Ontogenetic deepening of Northeast Atlantic fish stocks is not driven by fishing exploitation

Alan R. Baudron (Corresponding Author), Gretta Pecl, Caleb Gardner, Paul G. Fernandes, Asta Audzijonyte

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

For many marine fish species, the average size of individuals increases with depth. This phenomenon, first described a century ago, is known as ontogenetic deepening (1, 2). Several mechanisms have been proposed to explain it: optimal foraging; predation avoidance; and different optimal growth temperature for larger individuals, causing them to seek deeper and cooler waters to optimize growth and reproduction (3). In their recent paper in PNAS, Frank et al. (4) suggest an alternative explanation. They examined age-structured data from Atlantic cod (Gadus morhua) on the eastern Scotian Shelf, a stock that has experienced successive periods of intense, and absence of, fishing. In their study, fishing explained 72% of the variation in the observed age-related deepening, with the remaining variability attributed to ontogenetic deepening. They conclude that higher abundances of large fish in deeper waters is an artifact of greater fishing intensity at shallower depths and question whether ontogenetic deepening is a real ecological phenomenon.

Original languageEnglish
Pages (from-to)2390-2392
Number of pages3
JournalPNAS
Volume116
Issue number7
Early online date23 Jan 2019
DOIs
Publication statusPublished - 2019

Fingerprint

fishing
ecological phenomena
fish
artifact
deep water
predation
fish stock
temperature
water

Keywords

  • fish stocks
  • fishing
  • marine ecology
  • marine fish species
  • mixed effect models
  • ontogenetic deepening
  • Animals
  • Fisheries
  • Conservation of Natural Resources

ASJC Scopus subject areas

  • General

Cite this

Ontogenetic deepening of Northeast Atlantic fish stocks is not driven by fishing exploitation. / Baudron, Alan R. (Corresponding Author); Pecl, Gretta; Gardner, Caleb; Fernandes, Paul G.; Audzijonyte, Asta.

In: PNAS, Vol. 116, No. 7, 2019, p. 2390-2392.

Research output: Contribution to journalArticle

Baudron, Alan R. ; Pecl, Gretta ; Gardner, Caleb ; Fernandes, Paul G. ; Audzijonyte, Asta. / Ontogenetic deepening of Northeast Atlantic fish stocks is not driven by fishing exploitation. In: PNAS. 2019 ; Vol. 116, No. 7. pp. 2390-2392.
@article{610942b4290a4641b161b4cc530e54a9,
title = "Ontogenetic deepening of Northeast Atlantic fish stocks is not driven by fishing exploitation",
abstract = "For many marine fish species, the average size of individuals increases with depth. This phenomenon, first described a century ago, is known as ontogenetic deepening (1, 2). Several mechanisms have been proposed to explain it: optimal foraging; predation avoidance; and different optimal growth temperature for larger individuals, causing them to seek deeper and cooler waters to optimize growth and reproduction (3). In their recent paper in PNAS, Frank et al. (4) suggest an alternative explanation. They examined age-structured data from Atlantic cod (Gadus morhua) on the eastern Scotian Shelf, a stock that has experienced successive periods of intense, and absence of, fishing. In their study, fishing explained 72{\%} of the variation in the observed age-related deepening, with the remaining variability attributed to ontogenetic deepening. They conclude that higher abundances of large fish in deeper waters is an artifact of greater fishing intensity at shallower depths and question whether ontogenetic deepening is a real ecological phenomenon.",
keywords = "fish stocks, fishing, marine ecology, marine fish species, mixed effect models, ontogenetic deepening, Animals, Fisheries, Conservation of Natural Resources",
author = "Baudron, {Alan R.} and Gretta Pecl and Caleb Gardner and Fernandes, {Paul G.} and Asta Audzijonyte",
note = "The authors would like to acknowledge funding from the Horizon 2020 European research projects ClimeFish (grant No. 677039) (to ARB and PGF), an Australian Research Council Future Fellowship (to GP), and the Australian Research Council (grant number DP170104240) (to AA). Data deposition: The data reported in this paper were deposited at Figshare, https://doi.org/10.6084/m9.figshare.7189415.v1.",
year = "2019",
doi = "10.1073/pnas.1817295116",
language = "English",
volume = "116",
pages = "2390--2392",
journal = "PNAS",
issn = "0027-8424",
publisher = "NATL ACAD SCIENCES",
number = "7",

}

TY - JOUR

T1 - Ontogenetic deepening of Northeast Atlantic fish stocks is not driven by fishing exploitation

AU - Baudron, Alan R.

AU - Pecl, Gretta

AU - Gardner, Caleb

AU - Fernandes, Paul G.

AU - Audzijonyte, Asta

N1 - The authors would like to acknowledge funding from the Horizon 2020 European research projects ClimeFish (grant No. 677039) (to ARB and PGF), an Australian Research Council Future Fellowship (to GP), and the Australian Research Council (grant number DP170104240) (to AA). Data deposition: The data reported in this paper were deposited at Figshare, https://doi.org/10.6084/m9.figshare.7189415.v1.

PY - 2019

Y1 - 2019

N2 - For many marine fish species, the average size of individuals increases with depth. This phenomenon, first described a century ago, is known as ontogenetic deepening (1, 2). Several mechanisms have been proposed to explain it: optimal foraging; predation avoidance; and different optimal growth temperature for larger individuals, causing them to seek deeper and cooler waters to optimize growth and reproduction (3). In their recent paper in PNAS, Frank et al. (4) suggest an alternative explanation. They examined age-structured data from Atlantic cod (Gadus morhua) on the eastern Scotian Shelf, a stock that has experienced successive periods of intense, and absence of, fishing. In their study, fishing explained 72% of the variation in the observed age-related deepening, with the remaining variability attributed to ontogenetic deepening. They conclude that higher abundances of large fish in deeper waters is an artifact of greater fishing intensity at shallower depths and question whether ontogenetic deepening is a real ecological phenomenon.

AB - For many marine fish species, the average size of individuals increases with depth. This phenomenon, first described a century ago, is known as ontogenetic deepening (1, 2). Several mechanisms have been proposed to explain it: optimal foraging; predation avoidance; and different optimal growth temperature for larger individuals, causing them to seek deeper and cooler waters to optimize growth and reproduction (3). In their recent paper in PNAS, Frank et al. (4) suggest an alternative explanation. They examined age-structured data from Atlantic cod (Gadus morhua) on the eastern Scotian Shelf, a stock that has experienced successive periods of intense, and absence of, fishing. In their study, fishing explained 72% of the variation in the observed age-related deepening, with the remaining variability attributed to ontogenetic deepening. They conclude that higher abundances of large fish in deeper waters is an artifact of greater fishing intensity at shallower depths and question whether ontogenetic deepening is a real ecological phenomenon.

KW - fish stocks

KW - fishing

KW - marine ecology

KW - marine fish species

KW - mixed effect models

KW - ontogenetic deepening

KW - Animals

KW - Fisheries

KW - Conservation of Natural Resources

UR - http://www.scopus.com/inward/record.url?scp=85061407278&partnerID=8YFLogxK

UR - http://www.mendeley.com/research/ontogenetic-deepening-northeast-atlantic-fish-stocks-not-driven-fishing-exploitation

U2 - 10.1073/pnas.1817295116

DO - 10.1073/pnas.1817295116

M3 - Article

VL - 116

SP - 2390

EP - 2392

JO - PNAS

JF - PNAS

SN - 0027-8424

IS - 7

ER -