Energy content of macrobenthic invertebrates: general conversion factors from weight to energy

Brey, Thomas; Rumohr, Heye; Ankar, Sven

doi:10.1016/0022-0981(88)90062-7

Cited by 137 publications

(92 citation statements)

References 17 publications

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“…A representative energy content of organic matter (ash-free dry tissue), based on analysis of 255 (229 species) aquatic invertebrates, is 23 kJ g -1 (Brey et al 1988). It is unlikely that the composition of organic matter in vertebrates is sufficiently different to invalidate the use of this value for dinosaurs.…”

Section: : Growthmentioning

confidence: 99%

Dinosaur Energetics: Setting the Bounds on Feasible Physiologies and Ecologies

Clarke

2013

The American Naturalist

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The metabolic status of dinosaurs has long been debated but remains unresolved as no consistent picture has yet emerged from a range of anatomical and isotopic evidence. Quantitative analysis of dinosaur energetics, based on general principles applicable to all vertebrates, shows that many features of dinosaur lifestyle are compatible with a physiology similar to that of extant lizards, scaled up to dinosaur body masses and temperatures. Sufficient metabolic scope would have been available to support observed dinosaur growth rates and allow considerable locomotor activity, perhaps even migration. Since at least one dinosaur lineage evolved true endothermy, this analysis emphasises that there was no single dinosaur physiology. Many small theropods were insulated with feathers and appear to have been partial or full endotherms. Uninsulated small taxa, and all juveniles, would presumably have been ectothermic, with consequent diurnal and seasonal variations in body temperature. In larger taxa inertial homeothermy would have resulted in warm and stable body temperatures, but with a basal metabolism significantly below that of living mammals or birds of the same size. It would appear that dinosaurs exhibited a range of metabolic levels to match the broad spectrum of ecological niches they occupied.

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Section: : Growthmentioning

confidence: 99%

Dinosaur Energetics: Setting the Bounds on Feasible Physiologies and Ecologies

Clarke

2013

The American Naturalist

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“…Therefore, ash-free, shell-free dry mass (AFDM) of preserved yellow clams was recorded throughout the sampling time as an estimator of specimens' condition, whereby the conversion factor of 0.186 was empirically determined according to Brey et al (1988).…”

Section: Condition Index Biomass and Recruitmentmentioning

confidence: 99%

Reproductive cycle and gonad development of the Northern Argentinean Mesodesma mactroides (Bivalvia: Mesodesmatidae)

et al. 2009

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The reproductive cycle and gonad development of the yellow clam Mesodesma mactroides was studied over a period of 24 months (January 2005-December 2006 at the Argentinean sandy beach Santa Teresita. Histological examination of gonadal tissue revealed that sex ratios did not significantly deviate from the proportion of 1:1 and no case of hermaphroditism was found. The reproductive cycle of M. mactroides followed an annual cyclicality, which was significantly correlated to monthly mean sea surface temperatures (SST). Oocytes showed highest abundance in winter, indicating a process of gonadal development and sexual maturation. The mean oocyte size decreased significantly during spring. Modal oocyte sizes decreased significantly during winter and late spring of each year, suggesting spawning events. The condition index was not useful in describing the annual reproductive cycle of M. mactroides. Ash-free, shell-free dry mass was chosen to detect the condition of the specimens, and this significantly correlated with monthly mean SST and the gametogenic cycle. Annual recruitment patterns during summer-autumn indicated a 3-month-long planktonic phase of M. mactroides. The reproduction cycle and gonad development of M. mactroides showed only weak differences between data from the present study and those collected 40 years ago.

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“…AFDM was determined for 400 specimens of all size classes between January and December 1998. For comparisons, all published values were converted to AFDM according to Brey, Rumohr, and Ankar (1988).…”

Section: Study Site and Samplingmentioning

confidence: 99%

Population structure, growth and production of the surf clam Donax serra (Bivalvia, Donacidae) on two Namibian sandy beaches

Laudien

Brey

Arntz

2003

Estuarine, Coastal and Shelf Science

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Population structure, growth and production of the surf clam Donax serra (Bivalvia, Donacidae), inhabiting highly exposed sandy beaches of Namibia, were investigated between November 1997 and December 1999. From length-frequency distribution and tagging-recapture data, a von Bertalanffy growth function with an asymptotic length (L 1 ) of 82 mm and a growth constant (K) of 0.274 yr ÿ1 was established. Regarding growth performance of Donacidae, D. serra fits in a group of species inhabiting cold temperate and upwelling regions. The intertidal biomass of the studied population ranged between 141 and 546 g ash-free dry mass (AFDM) m ÿ2 yr ÿ1 . Individual production was maximal at 56.5 mm shell length (0.83 g AFDM ind. ÿ1 yr ÿ1 ), and annual production ranged between 167 and 637 g AFDM m ÿ2 yr ÿ1 , resulting in productivity values ðP=B Þ between 1.167 and 1.589 yr ÿ1 . These data underline the importance of D. serra for the beach/surf ecosystem. Further, the findings of this study are crucial to support future aquaculture or exploitation activities and management.

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Energy content of macrobenthic invertebrates: general conversion factors from weight to energy

Cited by 137 publications

References 17 publications

Dinosaur Energetics: Setting the Bounds on Feasible Physiologies and Ecologies

Dinosaur Energetics: Setting the Bounds on Feasible Physiologies and Ecologies

Reproductive cycle and gonad development of the Northern Argentinean Mesodesma mactroides (Bivalvia: Mesodesmatidae)

Population structure, growth and production of the surf clam Donax serra (Bivalvia, Donacidae) on two Namibian sandy beaches

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