Abstract
Macrobenthos were investigated at 77 stations on the level bottom of Maizuru Bay in the spring season in 1971. Among the animals collected in this survey, two animal groups,i.e. bivalves and polychaetes, predominated.Theora lubrica was the most predominant species, occupying 39 % of the total individuals collected. An apodan holothurian,Notomastus sp.,Prionospio ehlcrsi andLumbrineris longifolia also prevailed in number.
According to the similarity of the composition of eight species common in the present area, the sampling stations were classified into four categories. As the stations belonging to each category are distributed in a peculiar portion of the bay, the bay can be divided into four areas, A–D, which are characterized as follows: Area A,Theora lubrica is highly predominant; Area B, an apodan holothurian and six common polychaetes (Notomastus sp.,Lumbrineris longifolia, Paraprionospio pinnata, Glycera chirori, Tharyx sp. andPolycirrus sp.) are relatively abundant; Area C, intermediate between Areas A and B; Area D, the above-mentioned eight species are scanty. These regional divisions of the bay correspond well with those based on the physico-chemical conditions on the bottom. Benthic feature of each area of the bay was discussed in connection with the bottom environment.
Comparison of the present results with the previous data has revealed a considerable decrease of population density during the past 25 years in the area concerned.
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References
Horikoshi, M. (1962): Distribution of benthic organisms and their remains at the entrance of Tokyo Bay, in relation to submarine topography, sediments and hydrography. Natur. Sci. Rep. Ochanomizu Univ.,13(2), 47–122.
Imajima, M. andM. Higuchi (1975): Lumbrineridae of polychaetous annelids from Japan, with descriptions of six new species. Bull. Natn. Sci. Mus., Ser. A (Zoology),1(1), 5–37.
Kikuchi, T. (1964): Ecology and biological production of Lake Nakaumi and adjacent regions, III. Macrobenthic communities of Lake Shinji-ko and Lake Nakaumi. Spec. Publ. Seto Mar. Biol. Lab., Ser. II. Part I,1, 21–44.
Reish, D.J. (1959): A discussion of the importance of the screen size in washing quantitative marine bottom samples. Ecology,40(2), 307–309.
Woodin, S.A. (1974): Polychaete abundance pattern in a marine soft-sediment environment. The importance of biological interaction. Ecol. Monogr.,44(2), 171–187.
(1974): 38 pp.
(1946):55, 1–35.
(1952): pp. 59–64.
(1955):16–19, 400–410.
(1956):77, 1–31.
(1971):3–4, 31–38.
(1973): v+2i3pp., 49–63.
(1974): 47–51.
(1976):Theora lata (Hinds)17(1–2), 261–271.
(1963):21, 1–90.
(1966): 30–55.
(1966): 20–29.
(1960):36 (4), 111–117.
(1973):11(2), 70–82.
(1938):7, 176–178.
(1948):14, 244–250.
(1950):1, 33–44.
(1952):76, 1–29.
(1970): 247 pp.
(1977): 50, 53–65.
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Hayashi, I. Ecological distribution of macrobenthic animals on the level bottom in maizuru Bay-I. Journal of the Oceanographical Society of Japan 34, 24–35 (1978). https://doi.org/10.1007/BF02109613
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DOI: https://doi.org/10.1007/BF02109613