SEASONAL CHANGES IN REPRODUCTION AND BIOCHEMICAL COMPOSITION OF THE COCKLE, FULVIA MUTICA REEVE (1884), IN CHEONSU BAY OFF THE WEST COAST OF KOREA SCIE SCOPUS

Cited 7 time in WEB OF SCIENCE Cited 10 time in Scopus
Title
SEASONAL CHANGES IN REPRODUCTION AND BIOCHEMICAL COMPOSITION OF THE COCKLE, FULVIA MUTICA REEVE (1884), IN CHEONSU BAY OFF THE WEST COAST OF KOREA
Author(s)
Yang, Hyun-Sung; Kang, Do-Hyung; Park, Heung-Sik; Choi, Kwang-Sik
KIOST Author(s)
Kang, Do Hyung(강도형)Park, Heung Sik(박흥식)
Publication Year
2011-04
Abstract
This is the first study of seasonal changes in gonad development and tissue biochemical composition of the cockle Fulvia mutica in Cheonsu Bay off the west coast of Korea. Gametogenesis commenced in December when the surface water temperature was 9.1 degrees C. In May, the first discharge of oocytes was observed, and spawning continued until October. The condition index (CI), a ratio of tissue dry weight to shell dry weight, increased gradually from late May to July and declined dramatically in August and September, indicating that active discharge of gametes occurred in the bay during this period. Histology and the CI suggested that F. mutica spawning in Cheonsu Bay is continuous from early summer to early fall, with two spawning peaks in June and July, and September and October. All cockles examined in November were sexually inactive. The relatively low CI recorded in late fall to mid winter (November to January) coincided with high levels of ash and low levels of lipids and carbohydrates in the tissue, whereas protein levels remained unchanged. The observed spawning pattern of F. mutica in Cheonsu Bay suggests that the currently established timing for fishing closure, from July to September, should be expanded from June to October to protect early-spawning broodstocks. This change may secure recruitment and lead to a subsequent increase of the wild cockle population in the bay.
ISSN
0730-8000
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/3879
DOI
10.2983/035.030.0114
Bibliographic Citation
JOURNAL OF SHELLFISH RESEARCH, v.30, no.1, pp.95 - 101, 2011
Publisher
NATL SHELLFISHERIES ASSOC
Subject
CLAM RUDITAPES-PHILIPPINARUM; OYSTER CRASSOSTREA-GIGAS; PACIFIC OYSTER; GAMETOGENIC CYCLE; GROWTH; ESTRADIOL-17-BETA; MATURATION; DECUSSATUS; BIVALVIA; MOLLUSCA
Keywords
Fulvia mutica; cockle; gametogenesis; biochemical composition; broodstock management; Korea
Type
Article
Language
English
Document Type
Article
Publisher
NATL SHELLFISHERIES ASSOC
Related Researcher
Research Interests

Marine ecology,Marine biology,Marine living resources,해양생태,해양생물 생리,해양생물자원

Files in This Item:
There are no files associated with this item.

qrcode

Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse