Archive for January, 2018


TAXONOMY
Kingdom: Plantae
Phylum: Charochyta
Class: Equisetopsida
Order: Malpighiales
Family: Rhizophoraceae

Genus/species: Rhizophora mangle

GENERAL CHARACTERISTICS: Height from 6–15 m (20-50 ft); has multiple prop roots descending from widely spreading branches; reddish-brown. Their unique prop roots system also help the tree to combat hypoxia by allowing it a direct intake of oxygen through its root structure. The tree produces pale pink flowers in the spring.

 

DISTRIBUTION/HABITAT: Native to tropical estuarine ecosystems throughout the tropics in the New World, Atlantic and Pacific coastlines plus Galapagos Islands; Western coast of Africa and Pacific islands.
They are found in salt-saturated sand or mud, inundated twice daily, along tropical seacoasts, river and estuary margins; often adjacent to coral reefs.

REPRODUCTION: Its viviparous “seeds,” called propagules (reality a living tree) become fully mature plants before dropping off the parent tree.

CONSERVATION: They are planted to stabilise and reduce erosion of coastal land.

REMARKS: Red mangroves are harvested to provide timber for building, fencing, fuel and charcoal and they are planted to stabilise and reduce erosion of coastal land.

R. mangle are considered an invasive species in some locations, such as Hawaii, where they forms dense, monospecific thickets. However Mangroves are important providing  nesting and hunting habitat for a diverse array of organisms, including fish and birds as well as preserving the shore lie in storms.

References

California Academy of Sciences Steinhart Aquarium The Shallow Reef and Mangrove Pop-Up,Main floor (level one) 2018

Ron’s flickr.  https://www.flickr.com/photos/cas_docents/24236128013/in/album-72157675807621922/

Ron’s WordPress Shortlink wp.me/p1DZ4b-1Ud

Atlas of Living Australia  bie.ala.org.au/species/NZOR-4-89998

bie.ala.org.au/species/NZOR-4-89998#classification

Eden Project  www.edenproject.com/learn/for-everyone/plant-profiles/red…

Smithsonian Marine Station. www.sms.si.edu/irlspec/rhizop_mangle.htm

EOL eol.org/pages/2942884/details

TAXONOMY
Kingdom: Animalia
Phylum: Mollusca
Class: Bivalvia
Subclass: Pteriomorphia
Order: Pectinoida
Family: Pectinidae

Genus/species: Crassedoma giganteum

GENERAL CHARACTERISTICS: Giant Rock Scallops have coarsely ribbed shells called valves. The upper valve is usually scallop-shaped but the lower valve takes the shape of the substrate to which it’s attached. Between the valves, the margin of the orange mantle can be seen, with a row of tiny blue eyes and a sparse fringe of short tentacles

SIZE: up to a diameter of 15 centimetres (5.9 in) in the intertidal zone and 25 centimetres (9.8 in) in the subtidal zone.

DISTRIBUTION: Pacific coast California and Canada and south to Baja California and Mexico usually inside crevices and under boulders, or cemented to rock surfaces, Depth down to about 80 metres (260 ft).

DIET IN THE WILD: C. gigantea is a suspension feeder, filtering phytoplankton from water as it passes over the gills. The particles are moved by cilia along grooves to the mouth where edible matter is separated from sediment particles. The waste is incorporated into mucous balls which are removed from the mantle cavity periodically by a clapping of the valves.

REPRODUCTION: The sexes are separate in C. gigantea. The veliger larvae that develop from the eggs form part of the zooplankton for about 40 days before settling, undergoing metamorphosis and beginning to form a shell. Juveniles are free-living, are able to swim and can attach themselves temporarily to the substrate by byssus threads. 

PREDATORS: Sunflower starfish (Pycnopodia helianthoides) and purple sea star (Pisaster ochraceus).

REMARKS: The scallops eyes can’t see images as we can, but they allow the scallop to adjust to the brightness of light. This can be of benefit when it opens its protective shells to pump water over their gills filtering food thus exposing its soft body parts to predators. As a predator approaches at least some light will be blocked and the scallop closes it shells.

