Changes in biomass and chemical composition during lecithotrophic larval development of the southern stone crab Paralomis granulosa

Changes in biomass and elemental composition (dry mass, W; carbon, C; nitrogen, N; hydrogen, H) were studied in the laboratory during complete larval and early juvenile development of the southern stone crab Paralomis granulosa (Jacquinot). At 6 ± 0.5°C; total larval development from hatching to met...

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Autores principales: Calcagno, Javier Angel, Lovrich, Gustavo Alejandro
Publicado: 2003
Materias:
Cold adaptation
Crustacea
Decapoda
Larval development
Lecithotrophy
Subantarctic
biomass
chemical composition
crab
larval development
metamorphosis
Decapoda (Crustacea taxon)
Decapoda (Crustacea)
Invertebrata
Lithodidae
Paralomis
Paralomis granulosa
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01718630_v257_n_p189_Calcagno
http://hdl.handle.net/20.500.12110/paper_01718630_v257_n_p189_Calcagno
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_01718630_v257_n_p189_Calcagno
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spelling paper:paper_01718630_v257_n_p189_Calcagno2023-06-08T15:18:39Z Changes in biomass and chemical composition during lecithotrophic larval development of the southern stone crab Paralomis granulosa Calcagno, Javier Angel Lovrich, Gustavo Alejandro Cold adaptation Crustacea Decapoda Larval development Lecithotrophy Subantarctic biomass chemical composition crab larval development metamorphosis Crustacea Decapoda (Crustacea taxon) Decapoda (Crustacea) Invertebrata Lithodidae Lithodidae Paralomis Paralomis granulosa Paralomis granulosa Changes in biomass and elemental composition (dry mass, W; carbon, C; nitrogen, N; hydrogen, H) were studied in the laboratory during complete larval and early juvenile development of the southern stone crab Paralomis granulosa (Jacquinot). At 6 ± 0.5°C; total larval development from hatching to metamorphosis lasted ca. 56 d, comprising 2 demersal zoeal stages and a benthic megalopa, with mean stage durations of 5, 11 and 45 d, respectively. All larval stages of P. granulosa are lecithotrophic, and first feeding and growth were consistently observed immediately after metamorphosis to the first juvenile crab stage. Regardless of presence or absence of food, W, C, N, and H decreased throughout larval development. Also the C:N mass ratio decreased significantly, from 7.2 at hatching to 4.2 at metamorphosis, indicating that a large initial lipid store remaining from the egg yolk was gradually utilised as an internal energy source. In total, about 68% of the initial quantities of C and H present at hatching, and 44% of N were lost during non-feeding larval development to metamorphosis. Approximately 10% of the initially present C, N and H were lost with larval exuviae, half of which was lost in the megalopa stage alone. Hence, metabolic biomass degradation accounted for losses of ca. 59% in C and H, but for only 33% in N, Most of the losses in C and H reflected metabolic energy consumption (primarily lipid degradation), while ca. 1/4 of the losses in N and 2/3 of those in W were due to larval exuviation. Complete larval lecithotrophy is based on an enhanced maternal energy investment per offspring, and on energy-saving mechanisms such as low larval locomotory activity and low exuvial losses. These traits are interpreted as bioenergetic adaptations to food-limited conditions in subantarctic regions, where a pronounced seasonality limits the period of primary production. Fil:Calcagno, J.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Lovrich, G.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2003 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01718630_v257_n_p189_Calcagno http://hdl.handle.net/20.500.12110/paper_01718630_v257_n_p189_Calcagno
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Cold adaptation
Crustacea
Decapoda
Larval development
Lecithotrophy
Subantarctic
biomass
chemical composition
crab
larval development
metamorphosis
Crustacea
Decapoda (Crustacea taxon)
Decapoda (Crustacea)
Invertebrata
Lithodidae
Lithodidae
Paralomis
Paralomis granulosa
Paralomis granulosa
spellingShingle Cold adaptation
