A meta-analysis of vertical stratification in demersal trawl gears

R. J. Fryer, K. Summerbell, F. G. O'Neill

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

A meta-analysis is presented of fishing trials that use trawl gear with horizontal separator panels to direct fish into an upper or lower codend. The analysis is applied to eight North Atlantic species: the gadoids cod (Gadus morhua), haddock (Melanogrammus aeglefinus), saithe (Pollachius virens), and whiting (Merlangius merlangus), the flatfish lemon sole (Microstomus kitt) and plaice (Pleuronectes platessa), and monkfish (Lophius piscatorius) and Nephrops (Nephops norvegicus). The proportion of fish that rise above the separator panel decreases as the height of the leading edge of the panel increases for six of the eight species. Only monkfish and Nephrops have no significant dependency on panel height. Cod is the only species for which separation depends on the horizontal distance of the leading edge of the panel from the ground gear, with the proportion of cod going above the panel increasing the farther the panel is from the ground gear. The time of day only affects the separation of plaice, with a greater proportion going above the panel at night than during the day.
Original languageEnglish
JournalCanadian Journal of Fisheries and Aquatic Sciences
Volume74
Issue number8
Pages (from-to)1243-1250
ISSN0706-652X
DOIs
Publication statusPublished - 2017
Externally publishedYes

Keywords

  • FLATFISH HERDING BEHAVIOR
  • TOWED FISHING GEARS
  • BOTTOM-TRAWL
  • CODEND SELECTIVITY
  • SPECIES SELECTIVITY
  • BYCATCH REDUCTION
  • ARTIFICIAL-LIGHT
  • TWINE THICKNESS
  • CATCH RATES
  • NORTH-SEA
  • Science & Technology
  • Life Sciences & Biomedicine
  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science
  • demersal fish
  • equipment
  • fishing gear
  • flatfish
  • gadoid
  • lobster
  • meta-analysis
  • stratification
  • Atlantic Ocean
  • Atlantic Ocean (North)
  • Gadiformes
  • Gadus morhua
  • Lophius piscatorius
  • Melanogrammus
  • Melanogrammus aeglefinus
  • Merlangius merlangus
  • Microstomus kitt
  • Nephrops
  • Pleuronectes
  • Pleuronectes platessa
  • Pleuronectiformes
  • Pollachius virens
  • Mathematical biology and statistical methods
  • Ecology: environmental biology - Animal
  • Ecology: environmental biology - Limnology
  • Animals, Chordates, Fish, Nonhuman Vertebrates, Vertebrates
  • vertical stratification

Cite this

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title = "A meta-analysis of vertical stratification in demersal trawl gears",
abstract = "A meta-analysis is presented of fishing trials that use trawl gear with horizontal separator panels to direct fish into an upper or lower codend. The analysis is applied to eight North Atlantic species: the gadoids cod (Gadus morhua), haddock (Melanogrammus aeglefinus), saithe (Pollachius virens), and whiting (Merlangius merlangus), the flatfish lemon sole (Microstomus kitt) and plaice (Pleuronectes platessa), and monkfish (Lophius piscatorius) and Nephrops (Nephops norvegicus). The proportion of fish that rise above the separator panel decreases as the height of the leading edge of the panel increases for six of the eight species. Only monkfish and Nephrops have no significant dependency on panel height. Cod is the only species for which separation depends on the horizontal distance of the leading edge of the panel from the ground gear, with the proportion of cod going above the panel increasing the farther the panel is from the ground gear. The time of day only affects the separation of plaice, with a greater proportion going above the panel at night than during the day.",
keywords = "FLATFISH HERDING BEHAVIOR, TOWED FISHING GEARS, BOTTOM-TRAWL, CODEND SELECTIVITY, SPECIES SELECTIVITY, BYCATCH REDUCTION, ARTIFICIAL-LIGHT, TWINE THICKNESS, CATCH RATES, NORTH-SEA, Science & Technology, Life Sciences & Biomedicine, Ecology, Evolution, Behavior and Systematics, Aquatic Science, demersal fish, equipment, fishing gear, flatfish, gadoid, lobster, meta-analysis, stratification, Atlantic Ocean, Atlantic Ocean (North), Gadiformes, Gadus morhua, Lophius piscatorius, Melanogrammus, Melanogrammus aeglefinus, Merlangius merlangus, Microstomus kitt, Nephrops, Pleuronectes, Pleuronectes platessa, Pleuronectiformes, Pollachius virens, Mathematical biology and statistical methods, Ecology: environmental biology - Animal, Ecology: environmental biology - Limnology, Animals, Chordates, Fish, Nonhuman Vertebrates, Vertebrates, vertical stratification",
author = "Fryer, {R. J.} and K. Summerbell and O'Neill, {F. G.}",
year = "2017",
doi = "10.1139/cjfas-2016-0391",
language = "English",
volume = "74",
pages = "1243--1250",
journal = "Canadian Journal of Fisheries and Aquatic Sciences",
issn = "0706-652X",
publisher = "N R C Research Press",
number = "8",

}

A meta-analysis of vertical stratification in demersal trawl gears. / Fryer, R. J.; Summerbell, K.; O'Neill, F. G.

