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Role of intraspecific competition in intrinsic growth rate regulation in anOikopleura dioica(Tunicata) population
Li, Shuai1,2; Zhang, Guangtao1,2,3
2020-07-08
Source PublicationJOURNAL OF OCEANOLOGY AND LIMNOLOGY
ISSN2096-5508
Pages14
AbstractPlanktonicOikopleura dioicarespond almost instantly to opportunistic algal blooms, but it is unknown whether the population increase can change from an exponential to a logistic model to avoid a final sudden collapse. To test the hypothesis that intraspecific competition regulates the intrinsic rate of natural increase (r), density-dependent effects on growth and reproduction performance were investigated inO. dioicavia laboratory incubations. Over a large food concentration range, batch maturation was observed above the per capita food supply (PFS) of 8.1 mu gC/ind. in 4.5 d. Somatic growth was saturated beyond this PFS value, whereas gonad length increased continuously. Below this threshold, individuals reached small body and gonad lengths, and maturation was rarely observed during the incubation period. The gonad/body volume and maturation ratios also increased with the PFS. Instead of the food concentration, thervalues were regulated by competition pressure via variability in maturation duration and the proportion of mature individuals in the cohorts. When the minimum food demand was satisfied in the designated generation time, thervalue tended to be regulated by the spawning proportion in the population. Otherwise, prolonged development duration and decreasedrvalues were expected.
KeywordOikopleura dioica population size intraspecific competition growth fecundity r(max)
DOI10.1007/s00343-020-0071-0
Indexed BySCI
Language英语
Funding ProjectStrategic Priority Research Program of the Chinese Academy of Sciences[XDA23050401] ; National Key Research and Development Program of China[2017YFE0111100] ; National Key Basic Research Program of China (973 Program)[2015CB452903] ; Science and Technology Service Network (STS)[Y82346101L] ; Taishan Scholars Project
WOS Research AreaMarine & Freshwater Biology ; Oceanography
WOS SubjectLimnology ; Oceanography
WOS IDWOS:000546525000006
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/167844
Collection胶州湾海洋生态系统国家野外研究站
Corresponding AuthorZhang, Guangtao
Affiliation1.Chinese Acad Sci, Inst Oceanol, Jiaozhou Bay Natl Marine Ecosyst Res Stn, Qingdao 266071, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Li, Shuai,Zhang, Guangtao. Role of intraspecific competition in intrinsic growth rate regulation in anOikopleura dioica(Tunicata) population[J]. JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2020:14.
APA Li, Shuai,&Zhang, Guangtao.(2020).Role of intraspecific competition in intrinsic growth rate regulation in anOikopleura dioica(Tunicata) population.JOURNAL OF OCEANOLOGY AND LIMNOLOGY,14.
MLA Li, Shuai,et al."Role of intraspecific competition in intrinsic growth rate regulation in anOikopleura dioica(Tunicata) population".JOURNAL OF OCEANOLOGY AND LIMNOLOGY (2020):14.
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