Biology and population dynamics of Donax trunculus L. (Bivalvia: Donacidae) in the South Adriatic Coast (Italy)

被引：74
|
作者：
Zeichen, MM
Agnesi, S
Mariani, A
Maccaroni, A
Ardizzone, GD
机构：
[1] Univ Roma La Sapienza, Dept Anim & Human Biol, I-00185 Rome, Italy
[2] AGEI, Rome, Italy
来源：
ESTUARINE COASTAL AND SHELF SCIENCE | 2002年 / 54卷 / 06期
关键词：
bivalve molluscs; population dynamics; reproduction; life cycle; Adriatic Sea;
D O I：
10.1006/ecss.2001.0868
中图分类号：
Q17 [水生生物学];
学科分类号：
071004 ;
摘要：
Biology and population dynamics of the suspension-feeding wedge clam Donax trunculus (Linnaeus, 1758) were studied for 13 months (November 1994-April 1996) along the Italian Southern Adriatic coast near the Lagoon of Lesina. Specimens were found at depths between 0 and 2 m, mainly in fine grain bottoms. The spatial coastal distribution showed an intraspecific segregation between young and adult wedge clams. A unimodal recruitment (length >4 mm) occurred in winter (December-February). Length frequency distributions were used to determine age and growth rate. Three year classes were regularly observed and their growth pattern defined. The population showed a maximum length of 37 mm and a longevity of 4 years. Analysis of seasonal variations in the reproductive cycle showed that gametogenesis occurred in spring in females. After the spawning season (March-July) females of D. trunculus remained in a resting stage from August to January. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：971 / 982
页数：12
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