References

California Academy of Sciences Steinhart Aquarium Dr Charles Delbeek 2018

Ron’s flickr  https://www.flickr.com/photos/cas_docents/39884701811/in/album-72157675344287795/

iNaturalist  www.inaturalist.org/taxa/54526-Crassadoma-gigantea

Global species: www.globalspecies.org/ntaxa/913354

Reef.org www.reef.org/resources/galleries/invertebrate?page=1

Eyes. www.chuckkopczakphotography.com/blog/2015/11/13/the-eyes-…

TAXONOMY
Kingdom: Animalia
Phylum: Echinodermata
Class: Echinoidea
Order: Temnopleuroida
Family: oxopneustidae

Genus/species: Tripneustes sp.

GENERAL CHARACTERISTICS: The white sea urchin is a typical, although large, member of the sea urchin (Echinoidea) group. Anatomy is similar to all urchins,
The mouth is a complex protrusible structure known as the Aristotle’s lantern

DISTRIBUTION/HABITAT: It is found along the west coast of Africa and along the western central Atlantic Ocean from Bermuda, to the Carolina coast of the United States of America, and the Caribbean to Brazil. They live in a variety of shallow water habitats including rocky rubble, algal rock flats and seagrass beds.

DIET: Algae

REPRODUCTION: The reproductive system of the white sea urchin consists of five gonads, The gonads are not only the source of eggs or sperm, which are referred to as roe, but also serve as the main nutrient storage organ.

CONSERVATION: The White Sea Urchin is fished heavily. leading to increasing scarcity. Restrictions apply in most areas.

References

California Academy of Sciences Steinhart Aquarium, Shallow Coral Reef 2018

Ron’s flickr  https://www.flickr.com/photos/cas_docents/25651292438/in/album-72157623903687834/

Ron’Wordpress Shortlink wp.me/p1DZ4b-1U3

FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS www.fao.org/docrep/013/i1751e/i1751e.pdf

atj.net.au/marineaquaria/Tripneustes_sp_.html

TAXONOMY
Kingdom: Animalia
Phylum: Chordata
Class: Elasmobranchii (sharks and rays)
Order: Carcharhiniformes (Ground sharks; characterized by the presence of a nictitating membrane over the eye, two dorsal fins, an anal fin, and five gill slits.)
Family: Scyliorhinidae (Cat sharks; elongated cat-like eyes and a patterned appearance, ranging from stripes to patches to spots)

Genus/species: Cephaloscyllium ventriosum

SwellShark14479061579_a24e4ac80e_b

GENERAL CHARACTERISTICS: Swell sharks have a stout body with flat, broad head; short snout; huge mouth,  proportionally larger that the great white shark (Carcharodon carcharias). Teeth are at front of jaws with dagger-like central point and 1-2 small points on each side; two dorsal fins: first much larger, with origin over pelvic fins, second dorsal fin considerably smaller than first, its origin over origin of anal fin. The body is light brown with dark patches covered with black dots.

Length up to 3.2 ft.

DISTRIBUTION/HABITAT: Central California to southern Mexico; also reported near central Chile.
Found in rocky reefs and kelp forests, from surface to 460 m (1500 ft), in temperate and subtropical waters.

Swell Shark 3426936973_ee6379d9fb_b

DIET IN THE WILD: C. ventriosum is nocturnal; feeding on crustaceans and fishes, (often blacksmiths). They are lie-in-wait predators that sit on the bottom with wide-open mouth, ready to ambush unsuspecting prey. (slowly opens jaws; lies in wait for prey to swim inside).

egg case above

REPRODUCTION: Oviparous; female lays amber-colored egg cases that hatch in 8–10 months. Egg case (“mermaid’s purse”) is 9 – 13 centimeters (3.5 – 5 inches) long, 3 – 6 centimeters (1 – 2.3 inches) wide. Young have enlarged toothlike denticles on the back that help them break through egg cases. Pups measure 14 – 15 centimeters (5.5-6 in) at birth; immediately feed on their own.

Embryos may be eaten by snails that bore through egg cases.

Pup  below on top of egg case

PREDATORS:  If caught it is, usually it will be released because its flesh is of poor quality.    Life span: 25 or more years.

CONSERVATION: IUCN Red List: least concern species

REMARKS: C. ventriosum hides in caves and crevices during normal aquarium hours. the day, and so is often not to be seen during aquarium hours. Common and specific (ventriosum = “largebelly”) names come from its ability to take in water that makes it appear up to twice as large as its normal size, a difficult meal for predators to bite or to remove from a crevice. If caught and brought to the surface, it can swell its body with air.

