ruise report of the Joint Chilean-German-ltalian Magellan "Victor Hensen" Campaign in 1994 edited by Wolf Arntz and Matthias Gorny with contributions of the participants Ber. Polarforsch. 190 (1 996) ISSN 0176 - 5027 Joint Chilean-German-Italian Magellan 99Victor Hensen" Campaign with participants from other European countries 17 October - 25 November 1994 Chief Scientist: Wolf Arntz Alfred - Wegener - Institut fü Polar und Meeresforschung Bremerhaven, Germany Chilean coordinator: Victor A. Gallardo Centro EULA, Univ. Concepci6n Concepci6n, Chile Italian coordinator: Riccardo Cattaneo ISAM, Univ. Genova Genova, Italy 1 Contents Page Map of the iternary of RV "Victor Hensen" .................................................4 Map of the cruise track during the Magellan Campaign ..........................5 Map of CTD stations ...........................................................................................6 Map of plankton sampling sites ......................................................................7 Map of benthos sampling sites ........................................................................8 Map of benthos sampling sites (shallow water) ...........................................9 Introduction (W. Arntz) .................................................................................10 Objectives of the Magellan Campaign .........................................................10 Summary Review ............................................................................................ 11 Itinerary of the cruise .......................................................................................13 Weather conditions .........................................................................................14 Acknowledgements .........................................................................................15 Reports of individual working groups ........................................................16 Hydrography ......................................................................................................16 Hydrography in Chilean fjords: Strait of Magellan to Beagle Channel (leg 1 and 2) (T. Antezana. M . Hamam6 .Y . Eissler. & S. Jara) ......................................16 Hydrography of the Beagle Channel (leg 4) (H. Klöser.......................................................................................................... 18 Physical oceanography of the Strait of Magellan in spring (D. Figuero & G. Yuraz) ...................................................................................20 Plankton .............................................................................................................23 Traits of Phyto- and Zooplankton from the Strait of Magellan to Beagle Channel on board "Victor Hensen" 2, leg 1 and 2, Oct - Nov 1994 (T. Antezana, M . Hamame, Y . Eissler & S. Jara) ........................................23 Growth of Calßnuaustralis during the spring season in the Magellan Strait from an onboard experiment (R. Escribano) .....................................................................................................32 Spatial distribution of mesozooplankton in the Beagle Channel, Southern Chile (C. Richter) .................................32 Preliminary results on the gelatinous zooplankton collected in the Magellan Strait (F. Paghs) ....................................................................34 Sediments, benthos and demersal fish ........................................................35 Sponge biology and sediment biochemistry (U. Witte) ...........................35 Epibenthic communities analysed by underwater camera (J. ~utt& T. Schickan) .....................................................................................35 Preliminary results of the multibox corer investigations (D. Gerdes) ..........................................................................................................41 Benthic macrofauna sampled with the Agassiz trawl l (W.E. ~rntz,M. Gorny, M. Lardies, E. Mutschke & C. Rios) ...................43 Early reproductive stages of Cheilostomatid bryozoans in the Strait of Magellan (H. Moyano) .........................................................51 Deep-water bivalves and gastropods ............................................................52 Ophisthobranchs (Gastropoda) collected by the RV "Victor Hensen" (M. Schrödl....................................................................................................... 