The control of reproduction in finfish species through GnRH treatments
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 8.0px Verdana;">Fish in captivity can show some dysfunctions, at different levels, in the physiological processes of reproduction, due to<span style="font: 12.0px Helvetica;"> </span></p> <p styl...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2010-01-01
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| Series: | Italian Journal of Animal Science |
| Subjects: | |
| Online Access: | http://www.aspajournal.it/index.php/ijas/article/view/249 |
| Summary: | <p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 8.0px Verdana;">Fish in captivity can show some dysfunctions, at different levels, in the physiological processes of reproduction, due to<span style="font: 12.0px Helvetica;"> </span></p> <p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 8.0px Verdana;">the lack of synthesis or release of gonadotropins (GtHs) by hypophysis. As a consequence, a worsening of quality and<span style="font: 12.0px Helvetica;"> </span></p> <p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 8.0px Verdana;">quantity of spawned gametes, or a lack of egg and sperm spawning, can be observed. The farmers can act on fish repro-<span style="font: 12.0px Helvetica;"> </span></p> <p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 8.0px Verdana;">ductive cycle manipulating the environmental parameters of rearing, the diet, the genetics or using GnRH treatments.<span style="font: 12.0px Helvetica;"> </span></p> <p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 8.0px Verdana;">Nowadays, they are used mainly GnRH, synthesized in laboratory as analogues. These releasing factors, naturally pro-<span style="font: 12.0px Helvetica;"> </span></p> <p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 8.0px Verdana;">duced by hypothalamus, let to overcome the technological and biological limits of the “traditional” hormonal treatments<span style="font: 12.0px Helvetica;"> </span></p> <p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 8.0px Verdana;">with hCG, being more effective, cheaper and easily available on market. This article makes a historical survey of the con-<span style="font: 12.0px Helvetica;"> </span></p> <p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 8.0px Verdana;">ditioning treatments for fish reproduction and also considers the future perspectives of these treatments, examining the<span style="font: 12.0px Helvetica;"> </span></p> <p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 8.0px Verdana;">topics that research will have to focus, in order to make these treatments common worldwide, in any hatchery and for<span style="font: 12.0px Helvetica;"> </span></p> <p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 8.0px Verdana;">each farmed species of finfish.<span style="font: 12.0px Helvetica;"> </span></p><div><span style="font-family: Helvetica, Arial, Helvetica, sans-serif; font-size: small;"><span style="font-size: 12px;"><br /></span></span></div> |
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| ISSN: | 1594-4077 1828-051X |