Range expansion of the invasive portunid crab Charybdis japonica in New Zealand

IF 1.4 4区 环境科学与生态学 Q3 FISHERIES
Kyle Hilliam, I. Tuck
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引用次数: 1

Abstract

ABSTRACT Charybdis japonica, a large invasive portunid, has been recorded in New Zealand since its detection in the Waitematā Harbour in 2000. In this study, the distribution, invasion history, abundance and population structure were investigated for C. japonica across the North Island of New Zealand. This was done using various distribution data available, trapping across several sites and interviews with commercial fishermen. Charybdis japonica was detected in the previously uninvaded Tauranga, Ohiwa, Hokianga, Manukau Harbours and Great Barrier Island. The rate of spread for C. japonica is continuous, with harbours or estuaries hundreds of kilometres apart having detections every two to three years. Population abundances reported by commercial fishermen constantly increased, with no signs of stabilisation or decrease. Catches were male-biased, with female abundance varying seasonally. Several possible pathways and vectors may be responsible for this spread, including shipping and aquaculture, on top of dispersal of larvae by currents across the North Island. Further research is required to determine population sources, with findings providing important information for invasive species monitoring and management.
入侵性梭子蟹在新西兰的活动范围扩大
摘要:自2000年在Waitematā港被发现以来,新西兰已记录到一种大型入侵梭子蟹。在本研究中,对新西兰北岛的日本血吸虫的分布、入侵历史、丰度和种群结构进行了调查。这是利用各种可用的分布数据完成的,在几个地点进行诱捕,并采访了商业渔民。在之前未被入侵的陶朗加、奥希瓦、霍基昂加、马努考港和大堡岛发现了日本Charybdis japonica。日本血吸虫的传播速度是连续的,相隔数百公里的港口或河口每两到三年检测一次。商业渔民报告的人口丰度不断增加,没有稳定或减少的迹象。捕获物偏向雄性,雌性数量随季节变化。几种可能的途径和媒介可能是造成这种传播的原因,包括航运和水产养殖,以及通过北岛洋流传播幼虫。需要进一步的研究来确定种群来源,研究结果为入侵物种的监测和管理提供了重要信息。
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来源期刊
CiteScore
4.50
自引率
12.50%
发文量
35
审稿时长
3 months
期刊介绍: Aims: The diversity of aquatic environments in the southern continents and oceans is of worldwide interest to researchers and resource managers in research institutions, museums, and other centres. The New Zealand Journal of Marine and Freshwater Research plays an important role in disseminating information on observational, experimental, theoretical and numerical research on the marine, estuarine and freshwater environments of the region.
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