Population dynamics of animals in unpredictably-changing tropical environments

Inoue, Tamiji; Nakamura, Koji; Salmah, Siti; Abbas, Idrus

doi:10.1007/bf02703078

Cited by 64 publications

(52 citation statements)

References 56 publications

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“…The current results ue discussed with our previous data of the two species in two localities with higher and less seasonal rainfall conditions, Padang (central Sumatra) and Bogor (West Java Wolda, 1988;Nakamura et al, 1990; Inoue et ql., 1993 (Nakamura & Abbas, 1987ab, 1989 Nakamura et al, 1989). We compare our results with those in former studies, illustrating how insects adapt thefu life history to different habitat conditions in the tropics.…”

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confidence: 82%

Population Dynamics of Two Species of Tortoise Beetles, Aspidomorpha miliaris and A. sanctaecrucis(Coleoptera: Chrysomelidae: Cassidinae) in East Java, Indonesia. 1. Seasonal Changes in Population Size and Longevity of Adult Beetles.

Noerdjito

浩二

1999

Tropics

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We studied the population dynamics of two species of tortoise beetles, Aspidomorplw miliaris (AM) and A. sanctaecnrcis (AS) (Coleoptera: Chrysomelidae: Cassidinae), feeding on a shrubby moming gluy, Ipomoea carnea (Convolvulaceae), in Purwodadi Bounic Garden, East Java, Indonesia.Rainfall in Purwodadi is distinctly seasonal with 5-7 months of harsh dry season, lasting from March or April to October or November. In March of 1993, we established three study sites by planting 10 cuttings of the host plants on each site. We carried out a weekly census including mark-recapture of adults with color paints and construction of life tables for immature stages, from June 1993 to March 1996, Total number of leaves on the study sites increased during ttre wet season and decreased during the dry season, although effects of dry seasons on the change in the total number of plant leaves depended on the site condition (sunshine and water). We marked all beetles found on the sites (136 and 436 beetles for AM and AS, respectively). Adult populations of the two species increased in the rainy season, decreased as the dry season started, and disappeued in the late dry season. Seasonal trends in the adult numbers mainly reflected the oviposition activity of adults, which was high in the rainy season and diminished or nil in the dry season. The sex ratio was l:l in AM and largely female-biased in AS.Average adult residence time (days) on each site was 6.6 (male) and 8.1 (female) in AM and 7.0 (male) and 9.8 (female) in AS. The current results ue discussed with our previous data of the two species in two localities with higher and less seasonal rainfall conditions, Padang (central Sumatra) and Bogor (West Java Wolda, 1988;Nakamura et al., 1990; Inoue et ql., 1993 (Nakamura & Abbas, 1987ab, 1989 Nakamura et al., 1989). We compare our results with those in former studies, illustrating how insects adapt thefu life history to different habitat conditions in the tropics.We previously reported how seasonality affects abundance and egg mortality (Nakamura & Abbas, 1987ab, 1989, survivorship and fertility schedules ofAM and AS under laboratory conditions in padang (Nakamura et al., 1989), the effects of ants on larvae of AS in Bogor (Noerdjito et al., 1992), and a list with keys to genera and species of Cassidinae of Java, including AM and AS (Kimoto aal.,1996). padang lies on the equator (0"53'5, 1.00'21'E, near sea level), and has a predominantly tropical rainforest climate with an annual rainfall of 4000-5000 mm without a distinct alternation of dry and wet seasons (Inoue & Nakamura, 1990). Bogor (6'37'5, 106"32'E,260 m altitude), located at the eastern end of the tropical rainforest climate centered by Padang, has an annual rainfall of 3850 mm (range = 2000 to 55ffi mm). In Bogor, the cycles of dry and wet seasons are less distinct and more irregular than those of East Java, where the present study was conducted' Compared with Padang' Bogor has lower but more seasonal rainfall and more severe droughts'The present paper addre...

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confidence: 82%

Population Dynamics of Two Species of Tortoise Beetles, Aspidomorpha miliaris and A. sanctaecrucis(Coleoptera: Chrysomelidae: Cassidinae) in East Java, Indonesia. 1. Seasonal Changes in Population Size and Longevity of Adult Beetles.

