts of Central Asia and the Indo‐Himalayan region. Despite such a broad range of distribution and potential financial value, it is a highly neglected cold‐water ichthyofauna. Furthermore, an alarming decline in Schizothoracine population has been reported in the recent past due to climate change and uncontrolled anthropogenic interference. In this study, the seasonal variations in ovarian architecture and development were examined in adult S. plagiostomus from Garhwal Himalayan region, Uttarakhand, India. Ovarian‐somatic index ranged from 16.86 ± 0.29 to 0.31 ± 0.56, with a maximal value in September and a minimal value in April. Ovarian histology revealed the abundance of primary growth oocytes in resting and preparatory stages; primary/secondary vitellogenic oocytes with numerous cortical alveoli were predominant in the developing stage of pre‐spawning ovaries; secondary/tertiary vitellogenic oocytes were conspicuous in actively spawning ovaries; and atretic follicles/oocytes were discernible during the regressing stage of spent ovaries. Scanning electron microscopy of mature ova (mean diameter 2.003 ± 0.01 mm) prominently showed the structure micropyle (mean diameter 12.93 ± 3.38 μm). Fecundity analyses suggested that September was the principal breeding season, whereas residual spawning occurred with fresh rain in late winter during February–March. Collectively, this is the first comprehensive qualitative and quantitative report of the seasonal variations in the ovarian development and function for S. plagiostomus. These data may provide valuable information towards the captive breeding programme as well as conservation and management for Schizothoracine fishes in normal and altered climatic conditions.

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Section: Regressing/spent/post-spawning Stagesupporting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

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A study on the seasonal cyclicity of ovarian development in adult Himalayan snow trout, Schizothorax plagiostomus

Sharma

Purohit

Bhatt

et al. 2023

Journal of Fish Biology

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“…In this study, Chinese medaka (Oryzias sinensis), a close relative species of Japanese medaka, was selected and used as the test animal. This fish species has the features of small size, short generation time, secondary sexual appearance, and frequent spawning and is distributed in most parts of East Asia and most economically developed areas of China, , which make it convenient to be used in a laboratory study and field investigation. Here, we performed a 105-day exposure experiment of BHPF on Chinese medaka in a laboratory to study the reproductive and developmental effects of BHPF and investigated the BHPF levels in surface water of Beijing (China), as well as their potential effects on wild Chinese medaka in the actual environments.…”

Section: Introductionmentioning

confidence: 99%

Reproductive Toxicity and Teratogenicity of Fluorene-9-bisphenol on Chinese Medaka (Oryzias sinensis): A Study from Laboratory to Field

Fan

Guo

Jia

et al. 2022

Environ. Sci. Technol.

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Fluorene-9-bisphenol (BHPF), a bisphenol A (BPA) substitute, has been increasingly used as a material in syntheses of polymers that are widely used in road markings, artificial tracks, coating floors, building paints, etc., increasing the likelihood of BHPF contamination in the aquatic environment due to its release from the products. However, to date, it is unknown whether it may have actual impacts on fish in real environments. In this study, a 105-day exposure experiment of BHPF at various concentrations (0.01, 0.1, 1, and 10 μg/ L) on Chinese medaka (Oryzias sinensis) was performed under laboratory conditions and found decreased fecundity, such as lower egg qualities and quantities, retarded oogenesis, and atretic follicles in the fish and deformed eyes and bodies in its F1 generation. Toxicotranscriptome analyses showed that estrogen-responsive genes were significantly suppressed by BHPF, indicating that antagonist properties of BHPF on estrogen receptors might be causes for the decreased fecundity. Field investigations (Beijing) demonstrated that BHPF was detectable in 60% surface waters, with a mean concentration of 10.49 ± 6.33 ng/L, by gas chromatography−mass spectrometry, and similar effects in wild Chinese medaka were also observed, some of which the parameters were found to be obviously correlated with the BHPF levels in corresponding waters.

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Chorion in fish: Synthesis, functions and factors associated with its malformations

Pérez-Atehortúa

Hernández

Dantagnan

et al. 2023

Aquaculture Reports

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Comparative morphology and morphometry of the micropyle of two Korean rice-fishes, Oryzias latipes and Oryzias sinensis (Pisces, Adrianichthyidae)

Cited by 4 publications

References 18 publications

A study on the seasonal cyclicity of ovarian development in adult Himalayan snow trout, Schizothorax plagiostomus

A study on the seasonal cyclicity of ovarian development in adult Himalayan snow trout, Schizothorax plagiostomus

Reproductive Toxicity and Teratogenicity of Fluorene-9-bisphenol on Chinese Medaka (Oryzias sinensis): A Study from Laboratory to Field

Chorion in fish: Synthesis, functions and factors associated with its malformations

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