Crustacea
Decapoda
Larval development
Lecithotrophy
Subantarctic
biomass
chemical composition
crab
larval development
metamorphosis
Crustacea
Decapoda (Crustacea taxon)
Decapoda (Crustacea)
Invertebrata
Lithodidae
Lithodidae
Paralomis
Paralomis granulosa
Paralomis granulosa
Calcagno, Javier Angel
Lovrich, Gustavo Alejandro
Changes in biomass and chemical composition during lecithotrophic larval development of the southern stone crab Paralomis granulosa
topic_facet Cold adaptation
Crustacea
Decapoda
Larval development
Lecithotrophy
Subantarctic
biomass
chemical composition
crab
larval development
metamorphosis
Crustacea
Decapoda (Crustacea taxon)
Decapoda (Crustacea)
Invertebrata
Lithodidae
Lithodidae
Paralomis
Paralomis granulosa
Paralomis granulosa
description Changes in biomass and elemental composition (dry mass, W; carbon, C; nitrogen, N; hydrogen, H) were studied in the laboratory during complete larval and early juvenile development of the southern stone crab Paralomis granulosa (Jacquinot). At 6 ± 0.5°C; total larval development from hatching to metamorphosis lasted ca. 56 d, comprising 2 demersal zoeal stages and a benthic megalopa, with mean stage durations of 5, 11 and 45 d, respectively. All larval stages of P. granulosa are lecithotrophic, and first feeding and growth were consistently observed immediately after metamorphosis to the first juvenile crab stage. Regardless of presence or absence of food, W, C, N, and H decreased throughout larval development. Also the C:N mass ratio decreased significantly, from 7.2 at hatching to 4.2 at metamorphosis, indicating that a large initial lipid store remaining from the egg yolk was gradually utilised as an internal energy source. In total, about 68% of the initial quantities of C and H present at hatching, and 44% of N were lost during non-feeding larval development to metamorphosis. Approximately 10% of the initially present C, N and H were lost with larval exuviae, half of which was lost in the megalopa stage alone. Hence, metabolic biomass degradation accounted for losses of ca. 59% in C and H, but for only 33% in N, Most of the losses in C and H reflected metabolic energy consumption (primarily lipid degradation), while ca. 1/4 of the losses in N and 2/3 of those in W were due to larval exuviation. Complete larval lecithotrophy is based on an enhanced maternal energy investment per offspring, and on energy-saving mechanisms such as low larval locomotory activity and low exuvial losses. These traits are interpreted as bioenergetic adaptations to food-limited conditions in subantarctic regions, where a pronounced seasonality limits the period of primary production.
author Calcagno, Javier Angel
Lovrich, Gustavo Alejandro
author_facet Calcagno, Javier Angel
Lovrich, Gustavo Alejandro
author_sort Calcagno, Javier Angel
title Changes in biomass and chemical composition during lecithotrophic larval development of the southern stone crab Paralomis granulosa
title_short Changes in biomass and chemical composition during lecithotrophic larval development of the southern stone crab Paralomis granulosa
title_full Changes in biomass and chemical composition during lecithotrophic larval development of the southern stone crab Paralomis granulosa
title_fullStr Changes in biomass and chemical composition during lecithotrophic larval development of the southern stone crab Paralomis granulosa
title_full_unstemmed Changes in biomass and chemical composition during lecithotrophic larval development of the southern stone crab Paralomis granulosa
title_sort changes in biomass and chemical composition during lecithotrophic larval development of the southern stone crab paralomis granulosa
publishDate 2003
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01718630_v257_n_p189_Calcagno
http://hdl.handle.net/20.500.12110/paper_01718630_v257_n_p189_Calcagno
work_keys_str_mv AT calcagnojavierangel changesinbiomassandchemicalcompositionduringlecithotrophiclarvaldevelopmentofthesouthernstonecrabparalomisgranulosa
AT lovrichgustavoalejandro changesinbiomassandchemicalcompositionduringlecithotrophiclarvaldevelopmentofthesouthernstonecrabparalomisgranulosa
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