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Mark N. Maunder; Owen S. Hamel; Hui-Hua Lee; Kevin R. Piner; Jason M. Cope; André E. Punt; James N. Ianelli; Claudio Castillo-Jordán; Maia S. Kapur; Richard D. Methot
lifehistory, etc ; diagnostic techniques; fisheries; models; mortality; research; uncertainty; Show all 7 Subjects
Abstract:
... Natural mortality (M) is one of the most influential parameters in fisheries stock assessment and management. It relates directly to stock productivity and reference points used for fisheries management advice. Unfortunately, M is also very difficult to estimate, and hence very uncertain. Representing the uncertainty in M and how this influences estimates of management quantities is therefore an i ...
lifehistory, etc ; Ompok bimaculatus; aquaculture; catfish; food animals; habitat destruction; hatcheries; ontogeny; India; Show all 9 Subjects
Abstract:
... The butter catfish, Ompok bimaculatus, belonging to the silurid family, is widely regarded as an important food fish for aquaculture diversification in India. Furthermore, the species poses a threat due to habitat degradation and other anthropogenic factors, and has been categorised as “near threatened”, therefore, its culture promotion is warranted. To establish a successful breeding programme, a ...
lifehistory, etc ; Ischnura; bacterioplankton; community structure; energy; environment; heat; intestinal microorganisms; latitude; microbial communities; microbiome; Show all 11 Subjects
Abstract:
... The integration of life-history, physiological and behavioural traits into the pace-of-life generates a powerful framework to understand trait variation in nature both along environmental gradients and in response to environmental stressors. While the gut microbiome has been hypothesized as a candidate mechanism to underlie differentiation in the pace-of-life, this has been rarely studied. We inve ...
lifehistory, etc ; Trichiurus lepturus; aquaculture; estuaries; females; genetic variation; habitats; histology; males; sex ratio; temperature; winter; Australia; Show all 13 Subjects
Abstract:
... Knowledge of reproductive biology and life-history traits of populations exploited by fisheries is important for their sustainable management. We investigated the life-history traits of Trichiurus lepturus (largehead hairtail) in south-eastern Australia; a region of low exploitation for this otherwise heavily exploited circumglobal species, to investigate whether there were differences in the repr ...
lifehistory, etc ; Drosophila melanogaster; body fat; cold; cold tolerance; copulation; directed evolution; larval development; longevity; starvation; stress tolerance; trehalose; Show all 12 Subjects
Abstract:
... The physiological mechanisms underpinning adaptations to starvation and cold stresses have been extensively studied in Drosophila, yet the understanding of correlated changes in stress-related and life-history traits, as well as the energetics of stress tolerance, still remains elusive. To answer the questions empirically in this context, we allowed D. melanogaster to evolve for either increased s ...
... Understanding the spatial and temporal habitat use of a population is a necessary step for recovery planning. For Chinook salmon (Oncorhynchus tshawytscha), variation in their migration and habitat use complicate predicting how restoring habitats could impact total recruitment. To evaluate how juvenile life history variation affects a population’s response to potential restoration, we developed a ...
Enrique Pino Martinez; Pablo Balseiro; Sigurd O. Stefansson; Nobuto Kaneko; Birgitta Norberg; Mitchell S. Fleming; Albert K.D. Imsland; Sigurd O. Handeland
lifehistory, etc ; Salmo salar; adenosinetriphosphatase; aquaculture; early development; genes; gonadosomatic index; insulin-like growth factor I; males; parr; photoperiod; restricted feeding; risk; salmon; seawater; smoltification; temperature; Show all 17 Subjects
Abstract:
... Early maturation of Atlantic salmon male postsmolts is undesirable in aquaculture due to its negative impact on growth, welfare and seawater adaptation, however it is an increasing problem under intensive rearing conditions. The effect of temperature and feeding ration on sexual maturation during the induction of smoltification was tested with a 3 × 2 factorial design including three temperatures ...
lifehistory, etc ; biodiversity; reproductive performance; Show all 3 Subjects
Abstract:
... Accelerating rates of biodiversity loss underscore the need to understand how species achieve resilience—the ability to resist and recover from a/biotic disturbances. Yet, the factors determining the resilience of species remain poorly understood, due to disagreements on its definition and the lack of large‐scale analyses. Here, we investigate how the life history of 910 natural populations of ani ...
... Iteroparous species may reproduce at many different ages, resulting in a reproductive dispersion that affects the damping of population perturbations, and varies among life histories. Since generation time (Tc) is known to capture aspects of life‐history variation, such as life‐history speed, does Tc also determine reproductive dispersion (S) or damping time (τ)? Using phylogenetically corrected a ...
... The dear enemy hypothesis predicts that territorial individuals will be less aggressive toward known neighbors than to strangers. This hypothesis has been well studied and there is a wealth of data demonstrating its prevalence in some taxa. However, a quantitative synthesis is needed to test the generality of the phenomenon, identify key mechanisms driving the behavior, and guide future research. ...
... Equilibrium yields and biomasses in relation to fishing mortality were generated for a wide range of life‐history traits (LHTs), which included growth parameters, natural mortality, maturity, selectivity and steepness of the Beverton and Holt stock–recruitment relationship. For each combination of LHTs, the fishing mortality expected to produce maximum sustainable yield (Fₘₛy), its selected proxie ...
lifehistory, etc ; demography; evolution; genomics; longevity; Show all 5 Subjects
Abstract:
... The distribution of fitness effects (DFE) of new mutations plays a central role in molecular evolution. It is therefore crucial to be able to estimate it accurately from genomic data and to understand the factors that shape it. After a rapid overview of available methods to characterize the fitness effects of mutations, we review what is known on the factors affecting them in plants. Available dat ...
lifehistory, etc ; adulthood; adults; longevity; telomeres; Show all 5 Subjects
Abstract:
... Although early‐life adversity has been associated with negative consequences during adulthood, growing evidence shows that such adversity can also lead to subsequent stress resilience and positive fitness outcomes. Telomere dynamics are relevant in this context because of the link with developmental conditions and longevity. However, few studies have assessed whether the effects of early‐life adve ...
lifehistory, etc ; Carcharhinus; models; sharks; stakeholders; Show all 5 Subjects
Abstract:
... Coastal sharks are challenging to manage in the United States due to their slow life history, limited data availability, history of overexploitation, and competing stakeholder interests. Furthermore, species like the sandbar shark (Carcharhinus plumbeus) are subjected to international exploitation unmanaged by the US. We conducted a management strategy evaluation using Stock Synthesis on the sandb ...
... Demographic buffering and lability have been identified as adaptive strategies to optimise fitness in a fluctuating environment. These are not mutually exclusive, however, we lack efficient methods to measure their relative importance for a given life history. Here, we decompose the stochastic growth rate (fitness) into components arising from nonlinear responses and variance–covariance of demogra ...
lifehistory, etc ; Anura; acoustics; evolution; frogs; vocalization; Show all 6 Subjects
Abstract:
... Acoustic signals in animals serve to convey context-dependent information to receivers. Birds and mammals combine diverse sounds into complex sequences to communicate, but the role of temporal sequencing of signals remains understudied in other taxa. Anuran vocalizations are a prominent feature of their life history, and function in defence of territories and to attract mates. However, there are f ...
lifehistory, etc ; Oncorhynchus masou; females; phenotype; research; Show all 5 Subjects
Abstract:
... The present study investigated the validity of two male-specific molecular markers, OtY2 and sdY, in two wild populations of red-spotted masu salmon (Oncorhynchus masou ishikawae). All phenotypic males were positive for both markers in both populations. On the other hand, some phenotypic females were also positive in each population: 32% and 11% in OtY2 and 71% and 67% in sdY. Individuals with no ...
lifehistory, etc ; drought; habitats; plant competition; reproduction; Show all 5 Subjects
Abstract:
... According to the stress gradient hypothesis (SGH), ecological interactions between organisms shift positively as environmental stress increases. In the case of associational resistance, habitat is modified to ameliorate stress, benefitting other organisms. The SGH is contentious due to conflicting evidence and theoretical perspectives, so we adopted a meta‐analytic approach to determine if it is w ...
lifehistory, etc ; climate change; emotions; phenology; statistics; Show all 5 Subjects
Abstract:
... Proposed in 1849 by Charles Morren to depict periodical phenomena governed by seasons, the term ‘phenology' has spread in many fields of biology. With the wide adoption of the concept of phenology flourished a large number of metrics with different meaning and interpretation. Here, we first a priori classified 52 previously published metrics used to characterise the phenology of births in large he ...
lifehistory, etc ; biomass; fish; models; risk reduction; uncertainty; Show all 6 Subjects
Abstract:
... The precautionary approach to fisheries management advocates for risk‐averse management strategies that include biological reference points and account for scientific uncertainty (i.e. process, model and observation uncertainty). In this regard, two approaches have been recommended: (a) biomass reference points to safeguard against low stock biomass, and (b) uncertainty buffers that reduce the cat ...