Sperm production and quality in European eel (Anguilla anguilla) in relation to hormonal treatment

Aquaculture production relies on controlled management of gametogenesis, especially in species where assisted reproduction is needed for obtaining gametes in captivity. The present study used human chorionic gonadotropin (hCG) treatments to induce and sustain spermatogenesis in European eel (Anguill...

Full description

Saved in:
Bibliographic Details
Published in:Reproduction in domestic animals 2021-12, Vol.56 (12), p.1497-1505
Main Authors: Koumpiadis, Paraskevas, Sganga, Daniela E., Politis, Sebastian N., Gallego, Victor, Butts, Ian A. E., Asturiano, Juan F., Batjakas, Ioannis E., Tomkiewicz, Jonna
Format: Article
Language:English
Subjects:
Anguilla
Anguilla anguilla
Animals
Aquaculture
Captivity
CASA
Chorionic Gonadotropin
Density
Gametes
Gametogenesis
Gonadotropins
haemocytometer
Kinematics
Male
Males
Materials handling
Parameters
Pituitary (anterior)
Reproduction (biology)
Spawning
Sperm
Sperm Count - veterinary
sperm density
sperm motility
spermatocrit
Spermatogenesis
Spermatozoa
Strip
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Aquaculture production relies on controlled management of gametogenesis, especially in species where assisted reproduction is needed for obtaining gametes in captivity. The present study used human chorionic gonadotropin (hCG) treatments to induce and sustain spermatogenesis in European eel (Anguilla anguilla). The aim was to evaluate effects of strip‐spawning timing (12 vs. 24 hr) after weekly administration of hCG and the necessity of a primer dose (in addition to weekly hormonal treatment) prior to strip spawning (primer vs. no‐primer) on sperm quality parameters. Sperm parameters included milt production (weight), density and sperm kinematics at Week 9, 11 and 13 after onset of treatment. Spermiation commenced in 11.5% of males in Week 5 and by Week 9, and all males produced milt. Male weight, milt production, sperm density and spermatocrit did not differ among hormonal treatments during the experimental period. Overall, male weight decreased from 106.3 to 93.0 g, milt weight increased from 3.5 to 5.4 g, sperm density counts decreased from 11.7 × 109 to 10.5 × 109 cells/ml, and spermatocrit decreased from 46.5% to 40.5%. Furthermore, spermatocrit was positively related to haemocytometer counts (R2 = .86, p 
ISSN:0936-6768
1439-0531
DOI:10.1111/rda.14011