Noerdjito

浩二

1999

Tropics

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“…Giant honeybees immigrate to lowland mixed dipterocarp forests as soon as general flowering starts, and when it finishes they leave (Itioka et al, 2001). However, stingless bees show none of these responses, i.e., they do not show rapid population growth (Inoue et al, 1993), change food types from nectar and pollen to others, or migrate over a long distance (Inoue et al, 1984).…”

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confidence: 99%

Foraging activity and pollen diets of subterranean stingless bee colonies in response to general flowering in Sarawak, Malaysia

Nagamitsu

Inoue

2002

Apidologie

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-General flowering is a type of supra-annual mast flowering at community level in Southeast Asia, which occurred in 1996 after a four-year interval in northern Sarawak, Malaysia. To examine foraging responses to general flowering, foraging activity and pollen diets of subterranean stingless bee (Trigona spp.) colonies were compared over 3 periods in 1994 and 1996. Among variables of foraging activity (frequency of forager returns, proportions of nectar and pollen foragers), only the frequency of forager returns was significantly higher in 1996 than in 1994. The proportion of nectar foragers differed significantly among periods within a year. Among variables of pollen diet breadth (pollen type richness, diversity and evenness indices), none differed significantly between years or among periods. Pollen diet similarity between colonies did not differ significantly between years, although it differed among periods. lowland mixed dipterocarp forests / foraging / general flowering / nectar / pollen diet / Sarawak / Trigona

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“…The beetles, Epilachna septima Dieke and E. dodecastigma Wiedemann, both feeding on cucurbitaceous plants showed more prolonged longevity and fertility schedules than temperate species, including Japanese epilachnine beetles. These species are obviously well adapted for living in tropical environment like Padang (Nakamura et at., 1984;Abbas et at., 1985;Inoue et at., 1993). The present article will describe the reproductive schedules of three epilachnine species, Epilachna sp.…”

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Survivorship and Fertility Schedules of Three Phytophagous Ladybird Beetle Species (Coleoptera: Coccinellidae) under Laboratory Conditions in Bogor, West Java.

Nakamura

Pudjiastuti²,

Katakura

1995

Tropics

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Three species of epilachnine beetles, Epilachna sp. 3 (aff. emarginata) (EM) feeding on Mikania sp. (Compositae), E. vigintioctopunctata (EV) and E. enneasticta (EN) both feeding on Solanum torvum (Solanaceae), were reared to study the survivorship and fertility schedules under laboratory conditions. Duration for the development of the immature stages, mean longevity of adults, mean length of the pre-and post-reproductive period, and total number of eggs produced per female were recorded. The demographic parameters such as the intrinsic rate of natural increase (r), reproductive value (V x / Vo)' and mean length of a generation (T) were calculated.Key Words: Epilachna / Coccinellidae / West Java / Indonesia / Survivorship and fertility schedulesIn the preceding papers, we reported the demographic traits of three epilachnine beetles obtained in Padang, Sumatra under laboratory conditions. The beetles, Epilachna septima Dieke and E. dodecastigma Wiedemann, both feeding on cucurbitaceous plants showed more prolonged longevity and fertility schedules than temperate species, including Japanese epilachnine beetles. These species are obviously well adapted for living in tropical environment like Padang (Nakamura et at., 1984;Abbas et at., 1985;Inoue et at., 1993). The present article will describe the reproductive schedules of three epilachnine species, Epilachna sp. 3 (aff. emarginata Dieke; see ; thereafter abbreviated as EM), E. vigintioctopunctata Fabricius (EV) and E. enneasticta Mulsant (EN), which were collected in Bogor, West Java, under laboratory conditions, and compare them with the previous results obtained in Padang, Sumatra.

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Population dynamics of animals in unpredictably-changing tropical environments

Cited by 64 publications

References 56 publications

Population Dynamics of Two Species of Tortoise Beetles, Aspidomorpha miliaris and A. sanctaecrucis(Coleoptera: Chrysomelidae: Cassidinae) in East Java, Indonesia. 1. Seasonal Changes in Population Size and Longevity of Adult Beetles.

Population Dynamics of Two Species of Tortoise Beetles, Aspidomorpha miliaris and A. sanctaecrucis(Coleoptera: Chrysomelidae: Cassidinae) in East Java, Indonesia. 1. Seasonal Changes in Population Size and Longevity of Adult Beetles.

Foraging activity and pollen diets of subterranean stingless bee colonies in response to general flowering in Sarawak, Malaysia

Survivorship and Fertility Schedules of Three Phytophagous Ladybird Beetle Species (Coleoptera: Coccinellidae) under Laboratory Conditions in Bogor, West Java.

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