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Comparative transcriptome analysis of abalone Haliotis discus hannai with green and gray egg colors

Journal of Oceanology and Limnology 2021年第1期39卷 350-361页

作者： Yanwei FENG Bo YUAN Xu JIANG Xiangquan LIU Zan LI Guohua SUN Xiaohui XU School of Agriculture Ludong UniversityYantai 264025China Shandong Provincial Key Laboratory of Restoration for Marine Ecology Shandong Marine Resource and Environment Research InstituteYantai 264006China National Demonstration Center for Experimental Fisheries Science Education Shanghai Ocean UniversityShanghai 201306China Shanghai Engineering Research Center of Aquaculture Shanghai Ocean UniversityShanghai 201306China Shandong Rice Research Institute Shandong Academy of Agricultural SciencesJinan 250100China

Haliotis discus hannai is an important marine economic species in *** egg color was found to be associated with economic traits,which provides a new idea for ***,the molecular mechanism of the egg-color formation has not been ***,the pigment composition and comparative transcriptome analyses of *** hannai with green and gray egg color were conducted using high-performance liquid chromatography(HPLC)and RNA-Seq *** show that individuals with green and gray eggs both possess the *** existed in gray-egged individuals,but not in green-egged *** transcriptome analysis,272310 unigenes were received from 461162 transcripts with a mean length of 985 bp and N50 of 1524 bp,respectively.A total of 185 unigenes were identifi ed as diff erentially expressed genes(DEGs).The DEGs involved in“fl avin-containing compound metabolic process”,“melanosome”,“glutathione metabolism”,and“cytochrome b6f complex”were likely related to the formation of the egg *** results provide foundational information for the functional analysis of egg-color related genes and are benefi cial to the selective breeding of *** hannai.

关键词： Haliotis discus hannai egg color high-performance liquid chromatography transcriptome diff erentially expressed genes

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Why cuckoos should parasitize parrotbills by laying eggs randomly rather than laying eggs matching the egg appearance of parrotbill hosts?

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Chinese Birds 2015年第2期6卷 53-59页

作者： Canchao Yang Fugo Takasu Wei Liang Anders P Moller Ministry of Education Key Laboratory for Tropical Plant and Animal Ecology College of Life SciencesHainan Normal University Department of Information and Computer Sciences Nara Women’s University Laboratoired’Ecologie Systématique et EvolutionCNRS UMR 8079Universite Paris-Sud

The coevolutionary interaction between cuckoos and their hosts has been studied for a long time, but to date some puzzles still remain unsolved. Whether cuckoos parasitize their hosts by laying eggs randomly or matching the egg morphs of their hosts is one of the mysteries of the cuckoo problem. Scientists tend to believe that cuckoos lay eggs matching the appearance of host eggs due to selection caused by the ability of the hosts to recognize their own *** this paper, we first review previous empirical studies to test this mystery and found no studies have provided direct evidence of cuckoos choosing to parasitize host nests where egg color and pattern match. We then present examples of unmatched cuckoo eggs in host nests and key life history traits of cuckoos, e.g. secretive behavior and rapid egg-laying and link them to cuckoo egg laying behavior. Finally we develop a conceptual model to demonstrate the egg laying behaviour of cuckoos and propose an empirical test that can provide direct evidence of the egg-laying properties of female cuckoos. We speculate that the degree of egg matching between cuckoo eggs and those of the host as detected by humans is caused by the ability of the hosts to recognize their own eggs, rather than the selection of matching host eggs by cuckoos. The case of Common Cuckoos(Cuculus canorus) and their parrotbill hosts(Paradoxornis alphonsianus), where it has been shown that both have evolved polymorphic eggs(mainly blue and white), was used to develop a conceptual model to demonstrate why cuckoos should utilize parrotbill hosts by laying eggs randomly rather than laying eggs matching the appearance of host *** conclusion, we found no evidence for the hypothesis that cuckoos lay eggs based on own egg color matching that of the parrotbill-cuckoo system. We argue theoretically that laying eggs matching those of the hosts in this system violates a key trait of the life history of cuckoos and therefore should be maladaptive.

