Effect of soil pollution with metallic lead pellets on lead bioaccumulation and organ/body weight alterations in small mammals

1989 ◽  
Vol 18 (4) ◽  
pp. 617-622 ◽  
Author(s):  
Wei -chun Ma
Keyword(s):  
Body Weight ◽  
Soil Pollution ◽  
Small Mammals ◽  
Metallic Lead

Ventilation standards for small mammals

1964 ◽  
Vol 19 (2) ◽  
pp. 360-362 ◽  
Author(s):  
Leonard I. Kleinman ◽  
Edward P. Radford
Keyword(s):  
Body Weight ◽  
Tidal Volume ◽  
Small Mammals ◽  
Artificial Respiration ◽  
Alveolar Ventilation ◽  
Breathing Frequency ◽  
Slide Rule ◽  
Physiological Dead Space ◽  
The Relationship ◽  
Tidal Volume Breathing

Ventilation standards for small mammals have been prepared on the basis of the relationship between alveolar ventilation and metabolism. On the assumptions of an average respiratory quotient of 0.85 and physiological dead space directly proportional to tidal volume, the relationship between tidal volume, breathing frequency, and body weight has been derived. The standards are presented in a graphic form and as a slide rule. animal ventilation; artificial respiration; tidal volume, breathing frequency and body weight relationship Submitted on August 15, 1963

The Small Mammals of Little Nourlangie Rock, NT. V. The Effects of Fire

1981 ◽  
Vol 8 (3) ◽  
pp. 515 ◽  
Author(s):  
RJ Begg ◽  
KC Martin ◽  
NF Price
Keyword(s):  
Body Weight ◽  
Litter Size ◽  
Small Mammals ◽  
Pregnant Females ◽  
Preferred Habitat ◽  
Closed Forest ◽  
The Mean ◽  
Fuel Characteristics ◽  
Release Program

Following a capture-mark-release program (February 1977-June 1979) on Dasyurus hallucatus, Antechinus bilarni, Zyzomys argurus and Zyzomys woodwardi, the study area was burnt to determine the effects of fire on these species. The area was described in terms of fuel characteristics and details of the fire were recorded. Post-fire trapping began July 1979 and continued until July 1980 (15,600 trap-nights). A. bilarni was the only species to suffer an increased mortality immediately after the fire, but the number of animals known to be alive declined over the year following the fire, for all species except D. hallucatus. The fire affected reproduction in all four species, but in different ways. Breeding in D. hallucatus was delayed by 1 month, and the mean number of young leaving the pouch per female was lower than before the fire. A higher number of resident females kept recruitment up. Litter size in A. bilarni was not affected, but a reduced number of resident females meant that recruitment was halved. Zyzomys argurus and Z. woodwardi showed few lactating and pregnant females in July-August following the fire, and the numbers of juveniles were lower than in the previous two years. Following the fire, no detectable differences in body weight were recorded, but all species except D. hallucatus changed their preferred habitat, moving to the Scree Slope. Z. woodwardi was most affected, and moved from the Closed Forest.

A Body-Weight Criterion to Identify Dispersing Small Mammals

1984 ◽  
Vol 65 (4) ◽  
pp. 727-729 ◽  
Author(s):  
R. D. Dueser ◽  
R. K. Rose ◽  
J. H. Porter
Keyword(s):  
Body Weight ◽  
Small Mammals ◽  
Weight Criterion

scholarly journals Productivity of breeding pigs during marl feeding in areas with high density of soil pollution with radiocesium

2020 ◽  
Vol 27 ◽  
pp. 00033
Author(s):  
Anna G. Menyakina ◽  
Leonid N. Gamko ◽  
Vladimir A. Streltsov ◽  
Tatiana L. Talyzina
Keyword(s):  
Body Weight ◽  
Soil Pollution ◽  
Dry Matter ◽  
The Body ◽  
Sorption Properties ◽  
Metabolic Processes ◽  
Mineral Supplement ◽  
Breeding Stock ◽  
Animal Body ◽  
Cesium 137

