uu.seUppsala universitets publikationer
Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Compensating for delayed hatching across consecutive life-history stages in an amphibian
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution, Populationsbiologi och naturvårdsbiologi.ORCID-id: 0000-0002-6748-966X
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution, Populationsbiologi och naturvårdsbiologi.
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution, Populationsbiologi och naturvårdsbiologi.
2010 (Engelska)Ingår i: Oikos, ISSN 0030-1299, E-ISSN 1600-0706, Vol. 119, nr 6, s. 980-987Artikel i tidskrift (Refereegranskat) Published
Fritextbeskrivning
Abstract [en]

Environmental conditions experienced early in the ontogeny can have a strong impact on individual fitness and performance later in life. Organisms may counteract the negative effects of poor developmental conditions by developing compensatory responses in growth and development. However, previous studies on compensatory responses have largely ignored the effects that poor embryonic conditions could have during the later life stages. In this study, we examined the effects of artificially delayed development in early life over two later life history transitions by investigating the compensatory growth of larval moor frogs Rana arvalis in response to temperature variation during embryonic development, and the associated costs during the larval 'and postmetamorphic stages. Low temperature during embryonic stage lead to delayed hatching at smaller size. The groups with delayed embryonic development showed strong compensatory growth during the larval stage, and reached similar metamorphic size than the controls in a shorter time. However, the most strongly delayed group was not able to fully catch up the total development time. These compensatory responses were found in the absence of photoperiod cues indicating that the delay in embryonic development was sufficient to initiate the compensatory response in larval growth and development. No apparent costs of compensatory growth were detected in terms of morphology or locomotor performance at the juvenile stage. We found that compensatory responses can be activated as early as at the embryonic stage and extend over several consecutive life history transitions, mitigating the effects of poor conditions experienced early in development. Potential short-term costs in natural environments and the occurrence of long-term costs, which prevent the generalisation of a faster larval life style, are discussed.

Ort, förlag, år, upplaga, sidor
2010. Vol. 119, nr 6, s. 980-987
Nationell ämneskategori
Biologiska vetenskaper
Identifikatorer
URN: urn:nbn:se:uu:diva-136203DOI: 10.1111/j.1600-0706.2009.17956.xISI: 000278036500010OAI: oai:DiVA.org:uu-136203DiVA, id: diva2:376453
Tillgänglig från: 2010-12-10 Skapad: 2010-12-10 Senast uppdaterad: 2018-02-07Bibliografiskt granskad
Ingår i avhandling
1. Physiological and Environmental Processes Influencing Growth Strategies in Amphibian Larvae
Öppna denna publikation i ny flik eller fönster >>Physiological and Environmental Processes Influencing Growth Strategies in Amphibian Larvae
2011 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

Cost and benefits of high individual growth rates are likely to vary across different environments leading to geographic differentiation in growth strategies. In ectotherms, habitats constrained by short growing seasons favour rapid growth and development leading to adaptive latitudinal clines in these traits. Geographic variation in growth strategies should be influenced by physiological variation as well as environmental factors, however many of these mechanisms remain largely unexplored. In my thesis, I studied hormonal correlates of growth strategies, and compensatory responses to phenological variation and environmental stress in anuran tadpoles. I tested the hypotheses that fast growing high latitude common frog Rana temporaria tadpoles have higher growth hormone (GH) expression, and low stress hormone (CORT) elevation in response to predator stress. I found no relationship between GH expression and latitude, but CORT response decreased with latitude after 24 hours of predator exposure. Lower CORT response at high latitude can be adaptive as it may enable the tadpoles to maintain high growth in time constrained habitats. I also found that breeding phenology affected latitudinal variation in growth, development and anti-predator strategies. Northern R. temporaria tadpoles were phenotypically more similar to southern tadpoles when breeding occurred early, suggesting that part of the latitudinal variation is plastic and affected by yearly variation in phenology. When time stress was manipulated by delaying hatching, tadpoles were able to compensate by increasing their development and growth during the larval stage, decreasing the cost of the delayed development. In the final study, I found that northern tadpoles showed stronger compensatory growth during the larval stage than southern tadpoles after being delayed by low food, however, temperature manipulation did not induce differences in the compensatory responses. In general, my results highlight the roles of both environmental and genetic variation in determining individual growth strategies.

Ort, förlag, år, upplaga, sidor
Uppsala: Acta Universitatis Upsaliensis, 2011. s. 46
Serie
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 805
Nyckelord
growth; growth strategies; amphibians; latitudinal gradient; growth hormone (GH); corticosterone (CORT); breeding phenology; compensatory growth; compensatory strategies
Nationell ämneskategori
Biologiska vetenskaper
Forskningsämne
Biologi med inriktning mot populationsbiologi
Identifikatorer
urn:nbn:se:uu:diva-145024 (URN)978-91-554-7998-5 (ISBN)
Disputation
2011-03-18, Lindahlssalen, Norbyvägen 18 B, Uppsala, 09:00 (Engelska)
Opponent
Handledare
Anmärkning
Felaktigt tryckt som Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 735Tillgänglig från: 2011-02-25 Skapad: 2011-02-04 Senast uppdaterad: 2011-03-21

Open Access i DiVA

Fulltext saknas i DiVA

Övriga länkar

Förlagets fulltext

Personposter BETA

Orizaola, German

Sök vidare i DiVA

Av författaren/redaktören
Orizaola, GermanLaurila, Anssi
Av organisationen
Populationsbiologi och naturvårdsbiologi
I samma tidskrift
Oikos
Biologiska vetenskaper

Sök vidare utanför DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetricpoäng

doi
urn-nbn
Totalt: 531 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf