Phylogeography and Population Genetics

Kasapidis, Panagiotis

doi:10.1201/b16682-4

Cited by 8 publications

(14 citation statements)

References 68 publications

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“…The greater population structure of anchovy compared with sardine may be related to their greater affinity for coastal waters and (in some cases) rivers compared with sardine, which often occur farther offshore (Rykaczewski & Checkley 2008, Swartzman et al 2008. The offshore distribution of sardine, which have finer gill rakers, is consistent with plankton Barange et al 2009a, Carvalho & Castello 2013, Checkley et al 2009b, Dimmlich et al 2004, Flood et al 2014, Kasapidis 2014, Sanchez & Deciechomski 1995, Smith 2005, Zarraonaindia et al 2012 communities that are composed of relatively small individuals in offshore waters (Rykaczewski & Checkley 2008, Zarauz et al 2009). The larger size and longer migrations of sardine may also contribute to the lower genetic heterogeneity within its populations.…”

Section: Introductionsupporting

confidence: 60%

“…Sardine populations have varying degrees of stock structure within regions (Kasapidis 2014, Parrish et al 1989, Smith 2005. Among anchovy and sardine stocks, the Japanese sardine has the second-largest maximal biomass caught by fisheries (19.5 MT).…”

Section: Introductionmentioning

confidence: 99%

“…Finally, the third part addresses the future, including projected effects of climate change on anchovy and sardine, observations to date consistent with these projections, and recommended actions. Anchovy populations in all regions have multiple stocks (Kasapidis 2014, Zarraonaindia et al 2012. The world's largest single-species fishery, with a maximal biomass of 22.8 million tons (MT), is for Peruvian anchoveta ( Table 1).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Climate, Anchovy, and Sardine

Checkley

Asch

Rykaczewski

2017

Annu. Rev. Mar. Sci.

175

129

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Anchovy and sardine populated productive ocean regions over hundreds of thousands of years under a naturally varying climate, and are now subject to climate change of equal or greater magnitude occurring over decades to centuries. We hypothesize that anchovy and sardine populations are limited in size by the supply of nitrogen from outside their habitats originating from upwelling, mixing, and rivers. Projections of the responses of anchovy and sardine to climate change rely on a range of model types and consideration of the effects of climate on lower trophic levels, the effects of fishing on higher trophic levels, and the traits of these two types of fish. Distribution, phenology, nutrient supply, plankton composition and production, habitat compression, fishing, and acclimation and adaptation may be affected by ocean warming, acidification, deoxygenation, and altered hydrology. Observations of populations and evaluation of model skill are essential to resolve the effects of climate change on these fish.

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Section: Introductionsupporting

confidence: 60%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Climate, Anchovy, and Sardine

Checkley

Asch

Rykaczewski

2017

Annu. Rev. Mar. Sci.

175

129

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“…Genetic studies [ 43 ] provide no sign of reproductive isolation among sardine populations across European Atlantic waters. However, a pattern of isolation by distance, such that far apart populations are differentiated, is evident in various studies [ 44 ].…”

Section: Methodsmentioning

confidence: 99%

Testing spatial heterogeneity with stock assessment models

et al. 2018

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This paper describes a methodology that combines meta-population theory and stock assessment models to gain insights about spatial heterogeneity of the meta-population in an operational time frame. The methodology was tested with stochastic simulations for different degrees of connectivity between sub-populations and applied to two case studies, North Sea cod (Gadus morua) and Northeast Atlantic sardine (Sardina pilchardus). Considering that the biological components of a population can be partitioned into discrete spatial units, we extended this idea into a property of additivity of sub-population abundances. If the additivity results hold true for putative sub-populations, then assessment results based on sub-populations will provide information to develop and monitor the implementation of finer scale/local management. The simulation study confirmed that when sub-populations are independent and not too heterogeneous with regards to productivity, the sum of stock assessment model estimates of sub-populations’ SSB is similar to the SSB estimates of the meta-population. It also showed that a strong diffusion process can be detected and that the stronger the connection between SSB and recruitment, the better the diffusion process will be detected. On the other hand it showed that weak to moderate diffusion processes are not easy to identify and large differences between sub-populations productivities may be confounded with weak diffusion processes. The application to North Sea cod and Atlantic sardine exemplified how much insight can be gained. In both cases the results obtained were sufficiently robust to support the regional analysis.

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“…Several local studies have been carried out to unravel the genetic stocks of S. pilchardus (e.g., Tinti et al, 2002;Atarhouch et al, 2006;Deli et al, 2020), but only few works cover a greater extension of the sardine's range of distribution (e.g., Antoniou et al, in press; Fonseca et al, in press). In addition, few reviews have tried to compile the information available to provide a general overview of the existing populations (Kasapidis, 2014).…”

Section: Introductionmentioning

confidence: 99%

The current knowledge status of the genetic population structure of the European sardine (Sardina pilchardus): uncertainties to be solved for an appropriate fishery management

Caballero‐Huertas

Frigola‐Tepe

Coll

et al. 2022

Rev Fish Biol Fisheries

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To achieve sustainable fisheries implies that resources' management is carried out in accordance with biologically and ecologically relevant processes. In this context, to infer the boundaries of the genetic stocks along their distribution is crucial to avoid the depletion of genetic diversity induced by fishing pressure. Despite its remarkable ecological role and commercial interest, there are still many uncertainties about the genetic population structure and local adaptation processes of the European sardine (Sardina pilchardus) along its distributional range. Our analysis revealed that in addition to the uneven genetic study effort throughout its distribution, there are discrepancies when it comes to delimiting populations, especially in the waters surrounding the Iberian Peninsula. Also, powers of the genetic markers applied in the studies were examined, showing that allozymes detected a larger number of significant pairwise values of genetic differentiation, while mtDNA-RFLP detected a greater degree of differentiation among genetic stocks. Moreover, large values of genetic diversity in all the locations were identified regardless of marker type. Thereby, we provide a discussion of updated knowledge, contributing to shape long-term and genetically sustainable harvest strategies for this pelagic fish, since our findings indicate a mismatch between the genetic stocks and the managed stocks currently defined.

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Phylogeography and Population Genetics

Cited by 8 publications

References 68 publications

Climate, Anchovy, and Sardine

Climate, Anchovy, and Sardine

Testing spatial heterogeneity with stock assessment models

The current knowledge status of the genetic population structure of the European sardine (Sardina pilchardus): uncertainties to be solved for an appropriate fishery management

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