Comparison of vertebral number between wild and hatchery-reared population, and effect of stock enhancement programs on vertebral number in masu salmon &lt;i&gt;Oncorhynchus masou&lt;/i&gt;

Ando, Daisei; Saito, Kazutaka; Takeuchi, Katsumi; Iijima, Anai; Urabe, Hirokazu; Shinriki, Yoshihito; Nakajima, Masamichi

doi:10.2331/suisan.19-00007

Cited by 2 publications

(1 citation statement)

References 23 publications

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“…Счётные элементы для детерминации особей заводского и естественного происхождения тихоокеанских лососей используются реже. Примером является работа японских авторов (Ando et al, 2019), продемонстрировавших, что для «дикой» симы O. masou о. Хоккайдо характерно меньшее число счётных элементов по сравнению с рыбами естественного происхождения, что подтверждается нашими результатами.…”

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Morphological differentiation of Amur fall Chum salmon juveniles Oncorhynchus keta (Salmonidae) of natural and hatchery origin

Mikheev¹,

Polygalova

Pomelova

et al. 2022

jour

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The results of a comparative analysis of the number of myotomes and fin rays in the dorsal and anal fins of Amur fall chum salmon fry of artificial and natural origin are presented. Juveniles of natural origin were distinguished by large values of the analyzed morphological features. The results can be used for the determination of juvenile chum salmon of natural and artificial origin at the intra-basin level for large tributaries of the Amur River.

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Morphological differentiation of Amur fall Chum salmon juveniles Oncorhynchus keta (Salmonidae) of natural and hatchery origin

Mikheev¹,

Polygalova

Pomelova

et al. 2022

jour

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Sequence of formation and inheritance of meristic variation in the post‐cranial axial skeleton of Atlantic salmon (Salmo salar)

Praphu Philip,

Fraser,

Nordvik

et al. 2024

Journal of Fish Biology

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Atlantic salmon is an important aquaculture species that has fascinated naturalists for centuries, resulting in its biology being widely characterized. Certain details about the early development and the inheritance of meristic variation in the post‐cranial axial skeleton are, however, largely unexplored. The present study gives a detailed description of the sequence of formation of the post‐cranial axial skeleton based on whole‐mount staining and used radiology to investigate the inheritance of meristic variation in isogenic hybrid all‐male families of Atlantic salmon (~4 kg). Eight different families were created by crossing two homozygous double haploid XX females (dam A, B) with four different double haploid homozygous YY super males (sires a to d). In the caudal fin complex, the first bone to form is hypural 1 and its associated lepidotrichia followed by a bidirectional formation of new bones. In the dorsal and anal fins, development starts in the cranial part, and new bones form bidirectionally towards the head and tail fin. The neural and haemal arches start to form at segment 43, and further development is bidirectional. The first parapophysis form in the caudal part of the abdomen followed by a unidirectional completion cranially. The first ribs form at segment 3 and new ribs develop unidirectional caudally. Chordacentra formation starts at segment 24 followed by formation of chordacentrum number 58 (caudal‐most vertebra). New chordacentrae form bidirectionally from segment 24 in parallel with the formation of chordacentrum number 57. The first epineuralia form at segment 1 followed by a unidirectional completion caudally until segment 30. The first supraneuralia to develop is number 10 closely followed by number 1, then new supraneurals form bidirectionally from number 10. Analysis of the inheritance on the post‐cranial axial skeletal bones showed a strong maternal effect on total vertebrae centra and tail fin lepidotrichia counts. For these skeletal counts, dam A produced offspring with modes of 58 and 45 respectively, while dam B produced offspring with modes of 59 and 42. The higher number of total vertebrae centra produced by dam B was associated with additional abdominal and/or transitional vertebrae. The completion of formation in different post‐cranial axial skeletal parts are either bi‐ or unidirectional, and the initiation of formation is site specific for each skeletal part with some inter‐part similarities. Further, the present results may suggest that there has been a maternally driven selection for more abdominal vertebrae associated with a higher number of total vertebrae, and more tail fin lepidotrichia associated with a lower number of total vertebrae. These changing meristic counts may impact on important fitness‐related traits, such as fecundity and swimming ability, making the present findings relevant for both ecological and aquaculture sciences.

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Comparison of vertebral number between wild and hatchery-reared population, and effect of stock enhancement programs on vertebral number in masu salmon <i>Oncorhynchus masou</i>

Abstract: Comparison of vertebral number between wild and hatchery-reared population, and eŠect of stock enhancement programs on vertebral number in masu salmon Oncorhynchus masou DAISEI ANDO, 1 KAZUTAKA SHIMODA, 2a KATSUMI TAKEUCHI, 2 ANAI IIJIMA, 3b

Cited by 2 publications

References 23 publications

Morphological differentiation of Amur fall Chum salmon juveniles Oncorhynchus keta (Salmonidae) of natural and hatchery origin

Morphological differentiation of Amur fall Chum salmon juveniles Oncorhynchus keta (Salmonidae) of natural and hatchery origin

Sequence of formation and inheritance of meristic variation in the post‐cranial axial skeleton of Atlantic salmon (Salmo salar)

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