Results 61 to 70 of about 27,450 (224)

Modification of the biological intercept model to account for ontogenetic effects in laboratory-reared delta smelt (Hypomesus transpacificus)* [PDF]

, 2007
We investigated age, growth, and ontogenetic effects on the proportionality of otolith size to fish size in laboratory-reared delta smelt (Hypomesus transpacificus) from the San Francisco Bay estuary.
Baskerville-Bridges, Bradd, Bennett, William A., Burton , Jessica, Hobbs, James A.   +3 more
core  

The making of pure quartzose sand in continental interiors: Paraná River (Brazil and Argentina)

Sedimentology, Volume 73, Issue 3, Page 802-837, April 2026.
ABSTRACT As part of a comprehensive project on sedimentary processes in South America, this study focuses on sediment generation in the intracratonic Paraná Basin and monitors the evolution of sand composition along the Paraná River from central Brazil to the Río de la Plata estuary in Argentina.
Eduardo Garzanti, Marta Barbarano, Mara Limonta, Guido Pastore, Pieter Vermeesch, Giovanni Vezzoli   +5 more
wiley   +1 more source

The Delta as Changing Landscapes

San Francisco Estuary and Watershed Science, 2016
doi: http://dx.doi.org/10.15447/sfews.2016v14iss2art9What happens at one place in a landscape influences and is influenced by what happens in other places. Consequently, management and restoration that focus on individual places may fail to recognize and
John Wiens, Letitia Grenier, Robin Grossinger, Michael Healey   +3 more
doaj  

Spatial and seasonal relationships between Pacific harbor seals (Phoca vitulina richardii) and their prey, at multiple scales [PDF]

, 2009
Knowing where pinnipeds forage is vital to managing and protecting their populations, and for assessing potential interactions with fisheries. We assessed the spatial relationship between the seasonal distribution of Pacific harbor seals (Phoca vitulina
Allen, Sarah G., Elliott-Fisk, Deborah L., Green, Deborah E., Grigg, Emma K., Klimley, A. Peter, Markowitz, Hal   +5 more
core  

Golden Gate Bridge, as Always? Eliciting Prototypical Places From Autoregressive Large Language Models via Category Production

Transactions in GIS, Volume 30, Issue 2, April 2026.
ABSTRACT Among the various theories of categorization, Eleanor Rosch's prototype theory stands out as both influential and contested. In contrast to the classical theory of concepts, prototype theory posits that humans conceptualize the world using category structures where exemplars vary in their degree of membership.
Zilong Liu, Krzysztof Janowicz, Mina Karimi, Meilin Shi, Ivan Majic, Alexandra Fortacz‐Lazan   +5 more
wiley   +1 more source

Will Tidal Wetland Restoration Enhance Populations of Native Fishes?

San Francisco Estuary and Watershed Science, 2003
Restoration of tidal wetlands might enhance populations of native fishes in the San Francisco Estuary of California. The purpose of this paper is to: (1) review the currently available information regarding the importance of tidal wetlands to native ...
Larry R. Brown
doaj  

Contrasting migratory chronology and routes of Lesser Scaup: implications of different migration strategies in a broadly distributed species

Journal of Field Ornithology
Migration allows birds to improve fitness by exploiting seasonal resource peaks and avoiding limitations. Migration strategies may differ among individuals within a species, but for all strategies, the benefit of increased fitness should outweigh the ...
Laurie A. Hall, Christopher J. Latty, Jeffrey M. Warren, John Y. Takekawa, Susan E. W. De La Cruz   +4 more
doaj   +1 more source

The effects of scientific uncertainty and values trade‐offs on flow management decisions for an endangered fish

Ecosphere, Volume 17, Issue 3, March 2026.
Abstract Consumptive use of freshwater is of concern in many estuarine ecosystems, and various frameworks have been used to prescribe environmental flows to benefit native species. However, few of these frameworks explicitly examine the potential trade‐offs between socioeconomic and conservation‐oriented values.
Brian Mahardja, William E. Smith, Brian D. Healy, Cameron Koizumi, Matthew L. Nobriga, Shawn Acuña, Brian Crawford, Kristin K. Arend, Michael C. Runge   +8 more
wiley   +1 more source

New observations and corrections concerning the trio of invasive hydromedusae Maeotias marginata (=M. inexpectata), Blackfordia virginica, and Moreisia sp. in the San Francisco Estuary

Scientia Marina, 2000
New observations of Maeotias, Blackfordia, and Moerisia in low salinity waters of the San Francisco Bay estuary allow better understanding of the life cycles and natural history of these three genera of invading hydrozoans.
Claudia Mills, John T. Rees
doaj   +1 more source

Delineating incised stream sediment sources within a San Francisco Bay tributary basin [PDF]

Earth Surface Dynamics, 2016
Erosion and sedimentation pose ubiquitous problems for land and watershed managers, requiring delineation of sediment sources and sinks across landscapes.
P. Bigelow, L. Benda, S. Pearce
doaj   +1 more source