Seagrass habitat reduces vulnerability of red sea bream Pagrus major juveniles to piscivorous fish predator
Seagrass habitat reduces vulnerability of red sea bream Pagrus major juveniles to piscivorous fish predator
复制标题
海草栖息地降低了真鲷幼鱼对鱼食性鱼类捕食者的脆弱性
DOI：
10.1111/j.1444-2906.2007.01466.x
复制
发表时间：
2007
影响因子：
1.9
通讯作者：
M. Hamaguchi
中科院分区：
文献类型：
--
作者：
J. Shoji;K. Sakiyama;Masakazu Hori;G. Yoshida;M. Hamaguchi
在中生态系统中进行了捕食实验，以检验栖息地复杂性影响真鲷幼鱼对鱼食性鱼类捕食者的脆弱性的假设。在两个结构不同的栖息地中对幼鱼的行为进行了长达 6 小时的视频记录：长有海草大叶藻的码头，以及没有植被的 0.5 吨水箱。在整个试验过程中，在植物池中观察到与海草的关联行为。将 30 条红鲷幼鱼（体长 29.9 毫米）暴露于两个食鱼鱼捕食者中华鲈鱼 Lateolabrax sp 的个体中进行了捕食实验。 （261.6 毫米），在 1.0 吨罐中持续 6 小时。植被池中的捕食率（每个捕食者每小时捕食的鱼数量）（0.02/捕食者每小时）显着低于无植被池中的捕食率（0.27/捕食者每小时）。目前的实验表明，栖息地的复杂性通过充当物理和/或视觉障碍并限制捕食者追逐和捕获猎物的能力，降低了幼年红海鲷被食鱼鱼捕食的脆弱性。日本周围浅海沿岸水域的海草床被认为是红鲷的重要繁殖地，因为它们为幼鱼提供了复杂的栖息地，并充当了觅食地。
Predation experiments were conducted in mesocosms to test the hypothesis that habitat complexity affects vulnerability of red sea bream Pagrus major juveniles to piscivorous fish predators. Juvenile behavior was video-recorded for 6 h in two structurally different habitats: vegetated with sea grass Zostera marina, and unvegetated 0.5-t tanks. Association behavior with seagrass was observed in the vegetated tank throughout the trials. Predation experiments were conducted with 30 red sea bream juveniles (29.9 mm body length) exposed to two individuals of the piscivorous fish predator Chinese sea bass Lateolabrax sp. (261.6 mm), for 6 h in 1.0-t tanks. Predation rate (no. of fish predated on per predator per h) was significantly lower in the vegetated tank (0.02/predator per h) than in the unvegetated tank (0.27/predator per h). Present experiments indicate that habitat complexity reduces vulnerability of juvenile red sea bream to predation by piscivorous fish by serving as physical and/or visual barriers and limiting the predator’s ability to pursue and capture prey. Seagrass beds in the shallow coastal waters around Japan are suggested to be an important nursery for red sea bream since they provide the juveniles with habitat complexity as well as serve as a feeding ground.
河口和近海育苗场石鲽幼鱼生长、摄食和皮质醇水平的比较。
DOI：
--
发表时间：
2003
期刊：
Journal of Fish Biology 63
影响因子：
--
作者：
YAMASHITA;Y.
通讯作者：
Y.