Comparison in Biomass, Density and Age Composition of Ecklonia cava Populations in Two Localities with Different Temperature Conditions.
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Accession number;01A0448107
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| Title;Comparison in Biomass, Density and Age Composition of Ecklonia cava Populations in Two Localities with Different Temperature Conditions. |
| Author;
SERISAWA YUKIHIKO
(Tokyo Univ. of Fish.)
AKINO HIDEKI
(Hokkaido Hakodate Fishe. Exp. Stn.)
MATSUYAMA KAZUYO
(Tokaidai Kaiyoken Sentangise)
ONO MASAO
(Kochi Univ., Usa Mar. Biol. Inst.)
TANAKA JIRO
(Tokyo Univ. of Fish.)
YOKOHAMA YASUTSUGU
(Shizugawamachishizenkankyokatsuyose)
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Journal Title;Suisan Zoshoku
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Journal Code:Y0285A
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ISSN:0371-4217
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VOL.49;NO.1;PAGE.9-14(2001)
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| Figure&Table&Reference;FIG.6, TBL.1, REF.30 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;Ecklonia cava populations at Tei, Tosa Bay and Nabeta Bay, Shimoda, Izu Peninsula were compared seasonally from 1995 to 1997 by quadrate sampling. Water temperatures between the two sites differ by 2-4.DEG.C. on average, with Tei being the warmer site. The mean thallus wet weights at Tei ranged from 60.9 g (January) to 216.2 g (June) and from 329.4 g (January) to 720.5 g (October) in Nabeta Bay. The biomass was low in winter and high from spring to summer in both localities, ranging from 1.9-4.3 kg w.w./m'2' at Tei and 4.9-10.7 kg w.w./m'2' in Nabeta Bay. The biomass was lower at Tei than in Nabeta Bay at all times. The density at Tei ranged from 34-53 ind./m'2' (10-19 ind./m'2' in plants of 1 year old and over, 16-34 ind./m'2' in plants of 0 year old). At Nabeta Bay the density ranged from 15-40 ind./m'2' (12-17 ind./m'2' in plants of 1 year old and over, 3-26 ind./m'2' in plants of 0 year old). At Tei, the 0-1 y age group was dominant and the 2-3 y age group was rare throughout the year, whilst in Nabeta Bay, the 0 y age group was dominant from winter to spring, and the 5 y age group was recorded infrequently. (author abst.) |
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