When caught by fishermen and brought out of water, the release of gulped water/air can cause the swell shark to “bark”.

Occurs in aggregations while resting, sometimes piled one on top of the other.

Southern California Coast Kelp Exhibit Tidepool young with egg cases.

References

California Academy of Sciences Steinhart Aquarium Southern California Coast Kelp Exhibit 2018

Ron’s WordPress shortlink wp.me/p1DZ4b-XL

Ron’s flickr 7608440813109/www.flickr.com/photos/cas_docents/14479061579/in/set-7215

fishbase www.fishbase.org/summary/802

Marine bio.org marinebio.org/species.asp?id=383

 eol eol.org/pages/208742/details

Sean Donahoe, CAS docent, materials from the Naturalist Center and collaborated with Docent Program staff document.

Works Cited

1. Carwardine, M. 2004. Shark. Firefly Books. Buffalo. 168 p.

2. Michael, S.W. 1993. Reef Sharks and Rays of the World: A guide to their

identification, behavior, and ecology. Sea Challengers. Monterey. 107 p.

3. Parker, S. and Parker, J. 1999. The Encyclopedia of Sharks. Firefly Books.

Buffalo. 192 p.

4. Ebert, D.A. 2003. Sharks, Rays, and Chimeras of California. University of

California Press. Berkeley/Los Angeles. 284 p.

5. Springer, V.G. and Gold, J.P. 1989. Sharks in Question. Smithsonian Institution

Press. Washington, D.C. 187 p.

 

 

TAXONOMY
Kingdom: Animalia
Phylum: Chordata
Class: Sauropsida
Order: Testudines
Suborder: Cryptodira
Superfamily: Testudinoidea
Family: Geoemydidae

Genus/species: Heosemys spinose

GENERAL CHARACTERISTICS: The sharp, pointed, spiky-edged carapace, and spiny keel are unique to this turtle. See photo at  Arkive   http://www.arkive.org/spiny-turtle/heosemys-spinosa/image-G20738.html
It is thought that this spiny ‘armour’ acts as a deterrent to predators, such as snakes. However, the, strongly-serrated carapace edge and spiny keel become worn down and are lost with age, so that larger individuals are much smoother than juveniles and less likely to be needed.
The carapace is brown with a pale streak down the central keel, and the head and limbs are greyish-brown, usually with a yellow to red spot behind the eye and similar-coloured speckling on the legs.

Length carapace; up to 220 mm (8.6 in)
Weight up to 2 kg (6.6 lbs)

DISTRIBUTION/HABITAT: Southeast Asia, from Thailand and possibly southern Myanmar southward through Malaysia to Sumatra, Borneo and Natuna, numerous small Indonesian Islands and the Philippines.
This semi-aquatic species is found in shallow, wooded mountain streams, but spends considerably time on land foraging or burrowing amongst the leaf litter of the forest floor.

DIET IN THE WILD: Apparently herbivorous in the wild, preferring fruits and vegetables, but will accept some animal foods in captivity.

CONSERVATION: IUCN Endangered
The spiny turtle is in grave danger of extinction due to over-collection from the wild for the Asian food market and international pet trade, as well as being threatened by the destruction of its habitat.
This species is difficult to breed in captivity but some institutions have been successful bred. (Atlanta and Knoxville Zoos in the US., and Durell Wildlife in Jersey, Europe

References

California Academy of Sciences Rainforest (L2) 2018

Ron’s flickr https://www.flickr.com/photos/cas_docents/38899859424/in/dateposted-public/

IUCN Red List August 2017. www.redlist.org

Ecology Asia. www.ecologyasia.com/verts/turtles/spiny_terrapin.htm

Arkive. http://www.arkive.org/spiny-turtle/heosemys-spinosa/image-G20738.html 

Ron’s WordPress shortlink wp.me/p1DZ4b-1TR

 

 

TAXONOMY
Kingdom:Animalia
Phylum: Chordata
Class: Amphibia
Order: Caudata
Family: Salamandridae

Genus/species: Neurergus kaiseri

GENERAL CHARACTERISTICS: N. kaiseri has a distinctive, spectacular coloration, with a long narrow yellow or orange-red dorsal stripe overlaying bleached white (spots or a continuous band) on a black background. The bottom is whitish or orange-red, and may have black markings.

