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Title: | Maldives pole-and-line tuna fishery : livebait fishery review 2015 |
Authors: | Jauharee, A. Riyaz Neal, Ken Miller, Kelsey I. އޭ. ރިޔާޒް ޖައުހަރީ ކެން ނީލް ކެލްސީ އައި. މިލަރ |
Keywords: | Fishing Tuna Live Bait Bait Fishing Maldives Silver sprat Blue sprat Anchovy Fusilier Chromis Big eye scad Dolphin Whale shark Rays Black coral Turtles Coral Reef Pole-and-Line fishery މަސްވެރިކަން މަސްބޭނުން ކަންނެލި ދިރޭ އެން ދިވެހިރާއްޖެ ރެހި ހޮނޑެލި މިޔަރެން މުގުރާން ނިލަމެހި މުށިމަސް ކޯމަސް ފެހުރިހި މަޑި އެންދެރި ކަހަނބު ވެލާ ފަރު ދޮށީގެ މަސްވެރިކަން |
Issue Date: | 2015 |
Publisher: | Marine Research Section, Ministry of Fisheries and Agriculture މެރިން ރިސާރޗް ސެންޓަރ، މިނިސްޓްރީ އޮފް ފިޝަރީސް އެންޑް އެގްރިކަލްޗަރ |
Citation: | Jauharee, A. R., Neal, K. and Miller, K. I. (2015). Maldives pole-and-line tuna fishery : livebait fishery review 2015. Male': Marine Research Centre, Ministry of Fisheries and Agriculture. ޖައުހަރީ, އ. ރ.، ނީލް، ކޭ.، އަދި މިލަރ، ކޭ. އައި. (2015). މޯލްޑިވްސް ޕޯލް އެންޑް ލައިން ޓޫނާ ފިޝަރީ : ލައިވްބެއިޓް ފިޝަރީ ރިވިއު 2015. މާލެ: މެރިން ރިސާރޗް ސެންޓަރ، މިނިސްޓްރީ އޮފް ފިޝަރީސް އެންޑް އެގްރިކަލްޗަރ. |
Abstract: | Fishing for tuna is an important industry in the Maldives, providing employment for
thousands of people and contributing up to 1.3% of GDP (NBS 2014). The pole-and-line
fishery for tuna targets skipjack Katsuwonus pelamis , yellowfin Thunnus albacares and big
eye Thunnus obesus .
The pole-and-line fishery depends on livebait: small shoaling fish that are thrown alive into
the water behind the fishing vessel to elicit a feeding response in the tuna and encourage
them to attack the lures on line at the end of the poles whereupon they are flicked into the
fishing vessel. These small fish are collected with rectangular lift nets, often using lights at
night to lure them to the water’s surface, within atolls prior to each fishing trip in the open
ocean and are kept alive on the fishing vessel in tanks in the vessels’ hold.
The pole-and-line tuna fishery was accredited by the Marine Stewardship Council as being
sustainable in 2012 but with eight conditions, one of which concerned the quantity of livebait
being harvested and another with the interaction of endangered, threatened and protected
species (ETP) with the livebait fishery.
Since 2010, logbook data has been collected throughout the Maldives on the quantity and
type of bait being collected by pole-and-line fishers as well as any interactions with ETP
species. Initially, low numbers of logbook records were returned and therefore only data
from 2011 onwards was included in the analysis.
Logbook returns peaked in 2013 at over ten thousand records but not all of these could be
used due to missing pieces of information. Nevertheless, once the data had been filtered for
full records, many thousands of data points were used in the analysis.
Silver sprat Spratelloides gracilis was the most important bait species throughout the
Maldives with varying contributions to livebait catches from blue sprat Spratelloides
delicatulus, anchovy Encrasicholina heteroloba, cardinalfish Apogonidae, fusiliers Caesionidae
and species of Chromis.
7
Analysis of catches showed great variability in quantities of livebait between region, year and
month. Statistical comparison of catches between years was impaired in many cases by lack
of data, but many species showed either no significant difference in catches between years
or a decrease from 2011 to 2014, depending on region. Importantly, any differences
between years were not consistent by species or region and therefore changes in catches
may be related to local depletion or inter-annual variability in abundance of these short-lived
species rather than population-level effects of the bait fishery.
Logbook data on interactions of the collection of bait fish with ETP species was lacking and
therefore appraisal was made using that collected by independent observers of bait fishing
operations. All indications are that ETP species are not harmed in any way by bait fishing and
occasional entanglement or entrapment in the gear usually results in the organism in
question being released without injury. Sharks and stingrays are an exception (not ETP
species globally but do benefit from protection in the Maldivian waters) which occasionally
suffer injury when being extracted from the nets used for collecting bait. |
URI: | http://saruna.mnu.edu.mv/jspui/handle/123456789/4608 |
Appears in Collections: | މަސްވެރިކަން Fisheries
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