Sexual dimorphism in body weight, morphometric measures and indices of African Catfish (Clarias gariepinus)

Abanikannda, O.T.F.; Jimoh, Abdulazeez Abayomi; Giwa, Abdulazeez; Awosanya, Latifah Adejumoke

doi:10.1016/j.aquaculture.2018.12.040

Cited by 9 publications

(7 citation statements)

References 3 publications

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“…On the other hand, the correlations between AW/TL; AW/HL and AW/HH were higher for females, as they have a larger abdomen than males. Although not widely used for sex determination in fish, morphometric correlations can help when there are no evident sexual characteristics, being a tool that can help in further studies (Abanikannda et al, 2019; Abdu et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

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Evidence of secondary sexual dimorphism in King Tiger Plecos Hypancistrus sp, Loricariidae, of the Amazon River basin

Reis

Oliveira

Viana

et al. 2022

Aquaculture Research

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The aim of the present study was to describe the secondary sexual characteristics of adult Hypancistrus sp. A total of 120 specimens were used to evaluate the morphometric characters, to confirm the morphometric data, histological identification of sex and maturation stages of gonads was performed. The results showed that males had higher median total and standard body lengths, open fin length, right and left fin lengths, head length and width and inter‐eye width than females. However, the females showed a high median abdominal width. Both sexes presented odontodes along the body, with thick odontodes present near the interopercular region and pectoral fins. In mature males, small odontodes were present along the snout. Scanning microscopy analysis confirmed that odontodes in females had a thicker base than those in males, conferring the former with a “cone” morphology. Additionally, it was observed that males had a long and broad head with a triangular shape and "V"‐shaped genital papilla, while females had a round head and "U"‐shaped genital papilla. Thus, we conclude that Hypancistrus sp. had secondary sexual characteristics, being possible to differentiate the sex by the size of the body, abdominal width, shape of the head, size of the odontodes and distinct morphology of the ovipositor. This study will serve as a basis for the development of breeding protocols, as it aims to identify sexually mature males and females of Hypancistrus sp. for breeding in captivity.

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Section: Discussionmentioning

confidence: 99%

“…fish, morphometric correlations can help when there are no evident sexual characteristics, being a tool that can help in further studies (Abanikannda et al, 2019;Abdu et al, 2020).…”

Section: Con Clus Ionmentioning

confidence: 99%

Evidence of secondary sexual dimorphism in King Tiger Plecos Hypancistrus sp, Loricariidae, of the Amazon River basin

Reis

Oliveira

Viana

et al. 2022

Aquaculture Research

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“…Clarias batrachus , C. fuscus , C. macrocephalus , and C. gariepinus are economically important species in Asian aquaculture (Food and Agriculture Organization of the United Nations, 10.4060/ca9229en). Furthermore, C. fuscus and C. gariepinus are sexually dimorphic, with differences in growth rates between males and females [ 7 , 8 ]. Therefore, it is necessary to assemble chromosome-level genomes of these species to provide a basis for understanding the evolution of sex chromosomes of catfishes.…”

Section: Introductionmentioning

confidence: 99%

A chromosome-level genome assembly of Hong Kong catfish (Clarias fuscus) uncovers a sex-determining region

et al. 2023

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Background Hong Kong catfish (Clarias fuscus) is an ecologically and economically important species that is widely distributed in freshwater regions of southern China. Hong Kong catfish has significant sexual growth dimorphism. The genome assembly of the Hong Kong catfish would facilitate study of the sex determination and evolution mechanism of the species. Results The first high-quality chromosome-level genome of the Hong Kong catfish was constructed. The total genome was 933.4 Mb, with 416 contigs and a contig N50 length of 8.52 Mb. Using high-throughput chromosome conformation capture (Hi-C) data, the genome assembly was divided into 28 chromosomes with a scaffold N50 length of 36.68 Mb. A total of 23,345 protein-coding genes were predicted in the genome, and 94.28% of the genes were functionally annotated in public databases. Phylogenetic analysis indicated that C. fuscus and Clarias magur diverged approximately 63.7 million years ago. The comparative genome results showed that a total of 60 unique, 353 expanded and 851 contracted gene families were identified in Hong Kong catfish. A sex-linked quantitative trait locus identified in a previous study was located in a sex-determining region of 30.26 Mb (0.02 to 30.28 Mb) on chromosome 13 (Chr13), the predicted Y chromosome. This QTL region contained 785 genes, of which 18 were identified as sex-related genes. Conclusions This study is the first to report the chromosome-level genome assembly of Hong Kong catfish. The study provides an excellent genetic resource that will facilitate future studies of sex determination mechanisms and evolution in fish.

