Sexually mature European eels (Anguilla anguilla L.) stimulate gonadal development of neighbouring males: possible involvement of chemical communication
This study was aimed to investigate whether sexual maturation of immature male eels could be stimulated indirectly by placing them in contact with either male (Minj) or female (Finj) eels in which sexual maturation had been stimulated directly by weekly injections of human chorionic gonadotropin (hC...
Published in: | General and Comparative Endocrinology |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier
2014
|
Subjects: | |
Online Access: | http://hdl.handle.net/10400.1/3946 https://doi.org/10.1016/j.ygcen.2006.01.017 |
id |
ftunivalgarve:oai:sapientia.ualg.pt:10400.1/3946 |
---|---|
record_format |
openpolar |
spelling |
ftunivalgarve:oai:sapientia.ualg.pt:10400.1/3946 2023-05-15T13:28:11+02:00 Sexually mature European eels (Anguilla anguilla L.) stimulate gonadal development of neighbouring males: possible involvement of chemical communication Huertas, Mar Scott, A. P. Hubbard, Peter Canario, Adelino V. M. Cerda, J. 2014-05-13T09:39:31Z http://hdl.handle.net/10400.1/3946 https://doi.org/10.1016/j.ygcen.2006.01.017 eng eng Elsevier Huertas, M.; Scott, A. P.; Hubbard, P. C.; Canario, A. V. M.; Cerda, J. Sexually mature European eels (Anguilla anguilla L.) stimulate gonadal development of neighbouring males: Possible involvement of chemical communication, General and Comparative Endocrinology, 147, 3, 304-313, 2006. 0016-6480 AUT: ACA00258; http://hdl.handle.net/10400.1/3946 http://dx.doi.org/10.1016/j.ygcen.2006.01.017 restrictedAccess Olfaction Pheromone Steroid release Plasma steroids Spermatogenesis Ovulation Eel article 2014 ftunivalgarve https://doi.org/10.1016/j.ygcen.2006.01.017 2022-05-30T08:45:46Z This study was aimed to investigate whether sexual maturation of immature male eels could be stimulated indirectly by placing them in contact with either male (Minj) or female (Finj) eels in which sexual maturation had been stimulated directly by weekly injections of human chorionic gonadotropin (hCG) or salmon pituitary extract (SPE), respectively. Untreated males were placed either in the same tank or in a separate tank that was linked to the injected Wsh via a recirculation system. The hormonal treatments stimulated spermatogenesis and spermiation in Minj, and ovulation in Finj as well as an increase of the ocular (Io) and gonadosomatic (GSI) indices in both sexes. Plasma levels of testosterone (T) and 11-ketotestosterone (11-KT) increased in Minj and T and 17 -estradiol (E2) in Finj. A small peak of plasma 17,20 -dihydroxypregn-4-en-3-one (17,20 P) occurred during ovulation, while the plasma levels of 17 -hydroxypregn-4- ene-3,20-dione (17P) were undetectable in both males and females. The water conditioned by Minj and Finj induced signiWcant, though relatively minor, increases in Io and GSI in uninjected males. In addition, uninjected Wsh showed small changes in plasma T and 11-KT levels, apparently related to the timing of spermiation and ovulation of Minj and Finj, respectively, as well as an activation of spermatogenesis (but not spermiation). Injected Wsh released free and conjugated T, 11-KT and E2 into the water, although immature eels were unable to smell (by electro-olfactogram) any of these steroids or prostaglandin F2 . However, immature males were highly sensitive to water extracts conditioned by spermiating Minj and pre-ovulatory and ovulated Finj. These preliminary results suggest the existence of chemical communication between maturing eels and immature males that stimulates gonad development, although the putative pheromone(s) involved has/have not yet been identiWed. Article in Journal/Newspaper Anguilla anguilla Universidade do Algarve: Sapienta General and Comparative Endocrinology 147 3 304 313 |
institution |
Open Polar |
collection |
Universidade do Algarve: Sapienta |
op_collection_id |
ftunivalgarve |
language |
English |
topic |
Olfaction Pheromone Steroid release Plasma steroids Spermatogenesis Ovulation Eel |
spellingShingle |
Olfaction Pheromone Steroid release Plasma steroids Spermatogenesis Ovulation Eel Huertas, Mar Scott, A. P. Hubbard, Peter Canario, Adelino V. M. Cerda, J. Sexually mature European eels (Anguilla anguilla L.) stimulate gonadal development of neighbouring males: possible involvement of chemical communication |
