Consulta: subjectFacets:"Fisheries-induced evolution"
Registros recuperados: 7
Data/hora: 11/06/2024 14:32:01

Determinism of Temporal Variability in Size at Maturation of Sardine Sardina pilchardus in the Bay of Biscay
Provedor de dados: 5
Autores: Véron, Matthieu; Duhamel, Erwan; Bertignac, Michel; Pawlowski, Lionel; Huret, Martin; Baulier, Loic.
Age and size at maturation appear as key parameters governing the dynamics of a population as they affect growth rate, fecundity, and survival. The expression of such life history traits is determined by genetic make-up and modulated by environmental factors mainly through phenotypic plasticity. Moreover, fishing, besides decreasing population size and changing demographic composition can alter allelic frequencies through fisheries-induced evolution by selecting for some particular traits. In the Bay of Biscay, a decreasing trend in both sardine body condition and size-at-age has recently been pointed out at the population level. The Probabilistic Maturation Reaction Norm (PMRN) approach was applied to help disentangle phenotypic plasticity and genetic...
Tipo: Text
Palavras-chave: Fisheries-induced evolution; Body condition; Phenotypic plasticity; Maturation; Growth; Sardina pilchardus; Bay of biscay.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00660/77203/78637.pdf

Robbing Peter to pay Paul: replacing unintended cross-taxa conflicts with intentional tradeoffs by moving from piecemeal to integrated fisheries bycatch management
Provedor de dados: 5
Autores: Gilman, Eric; Chaloupka, Milani; Dagorn, Laurent; Hall, Martin; Hobday, Alistair; Musyl, Michael; Pitcher, Tony; Poisson, Francois; Restrepo, Victor; Suuronen, Petri.
Bycatch in fisheries can have profound effects on the abundance of species with relatively low resilience to increased mortality, can alter the evolutionary characteristics and concomitant fitness of affected populations through heritable trait-based selective removals, and can alter ecosystem functions, structure and services through food web trophic links. We challenge current piecemeal bycatch management paradigms, which reduce the mortality of one taxon of conservation concern at the unintended expense of others. Bycatch mitigation measures may also reduce intraspecific genetic diversity. We drew examples of broadly prescribed ‘best practice’ methods to mitigate bycatch that result in unintended cross-taxa conflicts from pelagic longline, tuna purse...
Tipo: Text
Palavras-chave: Bycatch; Conflicts; Decision support tool; Fisheries-induced evolution; Holistic management; Integrated management.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00475/58693/61206.pdf

Evolutionary impact assessment: accounting for evolutionary consequences of fishing in an ecosystem approach to fisheries management
Provedor de dados: 5
Autores: Laugen, Ane; Engelhard, Georg; Whitlock, Rebecca; Arlinghaus, Robert; Dankel, Dorothy J.; Dunlop, Erin S.; Eikeset, Anne M.; Enberg, Katja; Jorgensen, Christian; Matsumura, Shuichi; Nussle, Sebastien; Urbach, Davnah; Baulier, Loic; Boukal, David S.; Ernande, Bruno; Johnston, Fiona D.; Mollet, Fabian; Pardoe, Heidi; Therkildsen, Nina O.; Uusi-heikkilae, Silva; Vainikka, Anssi; Heino, Mikko; Rijnsdorp, Adriaan D.; Dieckmann, Ulf.
Managing fisheries resources to maintain healthy ecosystems is one of the main goals of the ecosystem approach to fisheries (EAF). While a number of international treaties call for the implementation of EAF, there are still gaps in the underlying methodology. One aspect that has received substantial scientific attention recently is fisheries-induced evolution (FIE). Increasing evidence indicates that intensive fishing has the potential to exert strong directional selection on life-history traits, behaviour, physiology, and morphology of exploited fish. Of particular concern is that reversing evolutionary responses to fishing can be much more difficult than reversing demographic or phenotypically plastic responses. Furthermore, like climate change, multiple...
Tipo: Text
Palavras-chave: Ecosystem approach to fisheries; Ecosystem services; Fisheries yield; Fisheries-induced evolution; Impact assessment; Sustainable fisheries.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00124/23522/21409.pdf

