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Morphometric analysis of the genus <i>Terschellingia</i> De Man, 1888 (Nematoda, Linhomoeidae) with discussion of the diagnostic features and identification key to the species

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  • Biology
  • Ecology

Abstract

Microsoft Word - orales y Posters-1[1].doc cage. The present study focuses no t o n ly on structura l d ive rs ity (species num ber), bu t a lso on fun c tiona l d ive rs ity (species iden tity ) and its im po rtance fo r ecosystem func tion ing o f a m u ddy bo ttom . THE IMPACTS OF THE DEMERSAL HAKE TRAW L FISHERY O N BENTHIC BIODIVERSITY IN SOUTHERN AFR IC A A tk inson . La ra : F ie ld, John, U n ivers ity o f C ape Tow n, South A fr ica The South A fr ic a n com m erc ia l tra w l fishe ry o r ig in a te d in the e a r ly 1 90 0s and ta rge ts the h ig h ly sought-a fte r g a d o id hake species M erlucc ius capensis and M . p a ra d o xu s in a n e a r con tinuous ba nd be tw een 3 0 0 an d 8 0 0 m depth from the w est to the south-east coasts o f South A fr ic a . The tra n sb o u n d a ry na tu re o f the hake stocks be tw een South A fr ic a and N a m ib ia , w h e re an e q u a lly la rg e hake fishe ry exists, has encou ra ged jo in t research and m anagem ent c o o p e ra tio n be tw een the tw o countries, fo r the dem ersa l tra w l fishe ry. The hake fishe ry is the la rgest and most luc ra tive o f South A fr ic a 's fisheries an d w as a w a rd e d the e n v ironm en ta lly susta inab le M a rin e S tew ardsh ip C ouncil ce rtifica tio n in 2 0 0 4 . The im pact o f tra w lin g on the benth ic env ironm ent has h o w e ve r been iden tified as a m a jo r risk to the sus ta inab ility o f th is fishe ry . The fishe ry is cu rre n tly un d e r re v ie w fo r re­ ce rtifica tion o f th is a w a rd a n d requ ires investiga tion o f p o ten tia l benth ic im pacts. E lsewhere studies have shown th a t dem ersa l fish ing g e a r can im pa c t s ig n ifica n tly on benth ic b io d ive rs ity , ho w e ve r, such effects have ne ve r been exam ined in southern A fr ic a . The a im o f th is s tudy is to q u a n tify the im pacts o f the dem ersa l tra w l fishe ry on ab unda nc

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