A new lentic form of the “yoshinobori” species complex, Rhinogobius spp. from Lake Biwa, Japan, compared with lake–river migrating Rhinogobius sp. OR
A new lentic form of the “yoshinobori” species complex, Rhinogobius spp. from Lake Biwa, Japan, compared with lake–river migrating Rhinogobius sp. OR
复制标题
一种新的“yoshinobori”物种复合体，来自日本琵琶湖的Rhinogobius spp.与湖泊河流迁徙的Rhinogobius sp。
DOI：
10.1007/s102280200049
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发表时间：
2002
影响因子：
1.2
通讯作者：
T. Okazaki
中科院分区：
文献类型：
--
作者：
Sachiko Takahashi;T. Okazaki
在Rhinogobius属的“yoshinobori”物种复合体中看到的各种生活史策略，从生态上被划分为两栖、河流和湖泊类型。在琵琶湖水系中，存在两种湖泊形式，一种是新发现的独有的Lentic形式，另一种是众所周知的Rhinogobiussp。或者，通常经历湖泊-河流迁徙，但也包括与以前的Lenti型动物共享产卵场所的Lentic个体。详细的形态比较和等位酶分析表明，这两种类型之间始终存在明显的差异，表明它们是不同的物种。新发现的Lenti型具有许多独特的形态特征，使其能够与sympatricRhinogobiussp.区分开来。或：矮小，短吻，纵向细长的腹鳍，未发育的系带和低板，成年男性第一背鳍较低，尾柄深度较小，背侧和腹侧无鳞，感觉管不完整。隐翅型暂定名为Rhinogobiussp.BW.湖栖种群的生活史模式被分为两类：一种是湖泊-河流迁徙的生活方式，另一种是完全不变的生活方式。
The various life history strategies seen within the “yoshinobori” species complex of the genusRhinogobius, which differentiated from an amphidromous ancestor, have been grouped ecologically into amphidromous, fluvial, and lacustrine types. In the Lake Biwa water system, two lacustrine forms exist, a newly discovered, exclusively lentic form and the already well knownRhinogobiussp. OR, which generally undergoes lake–river migration but also includes lentic individuals that share spawning grounds with the former lentic form. Detailed morphological comparisons and allozyme analysis revealed consistently clear differences between the two forms, indicating them to be distinct species. The newly discovered lentic form has many distinctive morphological features that enable it to be distinguished from sympatricRhinogobiussp. OR: dwarfness, short snout, longitudinally slender pelvic fin, undeveloped frenum with a low lamella, low first dorsal fin in adult males, lesser caudal peduncle depth, scaleless predorsal and ventral areas, and incomplete sensory canals. The lentic form was temporarily namedRhinogobiussp. BW. The life history patterns of the lake-inhabiting populations were separated into two categories: a lake–river migratory lifestyle and an exclusively lentic lifestyle.