Počet záznamů: 1
Latitudinal variation in sexual dimorphism in life-history traits of a freshwater fish
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SYSNO ASEP 0479372 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Latitudinal variation in sexual dimorphism in life-history traits of a freshwater fish Tvůrce(i) Estlander, S. (FI)
Kahilainen, K.K. (FI)
Horppila, J. (FI)
Olin, M. (FI)
Rask, M. (FI)
Kubečka, Jan (BC-A) RID, ORCID
Peterka, Jiří (BC-A) RID, ORCID
Říha, Milan (BC-A) RID, ORCID
Huuskonen, H. (FI)
Nurminen, L. (FI)Celkový počet autorů 10 Zdroj.dok. Ecology and Evolution. - : Wiley - ISSN 2045-7758
Roč. 7, č. 2 (2017), s. 665-673Poč.str. 9 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova Bergmann's rule ; growth ; perch ; Rensch's rule ; sexual maturity Vědní obor RIV EH - Ekologie - společenstva Obor OECD Marine biology, freshwater biology, limnology Institucionální podpora BC-A - RVO:60077344 UT WOS 000392075300018 EID SCOPUS 85007373598 DOI 10.1002/ece3.2658 Anotace Sexual dimorphism is common across the animal kingdom, but the contribution of environmental factors shaping differences between the sexes remains controversial. In ectotherms, life-history traits are known to correlate with latitude, but sex-specific responses are not well understood. We analyzed life-history trait variation between the sexes of European perch (Perca fluviatilis L.), a common freshwater fish displaying larger female size, by employing a wide latitudinal gradient. We expected to find sex-dependent latitudinal variation in life-history variables: length at age, length increment, and size at maturity, with females showing consistently higher values than males at all latitudes. We further anticipated that this gender difference would progressively decrease with the increasingly harsh environmental conditions toward higher latitude. We hypothesized that growth and length increment would decrease and size/age at maturity would increase at higher latitudes. Our results confirmed female-biased sexual size dimorphism at all latitudes and the magnitude of sexual dimorphism diminished with increase in latitude. Growth of both sexes decreased with increase in latitude, and the female latitudinal clines were steeper than those of males. Hence, we challenge two predominant ecological rules (Rensch's and Bergmann's rules) that describe common large-scale patterns of body size variation. Our data demonstrate that these two rules are not universally applicable in ectotherms or female-biased species. Our study highlights the importance of sex-specific differences in life-history traits along a latitudinal gradient, with evident implications for a wide range of studies from individual to ecosystems level. Pracoviště Biologické centrum (od r. 2006) Kontakt Dana Hypšová, eje@eje.cz, Tel.: 387 775 214 Rok sběru 2018
Počet záznamů: 1