Ultrastructural study of spermatogenesis in silver salmon Oncorhynchus kisutch and cherry salmon O. masou (Salmonidae, Teleostei)

Neznanova, S. Yu.; Reunov, A. A.

doi:10.1134/s1990519x09060121

Cited by 4 publications

(1 citation statement)

References 30 publications

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“…However, the morphology of the spermatozoa demonstrates clearly pronounced interspecific differences. that are characteristic of many boney fish species that have external fertilization [6,11,14,23]. The sperm cells of these fishes possess streamlined heads that lack any apical structures and homogeneous nuclear chro matin (in terms of electron density) that contains only small lacunas filled with a light matrix.…”

Section: Discussionmentioning

confidence: 99%

Ultrastructural study of spermiogenesis in far-eastern redfins of the genus Tribolodon (Pisces: Cyprinidae)

Neznanova

2012

Russ J Mar Biol

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The spermiogenesis and sperm morphology of the Far eastern redfins Tribolodon hakonensis (Gunther, 1880), T. brandtii (Dybowskii, 1872), and T. sachalinensis (Okada, Ikeda, 1937) were studied using scanning and transmission electron microscopy. At the spermatid stage, ultrastructural analysis of male germ cells showed no obvious differences between these species. The spermatozoa are primitive acrosome lacking cells, which are typically found in many representatives of Teleostei with external insemination. Unlike other cyprinids, the angle of inclination of centrioles relative to each other differs slightly in the species under study. The mitochondrial apparatus contains one to five (usually one to three) mitochondria in T. hakonensis, two in T. sachalinensis, and one mitochondrion in T. brandtii.

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Section: Discussionmentioning

confidence: 99%