Can fisheries-induced evolution shift reference points for fisheries management?
Provedor de dados: 5
Autores: Heino, Mikko; Baulier, Loic; Boukal, David S.; Ernande, Bruno; Johnston, Fiona D.; Mollet, Fabian M.; Pardoe, Heidi; Therkildsen, Nina O.; Uusi-heikkila, Silva; Vainikka, Anssi; Arlinghaus, Robert; Dankel, Dorothy J.; Dunlop, Erin S.; Eikeset, Anne Maria; Enberg, Katja; Engelhard, Georg; Jorgensen, Christian; Laugen, Ane; Matsumura, Shuichi; Nussle, Sebastien; Urbach, Davnah; Whitlock, Rebecca; Rijnsdorp, Adriaan D.; Dieckmann, Ulf.
Biological reference points are important tools for fisheries management. Reference points are not static, butmay change when a population's environment or the population itself changes. Fisheries-induced evolution is one mechanism that can alter population characteristics, leading to "shifting" reference points by modifying the underlying biological processes or by changing the perception of a fishery system. The former causes changes in "true" reference points, whereas the latter is caused by changes in the yardsticks used to quantify a system's status. Unaccounted shifts of either kind imply that reference points gradually lose their intended meaning. This can lead to increased precaution, which is safe, but potentially costly. Shifts can also occur in...
Tipo: Text
Palavras-chave: Biological reference points; Fisheries-induced evolution; Fisheries management; Population dynamics; Precautionary approach; Uncertainty.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00151/26228/24302.pdf

Reproductive investment in Atlantic cod populations off Newfoundland: Contrasting trends between males and females
Provedor de dados: 5
Autores: Baulier, Loic; Morgan, M. Joanne; Lilly, George R.; Dieckmann, Ulf; Heino, Mikko.
Life history theory predicts selection for higher reproductive investment in response to increased mortality among mature individuals. We tested this prediction over the period from 1978 to 2013 for three populations of Atlantic cod (Gadus morhua) off Newfoundland. These populations were heavily fished for a long period. We considered changes in standardized gonad weight as a proxy for changes in gonadal investment. We accounted for the allometry between gonad and body weight, individual body condition, water temperature, and potential spatial and density-dependent effects. Males display significant temporal trends in gonadal investment in all populations; in agreement with theoretical predictions, these trends show increased gonadal investments during the...
Tipo: Text
Palavras-chave: Reproductive investment; Fisheries-induced evolution; Atlantic cod; Gonad weight.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00400/51111/51893.pdf

Fisheries-induced neutral and adaptive evolution in exploited fish populations and consequences for their adaptive potential
Provedor de dados: 5
Autores: Marty, Lise; Dieckmann, Ulf; Ernande, Bruno.
Fishing may induce neutral and adaptive evolution affecting life-history traits, and molecular evidence has shown that neutral genetic diversity has declined in some exploited populations. Here we theoretically study the interplay between neutral and adaptive evolution caused by fishing. An individual-based eco-genetic model is devised that includes neutral and functional loci in a realistic ecological setting. In line with theoretical expectations, we find that fishing induces evolution towards slow growth, early maturation at small size, and higher reproductive investment. We show, first, that the choice of genetic model (based on either quantitative genetics or gametic inheritance) influences the evolutionary recovery of traits after fishing ceases....
Tipo: Text
Palavras-chave: Eco-genetic model; Effective population size; Fisheries-induced evolution; Genetic drift; Genetic erosion; Genetic markers; Life-history traits; Natural selection and contemporary evolution.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00228/33964/33473.pdf

Temporal trends in age and size at maturation of four North Sea gadid species: cod, haddock, whiting and Norway pout
Provedor de dados: 5
Autores: Marty, Lise; Rochet, Marie-joelle; Ernande, Bruno.
Younger ages and smaller sizes at maturation have been observed in commercial fish stocks over the last century. We establish that age and length at 50% proportion mature (i.e. the proportion of mature individuals in a population or the probability that an individual is mature) decreased from the 1970s to the 2000s in North Sea cod Gadus morhua, haddock Melanogrammus aeglefinus and whiting Merlangius merlangus, but not in Norway pout Trisopterus esmarkii. The potential contributions of demography, phenotypic plasticity and evolution to these trends were assessed. First, maturation trends were extricated from demographic effects and growth-dependent plasticity by estimating probabilistic maturation reaction norms (PMRNs). PMRN midpoints have significantly...
Tipo: Text
Palavras-chave: Probabilistic maturation reaction norm; Demography; Phenotypic plasticity; Fisheries-induced evolution; Life-history strategy; Maturity; Growth; Reproductive investment.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00180/29152/27559.pdf