Morphological divergence within the largest genetically consistent group of wild Tilapia

Autor: Hidetoshi Saito, Seyramsarah Blossom Setufe, Emmanuel Tetteh-Doku Mensah, Patrick Senam Kofi Fatsi, Shaharior Hashem, Ebenezer Koranteng Appiah, Koichiro Kawai
Rok vydání: 2021
Předmět:
Zdroj: Environmental Biology of Fishes. 104:597-613
ISSN: 1573-5133
0378-1909
Popis: Morphometric and meristic data were used in this study to establish morphological variations within the largest genetically consistent groups of five wild populations of tilapia from Kyushu and Okinawa ecological regions of Japan. The genetic analysis based on mitochondrial DNA relatedness was used to determine the data range used for the morphological analyses. During the morphological analyses, the morphometric and meristic data were correlated by two multivariate statistical methods, such as PCA and LDA. Both statistical methods observed morphological differences of higher divergence in Okinawa contrary to Kyushu. Additionally, the statistical relationship between the estimated non-parametric test of ANOSIM (R = 0.21; p ˂ 0.05) and PERMANOVA (F = 4.20; p ˂ 0.05) indicated a higher magnitude of morphological separation, especially in Okinawa; nevertheless, water temperature, conductivity, and salinity levels vary widely in Kyushu than in Okinawa. All observed differences could be attributed to either genetic and/or environmental factors, which are major variables in influencing phenotypic variability. However, since tilapia in Japan experienced multiple introductions from different countries and environmental backgrounds, we recommend further studies under a controlled environment to ascertain the environmental responsiveness during morphological differentiation within a genetically consistent group of tilapia.
Databáze: OpenAIRE
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