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Conservation Biology of Lycaenidae (Butterflies) - IUCN

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Overview <strong>of</strong> problems in Japan<br />

Toshiya HIROWATARI<br />

Entomological Laboratory, College <strong>of</strong> Agriculture, University <strong>of</strong> Osaka Prefecture, Sakai, Osaka, 591 Japan<br />

In Japan, there are about 240 resident butterfly species which<br />

comprise palaearctic and oriental faunal elements. Fortunately,<br />

none <strong>of</strong> them has been rendered completely extinct but many<br />

local butterfly colonies seem to have been totally eradicated.<br />

The first legislation to protect butterflies as 'Tennen<br />

Kinenbutu' or 'Natural monuments' was promulgated by the<br />

national government in 1932 for Panchala ganesa (<strong>Lycaenidae</strong>,<br />

Arhopalini) in Nara City. Until now, a total <strong>of</strong> 37 species have<br />

been designated as 'Tennen Kinenbutu' by the national and<br />

local governments. However, in some cases, legislation for the<br />

prohibition <strong>of</strong> collecting without any effective measures for<br />

conservation seems to have been ineffective, especially when a<br />

taxon is designated as a protected species rather than as a local<br />

population with a definable habitat or biotype. In fact, the Nara<br />

population <strong>of</strong> P. ganesa seems to have become extinct without<br />

any precise records because collectors lost interest in studying<br />

protected species. Another case is that <strong>of</strong> Shijimia moorei<br />

(Leech) (<strong>Lycaenidae</strong>, Polyommatini). This species had been<br />

known to occur in east Asia in places such as China and Taiwan.<br />

It was not until 1973 that this species was discovered in Kyushu,<br />

Table 1. <strong>Lycaenidae</strong> from Japan listed by Hama et al. (1989).<br />

Species<br />

Artopoeles pryeri Murray<br />

Coreana raphaelis Oberthur<br />

Niphandra fusca Bremer<br />

Shijimiaeoides divinus Fixcen<br />

Tongeia fisheri Eversmann<br />

Lycaeides subsolana Eversmann<br />

Causes <strong>of</strong> decline<br />

Urbanisation<br />

Urbanisation; deforestation<br />

Urbanisation<br />

Road construction<br />

Larch forestation<br />

Habitat degradation<br />

Orchard and golf course construction<br />

Agriculture and spraying<br />

Factory construction<br />

Flood: foodplant extinction<br />

Urbanisation<br />

Succession<br />

Flood control works<br />

35<br />

Japan: its distribution is extremely local, feeding on Lysionotus<br />

pauceflorus (Gesneriaceae) which usually grows on Quercus<br />

trees (Fagaceae) in humid evergreen forest. Just after that, in<br />

1975, this species was designated as 'Tennen Kinenbutu' by the<br />

national government. In this case, the original colonies <strong>of</strong><br />

Kyushu seem to have been conserved. However, there have<br />

been few additional records from other areas (except one from<br />

Nara, Honshu) because collectors do not publish records <strong>of</strong><br />

protected species even if these are caught. It is believed that<br />

some populations <strong>of</strong> S. moorei other than that in Kyushu<br />

become extinct without any definite records <strong>of</strong> this.<br />

Apart from Shijimia moorei, the decline <strong>of</strong> Japanese<br />

butterflies is attributable to alteration in land management<br />

practices and its effect on butterfly habitat. In Japan, most <strong>of</strong> the<br />

victims, such as Shijimiaeoides divinus Fixcen (<strong>Lycaenidae</strong>,<br />

Polyommatini), Coreana raphaelis Oberthur (<strong>Lycaenidae</strong>,<br />

Theclini) and FabriciananerippeC & R. Felder(Nymphalidae),<br />

depend on habitats such as coppice or grassland which have<br />

been maintained by traditional agricultural practices such as<br />

slash and burn, periodical coppicing for fuels and charcoal<br />

Locality<br />

Setagaya, Tokyo<br />

Kawanishi, Yamagata<br />

Kiso, Nagano; Shiga<br />

Kiso, Nagano; Shiga<br />

Kiso, Nagano<br />

Aomori<br />

Aomori<br />

Azumino, Nagano<br />

Komagano, Nagano; Matsumato, Nagano<br />

Matsumato, Nagano<br />

Azumino, Nagano<br />

Minami-azumi, Nagano

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