Comparison of the reproductive cycles of two cryptic soles in the Adriatic Sea

IF 2.2 2区农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE

Animal Reproduction Science Pub Date : 2025-03-04 DOI:10.1016/j.anireprosci.2025.107817

Laura Sabatini , Fortunata Donato , Mario La Mesa , Emanuela Fanelli , Giuseppe Scarcella

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Abstract

In the Adriatic Sea, two congeneric and cryptic soles coexist and share the same habitats. They are the common sole, Solea solea, one of the main Mediterranean fishery resources, and the Egyptian sole, Solea aegyptiaca. The present study investigated and compared their reproductive biology to obtain updated and original information useful for explaining their coexistence as distinct and reproductively isolated species and supporting stock assessment and management measures. The comparison of the reproductive cycle and strategy revealed similar and distinctive traits. Histological analysis indicated that both species had asynchronous ovaries and were batch-spawners. On the other hand, spawning activities occurred in late autumn or late winter-early spring in S. solea and S. aegyptiaca, respectively. Such a different reproductive timing may contribute to their sexual isolation and genetic distinction. Other pre-zygotic isolating processes have been hypothesized to act by preventing mating, such as the involvement of olfactory sense for intraspecific recognition. Fecundity estimates were similar between the two species (mean potential fecundity: 323,122 for S. aegyptiaca and 210,752 for S. solea, P > 0.05), but the oocytes produced by S. aegyptiaca were significantly smaller than those of S. solea. This study contributed to shedding light on the reproductive traits that may support the coexistence of these congeneric species and encouraged future investigations to understand their fitness in the Adriatic Sea.

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亚得里亚海两种隐底鱼繁殖周期的比较

在亚得里亚海，两种相同的和隐底共存并共享相同的栖息地。它们是地中海主要渔业资源之一的普通鳎（Solea Solea）和埃及鳎（Solea aegyptiaca）。本研究对它们的生殖生物学进行了调查和比较，以获得最新的原始信息，有助于解释它们作为独特的和生殖隔离的物种共存，并为种群评估和管理措施提供支持。生殖周期和策略的比较显示出相似和不同的特征。组织学分析表明，这两个物种都具有非同步卵巢和批量产卵。另一方面，古鲽鱼和埃及斑鱼的产卵活动分别发生在秋末或冬末-早春。这种不同的繁殖时间可能导致它们的性隔离和遗传差异。其他合子前分离过程被假设为通过阻止交配而起作用，例如参与种内识别的嗅觉。两个物种的繁殖力估计相似（埃及伊蚊的平均潜在繁殖力为323,122，埃及伊蚊的平均潜在繁殖力为210,752,P >； 0.05），但埃及伊蚊产生的卵母细胞明显小于非洲伊蚊。这项研究有助于揭示可能支持这些同源物种共存的生殖特征，并鼓励未来的研究了解它们在亚得里亚海的适应性。

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来源期刊

Animal Reproduction Science 农林科学-奶制品与动物科学

CiteScore

4.50

自引率

9.10%

发文量

136

审稿时长

54 days

期刊介绍： Animal Reproduction Science publishes results from studies relating to reproduction and fertility in animals. This includes both fundamental research and applied studies, including management practices that increase our understanding of the biology and manipulation of reproduction. Manuscripts should go into depth in the mechanisms involved in the research reported, rather than a give a mere description of findings. The focus is on animals that are useful to humans including food- and fibre-producing; companion/recreational; captive; and endangered species including zoo animals, but excluding laboratory animals unless the results of the study provide new information that impacts the basic understanding of the biology or manipulation of reproduction. The journal''s scope includes the study of reproductive physiology and endocrinology, reproductive cycles, natural and artificial control of reproduction, preservation and use of gametes and embryos, pregnancy and parturition, infertility and sterility, diagnostic and therapeutic techniques. The Editorial Board of Animal Reproduction Science has decided not to publish papers in which there is an exclusive examination of the in vitro development of oocytes and embryos; however, there will be consideration of papers that include in vitro studies where the source of the oocytes and/or development of the embryos beyond the blastocyst stage is part of the experimental design.