Weygoldt Peter
Biologisches Institut I (Zoologie) der Albert-Ludwigs-Universität, Katharinenstr. 20, D-7800, Freiburg i.Br., Federal Republic of Germany.
Oecologia. 1977 Dec;27(4):363-370. doi: 10.1007/BF00345569.
Heterophrynus longicornis Butler and H. alces Pocock are sympatric and syntopic in Serra do Navio in the central part of Amapá, N.-E. Brazil. Both species are of similar sizes during part of their life cycles. Competition is probably reduced by utilization of different hiding places and strata. In H. longicornis, adults are tolerant towards conspecifics. Male and female are usually found close to each other and, under laboratory conditions, courtship behaviour can be observed even when the female is not receptive. H. alces, on the other hand, is very intolerant, and usually only single specimens are found. Under laboratory conditions, cannibalism is frequent. The ecological implications of these differences are discussed.
长角异蟾（Heterophrynus longicornis Butler）和阿尔克异蟾（H. alces Pocock）在巴西东北部阿马帕州中部的纳维奥山脉同域且同处一地。在其部分生命周期中，这两个物种体型相似。通过利用不同的藏身之处和地层，竞争可能会减少。在长角异蟾中，成年个体对同种个体具有耐受性。雄性和雌性通常彼此靠近，并且在实验室条件下，即使雌性不接受，也能观察到求偶行为。另一方面，阿尔克异蟾非常不耐受，通常只能发现单个个体。在实验室条件下，同类相食很常见。文中讨论了这些差异的生态意义。
