Variation in size frequency distribution of coral populations under different fishing pressures in two contrasting locations in the Indian Ocean

Hdl Handle:
http://hdl.handle.net/10545/621873
Title:
Variation in size frequency distribution of coral populations under different fishing pressures in two contrasting locations in the Indian Ocean
Authors:
Grimsditch, Gabriel; Pisapia, Chiara; Huck, Maren ( 0000-0002-7740-3903 ) ; Karisa, Juliet; Obura, David; Sweet, Michael J. ( 0000-0003-4983-8333 )
Abstract:
This study aimed to assess how the size-frequency distributions of coral genera varied between reefs under different fishing pressures in two contrasting Indian Ocean locations (the Maldives and East Africa). Using generalized linear mixed models, we were able to demonstrate that complex interactions occurred between coral genera, coral size class and fishing pressure. In both locations, we found Acropora coral species to be more abundant in non-fished compared to fished sites (a pattern which was consistent for nearly all the assessed size classes). Coral genera classified as ‘stress tolerant’ showed a contrasting pattern i.e. were higher in abundance in fished compared to non-fished sites. Site specific variations were also observed. For example, Maldivian reefs exhibited a significantly higher abundance in all size classes of ‘competitive’ corals compared to East Africa. This possibly indicates that East African reefs have already been subjected to higher levels of stress and are therefore less suitable environments for ‘competitive’ corals. This study also highlights the potential structure and composition of reefs under future degradation scenarios, for example with a loss of Acropora corals and an increase in dominance of ‘stress tolerant’ and ‘generalist’ coral genera.
Affiliation:
International Union for the Conservation of Nature; James Cook University; University of Derby; Kenya Marine and Fisheries Research Institute; Coastal Oceans Research and Development - Indian Ocean
Citation:
Grimsditch, G. et al (2017) 'Variation in size frequency distribution of coral populations under different fishing pressures in two contrasting locations in the Indian Ocean', Marine Environmental Research, DOI: 10.1016/j.marenvres.2017.09.017
Publisher:
Elsevier
Journal:
Marine Environmental Research
Issue Date:
23-Sep-2017
URI:
http://hdl.handle.net/10545/621873
DOI:
10.1016/j.marenvres.2017.09.017
Additional Links:
http://linkinghub.elsevier.com/retrieve/pii/S0141113616302628
Type:
Article
Language:
en
ISSN:
01411136
Sponsors:
USAid
Appears in Collections:
Environmental Sustainability Research Centre

Full metadata record

DC FieldValue Language
dc.contributor.authorGrimsditch, Gabrielen
dc.contributor.authorPisapia, Chiaraen
dc.contributor.authorHuck, Marenen
dc.contributor.authorKarisa, Julieten
dc.contributor.authorObura, Daviden
dc.contributor.authorSweet, Michael J.en
dc.date.accessioned2017-10-02T09:11:39Z-
dc.date.available2017-10-02T09:11:39Z-
dc.date.issued2017-09-23-
dc.identifier.citationGrimsditch, G. et al (2017) 'Variation in size frequency distribution of coral populations under different fishing pressures in two contrasting locations in the Indian Ocean', Marine Environmental Research, DOI: 10.1016/j.marenvres.2017.09.017en
dc.identifier.issn01411136-
dc.identifier.doi10.1016/j.marenvres.2017.09.017-
dc.identifier.urihttp://hdl.handle.net/10545/621873-
dc.description.abstractThis study aimed to assess how the size-frequency distributions of coral genera varied between reefs under different fishing pressures in two contrasting Indian Ocean locations (the Maldives and East Africa). Using generalized linear mixed models, we were able to demonstrate that complex interactions occurred between coral genera, coral size class and fishing pressure. In both locations, we found Acropora coral species to be more abundant in non-fished compared to fished sites (a pattern which was consistent for nearly all the assessed size classes). Coral genera classified as ‘stress tolerant’ showed a contrasting pattern i.e. were higher in abundance in fished compared to non-fished sites. Site specific variations were also observed. For example, Maldivian reefs exhibited a significantly higher abundance in all size classes of ‘competitive’ corals compared to East Africa. This possibly indicates that East African reefs have already been subjected to higher levels of stress and are therefore less suitable environments for ‘competitive’ corals. This study also highlights the potential structure and composition of reefs under future degradation scenarios, for example with a loss of Acropora corals and an increase in dominance of ‘stress tolerant’ and ‘generalist’ coral genera.en
dc.description.sponsorshipUSAiden
dc.language.isoenen
dc.publisherElsevieren
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S0141113616302628en
dc.rightsArchived with thanks to Marine Environmental Researchen
dc.subjectCoral reefen
dc.subjectFisheriesen
dc.subjectEcosystem managementen
dc.subjectCoastal watersen
dc.subjectPopulationen
dc.titleVariation in size frequency distribution of coral populations under different fishing pressures in two contrasting locations in the Indian Oceanen
dc.typeArticleen
dc.contributor.departmentInternational Union for the Conservation of Natureen
dc.contributor.departmentJames Cook Universityen
dc.contributor.departmentUniversity of Derbyen
dc.contributor.departmentKenya Marine and Fisheries Research Instituteen
dc.contributor.departmentCoastal Oceans Research and Development - Indian Oceanen
dc.identifier.journalMarine Environmental Researchen
All Items in UDORA are protected by copyright, with all rights reserved, unless otherwise indicated.