Small-scale distribution of juvenile gadoids in shallow inshore waters; what role does maerl play?
Small-scale distribution of juvenile gadoids in shallow inshore waters; what role does maerl play?
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DOI：
10.1016/j.icesjms.2004.02.004
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发表时间：
2004-05-01
影响因子：
3.3
通讯作者：
Hall-Spencer, JM
中科院分区：
文献类型：
--
作者：
Kamenos, NA;Moore, PG;Hall-Spencer, JM
目前认为，底栖渔业的间接影响，如生境退化，正在影响到鳕类种群。梅尔满足苗圃区的先决条件，为几种无脊椎动物物种，所以它的作用，在类似的生态系统服务提供的钆类已得到解决。幼鳕鱼（Gadus morhua），Saithe（Pollachius virens），和青鳕（Pollachius pollachius）在浅水（< 7 m）近岸沃茨调查fykenets和水肺苏格兰西部超过12个月。少年密度最高，从9月至11月，在那个时候，显着更多的是在白天和相关的maerl（缺乏大型藻类覆盖）比植被茂密的岩石和砾石基质。少年鳕鱼全年都存在，而Saithe出现在7月，和青鳕从9月至1月。由于其丰富的食物，maerl可能有一个高容量的幼年gadoids，因此是近岸苗圃系统的重要组成部分。(C)2004年国际海洋考察理事会。由爱思唯尔有限公司出版。保留所有权利。
The indirect effects of demersal fisheries, such as habitat degradation, are currently thought to be impacting gadoid stocks. Maerl fulfils nursery area prerequisites for several invertebrate species, so its role in similar ecosystem service provision for gadoids has been addressed. Juvenile cod (Gadus morhua), saithe (Pollachius virens), and pollack (Pollachius pollachius) in shallow (< 7 m) inshore waters were surveyed with fykenets and scuba off western Scotland over a period of 12 months. Juvenile densities were highest from September to November, and at that time, significantly more were present during the day and associated with maerl (that lacked macroalgal cover) than with heavily vegetated rocky and gravel substrata. Juvenile cod were present throughout the year, whereas saithe appeared in July, and pollack from September to January. With its abundance of food, maerl probably has a high holding capacity for juvenile gadoids, and thus is an important part of the inshore nursery system. (C) 2004 International Council for the Exploration of the Sea. Published by Elsevier Ltd. All rights reserved.