Muscles of Mastication and the Temporo-Mandibular Joint of the Saimaa (Pusa hispida saimensis) and Baltic (Pusa hispida botnica) Ringed Seals

IF 0.9 4区生物学 Q4 ECOLOGY

Annales Zoologici Fennici Pub Date : 2020-05-14 DOI:10.5735/086.057.0103

J. Laakkonen, J. Jernvall

引用次数: 3

Abstract

As part of our research aiming to understand the morphological variation in ringed seals, we dissected mastication muscles of nine Saimaa ringed seals and two Baltic ringed seals. We found no significant differences in the muscles of mastication between these subspecies but the location of the tympanic bulla in relation to the articular surface of the temporomandibular joint was more medial in the Saimaa ringed seal. As compared with the previously studied Baikal and Caspian seals, the origin of the jaw-opening digastricus muscle covered less of the tympanic bulla in the Saimaa and Baltic ringed seals. Our data on masticatory-muscle masses indicated that similarly to terrestrial mammal species, the growth patterns of mastication muscles of the Saimaa ringed seal differed from each other according to the body size.

查看原文本刊更多论文

咀嚼肌肉和舌斑海豹和波罗的海斑海豹的颞下颌关节

为了了解环斑海豹的形态差异，我们解剖了9只塞马环斑海豹和2只波罗的海环斑海豹的咀嚼肌肉。我们发现在这些亚种之间咀嚼肌肉没有显著差异，但鼓室球相对于颞下颌关节表面的位置在Saimaa环状密封中更靠近内侧。与之前研究过的贝加尔湖海豹和里海海豹相比，塞马海海豹和波罗的海环斑海豹的双膈肌的起源覆盖了较少的鼓室。我们的咀嚼肌肉质量数据表明，与陆生哺乳动物相似，塞马环海豹咀嚼肌肉的生长模式因体型而异。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Annales Zoologici Fennici 生物-动物学

CiteScore

2.40

自引率

14.30%

发文量

审稿时长

>12 weeks

期刊介绍： Annales Zoologici Fennici publishes mainly original research reports, but also in-depth reviews and commentaries on all aspects of animal ecology and evolution, and fields related to them. Our aim is to promote papers which focus on the interactions among various components in the past and present environments by using integrative and cross-disciplinary approaches. This may be achieved by employing tools from different fields of research, such as (but not restricted to): ecology and paleoecology, molecular ecology and phylogeography, conservation biology, human-induced contemporary evolution and wildlife management, animal behaviour and interactions (including recognition systems and mechanisms), paleontology (except systematics and taxonomy) and evolution, bioenergetics.