In: Canadian Journal of Fisheries and Aquatic Sciences, Vol. 74, No. 8, 2017, p. 1243-1250.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - A meta-analysis of vertical stratification in demersal trawl gears

AU - Fryer, R. J.

AU - Summerbell, K.

AU - O'Neill, F. G.

PY - 2017

Y1 - 2017

N2 - A meta-analysis is presented of fishing trials that use trawl gear with horizontal separator panels to direct fish into an upper or lower codend. The analysis is applied to eight North Atlantic species: the gadoids cod (Gadus morhua), haddock (Melanogrammus aeglefinus), saithe (Pollachius virens), and whiting (Merlangius merlangus), the flatfish lemon sole (Microstomus kitt) and plaice (Pleuronectes platessa), and monkfish (Lophius piscatorius) and Nephrops (Nephops norvegicus). The proportion of fish that rise above the separator panel decreases as the height of the leading edge of the panel increases for six of the eight species. Only monkfish and Nephrops have no significant dependency on panel height. Cod is the only species for which separation depends on the horizontal distance of the leading edge of the panel from the ground gear, with the proportion of cod going above the panel increasing the farther the panel is from the ground gear. The time of day only affects the separation of plaice, with a greater proportion going above the panel at night than during the day.

AB - A meta-analysis is presented of fishing trials that use trawl gear with horizontal separator panels to direct fish into an upper or lower codend. The analysis is applied to eight North Atlantic species: the gadoids cod (Gadus morhua), haddock (Melanogrammus aeglefinus), saithe (Pollachius virens), and whiting (Merlangius merlangus), the flatfish lemon sole (Microstomus kitt) and plaice (Pleuronectes platessa), and monkfish (Lophius piscatorius) and Nephrops (Nephops norvegicus). The proportion of fish that rise above the separator panel decreases as the height of the leading edge of the panel increases for six of the eight species. Only monkfish and Nephrops have no significant dependency on panel height. Cod is the only species for which separation depends on the horizontal distance of the leading edge of the panel from the ground gear, with the proportion of cod going above the panel increasing the farther the panel is from the ground gear. The time of day only affects the separation of plaice, with a greater proportion going above the panel at night than during the day.

KW - FLATFISH HERDING BEHAVIOR

KW - TOWED FISHING GEARS

KW - BOTTOM-TRAWL

KW - CODEND SELECTIVITY

KW - SPECIES SELECTIVITY

KW - BYCATCH REDUCTION

KW - ARTIFICIAL-LIGHT

KW - TWINE THICKNESS

KW - CATCH RATES

KW - NORTH-SEA

KW - Science & Technology

KW - Life Sciences & Biomedicine

KW - Ecology, Evolution, Behavior and Systematics

KW - Aquatic Science

KW - demersal fish

KW - equipment

KW - fishing gear

KW - flatfish

KW - gadoid

KW - lobster

KW - meta-analysis

KW - stratification

KW - Atlantic Ocean

KW - Atlantic Ocean (North)

KW - Gadiformes

KW - Gadus morhua

KW - Lophius piscatorius

KW - Melanogrammus

KW - Melanogrammus aeglefinus

KW - Merlangius merlangus

KW - Microstomus kitt

KW - Nephrops

KW - Pleuronectes

KW - Pleuronectes platessa

KW - Pleuronectiformes

KW - Pollachius virens

KW - Mathematical biology and statistical methods

KW - Ecology: environmental biology - Animal

KW - Ecology: environmental biology - Limnology

KW - Animals, Chordates, Fish, Nonhuman Vertebrates, Vertebrates

KW - vertical stratification

U2 - 10.1139/cjfas-2016-0391

DO - 10.1139/cjfas-2016-0391

M3 - Journal article

VL - 74

SP - 1243

EP - 1250

JO - Canadian Journal of Fisheries and Aquatic Sciences

JF - Canadian Journal of Fisheries and Aquatic Sciences

SN - 0706-652X

IS - 8

ER -