Robust estimates of a high N-e/N ratio in a top marine predator, southern bluefin tuna

Waples, Robin S.; Grewe, Peter M.; Bravington, Mark W.; Hillary, Richard; Feutry, Pierre

doi:10.1126/sciadv.aar7759

Advanced Search

Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

Advanced Search
Custom Query

All these words:

For very narrow results

This exact word or phrase:

When looking for a specific result

Any of these words:

Best used for discovery & interchangable words

None of these words:

Recommended to be used in conjunction with other fields

Language:

Dates

Publication Date Range:

to

Document Data

Title:

Document Type:

Library

Collection:

Series:

People

Author:

Clear All

Query Builder

Query box

Clear All

For additional assistance using the Custom Query please check out our Help Page

i

Robust estimates of a high N-e/N ratio in a top marine predator, southern bluefin tuna

2018
By Waples, Robin S. ; Grewe, Peter M. ; Bravington, Mark W. ; ...
Source: Science Advances 4(7), 2018

[PDF-494.47 KB]

Details You May Also Like

Details:

Journal Title:

Science Advances
Personal Author:

Waples, Robin S. ; Grewe, Peter M. ; Bravington, Mark W. ; Hillary, Richard ; Feutry, Pierre

Waples, Robin S. ; Grewe, Peter M. ; Bravington, Mark W. ; Hillary, Richard ; Feutry, Pierre Less -
NOAA Program & Office:

NMFS (National Marine Fisheries Service) ; NWFSC (Northwest Fisheries Science Center)

NMFS (National Marine Fisheries Service) ; NWFSC (Northwest Fisheries Science Center) Less -
Description:

Genetic studies of several marine species with high fecundity have produced "tiny" estimates (<101 of the ratio of effective population size (Ne) to adult census size (N), suggesting that even very large populations might be at genetic risk. A recent study using close-kin mark-recapture methods estimated adult abundance at N 2 x 106 for southern bluefin tuna (SBT), a highly fecund top predator that supports a lucrative (-$1 billion/year) fishery. We used the same genetic and life history data (almost 13,000 fish collected over 5 years) to generate genetic and demographic estimates of Ne per generation and Nb (effective number of breeders) per year and the NeIN ratio. Demographic estimates, which accounted for age-specific vital rates, skip breeding, variation in fecundity at age, and persistent individual differences in reproductive success, suggest that Ne/N is >0.1 and perhaps about 0.5. The genetic estimates supported this conclusion. Simulations using true Ne = 5 x 105 (Ne/N = 0.25) produced results statistically consistent with the empirical genetic estimates, whereas simulations using Ne = 2 x 104 (NeIN = 0.01) did not. Our results show that robust estimates of Ne and Ne/N can be obtained for large populations, provided sufficiently large numbers of individuals and genetic markers are used and temporal replication (here, 5 years of adult and juvenile samples) is sufficient to provide a distribution of estimates. The high estimated Ne/N ratio in SBT is encouraging and suggests that the species will not be compromised by a lack of genetic diversity in responding to environmental change and harvest.
Keywords:

[+]

Biology Bluefin Tuna Population Genetics
Source:

Science Advances 4(7), 2018
DOI:

https://doi.org/10.1126/sciadv.aar7759
Pubmed Central ID:

PMC6051734
Document Type:

Journal Article
Rights Information:

CC BY
Compliance:

PMC
Main Document Checksum:

[+]

urn:sha256:9208aa40641c7e1c534ab39d77624d846f70c8f2c22d63ff76b0f863187b10aa
Download URL:

https://staging-noaa.cdc.gov/view/noaa/24727/noaa_24727_DS1.pdf
File Type:

No Additional Files

More +

Robust estimates of a high N-e/N ratio in a top marine predator, southern bluefin tuna

Details:

Supporting Files

You May Also Like