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이후승 (Who-Seung Lee) 저자 이메일 보기
University of Glasgow, 현 University of Quebec
조회 3866  인쇄하기 주소복사 트위터 공유 페이스북 공유 
The pattern of early growth trajectories affects adult breeding performance

Who-Seung Lee1, Pat Monaghan and Neil B. Metcalfe

Institute of Biodiversity, Animal Health and Comparative Medicine, College of Medical, Veterinary and Life Sciences, Graham Kerr Building, University of Glasgow, Glasgow G128QQ United Kingdom

1Present address: Departement des Sciences Biologiques, Universite du Quebec a Montreal, Montreal, Quebec H3C?3P8 Canada.

Corresponding Editor: A. S. Flecker.

Early environmental conditions can influence the pattern of growth and development. While poor conditions generally cause slower growth, normal adult size can still be reached if growth accelerates or is prolonged once conditions improve, but such catch-up growth may have deleterious effects later in life. Here we investigate for the first time how decelerating as well as accelerating growth trajectories, manipulated independently of food supply, affect subsequent breeding performance. In order to alter growth rates we subjected juvenile three-spined sticklebacks Gasterosteus aculeatus to a short period of altered environmental temperature (high, intermediate, or low), after which all fish had the same (intermediate) temperature regime. In addition, the perceived time stress (until the onset of the spawning season) was manipulated by conducting the experiment twice (in the winter and in the spring immediately prior to breeding) and by exposing half of the fish in each experiment to a delayed photoperiod (two months behind ambient). We found that fish showed full growth compensation, such that in all treatments they were of the same average size by the start of the breeding season. However, those compensating for low temperatures earlier in life (i.e., who then showed an accelerated growth trajectory) had reduced reproductive investment over the following two breeding seasons (males, reduced sexual ornaments and speed of building nests; females, reduced first clutch size, mean egg size, and eggs produced per year). Moreover, these deleterious effects were strongest when the perceived time available for growth compensation prior to breeding was shortest. In contrast, those fish with a decelerating growth trajectory as a result of exposure to high temperatures early in life showed an improved breeding performance compared to steadily growing controls. These results clearly demonstrate that both the shape of the growth trajectory (independent of food supply) and the time available for growth compensation have broad-reaching and prolonged effects on breeding performance, with ecological conditions that prompt catch-up growth just prior to the breeding season being especially damaging for both sexes.

Key words: compensatory growth;, Gasterosteus aculeatus, investment, life history, phenotypic plasticity, reproduction, temperature, three-spined stickleback, trade-off

논문정보 F1000선정
- 형식: Research article
- 게재일: 2012년 04월 (BRIC 등록일 2012-05-10)
- 연구진: 국외연구진
- 분야: Ecology
- 추천: Faculty of 1000 Biology
- 추천사유: Faculty of 1000 evaluations, dissents and comments for [Lee W et al. The pattern of early growth trajectories affects adult breeding performance. Ecology. 2012; 93(4):902-12; doi: 10.1890/11-0890.1]. Faculty of 1000, . F1000.com/715047803
관련 인터뷰
1. 논문관련 분야의 소개, 동향, 전망을 설명, 연구과정에서 생긴 에피소드환경변화는 생물의 성장에 영향을 줍니다. 특히 성장 속도와 성장 곡선(=패턴)의 변화는 성장과정 뿐만 아니라 장기적으로 번식과 수명에까지 영향을 줄 수 있습니다. 그러나 왜, 어떠한 과정을 통해서 어린시기의 성장속도가 생활사 전반에 걸쳐서 영향을 주는지에 대해서는 아직 잘 알려지지 않았습니다. 소위 catch-up growth로 알려져 있는 compensatory growth는 생물의 전...
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