Morphological variations among populations of Bulinus forskalii (Ehrenberg, 1831) from Cameroon

IF 0.8 4区生物学 Q3 ZOOLOGY

Molluscan Research Pub Date : 2023-01-02 DOI:10.1080/13235818.2023.2170160

Parfait Laurent Basga, Romuald Isaka Kamwa Ngassam, P. Nwane, Dili Siddi Ousman Ila, R. Mimpfoundi

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引用次数: 0

Abstract

ABSTRACT Climatic stratification from equatorial rainforest to Sahelian savannah in Cameroon implies successive bioclimatic ecosystems, various natural and artificial situations that may generate morphological and genetic adaptation of populations of Bulinus forskalii (Ehrenberg, 1831) which is widely distributed throughout the country. The present research was undertaken on 955 snails sampled from 12 populations along a south–north transect to investigate morphological variations of shells. Shell colour varied from dark brown to whitish with Sudano–Sahelian shells being brownish through to whitish, shouldered and strongly carinate. Morphometric characters varied greatly from one population to another, with all shell parameters being highly correlated to shell height. Sudano–Sahelian shells were smaller than equatorial shells. From Sangmélima in the equatorial forest region to Marao in the Sudano–Sahelian region a gradual decrease of shell dimensions was apparent, indicating a morphocline. This could reflect the role played by ecological factors on snail population dynamics.

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喀麦隆毛球藻（Ehrenberg，1831）种群的形态变异

摘要喀麦隆从赤道雨林到萨赫勒稀树草原的气候分层意味着连续的生物气候生态系统、各种自然和人为情况，这些情况可能会产生广泛分布在全国各地的毛喉蟾蜍种群的形态和遗传适应（Ehrenberg，1831）。本研究对来自南北样带12个种群的955只蜗牛进行了采样，以调查蜗牛外壳的形态变化。外壳颜色从深棕色到白色不等，苏丹-萨赫勒地区的外壳从棕色到白色，有肩，有强烈的隆凸。不同种群的形态特征差异很大，所有外壳参数都与外壳高度高度高度相关。苏达诺-萨赫勒地区的贝壳比赤道地区的贝壳小。从赤道森林地区的桑梅里马到苏达诺-萨赫勒地区的马劳，外壳尺寸明显逐渐减小，表明存在形态渐变。这可以反映生态因素对蜗牛种群动态的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Molluscan Research 生物-动物学

CiteScore

1.80

自引率

10.00%

发文量

审稿时长

>12 weeks

期刊介绍： Molluscan Research is an international journal for the publication of authoritative papers and review articles on all aspects of molluscan research, including biology, systematics, morphology, physiology, ecology, conservation, biogeography, genetics, molecular biology and palaeontology. While the scope of the journal is worldwide, there is emphasis on studies relating to Australasia and the Indo-west Pacific, including East and South East Asia. The journal’s scope includes revisionary papers, monographs, reviews, theoretical papers and briefer communications. Monographic studies of up to 73 printed pages may also be considered. The journal has been published since 1957 (as the Journal of the Malacological Society of Australia until 1993). It is free to members of the Malacological Society of Australasia and the Society for the Study of Molluscan Diversity.