Partial migration: growth varies between resident and migratory fish
نویسندگان
چکیده
منابع مشابه
Partial migration: growth varies between resident and migratory fish.
Partial migration occurs in many taxa and ecosystems and may confer survival benefits. Here, we use otolith chemistry data to determine whether fish from a large estuarine system were resident or migratory, and then examine whether contingents display differences in modelled growth based on changes in width of otolith growth increments. Sixty-three per cent of fish were resident based on Ba : C...
متن کاملEvolutionary Divergence in Brain Size between Migratory and Resident Birds
Despite important recent progress in our understanding of brain evolution, controversy remains regarding the evolutionary forces that have driven its enormous diversification in size. Here, we report that in passerine birds, migratory species tend to have brains that are substantially smaller (relative to body size) than those of resident species, confirming and generalizing previous studies. P...
متن کاملPartial migration in roe deer: migratory and resident tactics are end points of a behavioural gradient determined by ecological factors
F. Cagnacci ([email protected]), M. Neteler, L. Delucchi and F. Ossi, Biodiversity and Molecular Ecology Dept, IASMA Research and Innovation Centre, Fondazione Edmund Mach, Via Mach 1, IT-38010 San Michele all ’ Adige (TN), Italy. FO also at: UMR CNRS 5558 Dept. of Biometry and Evolutionary Biology, Univ. Claude Bernard Lyon1, Bat G. Mendel 43 Bd du 11 Novembre 1918, FR-69622 Villeurb...
متن کاملFixed and Flexible: Coexistence of Obligate and Facultative Migratory Strategies in a Freshwater Fish
Migration is an important event in many animal life histories, but the degree to which individual animals participate in seasonal migrations often varies within populations. The powerful ecological and evolutionary consequences of such partial migration are now well documented, but the underlying mechanisms are still heavily debated. One potential mechanism of partial migration is between-indiv...
متن کاملMigratory common blackbirds have lower innate immune function during autumn migration than resident conspecifics.
Animals need a well-functioning immune system to protect themselves against pathogens. The immune system, however, is costly and resource trade-offs with other demands exist. For migratory animals several (not mutually exclusive) hypotheses exist. First, migrants reduce immune function to be able to allocate resources to migration. Second, migrants boost immune function to cope with more and/or...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Biology Letters
سال: 2015
ISSN: 1744-9561,1744-957X
DOI: 10.1098/rsbl.2014.0850