Results 91 to 100 of about 41,831 (231)

Changes in size‐at‐age of juvenile Atlantic salmon cohorts over the past 50 years and linkages to environmental factors

open access: yesJournal of Fish Biology, EarlyView.
Abstract Quantifying the potential effects of climate change on juvenile salmonid body length at a large spatiotemporal scale is challenging given the multitude of biological processes and methodological constraints. In the present work, we analysed potential changes in size‐at‐age of juvenile Atlantic salmon cohorts over the past 50 years in the ...
Jean‐Michel O. Matte   +6 more
wiley   +1 more source

What Makes Complex Systems Complex? [PDF]

open access: yes, 2018
This paper explores some of the factors that make complex systems complex. We first examine the history of complex systems. It was Aristotle’s insight that how elements are joined together helps determine the properties of the resulting whole. We find (a)
Abbott, Russ
core  

The state of knowledge on four families of Syngnathoidei fishes (Teleostei: Syngnathiformes): Aulostomidae, Centriscidae, Fistulariidae and Solenostomidae

open access: yesJournal of Fish Biology, EarlyView.
Abstract Knowledge on the ecology and life‐history traits of coastal marine species is vital to inform their conservation and management, especially as their coastal habitats come under increasing threats. However, such data have never been collated for four of the five families in the suborder Syngnathoidei—the close relatives of the better‐studied ...
Syd J. Ascione   +3 more
wiley   +1 more source

Improving spine‐based age estimation in centrarchid fishes using otolith‐derived training sets

open access: yesJournal of Fish Biology, EarlyView.
Abstract Nonlethal age determination is a priority in fish biology contexts where sacrifice is restricted, but estimates derived from nonlethally attainable structures tend to suffer from poor precision and accuracy relative to necessarily lethal, otolith‐derived estimates.
Matthew P. Woo   +4 more
wiley   +1 more source

On boundaries and disciplines: constructing a set of key systems thinkers [PDF]

open access: yes, 2006
Over the past four years, the Open University has been working on an internal project of systems scholarship, called 'Systems Thinkers'. We have examined the life and work of fifty key thinkers, held discussions on their significance, and are in the ...
Ramage, Magnus, Shipp, Karen
core  

Die Allgemeine Systemtheorie bei Ludwig von Bertalanffy [PDF]

open access: yes, 2015
Die Wissenschaftsauffassung von Bertalanffy erwächst aus der Kontroverse zwischen mechanistischen und vitalistischen Positionen in der Biologie. Der reduktionistischen Position steht ein metaphysischer Ganzheitsansatz gegenüber. Bertalanffy, sowohl fasziniert von den Verfahren objektiver Wissenschaft als auch überzeugt von der Notwendigkeit eines ...
openaire   +2 more sources

Lake sturgeon (Acipenser fulvescens) growth and longevity estimated from adult capture–mark–recapture data

open access: yesJournal of Fish Biology, EarlyView.
Abstract Effective fishery management policy depends on accurate life‐history data, particularly for harvested species. Longevity is a core life‐history trait that is directly related to annual survival and lifetime reproductive potential, but fish longevity is generally not well documented, particularly for long‐lived species.
Edward A. Baker   +8 more
wiley   +1 more source

Biology and assessment of the painted sweetlips (Diagramma pictum (Thunberg, 1792)) and the spangled emperor (Lethrinus nebulosus (Forsskål, 1775)) in the southern Arabian Gulf [PDF]

open access: yes, 2006
The population biology and status of the painted sweeplips (Diagramma pictum) and spangled emperor (Lethrinus nebulosus) in the southern Arabian Gulf were established by using a combination of size-frequency, biological, and size-at-age data.
Al Abdessalaam, Thabit Z.   +3 more
core  

Endocrine‐Nutritional Synergy Between Sex Inversion and Microencapsulated Bioactives Enhances Growth, Intestinal Development, and Oxidative Stability in Nile Tilapia Larvae

open access: yesJournal of Animal Physiology and Animal Nutrition, EarlyView.
ABSTRACT This study evaluated the combined effects of sex inversion and microencapsulated supplementation with organic acids and essential oils on growth performance, tissue morphology, gene expression, and oxidative status in Nile tilapia (Oreochromis niloticus) larvae.
Jaísa Casetta   +11 more
wiley   +1 more source

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