., 2009 ). However, given the variety of habitats available, and the seasonality regimes of tropical African regions, it can be predicted that considerable variations in diet composition should occur even within single species, and perhaps even within a same geographic region.
In this study, we analyze
February/March (rainy season), June (intermediary season), and September/October (dry season) of the year 2015. This allowed checking for seasonal differences in the activity and structure of DB communities. The sampling points were placed at a minimum distance of 100 m from ecotones to guarantee that most
Detecting seasonal movements between the Nile Valley and the adjacent desert in the Early Holocene period is a difficult task. The material production, especially the lithic industries, may have been oriented to different economic activities forwarded in these two different environments. Identifying lithic products as the output of the same cultural group moving from one area to the other may be, for this reason, quite complex. The Nabta region and the IInd Cataract offer an interesting hint on this argument. This contribution will try to highlight similarities between groups living in the Nile Valley and the Western Desert considering artefacts and faunal remains left by the inhabitants of Nabta/Kiseiba area and the Khartoum Variant sites of the Nile Valley IInd Cataract. This analysis will also make possible to advance a new chronological attribution for the Khartoum Variant cultural phase.
dimorphism and anecdotal notes on activity (Keiser, 1967 ; Henderson, 1974 ; Franzen, 1996 ; Goldberg, 1998 , 2005 ; Mesquita et al., 2010 , Mesquita et al., 2010 ). Herein we present information on patterns of diet, seasonal activity, daily activity and habitat selection by O. aeneus in a semi
examine geographic variation in diet between the two morphs and how it relates to different climatic regimes. We chose, instead, to examine how the morphs respond to seasonal shifts in meteorological conditions at a single location where the two morphs coexist in sympatry. In northeastern Ohio (USA
Amphibians present behaviors and reproductive strategies that are highly dependent on environmental conditions, which are primarily influenced by the distribution and abundance of water (Heyer et al., 1994 ). In tropical regions with well-defined seasonality, the occurrence
facilitates the behavioral buffering of unpredictable changes in environments (Lefebvre et al., 1997 ; Sayol et al., 2016 ). Central to the CBH is that larger-brained species should perform better in more seasonal habitats where cognitive demands are stronger because it is difficult to locate the available
The available data are reviewed on ichthyofaunas from prehistoric sites along the Nile in Egypt and Sudanese Nubia. Former fishing practices are reconstructed using information derived from species spectra, reconstructed fish sizes, growth increment analysis and fishing implements. It is demonstrated that fishing was initially practised exclusively on the floodplain and that it was limited to a small number of shallow water taxa during Late Palaeolithic times. From the Epipalaeolithic onwards (ca 10000-8000 bp), fishing was also undertaken in the main Nile whereby the number of exploited species increased. Technological innovations allowing the exploitation of the deeper parts of the main river included nets and fish-hooks as well as improved vessels, permitting the capture of larger species from the open water. It is argued that fish must always have been a staple food because the animals seasonally occurring in large numbers on the floodplain were intensively exploited and because these fish could be easily dried for future consumption. Once the fishing grounds also included the main river, fishing was no longer restricted to the flood season, but could also be carried out when the Nile levels were low. Hence the role of fish in the resource scheduling also changed at the transition of Late Palaeolithic to Epipalaeolithic times.
, platypuses are seasonal breeders that mate in late-winter to spring and show a latitudinal cline in breeding season with northern populations breeding earlier than the southern populations (Grant & Temple-Smith, 1998). After mating, the female platypus constructs a nest of wet vegetation in a burrow where