52 First observations on the composition and occurrence of Peracarida (Crustacea, Malacostraca) in the Beagle Channel (A. Brandt) ..........................................................................................................54 Biodiversity and ecological roles of the amphipod crustaceans of the Antarctic and Magellan regions: a comparison (C. DeBroyer & M. Rauschert) ........................................................................55 Crustacea Decapoda: Summary report (W.E. Arntz, M. Gorny, I.S. Wehrtmann, M. Lardies & R. Soto) ...........57 Crustacea Decapoda: Report on the anomuran and brachyuran crabs (M. Gorny, W.E. Arntz & R. Soto) ................................60 Species composition and geographical distribution of caridean shrimps (Decapoda: Caridea) (I.S. Wehrtmann & M. Lardies) .....................................................................63 Echinodermata ..................................................................................................67 Ophiuroids (Echinodermata) of the Magellan region (C. Dahm) ...........................................................................................................67 Preliminary report On the demersal fish material collected during the "Victor Hensen" Magellan Campaign (G. Pequefio & J. Lamilla) ................................................................................68 Shallow-water benthos Distribution of macroalgae and invertebrate grazers in the Magellan Strait (L. Benedetti-Cecchi) ...............................................70 Analysis of macroalgal communities in the Magellan region, and a comparison with the Antarctic (H. Klöser...................................... 72 Benthic sampling to be used for studies On biometry. biomass and trophic relations (G. Albertelli) .............................................74 Plant-animal relationships in the intertidal and shallow subtidal benthic communities of the Magellan area (Chile) (M.C. Gambi. M.B. Scipione & G . Procaccini) .............................................75 Sponge ecology in the Strait of Magellan (M. Pansini & C . Cerrano) ...............................................................................76 Ecology of shallow-water bivalves (H.-J.Urban & B . Campos) ..............................................................................78 Palaeocommunities .........................................................................................80 Variations of palaeocommunities along gradients during the Quaternary (S.I. Di Geronimo & A . Rosso) ............................80 Evolutive stasis of a benthic community during the retraction of the Magellan Province: Analysis of an assemblage of organisms with hard skeletons from the Plio-Peistocene and Recent limits (C.Valdovinos) ..................82 Annexes .............................................................................................................25 Abbreviations ....................................................................................................85 Table 13: List of stations on board "Victor Hensen" .................................86 Table 14: List of shallow water stations in the Strait of Magellan .................................................................................92 Table 15: Agassiz trawl (AGT) results (Visual check) ..............................93 Table 16a: Agassiz trawl (AGT) results (Abundante in subsamples) ...........................................................................97 Table 16b: Agassiz trawl (AGT) results (Biomass in subsamples) ...............................................................................101 Table 17: Systematic list of fishes .................................................................105 Table 18: Scientific institutions involved .................................................107 Table 19: Lists of scientific participants. Legs 1-4 ......................................109 Table 20: Lists of ship's Crew. On arrival/during the campaign ............111 Table 21: Distribution of material ...............................................................112 Figure 1: Itinerary of RV "Victor Hensen" Bremerhaven - Punta Arenas 'Victor Hensen" Joint Magellan Campaign 1994 Locations of samvline Date 05 Esirecho. P. Ancho Sl. 20 1 06 Estrccho. P. Ancho SI. 19 @L 17 - 28 07 Esirecho. P. Ancho SL 18 08 Esirccho. P. Ancho St. 16 09 Eflrecho. P. Ancho SL 15 10 Esirecho. P. Hambrc St. 14 I t F-wecho. Bahfa Vocu 2 Eamcho, Roca-i Cm"&% 3 E'lircchn. Ra. Anwn 1 4 Estrccho, Ba. While Ocl. 29.30 I5 Esirccho. off Islas Cai.rc! l ... 16-cho.Ca~Noic~. .. .. LEG 21417 C. Magdalcna (Emrance) 18 C. Magdalcna 19 C, Magdalena. Pta Stock! 20 C. Magdalena, Baht8 Mom? 21 C. Cockhum (E),Isla Jane Nov. 2 - 3 (LEG 2) 22 C.Cockbum Nov. 22 - 23 (LEG 4) 23 C. Cockhum. Cakta Bmw 24 C. ßrccknockPia Mim21 1 25 C, Brccknwk (W). I, Aguim 26 C. Brecknock 27 C. ßrccknoc(E), I. Sydncy 28 C. Ballcncro. ofTFUTHa Baja 29 C. Ballcncro 30 C Ballcnero. Islas dcl Medio 3 1 C. Beagle. I. iimhal Chico