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題 名 | Resource Limitation Underlying Reproductive Strategies of Coral Reef Fishes: A Hypothesis=資源限制主導珊瑚礁魚類的生殖策略:一個新的假說 |
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作 者 | 詹榮桂; | 書刊名 | 動物研究學刊 |
卷 期 | 39:3 2000.07[民89.07] |
頁 次 | 頁266-274 |
分類號 | 387.1056 |
關鍵詞 | 雀鯛; 巢; 生殖; 產卵; 領域性; Damselfish; Nest; Reproduction; Spawning; Territoriality; |
語 文 | 英文(English) |
中文摘要 | 珊瑚礁魚類產卵的方式往往因種而異,其中底棲性卵產卵者首漂浮性卵產卵者無論是在魚種數目上或是在個體數上,都佔有最重要的地位。本文在此提出一個新的假說,以解釋這些底棲性卵產卵者以及漂浮產卵者的生殖策略。這個假說是建立在兩個基本假定上。(一)產底棲性卵是珊瑚礁魚類進化的方向。(二)在珊瑚礁環境中,魚類能夠用以構築生殖巢的資源(也就是基質)是有限的。因此資源上的限制是造成採取不同生殖策略的主要因素。根據此一假說可推論:能成功的獲取築巢基質的魚類將產底棲卵,無法獲得合適基質的魚種則仍產漂浮性卵。基於這個假說所推演出來的預測與許多魚類生殖的現狀相符合,因此這個「資源限制說」可用來補充說明目前珊瑚礁中不同的魚種何以會發生有不同的生殖類型。 |
英文摘要 | A wide variety of complex spawning systems occurs in coral reef fishes. Among them, the demersal spawners and pelagic spawners are dominant in terms of both numbers of taxonomic groups and individuals. Here I propose a hypothesis to explain the reproductive strategies of these demersal and pelagic spawners. This hypothesis is based on 2 primary assumptions: that coral-reef fishes are selected to spawn demersal eggs; and that the nesting resource (i.e., substrate) is limited in the environment. Thus resource limitation is assumed to be the prime factor accounting for different spawning strategies. This hypothesis postulates that fishes which succeed in obtaining appropriate nesting substrates will spawn demersally, whereas those that fail to obtain suitable sites tend to spawn pelagically. Predictions from this resource-limitation hypothesis are in accord with many aspects of the available data. Therefore this hypothesis might be proposed as an alternative to established hypotheses to explain how different spawning patterns of coral reef fishes have occurred. |
本系統中英文摘要資訊取自各篇刊載內容。