Temporal habitat partitioning and resource competition between congenerics: Testing for density-dependent growth and mortality in estuarine shrimp.

Habitat partitioning can promote coexistence of closely related competitors. Two congeneric shrimps (brown shrimp, Penaeus aztecus, and white shrimp, Penaeus setiferus) which utilize estuaries in the southeastern U.S.

Linking Foraging Behaviour and Habitat Preferences During Moult Across Multiple Populations of Red-Throated Diver.

Understanding the habitat use of individuals can facilitate methods to measure the degree to which populations will be affected by potential stressors. Such insights can be hard to garner for marine species that are inaccessible during phases of their annual cycles. Here, we quantify the link between foraging habitat and behaviour in an aquatic bird of high conservation concern, the red-throated diver () across three breeding populations (Finland, Iceland and Scotland) during their understudied moult period.

Using National IVF Registries to Validate Clinical Outcomes Following IVF Covered by Health Insurance.

Objective: To evaluate in vitro fertilization (IVF) cycles covered by health insurance using a national commercial claims database and to validate key clinical events against national IVF registries.

Design: Retrospective cohort study SUBJECTS: US women aged 20-44 who underwent IVF from 2005 to 2020 in Optum's de-identified Clinformatics® Data Mart Database (CDM).

Exposure: Undergoing IVF MAIN OUTCOME MEASURES: IVF cycles and rates of pregnancies (inclusive of losses and terminations), live births, and live birth types (e.

Identification of fossil juniper seeds from Rancho La Brea (California, USA): drought and extirpation in the Late Pleistocene.

Juniperus spp. are keystone shrubs in western North America and important climatic indicators in paleo-records. However, a lack of taxonomic resolution among fossil species limits our ability to track past environmental changes.

Measurement of 1,25-dihydroxyvitamin D in serum by LC-MS/MS compared to immunoassay reveals inconsistent agreement in paediatric samples.

Objectives: Automated immunoassays for 1,25-dihydroxyvitamin D (1,25(OH)D) have increased the use of serum measurements in clinical and research settings, but disagreement with LC-MS/MS methods remains an issue.

Methods: In this study, we examined this problem using samples obtained from healthy young adults, n=80, mean age 21.7 (18-32) years, and a large cohort of paediatric samples, n=422, mean age 7.