Growth and Age Structure of the Lancelet Branchiostoma belcheri in the Seto Inland Sea, in Relation to Water Temperature
-
- Saito Hidetoshi
- Graduate School of Biosphere Science, Hiroshima University
-
- Imabayashi Hiromichi
- Graduate School of Biosphere Science, Hiroshima University
-
- Ito Mika
- Graduate School of Biosphere Science, Hiroshima University
-
- Kawai Koichiro
- Graduate School of Biosphere Science, Hiroshima University
この論文をさがす
抄録
Abstract: Growth and age structure of the lancelet Branchiostoma belcheri was studied in the Seto Inland Sea, Japan, throughouthe year. A total of 3, 601 lancelets were collected by means of dredging. Spawning of the lancelets occurred from late June to late July. Changes in modal size on the length-frequency histograms showed that the lancelets settled on sandy sediment after four to five months of planktonic life when they grew to 7.0 mm BL. Mean body lengths of the lancelets at an age of one, two and three years appeared to be 10.9, 28.0and 33.0 mm, respectively. Most individuals developed gonads after an age of two years at 25 mm BL. The sex ratio(males: females)was 0.97: 1, and the size composition was not diffbrent between sexes. Growth rate and life span of lancelet species increased and decreased at the high temperature habitats, respectively.
収録刊行物
-
- BENTHOS RESEARCH
-
BENTHOS RESEARCH 58 (2), 105-112, 2003
日本ベントス学会
- Tweet
詳細情報 詳細情報について
-
- CRID
- 1390282680457870592
-
- NII論文ID
- 10016213250
- 130004997568
-
- NII書誌ID
- AN10565057
-
- ISSN
- 18838901
- 02894548
-
- NDL書誌ID
- 6819586
-
- 本文言語コード
- en
-
- データソース種別
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- 抄録ライセンスフラグ
- 使用不可