Effects of age on the reproductive performance of different males and females in bighead carp Hypophthalmichthys nobilis (Richardson, 1845)

Effects of age on the reproductive performance of different males and females in bighead carp... The age of fish can affect reproductive performance in relation to the gamete quality and productivity which might be expected to be changed in older individuals. The consideration can be important in artificial propagation in relation to the selection of broodstock. We determined the age-related changes in male and female reproductive characteristics of the bighead carp Hypophthalmichthys nobilis and then we examined the effects of age on the male and female reproductive fitness in terms of fertilization, hatching, and larvae survival rate. A total of eight 3–4-year-old males and eight 4–5-year-old females were crossed using a factorial breeding design. Fertilization, hatching, and larvae survival rates were counted. We found no significant difference between 3 and 4 year olds in the sperm motility traits, density, and spermatocrit, but significant differences (p < 0.05) were observed in the ionic composition (mainly Na+, K+, Ca2+, Mg2+), acid phosphatase, and glucose level. The quantitative characteristics between two age groups (4 and 5-year-olds) of the females showed significant differences (p < 0.05) in total weight of stripped egg, ovarian weight, and relative fecundity, while no significant differences were found in egg size, absolute fecundity, and gonadosomatic index (GSI). In fertilization trials, we found that male age strongly influences fertilization (p < 0.05), embryonic development (p < 0.05), and larval survivability (p < 0.001), while significant female effects, as well as male and female interactions (p < 0.001 for all) were only observed for 7 days post-hatching larval survivability. One-way ANOVA showed significant differences among the fertilization (F = 3.797, p = 0.05), hatching (F = 4.802, p = 0.03), and larvae survival rate (F = 32.94, p = 0.001). Our results suggest that crosses between 4-year-old males and 5-year-old females of bighead carp achieved the best reproductive output. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Comparative Clinical Pathology Springer Journals

Effects of age on the reproductive performance of different males and females in bighead carp Hypophthalmichthys nobilis (Richardson, 1845)

Loading next page...
 
/lp/springer_journal/effects-of-age-on-the-reproductive-performance-of-different-males-and-7bdn96NOGV
Publisher
Springer London
Copyright
Copyright © 2017 by Springer-Verlag London Ltd.
Subject
Medicine & Public Health; Pathology; Hematology; Oncology
eISSN
1618-565X
D.O.I.
10.1007/s00580-017-2503-6
Publisher site
See Article on Publisher Site

Abstract

The age of fish can affect reproductive performance in relation to the gamete quality and productivity which might be expected to be changed in older individuals. The consideration can be important in artificial propagation in relation to the selection of broodstock. We determined the age-related changes in male and female reproductive characteristics of the bighead carp Hypophthalmichthys nobilis and then we examined the effects of age on the male and female reproductive fitness in terms of fertilization, hatching, and larvae survival rate. A total of eight 3–4-year-old males and eight 4–5-year-old females were crossed using a factorial breeding design. Fertilization, hatching, and larvae survival rates were counted. We found no significant difference between 3 and 4 year olds in the sperm motility traits, density, and spermatocrit, but significant differences (p < 0.05) were observed in the ionic composition (mainly Na+, K+, Ca2+, Mg2+), acid phosphatase, and glucose level. The quantitative characteristics between two age groups (4 and 5-year-olds) of the females showed significant differences (p < 0.05) in total weight of stripped egg, ovarian weight, and relative fecundity, while no significant differences were found in egg size, absolute fecundity, and gonadosomatic index (GSI). In fertilization trials, we found that male age strongly influences fertilization (p < 0.05), embryonic development (p < 0.05), and larval survivability (p < 0.001), while significant female effects, as well as male and female interactions (p < 0.001 for all) were only observed for 7 days post-hatching larval survivability. One-way ANOVA showed significant differences among the fertilization (F = 3.797, p = 0.05), hatching (F = 4.802, p = 0.03), and larvae survival rate (F = 32.94, p = 0.001). Our results suggest that crosses between 4-year-old males and 5-year-old females of bighead carp achieved the best reproductive output.

Journal

Comparative Clinical PathologySpringer Journals

Published: Jun 19, 2017

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve Freelancer

DeepDyve Pro

Price
FREE
$49/month

$360/year
Save searches from
Google Scholar,
PubMed
Create lists to
organize your research
Export lists, citations
Read DeepDyve articles
Abstract access only
Unlimited access to over
18 million full-text articles
Print
20 pages/month
PDF Discount
20% off