Results 101 to 110 of about 146,983 (353)

Mean sze of the landed catch: a fishery community index for trend assessment in exploited marine ecosystems [PDF]

, 2019
Based on fisheries landings data I propose the size-base index (community level) Mean Size of the Landing Catch (MSL). The MSL index was estimated based on high taxonomic resolution data available from auctions (species level) and demographic data ...
Antonakakis, Cardinale, Cheung, Colloca, Conover, De Roos, Frank, Froese, Froese, Garcia, Goodyear, Hidalgo, Hsieh, Karydis, Leitão, Leitão, Maynou, Morato, Pauly, Pauly, Ricker, Rogers, Shin, Shin   +23 more
core   +1 more source

A perspective from the Mesozoic: Evolutionary changes of the mammalian skull and their influence on feeding efficiency and high‐frequency hearing

The Anatomical Record, EarlyView.
Abstract The complex evolutionary history behind modern mammalian chewing performance and hearing function is a result of several changes in the entire skeletomuscular system of the skull and lower jaw. Lately, exciting multifunctional 3D analytical methods and kinematic simulations of feeding functions in both modern and fossil mammals and their ...
Julia A. Schultz
wiley   +1 more source

Monitoring the trophic status of reservoirs

, 1987
The current situation of regional, rather' than national, problems of eutrophication in standing waters has been widely aired in recent reports. A reliable, quantitative data base is a prerequisite to future trend monitoring, a concensus view of those reports. The objective of this report is to establish requirements, methodology and a minimal data set
Hilton, J., Carrick, T.R., Rigg, E., Lishman, J.P., George, D.G., Hewitt, D.   +5 more
openaire   +1 more source

Trophic status of Limboto lake in Gorontalo Province

IOP Conference Series: Materials Science and Engineering, 2019
Abstract Limboto Lake were on the worried condition now. It happened because of the process depreciation and sedimentation which caused by sedimentation and waste ground that threaten the existence of ecosystem in the future. The purpose of the research is to determine trophic status of Limboto Lake in Gorontalo Province. Measurements of
openaire   +1 more source

Application of LANDSAT to the surveillance of lake eutrophication in the Great Lakes basin [PDF]

The author has identified the following significant results. A step-by-step procedure for establishing and monitoring the trophic status of inland lakes with the use of LANDSAT data, surface sampling, laboratory analysis, and aerial observations were ...
Adams, M. S., Gannon, J. E., Rogers, R. H., Scherz, J. P., Smith, V. E., Woelkerling, W. J.   +5 more
core   +1 more source

Legacy pollutants are declining in Great Skuas (Stercorarius skua) but remain higher in Faroe Islands than in Scotland [PDF]

, 2016
To monitor environmental pollutants in Faroese biota, samples from a top predator were analysed and put into a spatial and temporal context. Analysis of 20 Great Skua eggs sampled in 2012 from the Faroe Islands showed >70 % lower concentrations of ...
Alonso, Sarah, Dam, Maria, Furness, Robert W., Hammer, Sjurdur, McGill, Rona A.R., Nager, Ruedi G.   +5 more
core   +2 more sources

Comparative and functional anatomy of masticatory muscles and bite force in opossums (Didelphimorphia, Didelphidae)

The Anatomical Record, EarlyView.
We describe the functional anatomy of masticatory muscles in nine opossums, finding a generalized anatomical pattern with differences related to skull morphology. Variation in quantitative myological data and estimated bite force was mostly related to size, and the increase in bite force supports dietary diversification associated with size increase ...
Juann A. F. H. Abreu, Diego Astúa
wiley   +1 more source

Hypertrophic phytoplankton: an overview [PDF]

, 1992
An overview is provided of studies on hypertrophic phytoplankton in order to explore the subject and to suggest uncovered areas of research in this increasingly important theme.
Cobelas, Miguel Alvarez, Jacobsen, Bodil A.   +1 more
core  

Zooplankton-based assessment of the trophic state of a tropical forest river in Nigeria [PDF]

, 2009
In this study, we explore the usefulness of zooplankton as a tool for assessing the trophic status of a Nigerian forest river. The river was sampled monthly and investigated for water physico-chemistry and zooplankton community structure using basic ...
Adeyinka M.L., Imoobe T.O.T.
core   +1 more source

The lower jaw of Devonian ray‐finned fishes (Actinopterygii): Anatomy, relationships, and functional morphology

The Anatomical Record, EarlyView.
Abstract Actinopterygii is a major extant vertebrate group, but limited data are available for its earliest members. Here we investigate the morphology of Devonian actinopterygians, focusing on the lower jaw. We use X‐ray computed tomography (XCT) to provide comprehensive descriptions of the mandibles of 19 species, which span the whole of the Devonian
Ben Igielman, Rodrigo Tinoco Figueroa, Robert R. Higgins, Stephanie E. Pierce, Michael I. Coates, Emily M. Troyer, Vincent Fernandez, Kathleen Dollman, Jing Lu, Min Zhu, Matt Friedman, Sam Giles   +11 more
wiley   +1 more source