Larval energy metabolism and physiological variability in the Asian shore crab Hemigrapsus sanguineus
2001; Inter-Research; Volume: 218; Linguagem: Inglês
10.3354/meps218303
ISSN1616-1599
AutoresAG Marsh, Sara Cohen, CE Epifanio,
Tópico(s)Physiological and biochemical adaptations
ResumoMEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 218:303-309 (2001) - doi:10.3354/meps218303 Larval energy metabolism and physiological variability in the Asian shore crab Hemigrapsus sanguineus Adam G. Marsh*, Sahrye Cohen**, Charles E. Epifanio College of Marine Studies, University of Delaware, Lewes, Delaware 19958, USA *E-mail: amarsh@udel.edu **Present address: Department of Biology, Tufts University, Medford, Massachusetts 02155, USA ABSTRACT: Larvae of the Asian shore crab Hemigrapsus sanguineus were reared in the laboratory during zoeal development (Stages I to V, ~15 d at 25°C and 30" S). Measurements of respiration rates, lactate dehydrogenase activity (LDH) and total protein content were made daily on individual larvae (n = 181) in order to assess the level of individual variance in energy metabolism during development. On average, zoeal development in H. sanguineus was estimated to require 43.8 J of metabolic energy to reach a megalope stage; however, the level of individual variance in metabolic rates resulted in a range of 23.8 to 67.9 J (~3-fold difference). LDH specific activities also evidenced a wide range in individual values during development (12 to 785 µU µg-1 protein). Although respiration rates were correlated with LDH specific activity (r2 = 0.628), it is more interesting to note the negative correlation between the variance in these measurements (r2 = 0.796), indicating a substantial degree of individual differences in metabolic activities among these larvae. At present, phenotypic variations in physiological rate processes are not considered in life-history models of larval development, which could be an important variable determining the survival and dispersal of a larval cohort. KEY WORDS: Larvae · Physiology · Life history · Hemigrapsus sanguineus · Lactate dehydrogenase · Respiration Full text in pdf format PreviousExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 218. Online publication date: August 20, 2001 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2001 Inter-Research.
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