The implications of temperature-mediated plasticity in larval instar number for development within a marine invertebrate, the shrimp Palaemonetes varians.

Variations in larval instar number are common among arthropods. Here, we assess the implications of temperature-mediated variations in larval instar number for larval development time, larval growth rates, and juvenile dry weight within the palaemonid shrimp, Palaemonetes varians. In contrast with p...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Andrew Oliphant, Chris Hauton, Sven Thatje
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/6b72b61428754120bf183942b1a6f9bd
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:6b72b61428754120bf183942b1a6f9bd
record_format	dspace
spelling	oai:doaj.org-article:6b72b61428754120bf183942b1a6f9bd2021-11-18T08:54:28ZThe implications of temperature-mediated plasticity in larval instar number for development within a marine invertebrate, the shrimp Palaemonetes varians.1932-620310.1371/journal.pone.0075785https://doaj.org/article/6b72b61428754120bf183942b1a6f9bd2013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24069450/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203Variations in larval instar number are common among arthropods. Here, we assess the implications of temperature-mediated variations in larval instar number for larval development time, larval growth rates, and juvenile dry weight within the palaemonid shrimp, Palaemonetes varians. In contrast with previous literature, which focuses on terrestrial arthropods, particularly model and pest species often of laboratory lines, we use wild shrimp, which differ in their life history from previous models. Newly-hatched P. varians larvae were first reared at 5, 10, 17, 25, and 30 °C to assess their thermal scope for development. Larvae developed at 17, 25, and 30 °C. At higher temperatures, larvae developed through fewer larval instars. Two dominant developmental pathways were observed; a short pathway of four instars and a long pathway of five instars. Longer developmental pathways of six to seven instars were rarely observed (mostly at lower temperatures) and consisted of additional instars as 'repeat' instars; i.e. little developmental advance over the preceding instar. To assess the implications of temperature-mediated variation in larval instar number, newly-hatched larvae were then reared at 15, 20, and 25 °C. Again, the proportion of larvae developing through four instars increased with temperature. At all temperatures, larval development time and juvenile dry weight were greater for larvae developing through five instars. Importantly, because of the increasing proportion of larvae developing through four instars with increasing temperature, larval traits associated with this pathway (reduced development time and juvenile dry weight) became more dominant. As a consequence of increasing growth rate with temperature, and the shift in the proportion of larvae developing through four instars, juvenile dry weight was greatest at intermediate temperatures (20 °C). We conclude that at settlement P. varians juveniles do not follow the temperature-size rule; this is of importance for life-history ecology in response to environmental change, as well as for aquaculture applications.Andrew OliphantChris HautonSven ThatjePublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 9, p e75785 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Andrew Oliphant Chris Hauton Sven Thatje The implications of temperature-mediated plasticity in larval instar number for development within a marine invertebrate, the shrimp Palaemonetes varians.
description	Variations in larval instar number are common among arthropods. Here, we assess the implications of temperature-mediated variations in larval instar number for larval development time, larval growth rates, and juvenile dry weight within the palaemonid shrimp, Palaemonetes varians. In contrast with previous literature, which focuses on terrestrial arthropods, particularly model and pest species often of laboratory lines, we use wild shrimp, which differ in their life history from previous models. Newly-hatched P. varians larvae were first reared at 5, 10, 17, 25, and 30 °C to assess their thermal scope for development. Larvae developed at 17, 25, and 30 °C. At higher temperatures, larvae developed through fewer larval instars. Two dominant developmental pathways were observed; a short pathway of four instars and a long pathway of five instars. Longer developmental pathways of six to seven instars were rarely observed (mostly at lower temperatures) and consisted of additional instars as 'repeat' instars; i.e. little developmental advance over the preceding instar. To assess the implications of temperature-mediated variation in larval instar number, newly-hatched larvae were then reared at 15, 20, and 25 °C. Again, the proportion of larvae developing through four instars increased with temperature. At all temperatures, larval development time and juvenile dry weight were greater for larvae developing through five instars. Importantly, because of the increasing proportion of larvae developing through four instars with increasing temperature, larval traits associated with this pathway (reduced development time and juvenile dry weight) became more dominant. As a consequence of increasing growth rate with temperature, and the shift in the proportion of larvae developing through four instars, juvenile dry weight was greatest at intermediate temperatures (20 °C). We conclude that at settlement P. varians juveniles do not follow the temperature-size rule; this is of importance for life-history ecology in response to environmental change, as well as for aquaculture applications.
format	article
author	Andrew Oliphant Chris Hauton Sven Thatje
author_facet	Andrew Oliphant Chris Hauton Sven Thatje
author_sort	Andrew Oliphant
title	The implications of temperature-mediated plasticity in larval instar number for development within a marine invertebrate, the shrimp Palaemonetes varians.
title_short	The implications of temperature-mediated plasticity in larval instar number for development within a marine invertebrate, the shrimp Palaemonetes varians.
title_full	The implications of temperature-mediated plasticity in larval instar number for development within a marine invertebrate, the shrimp Palaemonetes varians.
title_fullStr	The implications of temperature-mediated plasticity in larval instar number for development within a marine invertebrate, the shrimp Palaemonetes varians.
title_full_unstemmed	The implications of temperature-mediated plasticity in larval instar number for development within a marine invertebrate, the shrimp Palaemonetes varians.
title_sort	implications of temperature-mediated plasticity in larval instar number for development within a marine invertebrate, the shrimp palaemonetes varians.
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/6b72b61428754120bf183942b1a6f9bd
work_keys_str_mv	AT andrewoliphant theimplicationsoftemperaturemediatedplasticityinlarvalinstarnumberfordevelopmentwithinamarineinvertebratetheshrimppalaemonetesvarians AT chrishauton theimplicationsoftemperaturemediatedplasticityinlarvalinstarnumberfordevelopmentwithinamarineinvertebratetheshrimppalaemonetesvarians AT sventhatje theimplicationsoftemperaturemediatedplasticityinlarvalinstarnumberfordevelopmentwithinamarineinvertebratetheshrimppalaemonetesvarians AT andrewoliphant implicationsoftemperaturemediatedplasticityinlarvalinstarnumberfordevelopmentwithinamarineinvertebratetheshrimppalaemonetesvarians AT chrishauton implicationsoftemperaturemediatedplasticityinlarvalinstarnumberfordevelopmentwithinamarineinvertebratetheshrimppalaemonetesvarians AT sventhatje implicationsoftemperaturemediatedplasticityinlarvalinstarnumberfordevelopmentwithinamarineinvertebratetheshrimppalaemonetesvarians
_version_	1718421206233776128

The implications of temperature-mediated plasticity in larval instar number for development within a marine invertebrate, the shrimp Palaemonetes varians.

Ejemplares similares