Length up to 14 cm (5.5 in)

DISTRIBUTION/HABITAT: Native to the central Zagros Mountains of Iran in the Lorestan and Khuzestan provinces. N. kaiseri comes from a hot dry climate. They reproduce in winter during periods of rain, which are followed by long periods of hot dry weather in which the animals estivate. It is estimated that water is present in their habitat for 3 months of the year or less.

DIET in captivity: They are fed small earthworms (whole or chopped), lesser wax worms, large fruit flies, maggots, tropical woodlice, and crickets of appropriate size.
They are not picky eaters.

REPRODUCTION: Eggs are deposited singly on rough surfaces on the underside of stones and also use vegetation.

CONSERVATION: IUCN Vulnerable. The population is considered to be severely fragmented as per IUCN guidelines given the habitat where it occurs and the relatively low vagility of the species. The species is illegally harvested for the national and international pet trade Its biggest threat. It is believed that less than 1000 adults exist in nature. N. kaiseri has become the first example of a species granted international protection due to e-commerce.

REMARKS: A captive breeding program is in place at the Sedgwick County Zoo in Wichita, Kansas, which now has hundreds of surplus captive-bred N. kaiseri.

References

California Academy of Sciences Steinhart Aquarium, Water is life precious little water 2018

Ron’s flickr  https://www.flickr.com/photos/cas_docents/25770028168/in/album-72157662092331262/

Amphibia web. amphibiaweb.org/cgi/amphib_query?query_src=aw_lists_gener…

IUCN www.iucnredlist.org/details/59450/0

Caudata Culture. www.caudata.org/cc/species/Neurergus/N_kaiseri.shtml

 

TAXONOMY
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Perciformes
Family: Cichlidae

Genus: Symphysodon aequifasciatus

GENERAL CHARACTERISTICS: Color varies as they age. They present a dark brownish to green body. They have nine vertical bars along the body, but lack a bold centrally located bar. They have irregular metallic streaks along the belly, dorsal fin, anal fins, and on the dorsal area of the body of green, blue, or turquoise.

Length up to 5 inches (13.7 cm)

DISTRIBUTION/ HABITAT: Blue Discus are found in freshwater in the South America eastern Amazon River basin in Brazil In deep, rocky areas in crevices and among roots. Normally in schools.

DIET IN THE WILD: They feed on insect larvae, insects, and planktonic invertebrates.

REPRODUCTION: S. aequifasciatus eggs are deposited on stones or plants; both parents defend eggs and larvae; larvae feed on a skin mucus during their first few days.

CONSERVATION: IUCN Not Evaluated

References

California Academy of Sciences Steinhart Aquarium, Flooded Amazon 2018 (Vetted C Delbeek)

Ron’s Flickr  https://www.flickr.com/photos/cas_docents/27863424969/in/dateposted-public/

fishbase www.fishbase.org/summary/Symphysodon-aequifasciatus.html

Animal Diversity Web. animaldiversity.org/accounts/Symphysodon_aequifasciatus/c…

Ron’s WordPress Shortlink wp.me/p1DZ4b-1TF

 

 

 

 

 

 

 

TAXONOMY
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Gasterosteiformes
Family: Aulorhynchidae (Tube-snouts)

Genus/species: Aulorhynchus flavidus

GENERAL CHARACTERISTICS: The body has a small caudal fin and small soft dorsal fin. Color is a pale mottled brown, varying from olive-green to yellow-brown dorsally, creamy white ventrally and a bright silvery patch between operculum and pectorals extending to throat.

Length up to length: 18.0 cm (7 inches)

 

DISTRIBUTION/HABITAT: occurs on the west coast of North America from Prince William Sound, Alaska, to Rompiente, Baja California. Found in kelp beds, eelgrass, rocky areas, and over sand bottoms.

 

DIET IN THE WILD: Feeds on small crustaceans and fish larvae.

REPRODUCTION: A nest is constructed in kelp and guarded by the male.

