Results 121 to 130 of about 190,110 (296)

Biomass estimates of Pacific herring, Clupea pallasi, in California from the 1991-92 spawning-ground surveys [PDF]

, 1992
The spawning biomass of Pacific herring, Clupea pallasi, estimated from spawning-ground surveys in San Francisco Bay declined to 41,000 tons this season.
Collier, Patrick, Moore, Thomas O., Spratt, Jerome D.   +2 more
core  

Strategies for Assessing Post‐Wildfire Geomorphic Resilience in Semiarid Rivers

River Research and Applications, EarlyView.
ABSTRACT We review and summarize diverse components of a catchment that can be monitored after wildfire to assess the geomorphic resilience of the river corridor in semiarid regions. We distinguish upland portions of river catchments from river corridors.
Ellen Wohl, Shayla Triantafillou, Alex Thornton‐Dunwoody, Connor Mertz, Katie Larkin, William Keenan, Steven Griffin, Dylan Davis, Lindsey Blehm   +8 more
wiley   +1 more source

Spatiotemporal Assessment of Groundwater Interactions With a Regulated River: A Case Study of the Nechako River, Canada

River Research and Applications, EarlyView.
ABSTRACT Regulated rivers represent complex hydrological systems where groundwater–surface water interactions are governed by natural conditions and human interventions. This study investigates the spatiotemporal dynamics of groundwater–surface water exchanges in the Nechako River, British Columbia (Canada), using numerical simulations.
Milad Fakhari, John Gray, Avery Dextrase, Andre St‐Hilaire, Richard Martel   +4 more
wiley   +1 more source

Comportamiento reproductivo del pez Opistognathus rosenblatti (Perciformes: Opistognathidae) en cautiverio Reproductive behavior of Opistognathus rosenblatti (Perciformes: Opistognathidae) in captivity

Revista de Biología Tropical, 2012
El bocón manchas azules O. rosenblatti, es una especie endémica del Golfo de California con un elevado valor comercial, del cual existe poca información referente a su biología.
Mauricio Contreras, Benjamín Anguas, Pedro G. González, Rodolfo E. Martínez   +3 more
doaj  

Nassau grouper (Epinephelus striatus) spawning aggregations: hydroacoustic surveys and geostatistical analysis [PDF]

, 2006
With the near extinction of many spawning aggregations of large grouper and snapper throughout the Caribbean, Gulf of Mexico, and tropical Atlantic, we need to provide baselines for their conservation.
Eggleston, David B., Rand, Peter S., Taylor, J. Christopher   +2 more
core  

Geolocated fish spawning habitats

Scientific Data
AbstractFish spawning locations are a crucial input into fisheries management and conservation plans, and many stocks are especially sensitive to the environmental conditions within these localized zones. Globally collated data on spawning locations across many species has been unavailable, hindering global stock assessments and analyses of sustainable
Kimberly L. Oremus, James Rising, Nandini Ramesh, Audrey J. Ostroski   +3 more
openaire   +3 more sources

Potential Impacts of Low Flows on Fish Foodscapes and Production in a Braided River

River Research and Applications, EarlyView.
ABSTRACT Changes in river discharge affect the physical composition and connectivity of habitats which, in turn, may shape the spatial distribution of fish food abundance, accessibility and quality—the ‘foodscape’—of river ecosystems. However, the influence of river flows on fish foodscapes has received very little attention from scientists. We studied
Rick J. Stoffels, Richard S. A. White, Gergely T. Torok, Richard J. Measures, Kristy L. Hogsden, Alex F. Rose, Paul W. Lambert, Jaret P. Bilewitch, S. Elizabeth Graham, Lisa Smith, Amber R. Brooks, Brian J. Smith   +11 more
wiley   +1 more source

Environmental DNA reveals the ecology and seasonal migration of a rare sturgeon species in the Ural River

Environmental DNA
Environmental DNA (eDNA) technology is an essential tool for monitoring living organisms in ecological research. The combination of eDNA methods with traditional methods of ecological observation can significantly improve the study of the ecology of rare
Gulmira Abileva, Ainur Turzhanova, Aizhan Zhamangara, Oxana Khapilina, Ruslan Kalendar   +4 more
doaj   +1 more source

The Impact of Increasing Seawater Temperatures over the Last 30 Years on the Reproductive Cycle of the Pearl Oyster Pinctada radiata (Leach, 1814) in the Arabian Gulf

Journal of Marine Science and Engineering
The pearl oyster Pinctada radiata (Leach, 1814), a crucial ecosystem builder in the Arabian Gulf, has experienced a significant decline, mainly attributed to anthropogenic pressures. This study aimed to characterize the reproductive cycle of P.
Razan Khalifa, Radhouane Ben Hamadou, Bruno Welter Giraldes, Sandra Joaquim, Zainab Hizam, Shafeeq Hamza, Anne Bassères, Jean-Charles Massabuau, Alexandra Leitão   +8 more
doaj   +1 more source

Coral spawning information [PDF]

Information on reproduction in reef corals is presented. An understanding of its reproductive behaviour is an important factor in helping to preserve the coral reef ecosystems.Coral reefs ...
Noordeloos, M., Oliver, J., Yusuf, Y.
core