. La parte orientale del Mare di Bering ripiano : oceanografia e risorse / a cura di Donald W. cofano e John A. Calder . Figura 30-3. Il numero di stazioni in cui ichthyoplank- ton campioni sono stati raccolti in estate, giugno-agosto. 1 campioni ICHTHYOPLANKTON WK^T- 5 ? 1 1 1 11 6 H Uecember-February UTt-Lh-i 1" ^ ^^^^B* tâ. KTTrn^ - - -1 +44-1^ 11 ^^^^^^^^^^^^^^^HmLj rttTT" ^ k* Xh-h^I^^^ - ^^^^^^^^^H ' ^ 1 ,>1^^^^^W^Â" 1 -1 4-t{^^HiiiiiMI-' "f^tjjiJif!^^ ^' â ^^, i T-4-sriT-I^^ ^ ^ 1*-L^r^^^^B^H^ 7 |i|i â *, ' -T wrnj^^^^^Rr 5 31 2 U -44-HTmprmBrl ^ .'^1 1 ' 44-FHAxi+-^Klll' ^X

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. The Eastern Bering Sea Shelf : oceanography and resources / edited by Donald W. Hood and John A. Calder . Figure 30-3. Number of stations at which ichthyoplank- ton samples have been collected in summer, June-August. 1 ICHTHYOPLANKTON SAMPLES WK^T- 5 ? 1 1 1 11 6 H Uecember-February UTt~-L~h-i 1 ^" ^^^^B* tâ. KTTrn^ - - -1 +44-1^ 11 ^^^^^^^^^^^^^^^HmLj rttTT" ^ k* Xh-h^I^^^ ^ -^^^^^^^^H ' ^ 1 , >1^^^^^W^» 1 -1 4-t{^^HiiiiiMI-' ~'f~~~^tjji~Ji~f!^^ ~^' â ^^, i T~-4-sr~iT-~i^^ ~^ ^ 1*-L^r^^^^B^H^ 7 |i|i â *, ' -T wrnj^^^^^Rr 5 31 2 U -44-HTmprmBrl ^ .'^1 1 ' 44-FHAxi+-^Klll ~'~ ^XlXV^^^r^^WtjM Clu^~T~~f^^ â 'I 4-4-H=rEyyBrXrM V zCPrV-rxMP^Llr ... _ . -444-HiaFrXPr 1 ^â - u^V. .^ j- J lEP; Viiifflfni^rS: I~Zj iT-~J-^3l~4^âr--l-~l~XLL_ ' â T^ 1 1 i-v4â;V2^*lt'^^7u4r-^ - " ^'l If^^l*^^ (^-"-^l^ 1 ~ __. , iâ[-Aâ--Wv^r, ----^^r'^J^ i~^Jr^^ â ' > y?^â1â --^â â i r^ tiJKMMiâTjI--i---rrL]ji- â " " ^âIljl4---T0- W~r~Hvâi_ rir^~t~-l~JIL i ~ ~" __. si-. ' i_Xâi--+âTâ1âT I-WtâT ^ -^ â ~^ ^- -V-H-ttXV-V^i; ^ ~jâ/âLI / j~^f^ H&Si â 1 zti ^^44djp^Vr^ =±=JâiTâtâ/- 1"--/ J-TTr~1 1 1 h -H 11 I L-4âV-T 1âV- Figure 30-5. Number of stations at which icthyoplank- ton samples have been collected in winter, December- February. dant fish in the Bering Sea, spawn mainly during spring and their larvae are relatively scarce in samples collected during late summer and fall. A further obstacle to inter-cruise comparisons is the difference in types of tow used in making the collections. Vertical net tows, which usually strain a relatively small volume of water, capture only small numbers of fish larvae, and the more uncommon taxa are seldom found in collections made by this method. A horizontal tow at the surfaceâa neuston tow for exampleâmay produce large numbers of eggs and larvae, but these may belong to only a few taxa whose larvae characteristically inhabit this zone. Greenlin

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• bookcentury1900
• bookcollectionamericana
• bookleafnumber497
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