CESIMAR - CENPAT   25625
CENTRO PARA EL ESTUDIO DE SISTEMAS MARINOS
Unidad Ejecutora - UE
artículos
Título:
Assessing bottom-trawling impacts based on the longevity of benthic invertebrates
Autor/es:
JENNINGS, S.; CAMBIÈ, G.; HILBORN, R.; PARMA, A.M.; RIJNSDORP, A.D.; HIDDINK, J.G.; BOLAM, S.G.; MAZOR, T.; PITCHER, R.; SCIBERRAS, M.; KAISER, M.J.; MCCONNAUGHEY, R.A.; COLLIE, J.S.; SUURONEN, P.
Revista:
JOURNAL OF APPLIED ECOLOGY
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Lugar: Londres; Año: 2019 vol. 56 p. 1075 - 1084
ISSN:
0021-8901
Resumen:
1. Bottom trawling is the most widespread human activity directly affecting seabedhabitats. Assessment and effective management of the effects of bottom trawlingat the scale of fisheries requires an understanding of differences in sensitivity ofbiota to trawling. Responses to disturbance are expected to depend on the intrinsicrate of increase in populations (r), which is expected to be linearly related to thereciprocal of longevity.2. We examine the relationship between the longevity of benthic invertebrates andtheir response to bottom trawling; both in terms of the immediate mortality followinga trawl pass and their subsequent rates of recovery. We collate all availabledata from experimental and comparative trawling studies, and test how longevityinfluences these aspects of sensitivity.3. The shortest lived organisms (<1 year) increased in abundance shortly after experimentaltrawling but showed no response to trawling in long-term comparativestudies. Conversely, the abundance of biota with a life span >1 year decreased by~9% immediately following a trawl pass. The effect of bottom trawling in comparativestudies increased with longevity, with a 2?3× larger effect on biota living>10 years than on biota living 1?3 years. We attribute this difference to the slowerrecovery rates of the long-lived biota.4. The observed relationship between the intrinsic rate of population increase (r, ourmetric of recovery rate) and the reciprocal of longevity matches theoretical expectationand predicts that the sensitivity of habitats to bottom trawling is higherin habitats with higher proportions of long-lived organisms.