Biology of myotis thysanodes and M. lucifugus (chiroptera: vespertilionidae)—II. Bioenergetics of pregnancy and lactation

Feeding Strategies of the Little Brown Bat, Myotis Lucifugus, in Southern New Hampshire

“…Although this increase is consistent with the findings of Studier et al (1973) that the energy cost of lactation is greater than that of pregnancy, the magnitude of increase is larger than expected on the basis of their data. Although this increase is consistent with the findings of Studier et al (1973) that the energy cost of lactation is greater than that of pregnancy, the magnitude of increase is larger than expected on the basis of their data.…”

“…Our data indicate that food consumption by M. lucifugus increases by = 10.5 kJ/day (2.5 kcal/day) during lactation, relative to the pregnancy period. Although this increase is consistent with the findings of Studier et al (1973) that the energy cost of lactation is greater than that of pregnancy, the magnitude of increase is larger than expected on the basis of their data. These authors reported an investment of 77.6 cal/day (0.32 kJ/day) for fetal growth in M. thysanodes, compared with 346.0 cal!day (1.45 kJ/day) for nourishment of neonatal young.…”

Feeding Strategies of the Little Brown Bat, Myotis Lucifugus, in Southern New Hampshire

“…Although this increase is consistent with the findings of Studier et al (1973) that the energy cost of lactation is greater than that of pregnancy, the magnitude of increase is larger than expected on the basis of their data. Although this increase is consistent with the findings of Studier et al (1973) that the energy cost of lactation is greater than that of pregnancy, the magnitude of increase is larger than expected on the basis of their data.…”

“…Our data indicate that food consumption by M. lucifugus increases by = 10.5 kJ/day (2.5 kcal/day) during lactation, relative to the pregnancy period. Although this increase is consistent with the findings of Studier et al (1973) that the energy cost of lactation is greater than that of pregnancy, the magnitude of increase is larger than expected on the basis of their data. These authors reported an investment of 77.6 cal/day (0.32 kJ/day) for fetal growth in M. thysanodes, compared with 346.0 cal!day (1.45 kJ/day) for nourishment of neonatal young.…”

Effect of reproductive state and body size on food consumption in captive Galago senegalensis braccatus

“…Miller (1975) found that food consumption of white-footed mice was higher during lactation than during cycling or pregnancy, and that food intake was higher in late than in early lactation. Similar results have been found in other small mammals such as bank voles (Kaczmarski, 1966), cave bats (Studier et al, 1973;Kunz, 19741, golden hamsters (Fleming and Miceli, 1983) and rats (Shirley, 1984).…”

Feeding Territoriality in Female Northern Bats, Eptesicus nilssoni

“…The high frequency of territorial conflicts after the nearly 10 fold increase in insect abundance thus suggests that competition for food persisted throughout the breeding season. Increase in food abundance coincided with increased energy demands of lactation (STUDIER et al 1973). In general, however, the results agree with those for other bats (VAUGHAN 1976;BELWOOD & FULLARD 1984;RACEY & SWIFT 1985) in that the frequencies of territorial defence decreased as insect abundance increased.…”

Feeding Strategies of the Little Brown Bat, Myotis Lucifugus, in Southern New Hampshire

“…Although this increase is consistent with the findings of Studier et al (1973) that the energy cost of lactation is greater than that of pregnancy, the magnitude of increase is larger than expected on the basis of their data. Although this increase is consistent with the findings of Studier et al (1973) that the energy cost of lactation is greater than that of pregnancy, the magnitude of increase is larger than expected on the basis of their data.…”

“…Our data indicate that food consumption by M. lucifugus increases by = 10.5 kJ/day (2.5 kcal/day) during lactation, relative to the pregnancy period. Although this increase is consistent with the findings of Studier et al (1973) that the energy cost of lactation is greater than that of pregnancy, the magnitude of increase is larger than expected on the basis of their data. These authors reported an investment of 77.6 cal/day (0.32 kJ/day) for fetal growth in M. thysanodes, compared with 346.0 cal!day (1.45 kJ/day) for nourishment of neonatal young.…”

Effect of reproductive state and body size on food consumption in captive Galago senegalensis braccatus

“…Miller (1975) found that food consumption of white-footed mice was higher during lactation than during cycling or pregnancy, and that food intake was higher in late than in early lactation. Similar results have been found in other small mammals such as bank voles (Kaczmarski, 1966), cave bats (Studier et al, 1973;Kunz, 19741, golden hamsters (Fleming and Miceli, 1983) and rats (Shirley, 1984).…”

Feeding Territoriality in Female Northern Bats, Eptesicus nilssoni

“…The high frequency of territorial conflicts after the nearly 10 fold increase in insect abundance thus suggests that competition for food persisted throughout the breeding season. Increase in food abundance coincided with increased energy demands of lactation (STUDIER et al 1973). In general, however, the results agree with those for other bats (VAUGHAN 1976;BELWOOD & FULLARD 1984;RACEY & SWIFT 1985) in that the frequencies of territorial defence decreased as insect abundance increased.…”

Feeding Strategies of the Little Brown Bat, Myotis Lucifugus, in Southern New Hampshire

“…Although this increase is consistent with the findings of Studier et al (1973) that the energy cost of lactation is greater than that of pregnancy, the magnitude of increase is larger than expected on the basis of their data. Although this increase is consistent with the findings of Studier et al (1973) that the energy cost of lactation is greater than that of pregnancy, the magnitude of increase is larger than expected on the basis of their data.…”

“…Our data indicate that food consumption by M. lucifugus increases by = 10.5 kJ/day (2.5 kcal/day) during lactation, relative to the pregnancy period. Although this increase is consistent with the findings of Studier et al (1973) that the energy cost of lactation is greater than that of pregnancy, the magnitude of increase is larger than expected on the basis of their data. These authors reported an investment of 77.6 cal/day (0.32 kJ/day) for fetal growth in M. thysanodes, compared with 346.0 cal!day (1.45 kJ/day) for nourishment of neonatal young.…”

Effect of reproductive state and body size on food consumption in captive Galago senegalensis braccatus

“…Miller (1975) found that food consumption of white-footed mice was higher during lactation than during cycling or pregnancy, and that food intake was higher in late than in early lactation. Similar results have been found in other small mammals such as bank voles (Kaczmarski, 1966), cave bats (Studier et al, 1973;Kunz, 19741, golden hamsters (Fleming and Miceli, 1983) and rats (Shirley, 1984).…”

Feeding Territoriality in Female Northern Bats, Eptesicus nilssoni

“…The high frequency of territorial conflicts after the nearly 10 fold increase in insect abundance thus suggests that competition for food persisted throughout the breeding season. Increase in food abundance coincided with increased energy demands of lactation (STUDIER et al 1973). In general, however, the results agree with those for other bats (VAUGHAN 1976;BELWOOD & FULLARD 1984;RACEY & SWIFT 1985) in that the frequencies of territorial defence decreased as insect abundance increased.…”