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題 名 | Development and Regeneration of Petasma with Reference to Gonadal Development in Penaeid Shrimps=對蝦雄性交接器之發育及再生與生殖腺發育之關係 |
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作 者 | 林明男; | 書刊名 | 臺灣水產學會刊 |
卷 期 | 18:2 1991.06[民80.06] |
頁 次 | 頁145-154 |
分類號 | 387.13 |
關鍵詞 | 生殖腺; 再生; 發育; 雄性交接器; 對蝦; |
語 文 | 英文(English) |
中文摘要 | 為了解蝦類雄蝦交接器發育、再生與性腺發育的關連性並探討其在交尾時所扮演的角色而實施本研究工作,並將結果簡述如下: 依據 Motoh(1981)將交接器發育情形改分為I,II,III等三期。II期雖左右弁已相連結,但生殖巢尚未達成熟階段,GSI值還低,精莢還未發育,故第五對步腳基部呈透明,少數具有精莢,但其重量輕,所含精子數也少,無法交尾。至III期時其交接器外形及精巢均已達到完熟階段,GSI值已達高峰,第五對步腳基部呈乳白色,精莢已完熟且重量大增,精子數也相當多在10×106以上,已可做為親(種)蝦。當雄性交接器切除後無法獲得交尾母蝦,必須等其再生成為III期才能再得到交尾母蝦,足證交接器實為促成交尾期精莢轉移必要器官之一,且為承接精莢之主要機構。證實Hong(1977)之假設。 交接器經切除後能再生,除在Motoh之A期外其餘各期皆經由脫殼而逐漸發育而成。紅尾蝦經47天可發育成II期,第113天可再發育成III期,此時即可做為親(種)蝦用。 |
英文摘要 | The development of petasma in Penaeus monodn, P. penicillatus and P. vannamei are divded into three stages, namely I, the initial stage when each side of petasmal endopods of the first pair of pleopods are still small without contact in the midline; II, the petasma nearly at subadult stage in shape and character, the two halves are large enough to connect to each other, but separated easily by physical force; and III, the petasma at adult stage in shape and character, when the connected two halves are firmly attached. The mature males at the stage III have developed gonads as indicated by having a high gonad somatic index, white coax at fifth walking legs, and large mature spermatophores inside the vesicular seminalis. At this stage the number of spermatozoa increases to 10×104 cells in each spermatophore. When petasma-ablated males where in stock with adult female P. penicillatus, copulation did not take place between them. The males transferred spermatophores into females' thelyca only after the ablated petasmas regenerated to the stage III. Therefore, the petasma is one of the essential organs either involving in copulation or transference of spermatophores. After ablation, petasma regenerates gradually from I to III stage following several moltings. |
本系統中英文摘要資訊取自各篇刊載內容。