Open AccessAge‐Related Sperm Quality of Captive Striped Bass Morone saxatilis
Author(s) -
And Verapong Vuthiphandchai,
Zohar Yonathan
Publication year - 1999
Publication title -
journal of the world aquaculture society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.655
H-Index - 60
eISSN - 1749-7345
pISSN - 0893-8849
DOI - 10.1111/j.1749-7345.1999.tb00318.x
Subject(s) - milt , biology , sperm , extender , sperm motility , bass (fish) , zoology , spermatogenesis , sperm quality , andrology , ecology , endocrinology , botany , materials science , polyurethane , composite material , medicine
. Three groups of captive‐reared striped bass Morone saxatilis ages 1, 3 and 12 yr, were examined for age‐related changes of sperm characteristics including short‐term storage. All groups had similar ranges of the following parameters (mean× SEM): expressible milt (5.6× 0.5 mI/kg body weight (BW) to 7.5× 2.1 mL/kg BW), percentage of motile sperm (55× 6% to 60× 2%), duration of sperm motility (69× 3 sec to 72× 5 sec) and percentage of viable sperm (91× 2% to 93× 2%). Compared to the 1 and 12‐yr‐old fish, the 3‐yr‐old fish produced the greatest number of spermatozoa (1,190× 370× 10 9 spermatozoa/kg), sperm concentration (120× 8 × 10 9 spermatozoa/mL) and spermatocrit (74× 4%). In addition, during short‐term storage at 4 C, extender‐preserved sperm samples of the 3‐yr‐old group showed a significantly higher ( P < 0.05) percentage of motile sperm and duration of sperm motility, compared to the other two groups. This suggests that short‐term storage may be affected by the age of the male fish. Sperm longevity of the 3‐yr‐old group was successfully maintained for as long as 15 d, longer than that of the 1‐yr‐old group (9 d) and 12‐yr‐old group (7 d). Overall, the 3‐yr‐old fish appeared to have superior sperm quality than the 1 or 12‐yr‐old fish based on higher sperm production and increased sperm longevity.