英国威廉王子湾发现的章鱼新种——褶皱巨型太平洋章鱼的身体图案

IF 0.4 4区 生物学 Q4 MARINE & FRESHWATER BIOLOGY
Nathan Hollenbeck, D. Scheel
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引用次数: 2

摘要

摘要:我们测试了阿拉斯加威廉王子湾大章鱼的身体模式是否区分了两种单倍型。对圈养的活章鱼进行了拍照,并根据是否存在纵向地幔褶皱(巨型太平洋章鱼(GPO)的一种特征身体模式特征,即多氏肠杆菌(Wülker 1910))(GPO形态型,N=14)或不存在(一种新的形态型,N=6)将其分为形态型。新型形态型章鱼与GPO形态型章鱼的区别在于存在侧地幔褶皱和不存在纵向地幔褶皱、侧褶皱下方的腹侧地幔纹理以及斑块和凹槽图案。附加的性状可以组合使用来可靠地表征新的形态类型。这些章鱼的遗传单倍型是根据两个微卫星基因座和部分OCDE基因的核苷酸序列数据确定的。根据体型特征与该物种已发表的描述的匹配以及其遗传单倍型与已发表的E.dofleini序列的匹配,用E.dofleni鉴定了GPO形态型。新的形态型体型与北太平洋东部任何物种的描述都不匹配,而其遗传单倍型与最近测序的一种未描述的章鱼的基因单倍型匹配。GPO和新的形态类型是姐妹分支,体型特征可靠地将个体鉴定为形态类型和单倍型。体型特征可用于现场识别活章鱼,从而进行种群评估、副渔获物频率估计以及对这两种章鱼类型的其他研究。我们为这种新的形态类型提供了褶皱巨型太平洋章鱼的通用名称,根据遗传和形态学数据,该分支是肠章鱼属大型太平洋章鱼的一个新种。完整的物种描述还有待完成。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Body Patterns of the Frilled Giant Pacific Octopus, a New Species of Octopus from Prince William Sound, AK
Abstract: We tested whether body patterns distinguished two haplotypes of large octopus in Prince William Sound Alaska. Live octopuses were photographed in captivity and assigned to a morphotype based on whether longitudinal mantle folds (a characteristic body pattern feature of the giant Pacific octopus (GPO), Enteroctopus dofleini (Wülker 1910)) were present (the GPO morphotype, N = 14) or absent (a novel morphotype, N = 6). Novel morphotype octopuses were distinguished without exception from GPO morphotype octopuses by the presence of a lateral mantle frill and the absence of longitudinal mantle folds, ventral mantle texture below the lateral frill, and patch and groove patterning. Additional traits could be used in combination to reliably characterize the novel morphotype. The genetic haplotypes of these octopuses were determined from nucleotide sequence data from two microsatellite loci and a portion of the OCDE gene. The GPO morphotype was identified with E. dofleini based on the match of body pattern traits to published descriptions of that species and the match of its genetic haplotype to published sequences of E. dofleini. Novel morphotype body patterns did not match descriptions of any species from the eastern north Pacific, while its genetic haplotype matched that of a recently sequenced undescribed octopus. The GPO and novel morphotypes are sister clades, and body pattern traits reliably identified individuals to morphotype and haplotype. Body pattern traits can be used in field identification of live octopuses allowing population assessments, by-catch frequency estimates, and other studies of both octopus types. We offer the common name of the frilled giant Pacific octopus for the novel morphotype, and based on genetic and morphological data suggest this clade is a new species of large Pacific octopus in the genus Enteroctopus. A full species description remains to be done.
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来源期刊
CiteScore
1.00
自引率
40.00%
发文量
1
审稿时长
>12 weeks
期刊介绍: The American Malacological Bulletin serves as an outlet for reporting notable contributions in malacological research. Manuscripts concerning any aspect of original, unpublished research,important short reports, and detailed reviews dealing with molluscs will be considered for publication. Recent issues have included AMS symposia, independent papers, research notes,and book reviews. All published research articles in this journal have undergone rigorous peer review, based on initial editor screening and anonymous reviewing by independent expertreferees. AMS symposium papers have undergone peer review by symposium organizer, symposium participants, and independent referees.
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