[Aug 2nd, 2015] – Leasure Day (Team Tall Hairy Groovebur)
[2015年8月2日] 休息日 (Tall Hairy Groovebur小队)
Blog Entry Written by Team: Tall Hairy Groovebur
Team Members: Jagmeet Raina(York) Xiaoyu Yu(BNU) Yuewei Liu(Tongji) Mengqi Wang(Fudan)
Weather: Sunny, Temp:12-23℃，
The early bird catches the worm, so does the early people.Our valuable leisure day began with the most beautiful sunrise that we have ever seen.Waking up at 5:30 am, we took a relaxing walk to the boathouse to watch the sunrise. One side of the sky started to be brighter and brighter, with a shining golden edge above the mountainous hills; the other side, the moon hanging on the blue dome.Then the sun jumped out from the horizon line without me even noticing it. The shinning sun light just spread on the surface of the lake like a nice pieceof silk, and water mist floated, moved slowly along the lake shore. Admiring the magnificent scenery of nature, we felt that all personal affairs seem to be of little moment. We also heard chickadees, song sparrows and blue jays calling, saw Chipmunks searching for food.
What a nice day! During the leisure time in the morning, we went sightseeing by canoe which weighs nearly a human, having so much fun. Sitting on the canoe heading the other side of the Opinicon Lake, we appreciate the beautiful scene as well as the gentle breezeblowing on the face. When docking the boat, we found several water snakes lying under sun to warm their bodies. They were scared by our docking and jumped into lake as soon as we stepped on the docking site. We bought some tasty ice cream there as well and enjoyed the beautiful sightseeing.
We also played volleyball this afternoon. Dr. Wang joined us too, joking a lot. We split, hit the ball in all directions and having a good time.
At night, we held the last presentations during the seminar. The topics are ”Industrial and urban contamination/pollution” and “Biological indicator species”. We discussed the main driving forces of urbanization and the pollution it takes, as well as the function and restoration of indicator species. Looking back at the 8 seminars, we learned a lot. They not only increased our knowledge, but made us appreciate the impact of ideas of students from different countries, which wetreasured most.
The following part is written by Jagmeet Raina.
On August 2nd around 11:45 pm, I decided to go to the docks to better understand the species which are present near the shoreline at night. Upon reaching the dock, it could be seen that that the water was very calm and as I turned on my headlamp, I could see thousands of shimmering coins flashing away from in the water. This shimmer was the reflecting of my headlamp on the iridescent scales of Lepomis Microchirus more commonly known as Bluegill.
The sheer number of individuals amazed me and made me think why they would be in such large numbers at the shoreline at this time? Was it because the fact that the water temperature dropped at night? Were these fish feeding on a prey species that comes out at this time? While I was pondering these questions in my head and setting up my jig for a cast, I heard a splash a couple yards away from me. My question was answered.
A bluegill had jumped out of the water to feed on an insect which has made its way on to the water surface. I start to look around at the surface of the water and I see an array of flying insects hovering above the water. Now that I had my jig rigged up, I threw my first cast off over a weed bed which is situated between rocky shorelines. I choose to actively angle using a white tube jig with a large hook, which would target multiple piscivorous species.
As I reeled in my first cast I felt a significant tug, which got my adrenaline pumping. This was not the tug of a Bluegill or Pumpkinseed, or even a Rock bass, it was infact my favorite native fish species. As I brought in my line, my light flashed on the fish’s scales and kaleidoscopic patterns molted in green and black. It was a Black Crappie (Pomoxis nigromaculatus), and I had never caught on of this size before. The morphology of the fish is what attracts me to this fish the most. Its dorsal fin is very unique, and looks very similar to its anal fin. What could be the possible reasoning behind these unique looking dorsal fins? Could it have to do with the fish’s laterally compressed body? I know that it is a piscivorous fish as it has a large mouth which extends down below its eyes, but could these dorsal fins help the crappie catch prey fish by swimming in bursts or help it chase fish for long distances?
A couple casts later another crappie was caught indicating that there was most likely a school of them. One thing I do know is that these crappie were most likely feeding on the smaller bluegill which were moving along the shoreline.
早起的鸟儿有虫吃，早起的人儿也一样。我们宝贵的休息日从最美的日出开始。清晨5：30起床，我们踱步到船屋去欣赏日出，天从一侧开始渐渐亮了起来，为群山描绘了金色的轮廓线，另一侧却是月亮挂在空中。不经意间，太阳渐渐的从地平线上挣脱出来。阳光洒满湖面，像是一匹精致的丝稠，波纹沿着岸边荡漾开来。陶醉于壮美的自然中，所有的烦心事都消失了。我们同样听到了chickadees, song sparrows 和blue jays的优美叫声，看到了Chipmunks在寻找食物。
美好的一天! 在上午的休息时间,我们划着一人重的独木舟游湖观光。我们的目的地是Opinicon Lake的另一侧，在微风吹拂下，我们享受了优美的湖上风光。在目的地登陆时，我们在码头发现了数条晒太阳的水蛇，登陆的声音吓的它们纷纷窜入水中四散游走。登陆后，我们享用了当地的美味冰淇淋。
这声音来自一只跳出水面捕捉昆虫的Bluegill，这就是它们夜间在湖水表面聚集的原因。我向湖面四周眺望，发现了一群飞虫在湖面上方徘徊。我架好了鱼杆，向水面扔出了鱼钩。我选择了一个灵活的角度，使用的是较大的鱼钩，目标是多种piscivorous品种。在试图收回鱼线时，我感受到了明显的阻力，我很兴奋，因为这种阻力显然不是由Bluegill 或Pumpkinseed带来的，我钩到的肯定是我最喜欢的本地鱼种。收回鱼线后，头灯的灯光在鱼身上反射出绿色和黑色的万花筒般的光芒。这是一只Black Crappie (Pomoxis nigromaculatus)，而且个头极大。这种鱼最吸引我的地方是它的体形，它的背鳍很特别并且很像它的臀鳍，这是为什么呢？和它薄薄的身形有关吗？我知道这是它是piscivorous品种，因为它的嘴巴很大，能够延伸到它的眼镜下面。这种背鳍能够增加它捕猎时的爆发力还是耐力呢？一段时间后，我又捕到了几只Crappie，说明这里有一群Crappie。不过我确实知道这种Crappie以捕猎靠近岸边游动的Bluegill为生。