Počet záznamů: 1
Variation in sperm morphology among Afrotropical sunbirds
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SYSNO ASEP 0457923 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Variation in sperm morphology among Afrotropical sunbirds Tvůrce(i) Omotoriogun, T. C. (NG)
Laskemoen, T. (NO)
Rowe, M. (NO)
Albrecht, Tomáš (UBO-W) RID, SAI, ORCID
Bowie, R. C. K. (US)
Sedláček, O. (CZ)
Hořák, D. (CZ)
Ottosson, U. (NG)
Lifjeld, J. T. (NO)Celkový počet autorů 9 Zdroj.dok. Ibis. - : Wiley - ISSN 0019-1019
Roč. 158, č. 1 (2016), s. 155-166Poč.str. 12 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova comparative analysis ; Nectariniidae ; phylogenetic signal ; sperm competition ; sperm size Vědní obor RIV EG - Zoologie Institucionální podpora UBO-W - RVO:68081766 UT WOS 000368727700014 EID SCOPUS 84950327457 DOI 10.1111/ibi.12334 Anotace Birds show considerable variation in sperm morphology. Closely related species and subspecies can show diagnostic differences in sperm size. There is also variation in sperm size among males within a population, and recent evidence from passerine birds suggests that the coefficient of inter-male variation in sperm length is negatively associated with the level of sperm competition. Here we examined patterns of inter- and intra-specific variation in sperm length in 12 species of sunbird (Nectariniidae) from Nigeria and Cameroon, a group for which such information is extremely limited. We found significant variation among species in sperm total length, with mean values ranging from 74 micrometre to 116 micrometre, placing these species within the short to medium sperm length range for passerine birds. Most of this variation was explained by the length of the midpiece, which contains the fused mitochondria and is an important structure for sperm energetics. Relative midpiece length was negatively correlated with the coefficient of inter-male variation in sperm total length across species, suggesting that sperm competition may have selected for greater midpiece length in this group. We also mapped sperm lengths onto a time-calibrated phylogeny and found support for a phylogenetic signal in all sperm length components, except head length. A test of various evolutionary or tree transformation models gave strongest support for the Brownian motion model for all sperm components, i.e. divergences were best predicted by the phylogenetic distance between lineages. The coefficients of inter-male variation in sperm total length indicate that sperm competition is high but variable among sunbird species, as is the case with passerine birds at large.
Pracoviště Ústav biologie obratlovců Kontakt Hana Slabáková, slabakova@ivb.cz, Tel.: 543 422 524 Rok sběru 2017
Počet záznamů: 1