Leaf toughness changes the effectiveness of larval aggregation in the butterflyByasa alcinous bradanus(Lepidoptera: Papilionidae)

Autor:	Tadashi Miyashita, Nami Kawasaki, Yoshiomi Kato
Rok vydání:	2009
Předmět:	Larva animal structures fungi Aristolochia debilis Zoology Byasa alcinous Biology Subspecies biology.organism_classification Lepidoptera genitalia Insect Science Butterfly Botany Host plants Instar Ecology Evolution Behavior and Systematics
Zdroj:	Entomological Science. 12:135-140
ISSN:	1479-8298 1343-8786
DOI:	10.1111/j.1479-8298.2009.00314.x
Popis:	Two subspecies of the papilionid butterfly Byasa alcinous, B. a. bradanus and B. a. alcinous, have varying degrees of larval aggregation. Early instar larvae of ssp. bradanus always occur in aggregations. To determine the functions of larval aggregation in this subspecies, we examined the effects of leaf toughness on larval performance when caterpillars were reared alone and in aggregations. Newly hatched larvae were reared either individually or in groups of 10 and were fed either tough or tender leaves of Aristolochia debilis. When fed tough leaves, more gregarious larvae survived the first instar. This difference between solitary and aggregated larvae did not occur when caterpillars were fed soft leaves. The effects of aggregation on larval weight and duration were not significant between leaf-toughness treatments. Larval aggregation of B. a. bradanus improves larval survivorship in early instars that use host plants with tough leaves.
Databáze:	OpenAIRE
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