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Non-native regal demoiselle, Neopomacentrus cyanomos, presence, abundance, and habitat factors in the North-Central Gulf of Mexico
Biological Invasions ( IF 2.9 ) Pub Date : 2021-01-02 , DOI: 10.1007/s10530-020-02424-0
Joseph H. Tarnecki , Steven B. Garner , William F. Patterson

Remotely operated vehicle (ROV) surveys were conducted at reef sites in the northern Gulf of Mexico (nGOM) during 2018–2019. Artificial (AR = 63) and natural (NR = 139) reefs were located in a 2 × 105 km2 area south of Mobile, AL to Destin, FL at depths of 13–75 m. We observed a total of 5371 damselfishes (Family: Pomacentridae) belonging to eight taxa. The non-native regal demoiselle (regal), Neopomacentrus cyanomos, was present at 30.2% of ARs but only 1.4% of NRs with densities ranging from 0.19 to 18.11 fish per 100 m2. Regals were most dense at shallow ARs, comprising 53% of the damselfish community, and least dense at deeper reefs comprising < 1% of observed damselfishes. Results from generalized linear mixed models (GLMMs) indicated the interaction among reef type, complexity, relief, and depth had a significant effect on regal density but that reef type (36%) and the interaction between reef type and depth (25%) explained the greatest proportions of variance in the data (partial η2) while the interaction among all four main effects explained only a small amount (2%). Our data indicate regals prefer shallow artificial structures with low complexity but can occupy deeper reefs, including NRs, despite less-favorable conditions. Our data document the persistence of regals in the nGOM and identify habitat factors that are significantly related to their presence and density in the region. However, the dynamics controlling their distribution are still uncertain and potential negative impacts on native reef fish communities remain unclear.



中文翻译:

墨西哥中北部海湾地区的非本地富豪闺女,新近生氰虫,存在,丰度和栖息地因素

在2018-2019年期间,在墨西哥湾北部(nGOM)的珊瑚礁现场进行了遥控车辆(ROV)调查。人工鱼礁(AR = 63)和天然鱼礁(NR = 139)位于阿拉巴马州莫比尔以南至佛罗里达州德斯汀以南2×10 5  km 2的区域,深度为13–75 m。我们观察到总共属于5个类群的5371雀鲷(家庭:Pomacentridae)。每100 m 2鱼类的非本地富豪闺女(Neopomacentrus cyanomos)占AR的30.2%,但NR仅占1.4%。。富豪区在浅色AR处密度最高,占该地区雀鲷群落的53%,而在较深的礁石上密度最低,占所观察到的雀鲷的1%。广义线性混合模型(GLMM)的结果表明,礁石类型,复杂性,浮雕和深度之间的相互作用对河床密度有显着影响,但该礁石类型(36%)以及礁石类型与深度之间的相互作用(25%)得到了解释方差的数据(部分η的最大比例2),而所有四个主要效果之间的相互作用仅说明了少量(2%)。我们的数据表明,尽管条件较差,但富豪更喜欢复杂度较低的浅层人工结构,但可以占据更深的珊瑚礁,包括天然橡胶。我们的数据记录了nGOM中富豪的持久性,并确定了与该地区的存在和密度显着相关的栖息地因素。但是,控制其分布的动力学仍然不确定,并且对本地珊瑚礁鱼类群落的潜在负面影响仍不清楚。

更新日期:2021-01-02
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