Effects of temperature on development and survival of embryos and on larval production of Chorus giganteus (Lesson, 1829) (Gastropoda: Muricidae)

Chorus giganteus shows faster intracapsular embryonic development at high temperature but this is generally associated with a high embryonic mortality and low larval production. The present study was undertaken to determine the optimal combination of temperature and developmental stage for a success...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Gallardo,José A, Cancino,Juan M
Lenguaje:	English
Publicado:	Universidad de Valparaíso. Facultad de Ciencias del Mar 2009
Materias:	Intracapsular development hatching trochophore veliger molluscan aquaculture
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572009000300007
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:scielo:S0718-19572009000300007
record_format	dspace
spelling	oai:scielo:S0718-195720090003000072010-03-31Effects of temperature on development and survival of embryos and on larval production of Chorus giganteus (Lesson, 1829) (Gastropoda: Muricidae)Gallardo,José ACancino,Juan M Intracapsular development hatching trochophore veliger molluscan aquaculture Chorus giganteus shows faster intracapsular embryonic development at high temperature but this is generally associated with a high embryonic mortality and low larval production. The present study was undertaken to determine the optimal combination of temperature and developmental stage for a successful (faster) larval production at high temperature. Embryos at three stages of intracapsular development (early stage [ES-embryos], late stage [LS-embryos] and trochophore post nurse-egg ingestion stage [TPI embryos]) were acclimated at 12ºC then incubated at 12, 15 or 18ºC to evaluated larval production. The median hatch time was accelerated by increasing water temperature. However, the hatching success of ES- and LS-embryos was compromised by higher temperatures, decreasing from a 51 ± 2% at 12ºC to 8 ± 1% at 18ºC in ES-embryos and from 53 ± 2% at 12ºC to 20 ± 0.2% at 18ºC in LS-embryos. The incidence of developmental abnormality increased with temperature from 14 ± 2% at 12ºC to 46 ± 3% at 18ºC in ES-embryos and from 8 ± 1% at 12ºC to 28 ± 1% at 18ºC in LS-embryos. By contrast, hatching success of TPI embryos ranged from 65-70% and the incidence abnormality was only between 13 and 20%, with both factors being independent of temperature. Thus the probability of producing and releasing normal larvae was significantly affected by the combined effect of temperature and embryonic stage at the initiation of the culture. A reduced ability to ingest nurse eggs may account for the variation in larval production between the trials.info:eu-repo/semantics/openAccessUniversidad de Valparaíso. Facultad de Ciencias del MarRevista de biología marina y oceanografía v.44 n.3 20092009-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572009000300007en10.4067/S0718-19572009000300007
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Intracapsular development hatching trochophore veliger molluscan aquaculture
spellingShingle	Intracapsular development hatching trochophore veliger molluscan aquaculture Gallardo,José A Cancino,Juan M Effects of temperature on development and survival of embryos and on larval production of Chorus giganteus (Lesson, 1829) (Gastropoda: Muricidae)
description	Chorus giganteus shows faster intracapsular embryonic development at high temperature but this is generally associated with a high embryonic mortality and low larval production. The present study was undertaken to determine the optimal combination of temperature and developmental stage for a successful (faster) larval production at high temperature. Embryos at three stages of intracapsular development (early stage [ES-embryos], late stage [LS-embryos] and trochophore post nurse-egg ingestion stage [TPI embryos]) were acclimated at 12ºC then incubated at 12, 15 or 18ºC to evaluated larval production. The median hatch time was accelerated by increasing water temperature. However, the hatching success of ES- and LS-embryos was compromised by higher temperatures, decreasing from a 51 ± 2% at 12ºC to 8 ± 1% at 18ºC in ES-embryos and from 53 ± 2% at 12ºC to 20 ± 0.2% at 18ºC in LS-embryos. The incidence of developmental abnormality increased with temperature from 14 ± 2% at 12ºC to 46 ± 3% at 18ºC in ES-embryos and from 8 ± 1% at 12ºC to 28 ± 1% at 18ºC in LS-embryos. By contrast, hatching success of TPI embryos ranged from 65-70% and the incidence abnormality was only between 13 and 20%, with both factors being independent of temperature. Thus the probability of producing and releasing normal larvae was significantly affected by the combined effect of temperature and embryonic stage at the initiation of the culture. A reduced ability to ingest nurse eggs may account for the variation in larval production between the trials.
author	Gallardo,José A Cancino,Juan M
author_facet	Gallardo,José A Cancino,Juan M
author_sort	Gallardo,José A
title	Effects of temperature on development and survival of embryos and on larval production of Chorus giganteus (Lesson, 1829) (Gastropoda: Muricidae)
title_short	Effects of temperature on development and survival of embryos and on larval production of Chorus giganteus (Lesson, 1829) (Gastropoda: Muricidae)
title_full	Effects of temperature on development and survival of embryos and on larval production of Chorus giganteus (Lesson, 1829) (Gastropoda: Muricidae)
title_fullStr	Effects of temperature on development and survival of embryos and on larval production of Chorus giganteus (Lesson, 1829) (Gastropoda: Muricidae)
title_full_unstemmed	Effects of temperature on development and survival of embryos and on larval production of Chorus giganteus (Lesson, 1829) (Gastropoda: Muricidae)
title_sort	effects of temperature on development and survival of embryos and on larval production of chorus giganteus (lesson, 1829) (gastropoda: muricidae)
publisher	Universidad de Valparaíso. Facultad de Ciencias del Mar
publishDate	2009
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572009000300007
work_keys_str_mv	AT gallardojosea effectsoftemperatureondevelopmentandsurvivalofembryosandonlarvalproductionofchorusgiganteuslesson1829gastropodamuricidae AT cancinojuanm effectsoftemperatureondevelopmentandsurvivalofembryosandonlarvalproductionofchorusgiganteuslesson1829gastropodamuricidae
_version_	1714202288058269696

Effects of temperature on development and survival of embryos and on larval production of Chorus giganteus (Lesson, 1829) (Gastropoda: Muricidae)

Ejemplares similares