Results 51 to 60 of about 241,574 (228)

Photoperiodic Stimulation of Egg Laying in the Land Snail Helix aspersa [PDF]

Nature, 1966
WE report here early results of an investigation of the relation between photoperiod and various aspects of the physiology and reproduction of the land snail, Helix aspersa. It was suggested recently that maturation of gametes may be initiated by annual temperature fluctuations and is perhaps correlated with changes in illumination. There does not seem
GWEN J. STEPHENS, GROVER C. STEPHENS
openaire   +1 more source

Latitudinal effect on the structure of snake–prey interaction networks is mediated by snake species richness

Ecography, EarlyView.
Despite the growing number of studies on trophic networks in recent decades, there are still important gaps in our understanding of how these networks are structured across broad environmental gradients. These gaps are even greater in some groups of terrestrial vertebrates, such as snakes, requiring a cohesive synthesis of their broader trophic ...
Daniela Pinto‐Coelho, Kate P. Maia, Laura R. V. Alencar, Marcio Martins, Paulo R. Guimarães   +4 more
wiley   +1 more source

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

Journal 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, M. Bertazzo, A. F. Tabaran, M. Parolini, R. P. Popa, A. Pintea, L. J. Spicer, A‐L. Nagy, F. Caloni   +8 more
wiley   +1 more source

The importance of wild meat and freshwater fish for children's nutritional intake in the Congo Basin

People and Nature, EarlyView.
Abstract Wild meat and freshwater fish are widely consumed in the Congo Basin, but in some areas, they are at risk of disappearing due to unsustainable hunting and fishing and changes in their habitat. Wild meat is also at risk of being eliminated from local diets due to potential policy changes such as wild meat bans.
Amy Ickowitz, Muhammad Faisal Pratama, Mahdiyatur Rahmah, Caleb Yengo Tata, Erasmus Nchuaji Tang, Judith Laure Ngondi, Victor Buhendwa Mirindi   +6 more
wiley   +1 more source

Fig. 4 in SNAIL - an interactive computer program for the determination of Central European freshwater gastropods

, 2017
Fig. 4: Key offered by thee computer proogram SNAIL for determiningg the family oof the Lymnaeidae.Published as part of Sturm, Robert & Snail, 2017, SNAIL - an interactive computer program for the determination of Central European freshwater gastropods ...
Snail, Sturm, Robert
core   +1 more source

The Late Agricultural Development of Central Arabian Oases—Archaeobotanical and Archaeozoological Studies of the al‐Kharj Oasis

Arabian Archaeology and Epigraphy, EarlyView.
ABSTRACT While oasis settlements emerged during the Bronze Age in Eastern and Northern Arabia, the settlement process in Central Arabia was different. Excavations at al‐Yamāma—main ancient settlement of the al‐Kharj oasis (Riyadh Province, KSA)—suggest that the latter did not emerge before the second half of the first millennium BCE.
Elora Chambraud, Hervé Monchot, Vladimir Dabrowski, Charlène Bouchaud, Jérémie Schiettecatte   +4 more
wiley   +1 more source

Sperm Head–Tail Coupling Apparatus Diversity and Common Themes Among Species

Andrology, EarlyView.
ABSTRACT Background A stable connection between the sperm head (containing the nucleus and acrosome) and tail (containing the axoneme, mitochondrial sheath, and periaxonemal structures) is critical for fertility. This connection is mediated by a series of nuclear, cytoplasmic, and centriole components that make up the head–tail coupling apparatus (HTCA)
Danielle B. Buglak, Brian J. Galletta, Nasser M. Rusan   +2 more
wiley   +1 more source

SNAIL - an interactive computer program for the determination of Central European freshwater gastropods

, 2017
Sturm, Robert, Snail (2017): SNAIL - an interactive computer program for the determination of Central European freshwater gastropods.
Snail, Sturm, Robert
core   +1 more source

What explains the invading success of the aquatic mud snail Potamopyrgus antipodarum (Hydrobiidae, Mollusca)? [PDF]

, 2008
The spread of non-native species is one of the most harmful and least reversible disturbances in ecosystems. Species have to overcome several filters to become a pest (transport, establishment, spread and impact). Few studies have checked the traits that
Alonso, A., Castro-Diez, P.
core   +1 more source

Changing climates and environments within the complex Middle to Late Pleistocene fill of an overdeepened valley at Niederweningen, Switzerland

Boreas, EarlyView.
Glacially overdeepened valleys in the northern Alpine Foreland preserve Middle to Late Pleistocene sedimentary sequences that may serve as valuable archives for reconstructing past environmental changes in response to shifts in climate. This study presents a multidisciplinary analysis of two sediment cores from the overdeepened Wehntal Valley at ...
Johannes M. Miocic, Nigel Thew, Ruth Drescher‐Schneider, Hans Rudolf Graf, Marlu Kühn, Frank Preusser, Werner H. Schoch, Lucia Wick, Heinz Furrer   +8 more
wiley   +1 more source