Results 91 to 100 of about 28,986 (305)

Nanoplastics: Methods, Exposure and Effects on Domestic, Farm and Wild Animals

open access: yesJournal of Applied Toxicology, EarlyView.
ABSTRACT Nanoplastics (NPs) are synthetic polymer particles ranging in size from 1 nm to 1 μm that have been identified as a major concern for ecosystems and organisms due to their plethora of negative effects. The aim of this review is to provide a comprehensive overview of the knowledge relating to exposure and effects of NPs in domestic (i.e., farm ...
B. De Felice   +8 more
wiley   +1 more source

Great hammerhead sharks swim on their side to reduce transport costs

open access: yesNature Communications, 2016
Sharks’ dorsal fins are thought to assist propulsion and turns while pectoral fins are thought to oppose sharks’ negative buoyancy. Here, Payne and colleagues show that hammerhead sharks use an exaggerated dorsal fin to generate lift by swimming on their
Nicholas L. Payne   +6 more
doaj   +1 more source

Born to be free? Assessing the viability of releasing captive-bred wobbegongs to restock depleted populations

open access: yesFrontiers in Marine Science, 2015
Large predatory fishes, such as sharks, play an important functional role within marine ecosystems. Restocking of depleted populations has been extensively studied for commercially or recreationally important teleost fish species; however, it has, to the
Kathryn Asha Lee   +4 more
doaj   +1 more source

Barremian and Aptian (Cretaceous) sharks and rays from Speeton, Yorkshire, north-east England

open access: yes, 2004
Bulk sampling of a number of horizons within the upper part of the Speeton Clay Type section has produced teeth and other remains of sharks and rays from several poorly studied horizons.
Underwood, Charlie J.
core   +1 more source

Finding Plankton: A Marine Science Scavenger Hunt for Local Communities

open access: yesLimnology and Oceanography Bulletin, EarlyView.
Abstract At a time of increasing political polarization and rapidly accelerating climate change, it is important to build public knowledge and empathy toward nature to foster behavioral changes; however, addressing a knowledge deficit can be insufficient to affect these changes.
Hannah M. Budroe, Holly M. Bik
wiley   +1 more source

Differentiation of Plant and Animal‐Derived Cholesterol Using irm‐13C NMR and IRMS

open access: yesMagnetic Resonance in Chemistry, EarlyView.
Determining and certifying the origin of ingredients, starting materials, and excipients used in manufactured goods like cosmetics and medicines can be difficult. In this report, we describe a robust approach for identifying the origin of cholesterol, a component of myriad consumer products using irm‐13C NMR and IRMS to differentiate plant versus ...
Anika M. Singh   +3 more
wiley   +1 more source

Population size and survivorship for juvenile lemon sharks (Negaprion brevirostris) on their nursery grounds at a marine protected area in Brazil

open access: yesNeotropical Ichthyology
Sharks face a number of obstacles for surviving their first several years of life and many species occupy nursery areas. Although estimates of survival, particularly for young age classes, are essential for assessing, monitoring and effectively managing ...
Renato Hajenius Aché de Freitas   +3 more
doaj   +1 more source

Drivers of change in human–wildlife relationships: Southern Africa as an example

open access: yesPeople and Nature, EarlyView.
Abstract Human–wildlife relationships (HWRs) are changing globally in response to shifts in ecological dynamics and societal values, often resulting in contestation. With an increasing need to enable human–wildlife coexistence, it is essential to better understand the drivers of change in HWRs.
Dian Spear
wiley   +1 more source

Movements and habitat use of satellite-tagged whale sharks off western Madagascar

open access: yesEndangered Species Research, 2018
Whale sharks Rhincodon typus, the world’s largest fish, are routinely sighted off the northwest coast of Madagascar, particularly off the island of Nosy Be. Dedicated whale shark tourism has been developing in the area since 2011.
Diamant, S   +6 more
doaj   +1 more source

Individual identification of sharks through dorsal fin: a new approach thanks to advances in computer science. Poster Abstract

open access: yes, 2018
The individual identification of the sharks of a population is the fundamental step to be taken if we want to conduct studies such as population estimates, behavioral evolution with age, hierarchy identification.
Cauteruccio, Francesco   +9 more
core  

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