Limits...
Combining genetic and demographic information to prioritize conservation efforts for anadromous alewife and blueback herring.

Palkovacs EP, Hasselman DJ, Argo EE, Gephard SR, Limburg KE, Post DM, Schultz TF, Willis TV - Evol Appl (2013)

Bottom Line: We identified three distinct stocks in alewife and four stocks in blueback herring.Analysis of available time series data for spawning adult abundance and body size indicate declines across the US ranges of both species, with the most severe declines having occurred for populations belonging to the Southern New England and the Mid-Atlantic Stocks.While all alewife and blueback herring populations deserve conservation attention, those belonging to these genetic stocks warrant the highest conservation prioritization.

View Article: PubMed Central - PubMed

Affiliation: Department of Ecology and Evolutionary Biology, University of California Santa Cruz, CA, USA.

ABSTRACT
A major challenge in conservation biology is the need to broadly prioritize conservation efforts when demographic data are limited. One method to address this challenge is to use population genetic data to define groups of populations linked by migration and then use demographic information from monitored populations to draw inferences about the status of unmonitored populations within those groups. We applied this method to anadromous alewife (Alosa pseudoharengus) and blueback herring (Alosa aestivalis), species for which long-term demographic data are limited. Recent decades have seen dramatic declines in these species, which are an important ecological component of coastal ecosystems and once represented an important fishery resource. Results show that most populations comprise genetically distinguishable units, which are nested geographically within genetically distinct clusters or stocks. We identified three distinct stocks in alewife and four stocks in blueback herring. Analysis of available time series data for spawning adult abundance and body size indicate declines across the US ranges of both species, with the most severe declines having occurred for populations belonging to the Southern New England and the Mid-Atlantic Stocks. While all alewife and blueback herring populations deserve conservation attention, those belonging to these genetic stocks warrant the highest conservation prioritization.

No MeSH data available.


Isolation by distance (IBD) relationships for alewife and blueback herring. Both species show significant IBD, with alewife displaying a steeper slope of the relationship, indicating less gene flow among alewife populations.
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fig04: Isolation by distance (IBD) relationships for alewife and blueback herring. Both species show significant IBD, with alewife displaying a steeper slope of the relationship, indicating less gene flow among alewife populations.

Mentions: Mantel tests revealed a highly significant (P < 0.001) pattern of IBD for both alewife (r = 0.73) and blueback herring (r = 0.71) across their US range. The slope of the IBD relationship was steeper in alewife (slope = 2.3 e-4) compared with blueback herring (slope = 8.9 e-5), suggesting greater genetic isolation among alewife populations or, conversely, more gene flow among blueback herring populations (Fig. 4).


Combining genetic and demographic information to prioritize conservation efforts for anadromous alewife and blueback herring.

Palkovacs EP, Hasselman DJ, Argo EE, Gephard SR, Limburg KE, Post DM, Schultz TF, Willis TV - Evol Appl (2013)

Isolation by distance (IBD) relationships for alewife and blueback herring. Both species show significant IBD, with alewife displaying a steeper slope of the relationship, indicating less gene flow among alewife populations.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3927884&req=5

fig04: Isolation by distance (IBD) relationships for alewife and blueback herring. Both species show significant IBD, with alewife displaying a steeper slope of the relationship, indicating less gene flow among alewife populations.
Mentions: Mantel tests revealed a highly significant (P < 0.001) pattern of IBD for both alewife (r = 0.73) and blueback herring (r = 0.71) across their US range. The slope of the IBD relationship was steeper in alewife (slope = 2.3 e-4) compared with blueback herring (slope = 8.9 e-5), suggesting greater genetic isolation among alewife populations or, conversely, more gene flow among blueback herring populations (Fig. 4).

Bottom Line: We identified three distinct stocks in alewife and four stocks in blueback herring.Analysis of available time series data for spawning adult abundance and body size indicate declines across the US ranges of both species, with the most severe declines having occurred for populations belonging to the Southern New England and the Mid-Atlantic Stocks.While all alewife and blueback herring populations deserve conservation attention, those belonging to these genetic stocks warrant the highest conservation prioritization.

View Article: PubMed Central - PubMed

Affiliation: Department of Ecology and Evolutionary Biology, University of California Santa Cruz, CA, USA.

ABSTRACT
A major challenge in conservation biology is the need to broadly prioritize conservation efforts when demographic data are limited. One method to address this challenge is to use population genetic data to define groups of populations linked by migration and then use demographic information from monitored populations to draw inferences about the status of unmonitored populations within those groups. We applied this method to anadromous alewife (Alosa pseudoharengus) and blueback herring (Alosa aestivalis), species for which long-term demographic data are limited. Recent decades have seen dramatic declines in these species, which are an important ecological component of coastal ecosystems and once represented an important fishery resource. Results show that most populations comprise genetically distinguishable units, which are nested geographically within genetically distinct clusters or stocks. We identified three distinct stocks in alewife and four stocks in blueback herring. Analysis of available time series data for spawning adult abundance and body size indicate declines across the US ranges of both species, with the most severe declines having occurred for populations belonging to the Southern New England and the Mid-Atlantic Stocks. While all alewife and blueback herring populations deserve conservation attention, those belonging to these genetic stocks warrant the highest conservation prioritization.

No MeSH data available.