Visual Observation to Identify Sexes in Subspecies of Adult Black Skimmers (Rynchops niger)
نویسندگان
چکیده
منابع مشابه
Birds of Two Oceans? Trans-Andean and Divergent Migration of Black Skimmers (Rynchops niger cinerascens) from the Peruvian Amazon
Seasonal flooding compels some birds that breed in aquatic habitats in Amazonia to undertake annual migrations, yet we know little about how the complex landscape of the Amazon region is used seasonally by these species. The possibility of trans-Andes migration for Amazonian breeding birds has largely been discounted given the high geographic barrier posed by the Andean Cordillera and the deser...
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CSG Action Plan: Availability of survey data: Moderate Need for wild population recovery: Low Potential for sustainable management: Moderate 2009 IUCN Red List: LR/cd (Least Risk, conservationdependent; reported to have undergone substantial recovery in several parts of its range. Recent surveys suggest that species remains widespread, locally abundant and extinction is unlikely; IUCN 2009) (la...
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Background: Since alkaloids are nitrogenous compounds, the availability of nitrogen (N) is expected to play an important role in the biosynthesis and accumulation of alkaloids in plants. Nitrogen has been found to increase the content of alkaloids in some of the medicinal plants. Objective: The aim of this study was to compare the effects of nitrogen bio-fertilizers, conventional nitrogen fe...
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متن کاملPrimed-burst potentiation in adult rat visual cortex in vitro
The effectiveness of θ pattern primed-bursts (PBs) on development of primed-burst (PB) potentiation was investigated in layer II/III of the adult rat visual cortex in vitro. Experiments were carried out in the visual cortical slices. Population excitatory post-synaptic potentials (pEPSPs) were evoked in layer II/III by stimulation of either white mater or layer IV. To induce long-term potenti...
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ژورنال
عنوان ژورنال: Waterbirds
سال: 2018
ISSN: 1524-4695,1938-5390
DOI: 10.1675/063.041.0207