topic_facet |
Olfaction Pheromone Steroid release Plasma steroids Spermatogenesis Ovulation Eel |
description |
This study was aimed to investigate whether sexual maturation of immature male eels could be stimulated indirectly by placing them in contact with either male (Minj) or female (Finj) eels in which sexual maturation had been stimulated directly by weekly injections of human chorionic gonadotropin (hCG) or salmon pituitary extract (SPE), respectively. Untreated males were placed either in the same tank or in a separate tank that was linked to the injected Wsh via a recirculation system. The hormonal treatments stimulated spermatogenesis and spermiation in Minj, and ovulation in Finj as well as an increase of the ocular (Io) and gonadosomatic (GSI) indices in both sexes. Plasma levels of testosterone (T) and 11-ketotestosterone (11-KT) increased in Minj and T and 17 -estradiol (E2) in Finj. A small peak of plasma 17,20 -dihydroxypregn-4-en-3-one (17,20 P) occurred during ovulation, while the plasma levels of 17 -hydroxypregn-4- ene-3,20-dione (17P) were undetectable in both males and females. The water conditioned by Minj and Finj induced signiWcant, though relatively minor, increases in Io and GSI in uninjected males. In addition, uninjected Wsh showed small changes in plasma T and 11-KT levels, apparently related to the timing of spermiation and ovulation of Minj and Finj, respectively, as well as an activation of spermatogenesis (but not spermiation). Injected Wsh released free and conjugated T, 11-KT and E2 into the water, although immature eels were unable to smell (by electro-olfactogram) any of these steroids or prostaglandin F2 . However, immature males were highly sensitive to water extracts conditioned by spermiating Minj and pre-ovulatory and ovulated Finj. These preliminary results suggest the existence of chemical communication between maturing eels and immature males that stimulates gonad development, although the putative pheromone(s) involved has/have not yet been identiWed. |
format |
Article in Journal/Newspaper |
author |
Huertas, Mar Scott, A. P. Hubbard, Peter Canario, Adelino V. M. Cerda, J. |
author_facet |
Huertas, Mar Scott, A. P. Hubbard, Peter Canario, Adelino V. M. Cerda, J. |
author_sort |
Huertas, Mar |
title |
Sexually mature European eels (Anguilla anguilla L.) stimulate gonadal development of neighbouring males: possible involvement of chemical communication |
title_short |
Sexually mature European eels (Anguilla anguilla L.) stimulate gonadal development of neighbouring males: possible involvement of chemical communication |
title_full |
Sexually mature European eels (Anguilla anguilla L.) stimulate gonadal development of neighbouring males: possible involvement of chemical communication |
title_fullStr |
Sexually mature European eels (Anguilla anguilla L.) stimulate gonadal development of neighbouring males: possible involvement of chemical communication |
title_full_unstemmed |
Sexually mature European eels (Anguilla anguilla L.) stimulate gonadal development of neighbouring males: possible involvement of chemical communication |
title_sort |
sexually mature european eels (anguilla anguilla l.) stimulate gonadal development of neighbouring males: possible involvement of chemical communication |
publisher |
Elsevier |
publishDate |
2014 |
url |
http://hdl.handle.net/10400.1/3946 https://doi.org/10.1016/j.ygcen.2006.01.017 |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_relation |
Huertas, M.; Scott, A. P.; Hubbard, P. C.; Canario, A. V. M.; Cerda, J. Sexually mature European eels (Anguilla anguilla L.) stimulate gonadal development of neighbouring males: Possible involvement of chemical communication, General and Comparative Endocrinology, 147, 3, 304-313, 2006. 0016-6480 AUT: ACA00258; http://hdl.handle.net/10400.1/3946 http://dx.doi.org/10.1016/j.ygcen.2006.01.017 |
op_rights |
restrictedAccess |
op_doi |
https://doi.org/10.1016/j.ygcen.2006.01.017 |
container_title |
General and Comparative Endocrinology |
container_volume |
147 |
container_issue |
3 |
container_start_page |
304 |
op_container_end_page |
313 |
_version_ |
1766402704024797184 |