Hunt D E, Rawlinson N J F, Thomas G A, Cobcroft J M
Northern Hub, Institute for Marine and Antarctic Studies, University of Tasmania, Locked Bag 1370, Launceston, TAS 7250, Australia.
Northern Hub, Institute for Marine and Antarctic Studies, University of Tasmania, Locked Bag 1370, Launceston, TAS 7250, Australia.
Vision Res. 2015 Jun;111(Pt A):13-21. doi: 10.1016/j.visres.2015.03.017. Epub 2015 Apr 11.
The eye is an important sense organ for teleost species but can vary greatly depending on the adaption to the habitat, environment during ontogeny and developmental stage of the fish. The eye and retinal morphology of eight commonly caught trawl bycatch species were described: Lepidotrigla mulhalli; Lophonectes gallus; Platycephalus bassensis; Sillago flindersi; Neoplatycephalus richardsoni; Thamnaconus degeni; Parequula melbournensis; and Trachurus declivis. The cone densities ranged from 38 cones per 0.01 mm(2) for S. flindersi to 235 cones per 0.01 mm(2) for P. melbournensis. The rod densities ranged from 22800 cells per 0.01 mm(2) for L. mulhalli to 76634 cells per 0.01 mm(2) for T. declivis and potential visual acuity (based on anatomical measures) ranged from 0.08 in L. gallus to 0.31 in P. melbournensis. Higher rod densities were correlated with maximum habitat depths. Six species had the regular pattern of four double cones arranged around a single cone in the photoreceptor mosaic, while T. declivis had only rows of double cones. P. melbournensis had the greatest potential ability for detecting fine detail based on eye anatomy. The potential visual acuity estimates and rod densities can be applied to suggest the relative detection ability of different species in a commercial fishing context, since vision is a critical sense in an illuminated environment for perceiving an oncoming trawl.
眼睛是硬骨鱼类重要的感觉器官，但会因对栖息地的适应、个体发育过程中的环境以及鱼的发育阶段而有很大差异。本文描述了八种常见的拖网兼捕鱼类的眼睛和视网膜形态：穆氏棘鲬；黑喉帆鱼；巴氏扁头鲉；弗氏银鲈；里氏新平鲉；德氏单角鲀；墨尔本准雀鲷；和斜竹荚鱼。视锥细胞密度范围从弗氏银鲈的每0.01平方毫米38个视锥细胞到墨尔本准雀鲷的每0.01平方毫米235个视锥细胞。视杆细胞密度范围从穆氏棘鲬的每0.01平方毫米22800个细胞到斜竹荚鱼的每0.01平方毫米76634个细胞，潜在视力（基于解剖学测量）范围从黑喉帆鱼的0.08到墨尔本准雀鲷的0.31。较高的视杆细胞密度与最大栖息深度相关。六种鱼类在光感受器镶嵌体中有围绕单个视锥细胞排列的四个双视锥细胞的规则模式，而斜竹荚鱼只有双视锥细胞行。基于眼睛解剖结构，墨尔本准雀鲷具有检测精细细节的最大潜在能力。潜在视力估计值和视杆细胞密度可用于表明在商业捕鱼环境中不同物种的相对检测能力，因为在有光照的环境中，视觉是感知迎面而来的拖网的关键感觉。