关键词： Host imprint egg laying behavior egg color Host selection Common cuckoo egg polymorphy

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Recognition and rejection of foreign eggs of different colors in Barn Swallows

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Avian Research 2024年第3期15卷 374-378页

作者： Kui Yan Wei Liang Ministry of Education Key Laboratory for Ecology of Tropical Islands Key Laboratory of Tropical Animal and Plant Ecology of Hainan ProvinceCollege of Life SciencesHainan Normal UniversityHaikou571158China

Brood parasitic birds lay eggs in the nests of other birds,and the parasitized hosts can reduce the cost of raising unrelated offspring through the recognition of parasitic *** can adopt vision-based cognitive mechanisms to recognize foreign eggs by comparing the colors of foreign and host ***,there is currently no uniform conclusion as to whether this comparison involves the single or multiple threshold decision *** this study,we tested both hypotheses by adding model eggs of different colors to the nests of Barn Swallows(Hirundo rustica)of two geographical populations breeding in Hainan and Heilongjiang Provinces in *** showed that Barn Swallows rejected more white model eggs(moderate mimetic to their own eggs)and blue model eggs(highly non-mimetic eggs with shorter reflectance spectrum)than red model eggs(highly nonmimetic eggs with longer reflectance spectrum).There was no difference in the rejection rate of model eggs between the two populations of Barn Swallows,and clutch size was not a factor affecting egg *** results are consistent with the single rejection threshold *** study provides strong experimental evidence that the color of model eggs can has an important effect on egg recognition in Barn Swallows,opening up new avenues to uncover the evolution of cuckoo egg mimicry and explore the cognitive mechanisms underlying the visual recognition of foreign eggs by hosts.

关键词： Barn Swallow egg color Hirundo rustica Multiple rejection threshold Single rejection threshold Visual recognition system

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Visual modeling reveals cryptic aspect in egg mimicry of Himalayan Cuckoo(Cuculus saturatus) on its host Blyth's Leaf Warbler(Phylloscopus reguloides)

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Zoological Research 2011年第4期32卷 451-455页

作者：杨灿朝蔡燕梁伟海南师范大学生命科学学院海南海口571158 中山大学生命科学学院有害生物控制与资源利用国家重点实验室广东广州510275

Brood parasitism and egg mimicry of Himalayan Cuckoo（Cuculus saturatus） on its host Blyth＇s Leaf Warbler（Phylloscopus reguloides） were studied in south-western China from April to July *** cuckoo laid a white egg with fine brown markings on the blunt *** eggs were conspicuously bigger than the host＇s own,with 2.06 g in mass and 1.91 cm3 in *** modeling showed that the cuckoo eggs,which from the human eye appeared to mimic the host eggs to a great extent,were completely different from the host eggs in both hue and *** characters of the Himalayan Cuckoo nestling,reported for the first time,included two triangular and black patches on its gape,which appeared from four days old and became darker with age and *** this character also exists in nestlings of Oriental Cuckoo（***）,it has not been found for other Cuculus *** results reveal cryptic aspects in the cuckoo-host egg color matching,which are not visible to the naked human eye,and indicate that high mimetic cuckoo eggs rejected by hosts,as determined by human observers in previous studies,might not be mimetic as birds see them.

关键词： egg color egg matching Visual modeling Spectrophotometer Cuculus saturatus Phylloscopus reguloides Robinson projection

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Diversity of parasitic cuckoos and their hosts in China

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Chinese Birds 2012年第1期3卷 9-32,72页

作者：杨灿朝梁伟 Anton ANTONOV 蔡燕 Brd G.STOKKE Frode FOSSφY Arne MOKSNES Eivin RφSKAFT 海南师范大学生命科学学院海口571158 生物控制国家重点实验室中山大学生命科学学院广州510275 挪威科技大学生物学系

In this exposé we provide the first review of host use by brood parasitic cuckoos in a multiple-cuckoo system in China, based on our own long-term field data and a compilation of observations obtained from the literature. In total, we found that 11 species of cuckoos utilized altogether 55 host species. These hosts belong to 15 families, in which Sylviidae, Turdidae and Timaliidae account for 22.6%, 20.8% and 17.0% of parasitism records, respectively. The Common Cuckoo (Cuculus canorus) had the widest range of host species, accounting for 45.5% of the total number of parasitized species (25 in 10 families) of all parasitism records and is the most frequent brood parasite in the country. Cuckoo species differed in their egg coloration and the extent of egg polymorphism with most of them, e.g. the Common Cuckoo, the Lesser Cuckoo (C. poliocephalus) and the Plaintive Cuckoo (Cacomantis merulinus) laying well mimetic eggs with respect to their hosts based on human being’s visual observations, while others such as the Large Hawk-cuckoo (C. sparverioides), the Himalayan Cuckoo (C. saturatus) and the Asian Emerald Cuckoo (Chrysococcyx maculatus) usually laid non-mimetic eggs. The use of cuckoo hosts and egg color variation in China are compared with those in other parts of their ranges in Asia.

关键词： brood parasitism egg color host use multiple-cuckoo system egg polymorphism

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