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Compensatory growth for free? A field experiment on brown trout, Salmo trutta


, : Compensatory growth for free? A field experiment on brown trout, Salmo trutta. Oikos ober; 111(1): 31-38

Laboratory studies suggest that animals may be capable of compensatory growth after periods of food shortage. There is, however, a lack of field experiments investigating the incidence and consequences of compensatory growth in the wild, and the relevance of compensatory responses in natural populations has recently been questioned. Here we addressed the hypotheses that (1) food restriction during critical growth periods can induce compensatory growth, and (2) that compensatory growth is associated with delayed costs in natural populations. These hypotheses were addressed by (1) manipulating the food intake of brown trout in spring, (2) measuring growth rate responses over the first month following release, and (3) measuring growth and mortality (i.e. recapture rate) over the subsequent fall and winter. We found that brown trout restored lost body weight and condition within a month, providing the first experimental demonstration of compensatory growth in the wild. However, no delayed costs of the compensatory response could be detected within the timespan of the experiment. We suggest that wild brown trout have an adapted "buffer capacity" to withstand fluctuations in food supply, allowing restoration of lost lipid reserves when feeding conditions improve. However, when prolonged food deprivation affect structural components, compensation may not be possible without compromising long-term performance.

US$19.90

DOI: 10.1111/j.0030-1299.2005.13972.x


Other references

van Swieten, H.A.; Ernst, J.M.; Vermeulen, F.E., 1995: Heart surgery and surgical mortality in 1982 and 1992 in the St. Antonius Ziekenhuis, Nieuwegein. Are indication criteria changing?. To determine the changes in the open heart surgical procedures and hospital mortality between 1982 and 1992. Retrospective investigation. St. Antonius Hospital, Nieuwegein. A comparison of the open heart surgical procedures, the hospital mortality...

Edwards, S.; Birks, M.; Chapman, Y.; Yates, K., 2016: Miscarriage in Australia: The geographical inequity of healthcare services. Complications in early pregnancy can lead to pregnancy loss (miscarriage) and ultimately the presentation of a woman to their local emergency department (ED). Miscarriage is a common occurrence, with one in six pregnancies resulting in pregnancy l...

Kumazawa Mineo, 1968: Preferred orientation of pyrite, ice quartz, olivine, and hornblende by recrystallization under stress. Transactions - American Geophysical Union 49(1): 303

Azizbekova, N.S. ; Milyaeva, E.L.; Lobova, N.V.; Chailakhyan, M.K., 1978: Effect of gibberellin and kinetin on the formation of saffron floral organs. The treatment of dry bulbs of saffron [Crocus sativus] with gibberellin and kinetin stimulated the processes of growth and development thereupon: the acceleration of bolting, the lengthening of leaves and roots and the formation of auxilliary flow...

Kienast, T.; Heinz, A., 2006: Dopamine and the diseased brain. Dysfunction of central dopaminergic neurotransmission has been implicated in a series of neuropsychiatric disorders, including Tourette's syndrome, schizophrenia, and drug and alcohol dependence. The behavioral and psychopathological manifest...

Gadzhiev, S.A., 1961: On intralobar sequestration of the lung. Khirurgiia 37: 25-29

Babis H., 1979: Diversity of embryo development in delphinium genus part 1 the zygote divides transversely embryogenesis in delphinium staphisagria and delphinium elatum. In D. staphisagria and D. elatum the zygote divides transversely. The tetrad is 3-tiered. Destination of the apical cell, ca, and of the basal cell, cb, was determined. In D. consolida embryogenesis is of a similar type yet the destination of ca a...

Usmanova, AZ.; Ikramov, A., 1979: Nematodes of some cucurbitaceous cultures of the Dzhizak Province.. Uzbekskii Biologicheskii Zhurnal, 3: 65-67

Maciejewski-Lenoir, D.; Heinrichs, S.C.; Liu, X.J.; Ling, N.; Tucker, A.; Xie, Q.; Lappi, D.A.; Grigoriadis, D.E., 2000: Selective impairment of corticotropin-releasing factor1 (CRF1) receptor-mediated function using CRF coupled to saporin. CRF is the main component in the brain neuropeptide effector system responsible for the behavioral, endocrine, and physiological activation that accompanies stress activation. Reduced CRF system activation plays a role in the etiology of a variety...

Mccarron D., 1986: Calcium influx of isolated enterocytes in adult shrs and wkys. American Heart Association Monograph: Ii-331