Broodstock management and induced spawning of flounder Paralichthys orbignyanus (Valenciennes, 1839) under a closed recirculated system

The present study was conducted to determine the parameters regulating spawning performance of P. orbignyanus wild broodstock. The adaptation to captivity was successfully achieved with minimal stress levels. In three consecutive spawning seasons, the annual photothermal manipulation was not effecti...

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Autores principales:	Bambill,Gabriel A, Oka,Masakazu, Radonic,Mariela, López,Andrea V, Müller,Mónica I, Boccanfuso,Juan J, Bianca,Federico A
Lenguaje:	English
Publicado:	Universidad de Valparaíso. Facultad de Ciencias del Mar 2006
Materias:	Photothermal conditioning stripping HCG Pisces
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572006000100007
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spelling	oai:scielo:S0718-195720060001000072006-11-23Broodstock management and induced spawning of flounder Paralichthys orbignyanus (Valenciennes, 1839) under a closed recirculated systemBambill,Gabriel AOka,MasakazuRadonic,MarielaLópez,Andrea VMüller,Mónica IBoccanfuso,Juan JBianca,Federico A Photothermal conditioning stripping HCG Pisces The present study was conducted to determine the parameters regulating spawning performance of P. orbignyanus wild broodstock. The adaptation to captivity was successfully achieved with minimal stress levels. In three consecutive spawning seasons, the annual photothermal manipulation was not effective for the maturation and natural spawning of females although males were running. Females were HCG injected, releasing non fertilized eggs. Artificial fertilization was carried out after stripping the fish with a total production of 18,000 fertilized eggs in 2001 (egg diameter= 800±10 µm), 55,300 in 2002 (egg diameter= 850±12 µm) and 1,635,000 fertilized eggs in 2003 (egg diameter 818.4 ±30.08 µm, oil drop 98.1 ±2.96 µm). For the study of the ovulation time, females were hand-stripped every 48 h (female 1), 96 h (female 2) and 144 h (female 3), after being induced by hormones. No statistical differences were found for fertilization and hatching rates and SAI. This could be attributed to the small sample sizes, individual variation and/or stripping frequencies. Nevertheless, qualitative differences were evident. Although long-term studies are needed to confirm these observations, 96 h stripping frequency could be considered a good technique to obtain eggs and larvae experimentally. The estimated fecundity by this technique varied from 185,951 to 399,118 total eggs per kg of femaleinfo:eu-repo/semantics/openAccessUniversidad de Valparaíso. Facultad de Ciencias del MarRevista de biología marina y oceanografía v.41 n.1 20062006-07-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572006000100007en10.4067/S0718-19572006000100007
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Photothermal conditioning stripping HCG Pisces
spellingShingle	Photothermal conditioning stripping HCG Pisces Bambill,Gabriel A Oka,Masakazu Radonic,Mariela López,Andrea V Müller,Mónica I Boccanfuso,Juan J Bianca,Federico A Broodstock management and induced spawning of flounder Paralichthys orbignyanus (Valenciennes, 1839) under a closed recirculated system
description	The present study was conducted to determine the parameters regulating spawning performance of P. orbignyanus wild broodstock. The adaptation to captivity was successfully achieved with minimal stress levels. In three consecutive spawning seasons, the annual photothermal manipulation was not effective for the maturation and natural spawning of females although males were running. Females were HCG injected, releasing non fertilized eggs. Artificial fertilization was carried out after stripping the fish with a total production of 18,000 fertilized eggs in 2001 (egg diameter= 800±10 µm), 55,300 in 2002 (egg diameter= 850±12 µm) and 1,635,000 fertilized eggs in 2003 (egg diameter 818.4 ±30.08 µm, oil drop 98.1 ±2.96 µm). For the study of the ovulation time, females were hand-stripped every 48 h (female 1), 96 h (female 2) and 144 h (female 3), after being induced by hormones. No statistical differences were found for fertilization and hatching rates and SAI. This could be attributed to the small sample sizes, individual variation and/or stripping frequencies. Nevertheless, qualitative differences were evident. Although long-term studies are needed to confirm these observations, 96 h stripping frequency could be considered a good technique to obtain eggs and larvae experimentally. The estimated fecundity by this technique varied from 185,951 to 399,118 total eggs per kg of female
author	Bambill,Gabriel A Oka,Masakazu Radonic,Mariela López,Andrea V Müller,Mónica I Boccanfuso,Juan J Bianca,Federico A
author_facet	Bambill,Gabriel A Oka,Masakazu Radonic,Mariela López,Andrea V Müller,Mónica I Boccanfuso,Juan J Bianca,Federico A
author_sort	Bambill,Gabriel A
title	Broodstock management and induced spawning of flounder Paralichthys orbignyanus (Valenciennes, 1839) under a closed recirculated system
title_short	Broodstock management and induced spawning of flounder Paralichthys orbignyanus (Valenciennes, 1839) under a closed recirculated system
title_full	Broodstock management and induced spawning of flounder Paralichthys orbignyanus (Valenciennes, 1839) under a closed recirculated system
title_fullStr	Broodstock management and induced spawning of flounder Paralichthys orbignyanus (Valenciennes, 1839) under a closed recirculated system
title_full_unstemmed	Broodstock management and induced spawning of flounder Paralichthys orbignyanus (Valenciennes, 1839) under a closed recirculated system
title_sort	broodstock management and induced spawning of flounder paralichthys orbignyanus (valenciennes, 1839) under a closed recirculated system
publisher	Universidad de Valparaíso. Facultad de Ciencias del Mar
publishDate	2006
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572006000100007
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Broodstock management and induced spawning of flounder Paralichthys orbignyanus (Valenciennes, 1839) under a closed recirculated system

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