...Jess MacPherson; Oliver N. Shipley; Alyssa M. Weinrauch; Geraldine Busquets-Vass; Seth D. Newsome; W. Gary Anderson ABSTRACT Nitrogen recycling and amino acid synthesis are two notable ways in which the gut microbiome can contribute to host metabolism, and these processes are especially important...

...J. Lisa Hoogenboom; W. Gary Anderson ABSTRACT Marine elasmobranchs are ureosmotic, retaining large concentrations of urea to balance their internal osmotic pressure with that of the external marine environment. The synthesis of urea requires the intake of exogenous nitrogen to maintain whole-body...

... absorption, as T. squamosa is known to conduct light-enhanced urea uptake to benefit the nitrogen-deficient zooxanthellae. * Author for correspondence ( [email protected] ) Competing interests The authors declare no competing or financial interests. 1 11 2018 5 3 2019 © 2019...

.... As the symbionts are nitrogen deficient, the host clam has to absorb exogenous nitrogen and supply it to them. This study aimed to demonstrate light-enhanced urea absorption in the fluted giant clam, Tridacna squamosa , and to clone and characterize the urea active transporter DUR3-like from its ctenidium (gill...

..., especially concerning heterotrophically acquired carbon and nitrogen. We combined physiological measurements and pulse-chase isotopic labeling of heterotrophic carbon and nitrogen, as well as autotrophic carbon to track nutrient fluxes in two coral species, Stylophora pistillata and Turbinaria reniformis...

... into proteins, kept in the coral tissue). The δ 15 N signatures of the ammonium-enriched symbionts and host tissue were also significantly decreased, by 4 and 2‰, respectively, compared with the non-enriched conditions, suggesting a significant uptake of inorganic nitrogen by the holobiont. Under thermal stress...

... and revealed constant uptake rates for particulate organic carbon (POC) (−0.315±0.161 mg POC m −2 coral surface area h −1 ), particulate nitrogen (PN) (−0.053±0.018 mg PN m −2 h −1 ) and dissolved organic carbon (DOC) (−4.8±2.1 mg DOC m −2 h −1 ). Although DOC uptake significantly increased in the N treatment...

..., which has not been well studied in large ectotherms. We report the incorporation of carbon and nitrogen into the tissues of leopard sharks ( Triakis semifasciata ). Because sharks have relatively slow metabolic rates and are difficult to maintain in captivity, no long-term feeding study has been...

[email protected] ) 2 11 2008 2009 aerobic dive limit blood sampler emperor penguin hemoglobin lactate nitrogen oxygen electrode oxygen store shunt The concept of an aerobic dive limit (ADL) is central to most eco-physiological models of foraging behavior in marine mammals...

... it can be confronted with aerial exposure during the dry season. This study aimed to examine nitrogen excretion and metabolism in this fish during 4 days of emersion. Contrary to previous reports, A. testudineus does not possess a functional hepatic ornithineurea cycle because no carbamoyl phosphate...

...Adele J. Pile; Adrienne Grant; Rosalind Hinde; Michael A. Borowitzka SUMMARY Grazing on ultraplankton by the sponge partner of an invertebrate/algal symbiotic association can provide enough particulate organic nitrogen to support the nitrogen needs of both partners. The previously unknown natural...

...Brent W. Murray; Ellen R. Busby; Thomas P. Mommsen; Patricia A. Wright SUMMARY Glutamine synthetase (GSase) is a key enzyme in nitrogen metabolism and encoded by a single gene in mammals. Using PCR cloning techniques, including RT-PCR from total RNA and PCR from a cDNA library, we find evidence...

...Lizanne Roxburgh; Berry Pinshow SUMMARY Most aquatic vertebrates are ammonotelic, whereas terrestrial vertebrates are typically uricotelic or ureotelic. However, the principal form of nitrogenous waste product in the urine of an animal may vary, depending on environmental conditions. Anna's...

...Patricia A. Wright ABSTRACT There are diverse physiological functions of nitrogen end products in different animal groups, including excretion, acid–base regulation, osmoregulation and buoyancy. Animals excrete a variety of nitrogen waste products, but ammonia, urea and uric acid predominate...