Interannual Variability in the Energy Reserves of Laxmann’s Shrew (Sorex caecutiens) on the Northern Coast of the Sea of Okhotsk
2022
Kiselev, S. V.
The dependence among the content of energy reserves in Sorex caecutiens, the abundance of food objects, and the number of shrews in the summer periods of 2012–2019 was estimated. The glycogen content in the liver of S. caecutiens did not show a significant relationship to the number of animals. The mass of fat depots and the relative biomass of invertebrates (according to the counting data obtained with the pitfall traps) in August were inversely related to the total number of all species of shrews inhabiting the territory. The mass of the adipose tissue of S. caecutiens positively correlated with the biomass of insect larvae (primarily of caterpillar-like ones, which constituted the bulk of larvae in the samples). The revealed features indicate an increase in intra- and interspecific food competition during the years of high numbers of shrews.
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