geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Inter habitat movements by sanderlings calidris alba in relation to foraging profitability and the tidal cycle


, : Inter habitat movements by sanderlings calidris alba in relation to foraging profitability and the tidal cycle. Auk 98(1): 49-64

Sanderlings (C. alba) wintering near Bodega Bay, California [USA] move between outer coast sandy beaches and nearby harbor sandflats on a regular tidal schedule. Birds forage on outer beaches at high and mid-level tides, switching to the protected sandflats as the tide recedes; Sanderling density fluctuations measured along transects were complementary in these 2 habitats. The habitat time budget of the local sanderling population varied between days with different tidal regimes, averaging 45% of daylight hours spent on beaches during Nov. 1976. Some sanderlings defended territories on the beaches, while other foraged in flocks; both groups moved to the lagoon tidal flats at low tide. The density of sanderling prey in the 2 habitats changed through the tidal cycle in foraging sites used by sanderlings. On harbor sandflats, energy density increased sharply with falling tide level. On outer beaches, energy density was highest at middle and upper tidal levels, decreasing at low and at very high tides. Possibly, sanderlings switch feeding sites on a tidal schedule to maximize foraging efficiency. A simple graphical model based on tide-related changes in foraging efficiency is offered to explain the shifts in habitat use. Sanderling behavior under seasonally varying prey conditions and behavioral comparisons of territorial and nonterritorial birds are consistent with the model.

US$29.90


Other references

Uemura, R.; Abe, O.; Motoyama, H., 2009: A calculational procedure for determining17 O/16 O ratio in water by an equilibration method. Geochimica et Cosmochimica Acta 73.13S: A1358

Kovacik L.; Jezek L.; Mrazova E.; Veselovsky J., 1988: Effect of pilocarpine on posterior uvea of bovine eye. The instillation of high dose of 3% aqueous solution of pilocarpine into bovine conjunctiva leads to the increase of cholinergic activity of chorioid at the level of 0.05 .mu.g of the standard acetylcholine. Penetrating pilocarpine interacts with...

Sun, Y-Feng.; Liu, S-Bo.; Meng, F-Li.; Liu, J-Yun.; Jin, Z.; Kong, L-Tao.; Liu, J-Huai., 2012: Metal oxide nanostructures and their gas sensing properties: a review. Metal oxide gas sensors are predominant solid-state gas detecting devices for domestic, commercial and industrial applications, which have many advantages such as low cost, easy production, and compact size. However, the performance of such sensor...

Hosoya, T.; Sasaki, T.; Hashimoto, H.; Sakamoto, R.; Ohashi, T., 2016: Clinical efficacy and safety of topiroxostat in Japanese male hyperuricemic patients with or without gout: an exploratory, phase 2a, multicentre, randomized, double-blind, placebo-controlled study. In Japan, although topiroxostat, a selective xanthine oxidoreductase inhibitor, has been used for the treatment of patients with hyperuricemia including gout, no published randomized controlled studies evaluating the dose-dependent relationship wi...

Miguelez, C.; Berrocoso, E.; Mico, J.A.; Ugedo, L., 2013: L-DOPA modifies the antidepressant-like effects of reboxetine and fluoxetine in rats. Nowadays the most widely used antidepressants are selective serotonin reuptake inhibitors (SSRI) or noradrenaline reuptake inhibitors (NRI), however, these take four to eight weeks to exert their effects and each drug is efficacious only in 60 70%...

Hayakawa, E.H.; Rossetti, D.F., 2015: Late quaternary dynamics in the Madeira River basin, southern Amazonia (Brazil), as revealed by paleomorphological analysis. Ancient drainage systems are being increasingly documented in the Amazon basin and their characterization is crucial for reconstructing fluvial evolution in this area. Fluvial morphologies, including elongate belts, are well preserved along the Ma...

Franti, C.E.; Connolly, G.E.; Riemann, H.P.; Behymer, D.E.; Ruppanner, R.; Willadsen, C.M.; Longhurst, W., 1975: A survey for Toxoplasma gondii antibodies in deer and other wildlife on a sheep range. Blood samples were obtained from native mammals and birds on a sheep range (Hopland Field Station) in northern California. Serum samples were tested for antibodies to Toxoplasma gondii by the indirect haemagglutination test. Of 382 deer that were...

Harrap G.J., 1968: Enz glycoside hydrolases in human whole saliva abstract bacteria mono saccharide degradation alpha or beta linkage. Journal of Dental Research 47(6 PART 1): 984

Smith, G.; Wermuth, U.D.; Healy, P.C., 2007: Proton-transfer compounds of 8-hydroxy-7-iodoquinoline-5-sulfonic acid (ferron) with 4-chloroaniline and 4-bromoaniline. The crystal structures of the proton-transfer compounds of ferron (8-hydroxy-7-iodoquinoline-5-sulfonic acid) with 4-chloroaniline and 4-bromoaniline, namely 4-chloroanilinium 8-hydroxy-7-iodoquinoline-5-sulfonate monohydrate, C(6)H(7)ClN(+) x C(9...

Shah, N.K.; Wagner, J.; Santos, G.; Griffin, C.A., 1992: Karyotype at relapse following allogeneic bone marrow transplantation for chronic myelogenous leukemia. Eighty-four patients underwent allogeneic or syngeneic bone marrow transplantation as therapy for chronic myelogenous leukemia (CML) during a 5-year period at The Johns Hopkins Oncology Center. We describe the karyotype at relapse in 19 patients w...