LONGEVITY: Up to 9 years

CONSERVATION: IUCN Least Concern

References

California Academy of Sciences, Steinhart Aquarium, California Coast Gallery 2018

Ron’s WordPress Shortlink https://wp.me/p1DZ4b-1Tv

fishbase  www.fishbase.org/summary/3270

Pacific coast Fishes Eschmeyer et al Houghton Mifflin 1986 page 128

IUCN www.iucnredlist.org/details/65134524/0

 EOL eol.org/pages/207010/overview

TAXONOMY
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Coleoptera
Family: Scarabaeidae
Subfamily: Cetoniinae

Genus/species: Pachnoda marginata

GENERAL CHARACTERISTICS: They have a yellow with brownish-black front wings that can be seen on its back. Their body is shiny black. Size of around (2,5 cm) 1 inch

DISTRIBUTION: Central and Western Africa

DIET IN THE WILD: These adult beetles eat flowers and fruit. Their larvae have enzyme-releasing microbes in their digestive system which breakdown tough fibrous food. The larvae and their internal microorganisms recycle nutrients back to the forest floor.

REPRODUCTION: Eggs and grubs live underground. The grubs eat rotten fruit and decomposing leaves.
From egg to beetle takes about 3 to 5 months depending on temperature and beetles will live for 2 to 5 months.

REMARKS: the most common pet beetle

References

California Academy of Sciences Rainforest 2018

Ron’s WordPress Shortlink https://wp.me/p1DZ4b-1Tn

Ron’s flickr https://www.flickr.com/photos/cas_docents/38840093994/in/dateposted-public/

 

1-13-18 Northern Feather Duster Worms from Ron’s California Coast Gallery

TAXONOMY
Kingdom: Animalia
Phylum: Annelida
Class: Polychaeta
Order: Sabellida
Family: Sabellidae

Genus/species: Eudistylia vancouveri

GENERAL CHARACTERISTICS: E. vancouveri secretes a soft, leathery, parchment like tube. The peristomium has several featherlike banded green and purple or maroon light sensitive radioles (tentacles) that are closely associated with the mouth, forming a feather-duster like structure. The radioles are also used for gas exchange (like gills) but the circulatory pattern within them is unusual. Instead of having afferent and efferent vessels, the radioles have a single branchial vessel in each radiole which the blood flows in and out of. Sabellids possess giant nerve fibers running down their body which allows them to retract rapidly into their tube if disturbed.

The pencil like vertical tubes are up to about 45 cm (18 in) long and the tentacle plumes up to 2 inches in diameter.

An excellent group of diagrams of fan worm anatomy can be found on page 27 of the Marine Biology Coloring Book by T. Niesen (2000).

 

Northern Feather Duster Worm30312750995_19fd3dac96_o

DISTRIBUTION/HABITAT: Found from Alaska to central California in low intertidal areas to 20 m (60 ft) deep. Often in large clusters attached to crevices of boulders, bedrock, pilings; and on vertical rock faces and surge channels in heavy surf.

DIET IN THE WILD: Plankton-feeders such as this often live where there are strong currents and wave action, moving food past the animal at a high rate.

REPRODUCTION: The sexes are separate in these worms, but gametes are produced on internal surfaces rather than in gonads. During spawning, the sperm and eggs are carried up the same groove that carries the fecal pellets and shed into the water. Fertilization is thus a random process, and the larvae that develop are planktonic spheroids with flagella and cilia, at first looking nothing like worms. They add segments little by little and finally drop out of the plankton as real worms, to begin their feather-duster life.

REMARKS: E. vancouveri are marine segmented worms that are sessile, attached to rocks or sand by their base.

Northern Feather Duster Worms are light sensitive and will retract when a shadow passes over them to protect their delicate radiaols.

References

California Academy of Sciences J. Charles Delbeek, M.Sc.
Assistant Curator, Steinhart Aquarium

EOL eol.org/pages/614627/details

University of Puget Sound  www.pugetsound.edu/academics/academic-resources/slater-mu…

Wallawalla.edu inverts.wallawalla.edu/Annelida/Sabellidae/Eudistylia_van…

Ron’s Flickr  https://www.flickr.com/photos/cas_docents/30312750995/in/dateposted-public/

Ron’s WordPress shortlink  http://wp.me/p1DZ4b-1IA

 

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