Abstract
Spermatological research of the Patagonian blennie was carried, specifically biometric parameters, sperm density, sperm count and motility in different activation mediums (815, 716, 590 and 0 mOSm kg−1), at different temperatures (5, 10 and 15°C) and pH levels (5, 7 and 9). The results indicate that Patagonian blennie spermatozoa have a primitive form, with a total length of 44.09 ± 3.36 μm, with a head length of 2.15 ± 0.28 μm and head width of 2.5 ± 0.31 μm. The mid-piece had a length of 0.72 ± 0.12 μm, and its tail measures 41.21 ± 3.21 μm long. The motility pattern indicates that the spermatozoa are found immobile in the seminal plasma and only initiates its movement in a hypertonic medium from 590 to 815 mOsm kg−1. The longest motility time that was registered at 10°C in 716 mOSm kg−1 was of 245 ± 39 s and an optimum pH of 7 was observed.
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