Opportunistic exploitation: an overlooked pathway to extinction.
Trends Ecol Evol. 2013 Apr 4;
Authors: Branch TA, Lobo AS, Purcell SW
How can species be exploited economically to extinction? Past single-species hypotheses examining the economic plausibility of exploiting rare species have argued that the escalating value of rarity allows extinction to be profitable. We describe an alternative pathway toward extinction in multispecies exploitation systems, termed ‘opportunistic exploitation’.
Riding the crimson tide: mobile terrestrial consumers track phenological variation in spawning of an anadromous fish.
Biol Lett. 2013;9(3):20130048
Authors: Schindler DE, Armstrong JB, Bentley KT, Jankowski K, Lisi PJ, Payne LX
When resources are spatially and temporally variable, consumers can increase their foraging success by moving to track ephemeral feeding opportunities as these shift across the landscape; the best examples derive from herbivore-plant systems, where grazers migrate to capitalize on the seasonal waves of vegetation growth.
Production is a poor metric for identifying regime-like behavior in marine stocks.
Proc Natl Acad Sci U S A. 2013 Mar 27;
Authors: Szuwalski C
PMID: 23536306 [PubMed – as supplied by publisher]
via pubmed: school of aquatic an… http://www.ncbi.nlm.nih.gov/pubmed/23536306?dopt=Abstract
MN Dethier, *EA Sosik, *AWE Galloway, DO Duggins, *CA Simenstad. 2013. Feature Article, open access. Marine Ecology Progress Series 478:1-14.
*Authors from SAFS
Research on food webs increasingly relies on sampling biomarkers (stable isotopes and fatty acids) in consumers and their potential prey. In studies of macroalgal and seagrass biomarkers in the northeast Pacific, Dethier and coworkers found substantial variation in biomarkers across dates and sites.
Branch TA, Hively DJ, Hilborn R (2013) Is the ocean food provision index biased? Nature 495:E5-E6
How close to maximum sustainable food provision is current seafood harvest from the world’s oceans? Halpern et al.  suggest that the answer is 25% from a global index of food provision, part of their multifaceted index of ocean health. Rigorous methods used for management, however, demonstrate that their food provision index is uncorrelated with actual food provision, and that global ocean food provision is in the range of 71–95%.
Temporal variation in selection on body length and date of return in a wild population of coho salmon, Oncorhynchus kisutch.
BMC Evol Biol. 2012;12:116
Authors: Kodama M, Hard JJ, Naish KA
BACKGROUND: A number of studies have measured selection in nature to understand how populations adapt to their environment; however, the temporal dynamics of selection are rarely investigated.
Phenotype flexibility in wild fish: Dolly Varden regulate assimilative capacity to capitalize on annual pulsed subsidies.
J Anim Ecol. 2013 Mar 19;
Authors: Armstrong JB, Bond MH
Large digestive organs increase rates of energy gain when food is plentiful but are costly to maintain and increase rates of energy loss when food is scarce. The physiological adaptations to this trade-off differ depending on the scale and predictability of variation in food abundance.
How Stock of Origin Affects Performance of Individuals across a Meta-Ecosystem: An Example from Sockeye Salmon.
PLoS One. 2013;8(3):e58584
Authors: Griffiths JR, Schindler DE, Seeb LW
Connectivity among diverse habitats can buffer populations from adverse environmental conditions, influence the functioning of meta-ecosystems, and ultimately affect the reliability of ecosystem services. This stabilizing effect on populations is proposed to derive from complementarity in growth and survival conditions experienced by individuals in the different habitats that comprise meta-ecosystems.
N. W. Kendall and T. P. Quinn,
Oikos 122: 411–420, 2013
Selective exploitation can cause adverse ecological and evolutionary changes in wild populations and also affect sex ratios but few studies have empirically documented skewed sex ratios in exploited fishes (other than species with extreme sexual size dimorphism, SSD). To investigate the possibility of sex-selective fishing on Alaskan sockeye salmon Oncorhynchus nerka, we assessed sex ratios in fish at two spatial scales: within each of five fishing districts and among 13 breeding populations in one of these districts.
Reproductive success of captively bred and naturally spawned Chinook salmon colonizing newly accessible habitat.
Evol Appl. 2013 Feb;6(2):165-79
Authors: Anderson JH, Faulds PL, Atlas WI, Quinn TP
Captively reared animals can provide an immediate demographic boost in reintroduction programs, but may also reduce the fitness of colonizing populations. Construction of a fish passage facility at Landsburg Diversion Dam on the Cedar River, WA, USA, provided a unique opportunity to explore this trade-off.