The paper considers the experimentally confirmed data on marl efficiency in the zones with increased level of radionuclides in the soil (5–10 and 15–40 Ki/km2) in the last third of female pig pregnancy in the amount of 2.0 % of the diet dry matter. Feeding with local mineral supplement increases the reproductive functions of breeding pigs, in particular, the number of stillborn piglets decreased by 1.64–7.70 % and their safety to weaning increased by 4.8–11.9 %. The increase of redox and metabolic processes in the animal body of the experimental groups positively affected the milking capacity of the breeding stock increasing it by 6.8–21.9 % and the growth of piglets, which was confirmed by their larger body weight by 3.3 and 4.6 %. The sorption properties of marl allowed reducing the concentration of toxic lead in the body of breeding pigs (by 40.17 and 42.01 %) and cadmium (by 20.57 and 24.42 %), decreasing the transition of cesium-137 isotope to beestings milk by 1.34 and 1.28 times. In areas with high soil pollution with radiocesium in Bryansk region, the use of natural marl sorbent in breeding pigs’ diets activates their immunity, hematopoietic functions, accelerates assimilation of protein and mineral exchange.

scholarly journals Effects of contaminants and trophic cascade regulation on food chain stability: Application to cadmium soil pollution on small mammals – Raptor systems

2018 ◽  
Vol 382 ◽  
pp. 33-42 ◽  
Author(s):  
Virgile Baudrot ◽  
Clémentine Fritsch ◽  
Antoine Perasso ◽  
Malay Banerjee ◽  
Francis Raoul
Keyword(s):  
Soil Pollution ◽  
Small Mammals ◽  
Food Chain ◽  
Trophic Cascade

The Small Mammals of Little Nourlangie Rock, N.T II. Ecology of Antechinus bilarni, the Sandstone Antechinus (Marsupialia: Dasyuridae)

1981 ◽  
Vol 8 (1) ◽  
pp. 57 ◽  
Author(s):  
RJ Begg
Keyword(s):  
Body Weight ◽  
Breeding Season ◽  
Small Mammals ◽  
Total Catch ◽  
Wet Season ◽  
Free Living ◽  
Preferred Habitat ◽  
Males And Females ◽  
Testes Size ◽  
Release Program

In a capture-mark-release program on Antechinus bilarni at Little Nourlangie Rock, N.T., from February 1977 to June 1979, 34,800 trap nights were set, for a total catch of 174 males and 162 females. Breeding is strictly seasonal, with mating around late June. Pouch young are carried in August and September. Lactation continues until December, when free-living young are first trapped. Males show a seasonal increase in testes size, with a decrease after mating. There is no die-off of males; both males and females may survive for a second breeding season. Males undergo a second cycle of increase in testes size, and histological sampling revealed spermatogenesis during their second breeding season. Individual males and females were trapped for up to 24 and 25 months respectively; KTBA estimates are similar for both sexes. Both sexes continue to increase in body weight throughout life. although males lose weight substantially after each breeding season. Sex ratios dropped during October of each year because the activity and trappability of males dropped. Males were recaptured with the onset of the wet season. The preferred habitat was scree slope, at an altitude of around 40-55 m. Some seasonal shifts in habitat were probably related to food availability.

Rattus-Lutreolus, Colonizer of Heathland After Fire in the Absence of Pseudomys Species

1986 ◽  
Vol 13 (2) ◽  
pp. 127 ◽  
Author(s):  
PC Catling
Keyword(s):  
Body Weight ◽  
Species Diversity ◽  
Small Mammals ◽  
Nature Reserve ◽  
New South ◽  
Regeneration Niche ◽  
Lower Body ◽  
European Settlement ◽  
South Wales ◽  
Lower Body Weight

The recolonization of heathland habitats by small mammals after wildfire was examined in Nadgee Nature Reserve, south-eastern New South Wales. The first native small mammal to arrive was R. lutreolus. Thickets of tall vegetation were very important and these were colonized via a network of runways leading from one thicket to another. R. lutreolus were reproductively active at a lower body weight on previously empty (marginal) heathland habitats than in preferred habitats. After fire, abundance and species diversity of small mammals increased as habitats aged and grew in complexity. Survival was best on the most structurally complex habitats. Different requirements of habitat and water are suggested as the main reasons R. lutreolus were first to colonize heathland, rather than R. fuscrpes. It is also proposed that the lack of competition from Pseudomys spp. may cause R. lutreolus to switch from the usual 'late regeneration niche' to an 'early' one. Past studies have proposed the reduction in burning since European settlement as a cause of the decline in several pseudomyine species. This paper proposes that too frequent burning may have the same result.

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