Nature in it’s Mysterious Ways: Big Branch Recreation Area

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You can see in these photos a line running across the water, creating a seemingly darker area (closer) and a lighter area (farther away). I have no idea about what caused this and it wasn’t the only line. There were further divisions but this was most easily seen from the car. It was raining and I didn’t want to damage my phone. Anyway, it’s quite mysterious because it’s not as if the lines followed the channel. It was odd and I thought I would share it here.

We an never know everything about nature and even old places can ring surprises.

Roses: Squash Plant Clippings

So, there is thing garden plot outside my front door that used to be maintained by a woman a few doors down. She planted flowers and other plants (not vegetables or food plants) in there for years, ever since I can remember. It was last year or the year before that the people who run the neighborhood had the people who cut the grass and other stuff dig everything up out of the garden plot and dig up the plants in some people’s yards. We don’t know and there really isn’t any reasonable explanation for why they did it. They put in a few common and cheap flowers in there but mostly mulch.

This year though, this vine like plant with huge leaves came up (early in the spring). It grew fast and soon we noticed these orange flowers after awhile. My mom called them squash blossoms and sure enough, somehow, it was a squash plant. No one in the neighborhood grew it, heck, you’d be lucky if half the people in my neighborhood recognized a zucchini if they saw one. It grew and grew and grew and at one point, the mailman was scared of it, having the idea that maybe one day when he went to put the mail in the mailbox that it would grab him, pull him into the thickest part, and eat him. We kept seeing flowers, but no squash. No bees on the flowers either. One day, my mom had the idea to fertilize the flowers with each other so my dad brought a couple of the flowers together, shaking the pollen into each other. Voila, not a whole lot later, maybe a couple weeks, we noticed that squashes had started to grow! So, I decided to snap a few pieces of the vine and me and my dad put them in containers of water so they would sprout and we could have our own squash plant. My parents think it’s pumpkin but I’m going more for acorn squash. Anyway, it must have been a bird that started this all (having eaten a seed and pooped it or dropped it in the garden plot). My aunt says a tomato plant mysteriously started growing one year in her backyard thinking it was most likely a bird too. Yay for birds!

Red Foxes: Firefly Squid (Watasenia scintillans)

W. scintillans is a small squid that occurs only in the waters around Japan. It is a member of the mesopelagic boundary fauna in these waters and is fished commercially with set nets.

Brief diagnosis: 

An enoploteuthid …

  • with large, black photophores at the tips of arms IV.
  • with hooks of manus in one series.

Characteristics

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Figure. Ventral view of W. scintillans. © Kotaro Tsuchiya

From Young, et al., 1998.

  1. Arms
    1. Suckers absent from Arms IV (hooks present).*
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  2. Tentacles
    1. Manus of club with hooks in one series (2-3 in number) and one series of suckers.
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  3. Hectocotylus
    1. Right ventral arm of male hectocotylized.
    2. Hectocotylus with two subequal-sized offset flaps.
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  4. Buccal crown
    1. Dark epithelial pigmentation on oral surface rather than typical chromatophores.*
  5. Head

    1. Beaks: Descriptions can be found here: Lower beak; upper beak.
  6. Photophores
    1. Two to four large organs covered by black chromatophores on tips of arms IV.*
    2. Five organs on eyeball.*
    3. Complex organs of integument, in life, probably with red-colored filters.*

*Characters shared with Abraliopsis.

Distribution

Vertical distribution

Spawned eggs are mainly collected from the surface to 80 m depth.

Geographical distribution

W. scintllans seems to be a mesopelagic boundary species associated with shelf waters.

This species shows high endemism in the waters of Japan and adjacent areas. It is distributed in the northern sector of the East China Sea and the Kii Channel, Central Japan, northward to Japan Sea, Okhotsk Sea, southeast coast of Honshu, transition zone off Sanriku District to 165° E, and the southeast coast of Hokkaido.

Life History

Eggs and Egg masses

The eggs of W. scintillans is ovoidal, 1.5 mm L x 1 mm D, transparent, no coloration but with weak luster reflection. The adult female has several hundred to 20,000 mature eggs in its oviducts.

The egg mass is narrow gelatinous string more than 1 m with a simple row of eggs.

Spawning

In Toyama Bay, middle of the Japan Sea, eggs occurred in the plankton in February – July and November – December. In the offshore area of Shimane Prefecture, western Japan Sea, eggs were found throughout the year except for December and January. The peak of egg occurrence is April to late May.

Spawning grounds in Japan Sea were recognized at the shelf edge in east and west of Oki Island and Toyama Bay. Some spawnings were recognized on Yamato-tai Bank.

Spent females were also collected from the open ocean off Sanriku, the Kuroshio-Oyashio transition zone.

Early development

Fertilized eggs hatch in 14 days at 9.7 °C, 8 days at 13.4 °C and 6 days at 16 °C water tempelature. Lower limit for normal development seems to be at 6 °C (Hayashi, 19**).

At 15 C water temperature:

  1. 1 hr after fertilized: Polar bodies appear.
  2. 6 hrs: First cleavage.
  3. ca. 10 hrs: 100 and more cells.
  4. ca. 16 hrs: Embryonic lobe developed.
  5. ca. 1.5 day: Embryonic lobe covers about half of the egg.
  6. ca. 4 days: Primordial eye appears; oral depression start.
  7. ca. 5 days: Primordial arms, mantle, funnel appear; chromatophore appears on mantle; funnel lobe fused to tube; eye developed.
  8. ca. 8-8.5 days: Hatching; chromatophores appear on head, arm; ink inject in inksac; gill, branchial heart, liver appear.

Hatchling is 1.2-1.4 mm DML, arms, beak, radula, intestinal tract is still primordial; lecithotropic.

Predators

This species is an important food items for bottom fishes and large salmonid fishes in the coastal waters of northern Japan (Yamamura, 1993).

Fisheries Interest

W. scintillans is fished commercially in Japan. Total catches in Japan during 1990-1999 are 4,804 to 6,822 tons per year.

In the Toyama Bay, central Japan Sea, squid are cought by fixed net during March to June (the main fishing period is mid-April to early May). The average catch per year is 2,000 tons (250 million individuals) but the catch is variable in each year around from 500 to 4,000 tons.

In the southwestern coast of Japan Sea, squid are caught by bottom trawl. The amount of the catch during 1990-1999 was 1,873 to 3,638 tons per year.“*

Info Source (*): http://tolweb.org/Watasenia_scintillans/19645

For Videos of Firefly Squid: http://www.arkive.org/firefly-squid/watasenia-scintillans/

Picture Sources (from top): http://wordlesstech.com/2012/04/07/firefly-squid-in-toyama-bay/, http://robertang.blogspot.com/2012/04/firefly-squids-in-toyama-bay-japan.html, http://www.kh-vids.net/showthread.php?123105-The-Glowing-Firefly-Squid-of-Toyama-Japan, http://upall.co/firefly-squid-463.php