Effects of Dietary Ascorbic Acid on Performance, Carcass Composition and Bone Characteristics of Turkeys during High Summer Temperature

The rain experienced in January of this year has so much exceeded the average quantity, considerable as that is in the Lake District, that I have been led to consider it worthy of record, especially keeping in mind, that as regards risks from floods, it is not the ordinary, but the extraordinary that is to be guarded against in the construction of all works with which water is concerned as an element of danger.It may not be amiss to premise, that the year preceding, as to weather, was chiefly remarkable for the mildness of the first quarter, for its high summer temperature, for the unusual cold experienced in November, and this succeeded by a mild December. January set in with weather of the same character, and was without any marked peculiarity, excepting its mildness, till the 9th, when rain commenced, and, with the exception of two or three days, continued to fall more or less heavily till the end of the month.

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Ancient genomes reveal tropical bovid species in the Tibetan Plateau contributed to the prevalence of hunting game until the late Neolithic

Proceedings of the National Academy of Sciences ◽

10.1073/pnas.2011696117 ◽

2020 ◽

Vol 117 (45) ◽

pp. 28150-28159

Author(s):

Ningbo Chen ◽

Lele Ren ◽

Linyao Du ◽

Jiawen Hou ◽

Victoria E. Mullin ◽

...

Keyword(s):

Tibetan Plateau ◽

Summer Temperature ◽

The Tibetan Plateau ◽

Late Neolithic ◽

Important Prey ◽

Northeastern Tibetan Plateau ◽

Whole Genomes ◽

High Summer Temperature ◽

Northward Expansion ◽

Adna Analysis

Local wild bovids have been determined to be important prey on the northeastern Tibetan Plateau (NETP), where hunting game was a major subsistence strategy until the late Neolithic, when farming lifestyles dominated in the neighboring Loess Plateau. However, the species affiliation and population ecology of these prehistoric wild bovids in the prehistoric NETP remain unknown. Ancient DNA (aDNA) analysis is highly informative in decoding this puzzle. Here, we applied aDNA analysis to fragmented bovid and rhinoceros specimens dating ∼5,200 y B.P. from the Neolithic site of Shannashuzha located in the marginal area of the NETP. Utilizing both whole genomes and mitochondrial DNA, our results demonstrate that the range of the present-day tropical gaur (Bos gaurus) extended as far north as the margins of the NETP during the late Neolithic from ∼29°N to ∼34°N. Furthermore, comparative analysis with zooarchaeological and paleoclimatic evidence indicated that a high summer temperature in the late Neolithic might have facilitated the northward expansion of tropical animals (at least gaur and Sumatran-like rhinoceros) to the NETP. This enriched the diversity of wildlife, thus providing abundant hunting resources for humans and facilitating the exploration of the Tibetan Plateau as one of the last habitats for hunting game in East Asia.

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Morphological changes in a marine population of threespined stickleback, Gasterosteus aculeatus, recently isolated in fresh water

Canadian Journal of Zoology ◽

10.1139/z93-171 ◽

1993 ◽

Vol 71 (6) ◽

pp. 1251-1258 ◽

Cited By ~ 64

Author(s):

T. Klepaker

Keyword(s):

Fresh Water ◽

Gasterosteus Aculeatus ◽

Morphological Changes ◽

Summer Temperature ◽

Isolated Population ◽

Morphometric Characters ◽

Temperature Changes ◽

Marine Population ◽

High Summer Temperature ◽

Compact Body

A marine population of Gasterosteus aculeatus recently isolated in fresh water was found in Bergen, western Norway. This discovery offered the opportunity to study early changes in a population isolated in an environment quite different from what it previously experienced. The population was sampled in 1982, 1987, and 1991. Variation of plate morph frequencies was studied, and a prediction model for the change in frequencies is proposed. An increasing frequency of specimens with four dorsal spines is observed. This may be related to high summer temperature. Changes in morphology were recorded and compared with those in the marine population from which the isolated population originated. Discriminant analysis was used to reveal differentiation in morphometric characters. The main morphometric change recorded was that the isolated population had developed a more compact body, which is probably an adaptation to a less active, more benthic way of living.

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