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“…The information regarding other physical features such as shape, size, and colour can also be recorded during these procedures (Muchlisin, 2013). The fish's body weight is another variable that can be considered in this analysis for fish growth pattern, age determination, and fishery assessment (Fagbuaro et al, 2015, Fazazi et al, 2019.…”

Section: Morphological Techniquesmentioning

confidence: 99%

“…Therefore, the morphology of fishes is considered a valuable tool for species discrimination (Begg and Waldman, 1999;Cadrin and Friedland, 1999;Jakubavičiūtė et al, 2018). Thus, the method of morphometric analysis can be used for differentiating closely related species (Manimegalai et al, 2010, Fazazi et al, 2019.…”

Section: Morphological Techniquesmentioning

confidence: 99%

Identification of Macrourus species (Teleostei: Gadiformes) found near Prince Edward Islands in the Southern Ocean using molecular and morphological analyse.

Shadamorgan

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The genus Macrourus belongs to the family Macrouridae that consist mainly of deep-sea fish.Macrourus contains five species that have a polar distribution, with one species, M. berglax, found in the Atlantic Ocean, and the other four species, M. carinatus, M. holotrachys, M. whitsoni and M. caml, found in the Southern Ocean. The species found in the Southern Ocean are morphologically similar to each other and have overlapping distributional patterns, as a result there have been instances of misidentifications within this genus. Based on morphological characteristics, previous studies have grouped the Southern Ocean Macrourus species into two pairs, viz M. carinatus and M. holotrachys, and M. whitsoni and M. caml. Despite overlapping occurrence elsewhere, morphological studies conducted in the Prince Edward Islands (PEIs) located in the Southern Ocean, have identified only one Macrourus species, M. carinatus. Since there are known cases of species misidentification using morphological identification and distribution overlap within this genus, there is a need for a molecular study that will complement the morphological data. There are no published molecular studies that reviewed species identification in these islands. This study aimed to identify Macrourus specimens found near the PEIs using molecular and morphological analyses. This assessment was done by sequencing the cytochrome c oxidase subunit 1 gene, and by measuring and counting morphometric and meristic characters. The BLAST search which had a sequence similarity of 99 -100%, showed that there are two species represented in this dataset which were identified as M. carinatus and M. holotrachys. This observation was supported by both the phylogenetic and haplotype network trees, which formed two distinct clades. On the other hand, the morphological data did not separate the two species, supporting previous studies that discovered high levels of morphological similarity between M. carinatus and M. holotrachys, which ultimately led to their grouping and/or misidentification. It can therefore be concluded that there are at least two Macrourus species inhabiting waters around PEIs, which are morphologically similar.

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Sexual dimorphism in body weight, morphometric measures and indices of African Catfish (Clarias gariepinus)

Cited by 9 publications

References 3 publications

Evidence of secondary sexual dimorphism in King Tiger Plecos Hypancistrus sp, Loricariidae, of the Amazon River basin

Evidence of secondary sexual dimorphism in King Tiger Plecos Hypancistrus sp, Loricariidae, of the Amazon River basin

A chromosome-level genome assembly of Hong Kong catfish (Clarias fuscus) uncovers a sex-determining region

Identification of Macrourus species (Teleostei: Gadiformes) found near Prince Edward Islands in the Southern Ocean using molecular and morphological analyse.

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