Early ontogeny of foraging behaviour in the short-nosed fruit bat <i>Cynopterus sphinx</i> (Megachiroptera) : preliminary results

Gopukumar, N.; Nathan, Parthasarathy Thiruchenthil; Doss, Paramanantha Swami; Prakash, Abhinav; Emmanuel, Klaus; Balasingh, J.; Marimuthu, G.; Kunz, Thomas

doi:10.1515/mamm.2003.67.1.139

Cited by 15 publications

(8 citation statements)

References 23 publications

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“…Changes in the temporal pattern of time-activity budgets are indicative of a transition stage in ontogenetic development (Lambin & Yoccoz, 2001; Gopukumar, 2003; Benton et al, 2008; Fay et al, 2016). Life-long individual monitoring that measures time-activity budgets provides a way to quantify a shift in the temporal pattern in time-activity budgets of insects.…”

Section: Discussionmentioning

confidence: 99%

Measuring ontogenetic shifts in central-place foraging insects: a case study with honey bees

Réquier

Henry

Decourtye³

et al. 2020

Preprint

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13 7 INRAE, UE 1255 APIS "Abeilles paysages interactions et systèmes de culture", Abstract 27 1. Measuring time-activity budgets over the complete individual lifespan is now 28 possible for many animals with the recent advances of life-long individual 29 monitoring devices. Although analyses of changes in the patterns of time-activity 30 budgets have revealed ontogenetic shifts in birds or mammals, no such technique 31has been applied to date on insects. 32 2. We tested an automated breakpoint-based procedure to detect, assess and 33 quantify shifts in the temporal pattern of the flight activities in honey bees. We 34 assumed that the learning and foraging stages of honey bees will differ in several 35 respects, to detect the age at onset of foraging (AOF). 36 3. Using an extensive dataset covering the life-long monitoring of 2,100 individuals, 37 we compared the AOF outputs with the more conventional approaches based on 38 arbitrary thresholds. We further evaluated the robustness of the different methods 39 comparing the foraging time-activity budget allocations between the presumed 40 foragers and confirmed foragers.41 4. We revealed a clear-cut learning-foraging ontogenetic shift that differs in duration, 42 frequency, and time of occurrence of flights. Although AOF appeared to be highly 43 plastic among bees, the breakpoint-based procedure seems better able to detect it 44 than arbitrary threshold-based methods that are unable to deal with inter-individual 45 variation. 46 5. We developed the aof R-package including a broad range of examples with both 47 simulated and empirical dataset to illustrate the simplicity of use of the procedure.48 This simple procedure is generic enough to be derived from any individual life-long 49 monitoring devices recording the time-activity budgets of honey bees, and could 50 3 propose new ecological applications of bio-logging to detect ontogenetic shifts in 51 the behaviour of central-place foraging insects. 52 53

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Section: Discussionmentioning

confidence: 99%

Measuring ontogenetic shifts in central-place foraging insects: a case study with honey bees

Réquier

Henry

Decourtye³

et al. 2020

Preprint

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“…Mimicry of maternal behavior has been hypothesized to be an important mechanism in the development of foraging habits of young moose ( Alces alces ; Kossak 1992). Gopukumar et al (2003) suggested young short‐nosed fruit bats, Cynopterus sphinx , learn locations of profitable food patches by accompanying their mothers on foraging flights during late lactation and weaning. Observational learning of maternal foraging techniques has also been implicated in nonhuman primates (Watts 1985, van Schaik et al 2003).…”

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confidence: 99%

Ontogeny of Movements and Foraging Ranges in the Australian Sea Lion

Fowler

Costa

Arnould

2007

Marine Mammal Science

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This study tracked the movements of Australian sea lion (Neophoca cinerea) pups, juveniles, and adult females to identify home ranges and determine if young sea lions accompanied their mothers at sea. Satellite tags were deployed on nine 15‐mo‐old pups, nine 23‐mo‐old juveniles, and twenty‐nine adult female Australian sea lions at Seal Bay Conservation Park, Kangaroo Island, South Australia. Females did not travel with their offspring at sea, suggesting young Australian sea lions learn foraging behaviors independently. Although home ranges increased with age, 23‐mo‐old juveniles had not developed adult movement capacity and their range was only 40.6% of the adult range. Juveniles traveled shorter distances (34.8 ± 5.5 km) at slower speeds (2.0 ± 0.3 km/h) than adults (67.9 ± 3.5 km and 3.9 ± 0.3 km/h). Young sea lions also stayed in shallower waters; sea floor depths of mean locations were 48 ± 7 m for juveniles and 74 ± 2 m for females. Restricted to shallow coastal waters, pups and juveniles are more likely to be disproportionately impacted by human activities. With limited available foraging habitat, young Australian sea lions appear particularly vulnerable to environmental alterations resulting from fisheries or climate change.

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“…At weaning, they must replace milk from their mothers with food they obtain themselves. For many species this transition is gradual, and the young have an extended period during which to learn foraging behavior from their mothers (Carrs 1995, Horning and Trillmich 1997 a , Mann and Smuts 1999, Gopukumar et al . 2003).…”

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confidence: 99%

Development of Diving by Harbor Seal Pups in Two Regions of Alaska: Use of the Water Column

Frost

Simpkins²,

Small

et al. 2006

Marine Mammal Science

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Satellite-linked dive recorders were attached to 53 harbor seal pups in Prince William Sound (PWS) and at Tugidak Island, Alaska, during 1997-1999. We used generalized additive models and bootstrap techniques to describe pup diving behavior during their first year of life. Pups increased their ability to dive during the first 3-6 mo, as indicated by increases in proportion of time in the water (time wet) and maximum dive depth achieved by a pup each day (max-depth) values. Time wet and/or max-depth later decreased, suggesting a seasonal component to diving behavior. Monthly time wet varied from an overall minimum of 0.68 at tagging in July to a maximum of 0.89 in November. Pups spent half of their time wet swimming in water <25 m deep, the shallowest 30% of the available water column. They spent only 5% of their time swimming in the deepest 30% of the available water column, at depths >60-70 m. This strongly suggests they were not feeding on or near bottom during their first year. Average maxdepths and deepest actual dives were similar for PWS and Tugidak pups. PWS pups dove deeper sooner and spent less time wet than Tugidak pups during the first few months after tagging, probably as a result of regional bathymetric differences. Diving behavior and body condition suggest that food availability was not 1 Current address: 73-

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Early ontogeny of foraging behaviour in the short-nosed fruit bat Cynopterus sphinx (Megachiroptera) : preliminary results

Cited by 15 publications

References 23 publications

Measuring ontogenetic shifts in central-place foraging insects: a case study with honey bees

Measuring ontogenetic shifts in central-place foraging insects: a case study with honey bees

Ontogeny of Movements and Foraging Ranges in the Australian Sea Lion

Development of Diving by Harbor Seal Pups in Two Regions of Alaska: Use of the Water Column

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